./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-1.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_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme --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 faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:59:30,445 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:59:30,536 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:59:30,544 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:59:30,545 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:59:30,578 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:59:30,579 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:59:30,580 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:59:30,581 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:59:30,582 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:59:30,583 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:59:30,583 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:59:30,584 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:59:30,585 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:59:30,586 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:59:30,587 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:59:30,588 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:59:30,588 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:59:30,589 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:59:30,590 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:59:30,591 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:59:30,592 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:59:30,592 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:59:30,593 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:59:30,594 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:59:30,594 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:59:30,595 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:59:30,595 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:59:30,596 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:59:30,597 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:59:30,597 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:59:30,598 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:59:30,598 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:59:30,599 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:59:30,600 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:59:30,600 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:59:30,600 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:59:30,601 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:59:30,601 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:59:30,602 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:59:30,602 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:59:30,603 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:59:30,603 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_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 [2023-11-26 11:59:30,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:59:30,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:59:30,976 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:59:30,978 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:59:30,978 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:59:30,980 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2023-11-26 11:59:34,588 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:59:34,976 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:59:34,977 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2023-11-26 11:59:34,989 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/data/5725d243a/1b9118c198fb457ba35efe0562aeca67/FLAG161e779c3 [2023-11-26 11:59:35,009 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/data/5725d243a/1b9118c198fb457ba35efe0562aeca67 [2023-11-26 11:59:35,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:59:35,015 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:59:35,017 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:59:35,017 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:59:35,024 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:59:35,026 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:59:35" (1/1) ... [2023-11-26 11:59:35,027 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10055c5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:35, skipping insertion in model container [2023-11-26 11:59:35,027 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:59:35" (1/1) ... [2023-11-26 11:59:35,063 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:59:35,311 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_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c[2781,2794] [2023-11-26 11:59:35,341 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:59:35,355 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:59:35,388 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_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c[2781,2794] [2023-11-26 11:59:35,396 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:59:35,415 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:59:35,416 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:35 WrapperNode [2023-11-26 11:59:35,417 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:59:35,418 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:59:35,419 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:59:35,419 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:59:35,429 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:35" (1/1) ... [2023-11-26 11:59:35,442 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:35" (1/1) ... [2023-11-26 11:59:35,491 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 17, calls inlined = 31, statements flattened = 289 [2023-11-26 11:59:35,492 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:59:35,493 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:59:35,493 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:59:35,493 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:59:35,516 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:35" (1/1) ... [2023-11-26 11:59:35,517 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:35" (1/1) ... [2023-11-26 11:59:35,525 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:35" (1/1) ... [2023-11-26 11:59:35,553 INFO L175 MemorySlicer]: Split 13 memory accesses to 4 slices as follows [2, 7, 2, 2]. 54 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]. [2023-11-26 11:59:35,554 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:35" (1/1) ... [2023-11-26 11:59:35,554 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:35" (1/1) ... [2023-11-26 11:59:35,571 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:35" (1/1) ... [2023-11-26 11:59:35,578 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:35" (1/1) ... [2023-11-26 11:59:35,585 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:35" (1/1) ... [2023-11-26 11:59:35,588 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:35" (1/1) ... [2023-11-26 11:59:35,595 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:59:35,596 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:59:35,597 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:59:35,597 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:59:35,598 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:35" (1/1) ... [2023-11-26 11:59:35,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:59:35,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:35,658 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:59:35,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:59:35,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:59:35,725 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 11:59:35,725 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 11:59:35,725 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 11:59:35,726 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 11:59:35,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:59:35,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:59:35,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:59:35,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:59:35,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:59:35,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:59:35,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:59:35,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:59:35,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:59:35,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:59:35,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:59:35,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:59:35,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:59:35,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:59:35,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:59:35,735 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:59:35,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:59:35,738 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:59:35,991 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:59:35,995 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:59:36,752 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:59:37,607 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:59:37,608 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-26 11:59:37,609 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:59:37 BoogieIcfgContainer [2023-11-26 11:59:37,610 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:59:37,616 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:59:37,617 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:59:37,621 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:59:37,622 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:59:35" (1/3) ... [2023-11-26 11:59:37,623 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c90eca2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:59:37, skipping insertion in model container [2023-11-26 11:59:37,624 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:35" (2/3) ... [2023-11-26 11:59:37,626 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c90eca2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:59:37, skipping insertion in model container [2023-11-26 11:59:37,626 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:59:37" (3/3) ... [2023-11-26 11:59:37,631 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2023-11-26 11:59:37,645 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:59:37,660 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:59:37,661 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:59:37,661 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:59:37,748 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 11:59:37,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 21 transitions, 56 flow [2023-11-26 11:59:37,864 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2023-11-26 11:59:37,865 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:59:37,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 3/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2023-11-26 11:59:37,869 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 21 transitions, 56 flow [2023-11-26 11:59:37,880 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 18 transitions, 48 flow [2023-11-26 11:59:37,906 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:59:37,917 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;@76967a78, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:59:37,918 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-26 11:59:37,942 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:59:37,942 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2023-11-26 11:59:37,943 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:59:37,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:59:37,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:37,945 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:59:37,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:37,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1642167946, now seen corresponding path program 1 times [2023-11-26 11:59:37,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:37,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930461063] [2023-11-26 11:59:37,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:37,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:38,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:38,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:38,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:38,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930461063] [2023-11-26 11:59:38,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930461063] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:38,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:38,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:59:38,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829502885] [2023-11-26 11:59:38,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:38,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:59:38,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:39,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:59:39,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:59:39,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-26 11:59:39,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:39,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:59:39,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-26 11:59:39,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:59:39,471 INFO L124 PetriNetUnfolderBase]: 101/166 cut-off events. [2023-11-26 11:59:39,471 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-26 11:59:39,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352 conditions, 166 events. 101/166 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 481 event pairs, 9 based on Foata normal form. 1/107 useless extension candidates. Maximal degree in co-relation 267. Up to 111 conditions per place. [2023-11-26 11:59:39,483 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 28 selfloop transitions, 10 changer transitions 1/42 dead transitions. [2023-11-26 11:59:39,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 42 transitions, 189 flow [2023-11-26 11:59:39,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:59:39,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:59:39,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2023-11-26 11:59:39,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2023-11-26 11:59:39,504 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 65 transitions. [2023-11-26 11:59:39,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 65 transitions. [2023-11-26 11:59:39,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:59:39,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 65 transitions. [2023-11-26 11:59:39,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:39,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 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) [2023-11-26 11:59:39,524 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 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) [2023-11-26 11:59:39,527 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 48 flow. Second operand 5 states and 65 transitions. [2023-11-26 11:59:39,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 42 transitions, 189 flow [2023-11-26 11:59:39,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 42 transitions, 171 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:59:39,538 INFO L231 Difference]: Finished difference. Result has 25 places, 27 transitions, 103 flow [2023-11-26 11:59:39,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=25, PETRI_TRANSITIONS=27} [2023-11-26 11:59:39,549 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2023-11-26 11:59:39,549 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 27 transitions, 103 flow [2023-11-26 11:59:39,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:39,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:59:39,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:39,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:59:39,552 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:59:39,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:39,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1394700661, now seen corresponding path program 1 times [2023-11-26 11:59:39,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:39,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460140954] [2023-11-26 11:59:39,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:39,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:39,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:39,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460140954] [2023-11-26 11:59:39,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460140954] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:39,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:39,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:59:39,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284020873] [2023-11-26 11:59:39,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:40,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:59:40,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:40,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:59:40,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:59:40,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-26 11:59:40,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 27 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:40,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:59:40,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-26 11:59:40,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:59:40,337 INFO L124 PetriNetUnfolderBase]: 131/226 cut-off events. [2023-11-26 11:59:40,338 INFO L125 PetriNetUnfolderBase]: For 191/191 co-relation queries the response was YES. [2023-11-26 11:59:40,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 706 conditions, 226 events. 131/226 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 777 event pairs, 43 based on Foata normal form. 12/216 useless extension candidates. Maximal degree in co-relation 386. Up to 117 conditions per place. [2023-11-26 11:59:40,342 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 33 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2023-11-26 11:59:40,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 42 transitions, 238 flow [2023-11-26 11:59:40,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:59:40,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:59:40,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2023-11-26 11:59:40,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2023-11-26 11:59:40,347 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 47 transitions. [2023-11-26 11:59:40,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 47 transitions. [2023-11-26 11:59:40,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:59:40,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 47 transitions. [2023-11-26 11:59:40,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:40,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:40,356 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:40,356 INFO L175 Difference]: Start difference. First operand has 25 places, 27 transitions, 103 flow. Second operand 4 states and 47 transitions. [2023-11-26 11:59:40,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 42 transitions, 238 flow [2023-11-26 11:59:40,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 42 transitions, 232 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-26 11:59:40,367 INFO L231 Difference]: Finished difference. Result has 31 places, 31 transitions, 155 flow [2023-11-26 11:59:40,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=155, PETRI_PLACES=31, PETRI_TRANSITIONS=31} [2023-11-26 11:59:40,368 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 9 predicate places. [2023-11-26 11:59:40,372 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 31 transitions, 155 flow [2023-11-26 11:59:40,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:40,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:59:40,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:40,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:59:40,374 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:59:40,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:40,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1626431928, now seen corresponding path program 1 times [2023-11-26 11:59:40,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:40,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398982827] [2023-11-26 11:59:40,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:40,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:40,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:40,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:40,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398982827] [2023-11-26 11:59:40,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398982827] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:40,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:40,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:59:40,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401616872] [2023-11-26 11:59:40,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:40,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:59:40,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:40,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:59:40,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:59:40,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-26 11:59:40,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 31 transitions, 155 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:40,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:59:40,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-26 11:59:40,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:59:40,763 INFO L124 PetriNetUnfolderBase]: 105/187 cut-off events. [2023-11-26 11:59:40,763 INFO L125 PetriNetUnfolderBase]: For 354/354 co-relation queries the response was YES. [2023-11-26 11:59:40,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 658 conditions, 187 events. 105/187 cut-off events. For 354/354 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 614 event pairs, 30 based on Foata normal form. 5/191 useless extension candidates. Maximal degree in co-relation 547. Up to 104 conditions per place. [2023-11-26 11:59:40,770 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 29 selfloop transitions, 4 changer transitions 4/40 dead transitions. [2023-11-26 11:59:40,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 40 transitions, 272 flow [2023-11-26 11:59:40,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:59:40,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:59:40,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2023-11-26 11:59:40,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2023-11-26 11:59:40,775 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 45 transitions. [2023-11-26 11:59:40,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 45 transitions. [2023-11-26 11:59:40,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:59:40,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 45 transitions. [2023-11-26 11:59:40,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:40,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:40,781 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:40,781 INFO L175 Difference]: Start difference. First operand has 31 places, 31 transitions, 155 flow. Second operand 4 states and 45 transitions. [2023-11-26 11:59:40,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 40 transitions, 272 flow [2023-11-26 11:59:40,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 268 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-26 11:59:40,786 INFO L231 Difference]: Finished difference. Result has 35 places, 28 transitions, 141 flow [2023-11-26 11:59:40,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2023-11-26 11:59:40,787 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 13 predicate places. [2023-11-26 11:59:40,787 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 141 flow [2023-11-26 11:59:40,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:40,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:59:40,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:40,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:59:40,788 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:59:40,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:40,789 INFO L85 PathProgramCache]: Analyzing trace with hash -900029099, now seen corresponding path program 1 times [2023-11-26 11:59:40,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:40,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729121292] [2023-11-26 11:59:40,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:40,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:40,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:40,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:40,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:40,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729121292] [2023-11-26 11:59:40,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729121292] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:40,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295889010] [2023-11-26 11:59:40,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:40,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:40,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:40,994 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:41,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:59:41,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:41,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:59:41,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:41,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:41,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:41,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:41,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295889010] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:41,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:59:41,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-26 11:59:41,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965639121] [2023-11-26 11:59:41,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:41,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:59:41,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:41,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:59:41,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:59:41,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-26 11:59:41,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 141 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 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) [2023-11-26 11:59:41,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:59:41,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-26 11:59:41,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:59:41,573 INFO L124 PetriNetUnfolderBase]: 82/140 cut-off events. [2023-11-26 11:59:41,574 INFO L125 PetriNetUnfolderBase]: For 342/342 co-relation queries the response was YES. [2023-11-26 11:59:41,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 140 events. 82/140 cut-off events. For 342/342 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 379 event pairs, 12 based on Foata normal form. 14/152 useless extension candidates. Maximal degree in co-relation 490. Up to 89 conditions per place. [2023-11-26 11:59:41,578 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 28 selfloop transitions, 6 changer transitions 0/37 dead transitions. [2023-11-26 11:59:41,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 251 flow [2023-11-26 11:59:41,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:59:41,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:59:41,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2023-11-26 11:59:41,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2023-11-26 11:59:41,581 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 48 transitions. [2023-11-26 11:59:41,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 48 transitions. [2023-11-26 11:59:41,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:59:41,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 48 transitions. [2023-11-26 11:59:41,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:41,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 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) [2023-11-26 11:59:41,585 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 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) [2023-11-26 11:59:41,586 INFO L175 Difference]: Start difference. First operand has 35 places, 28 transitions, 141 flow. Second operand 5 states and 48 transitions. [2023-11-26 11:59:41,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 251 flow [2023-11-26 11:59:41,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 37 transitions, 209 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-11-26 11:59:41,595 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 140 flow [2023-11-26 11:59:41,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-11-26 11:59:41,596 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 11 predicate places. [2023-11-26 11:59:41,597 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 140 flow [2023-11-26 11:59:41,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 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) [2023-11-26 11:59:41,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:59:41,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:41,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:41,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:41,806 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:59:41,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:41,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1162304328, now seen corresponding path program 1 times [2023-11-26 11:59:41,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:41,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144931771] [2023-11-26 11:59:41,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:41,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:41,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:42,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:42,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144931771] [2023-11-26 11:59:42,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144931771] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:42,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850530192] [2023-11-26 11:59:42,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:42,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:42,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:42,011 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:42,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:59:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:42,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:59:42,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:42,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:42,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:42,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850530192] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:42,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:59:42,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-26 11:59:42,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021239028] [2023-11-26 11:59:42,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:42,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:59:42,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:42,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:59:42,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:59:42,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-26 11:59:42,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 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) [2023-11-26 11:59:42,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:59:42,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-26 11:59:42,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:59:42,404 INFO L124 PetriNetUnfolderBase]: 62/108 cut-off events. [2023-11-26 11:59:42,405 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2023-11-26 11:59:42,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395 conditions, 108 events. 62/108 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 231 event pairs, 7 based on Foata normal form. 9/114 useless extension candidates. Maximal degree in co-relation 372. Up to 86 conditions per place. [2023-11-26 11:59:42,407 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 27 selfloop transitions, 6 changer transitions 0/36 dead transitions. [2023-11-26 11:59:42,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 36 transitions, 232 flow [2023-11-26 11:59:42,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:59:42,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:59:42,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2023-11-26 11:59:42,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2023-11-26 11:59:42,411 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 48 transitions. [2023-11-26 11:59:42,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 48 transitions. [2023-11-26 11:59:42,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:59:42,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 48 transitions. [2023-11-26 11:59:42,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:42,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 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) [2023-11-26 11:59:42,415 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 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) [2023-11-26 11:59:42,415 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 140 flow. Second operand 5 states and 48 transitions. [2023-11-26 11:59:42,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 36 transitions, 232 flow [2023-11-26 11:59:42,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 36 transitions, 229 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:59:42,420 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 161 flow [2023-11-26 11:59:42,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=161, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-11-26 11:59:42,424 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2023-11-26 11:59:42,425 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 161 flow [2023-11-26 11:59:42,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 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) [2023-11-26 11:59:42,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:59:42,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:42,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:42,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:42,632 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:59:42,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:42,633 INFO L85 PathProgramCache]: Analyzing trace with hash 356427372, now seen corresponding path program 1 times [2023-11-26 11:59:42,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:42,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124432460] [2023-11-26 11:59:42,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:42,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:42,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:44,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:44,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124432460] [2023-11-26 11:59:44,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124432460] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:44,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809180223] [2023-11-26 11:59:44,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:44,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:44,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:44,234 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:44,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:59:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:44,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-26 11:59:44,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:44,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:59:44,859 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 87 treesize of output 59 [2023-11-26 11:59:44,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:44,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:46,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809180223] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:46,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:46,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-26 11:59:46,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268451410] [2023-11-26 11:59:46,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:46,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 11:59:46,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:46,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 11:59:46,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-11-26 11:59:46,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-26 11:59:46,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 161 flow. Second operand has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 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) [2023-11-26 11:59:46,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:59:46,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-26 11:59:46,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:59:47,068 INFO L124 PetriNetUnfolderBase]: 96/177 cut-off events. [2023-11-26 11:59:47,068 INFO L125 PetriNetUnfolderBase]: For 208/208 co-relation queries the response was YES. [2023-11-26 11:59:47,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 692 conditions, 177 events. 96/177 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 496 event pairs, 0 based on Foata normal form. 1/175 useless extension candidates. Maximal degree in co-relation 533. Up to 100 conditions per place. [2023-11-26 11:59:47,072 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 46 selfloop transitions, 25 changer transitions 4/78 dead transitions. [2023-11-26 11:59:47,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 78 transitions, 498 flow [2023-11-26 11:59:47,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:59:47,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 11:59:47,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 127 transitions. [2023-11-26 11:59:47,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2023-11-26 11:59:47,075 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 127 transitions. [2023-11-26 11:59:47,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 127 transitions. [2023-11-26 11:59:47,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:59:47,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 127 transitions. [2023-11-26 11:59:47,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 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) [2023-11-26 11:59:47,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 21.0) internal successors, (273), 13 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:47,079 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 21.0) internal successors, (273), 13 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:47,080 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 161 flow. Second operand 12 states and 127 transitions. [2023-11-26 11:59:47,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 78 transitions, 498 flow [2023-11-26 11:59:47,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 78 transitions, 495 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:59:47,085 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 351 flow [2023-11-26 11:59:47,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=351, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2023-11-26 11:59:47,087 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 26 predicate places. [2023-11-26 11:59:47,087 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 351 flow [2023-11-26 11:59:47,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 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) [2023-11-26 11:59:47,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:59:47,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:47,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:47,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:47,297 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:59:47,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:47,298 INFO L85 PathProgramCache]: Analyzing trace with hash -746252018, now seen corresponding path program 2 times [2023-11-26 11:59:47,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:47,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428164676] [2023-11-26 11:59:47,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:47,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:47,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:49,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:49,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:49,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428164676] [2023-11-26 11:59:49,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428164676] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:49,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562841137] [2023-11-26 11:59:49,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:59:49,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:49,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:49,108 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:49,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:59:49,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:59:49,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:59:49,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-26 11:59:49,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:49,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:59:49,623 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 87 treesize of output 59 [2023-11-26 11:59:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:49,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:51,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:51,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562841137] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:51,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:51,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2023-11-26 11:59:51,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131461942] [2023-11-26 11:59:51,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:51,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 11:59:51,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:51,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 11:59:51,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:59:51,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-26 11:59:51,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 351 flow. Second operand has 16 states, 16 states have (on average 7.1875) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:51,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:59:51,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-26 11:59:51,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:59:51,686 INFO L124 PetriNetUnfolderBase]: 95/178 cut-off events. [2023-11-26 11:59:51,686 INFO L125 PetriNetUnfolderBase]: For 424/424 co-relation queries the response was YES. [2023-11-26 11:59:51,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 829 conditions, 178 events. 95/178 cut-off events. For 424/424 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 502 event pairs, 4 based on Foata normal form. 1/176 useless extension candidates. Maximal degree in co-relation 663. Up to 126 conditions per place. [2023-11-26 11:59:51,690 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 35 selfloop transitions, 27 changer transitions 4/69 dead transitions. [2023-11-26 11:59:51,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 69 transitions, 547 flow [2023-11-26 11:59:51,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:59:51,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 11:59:51,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 122 transitions. [2023-11-26 11:59:51,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2023-11-26 11:59:51,693 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 122 transitions. [2023-11-26 11:59:51,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 122 transitions. [2023-11-26 11:59:51,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:59:51,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 122 transitions. [2023-11-26 11:59:51,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 10.166666666666666) internal successors, (122), 12 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) [2023-11-26 11:59:51,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 21.0) internal successors, (273), 13 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:51,696 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 21.0) internal successors, (273), 13 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:51,696 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 351 flow. Second operand 12 states and 122 transitions. [2023-11-26 11:59:51,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 69 transitions, 547 flow [2023-11-26 11:59:51,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 69 transitions, 509 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-11-26 11:59:51,703 INFO L231 Difference]: Finished difference. Result has 59 places, 48 transitions, 388 flow [2023-11-26 11:59:51,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=388, PETRI_PLACES=59, PETRI_TRANSITIONS=48} [2023-11-26 11:59:51,704 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 37 predicate places. [2023-11-26 11:59:51,704 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 48 transitions, 388 flow [2023-11-26 11:59:51,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.1875) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:51,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:59:51,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:51,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:51,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:51,915 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:59:51,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:51,916 INFO L85 PathProgramCache]: Analyzing trace with hash 2076686380, now seen corresponding path program 3 times [2023-11-26 11:59:51,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:51,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613200207] [2023-11-26 11:59:51,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:51,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:51,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:52,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:52,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613200207] [2023-11-26 11:59:52,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613200207] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:52,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796790531] [2023-11-26 11:59:52,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:59:52,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:52,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:52,990 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:52,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:59:53,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 11:59:53,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:59:53,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-26 11:59:53,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:53,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:59:53,433 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 87 treesize of output 59 [2023-11-26 11:59:53,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:53,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:54,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:54,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796790531] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:54,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:54,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2023-11-26 11:59:54,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398025804] [2023-11-26 11:59:54,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:54,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 11:59:54,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:54,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 11:59:54,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:59:54,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-26 11:59:54,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 48 transitions, 388 flow. Second operand has 16 states, 16 states have (on average 7.1875) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:54,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:59:54,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-26 11:59:54,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:59:55,422 INFO L124 PetriNetUnfolderBase]: 100/187 cut-off events. [2023-11-26 11:59:55,422 INFO L125 PetriNetUnfolderBase]: For 478/478 co-relation queries the response was YES. [2023-11-26 11:59:55,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 917 conditions, 187 events. 100/187 cut-off events. For 478/478 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 552 event pairs, 2 based on Foata normal form. 1/185 useless extension candidates. Maximal degree in co-relation 766. Up to 134 conditions per place. [2023-11-26 11:59:55,426 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 41 selfloop transitions, 23 changer transitions 4/71 dead transitions. [2023-11-26 11:59:55,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 71 transitions, 593 flow [2023-11-26 11:59:55,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 11:59:55,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-26 11:59:55,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 114 transitions. [2023-11-26 11:59:55,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935064935064935 [2023-11-26 11:59:55,428 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 114 transitions. [2023-11-26 11:59:55,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 114 transitions. [2023-11-26 11:59:55,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:59:55,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 114 transitions. [2023-11-26 11:59:55,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:55,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 21.0) internal successors, (252), 12 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) [2023-11-26 11:59:55,431 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 21.0) internal successors, (252), 12 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) [2023-11-26 11:59:55,432 INFO L175 Difference]: Start difference. First operand has 59 places, 48 transitions, 388 flow. Second operand 11 states and 114 transitions. [2023-11-26 11:59:55,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 71 transitions, 593 flow [2023-11-26 11:59:55,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 71 transitions, 503 flow, removed 16 selfloop flow, removed 11 redundant places. [2023-11-26 11:59:55,439 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 365 flow [2023-11-26 11:59:55,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=365, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2023-11-26 11:59:55,440 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 38 predicate places. [2023-11-26 11:59:55,440 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 365 flow [2023-11-26 11:59:55,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.1875) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:55,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:59:55,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:55,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:55,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 11:59:55,648 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:59:55,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:55,648 INFO L85 PathProgramCache]: Analyzing trace with hash -880842868, now seen corresponding path program 4 times [2023-11-26 11:59:55,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:55,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497697493] [2023-11-26 11:59:55,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:55,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:55,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:56,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:56,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:56,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497697493] [2023-11-26 11:59:56,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497697493] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:56,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406943671] [2023-11-26 11:59:56,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:59:56,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:56,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:56,579 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:56,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:59:56,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:59:56,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:59:56,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-26 11:59:56,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:56,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-26 11:59:57,332 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 77 treesize of output 49 [2023-11-26 11:59:57,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:57,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:58,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406943671] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:58,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:58,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-26 11:59:58,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521052866] [2023-11-26 11:59:58,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:58,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 11:59:58,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:58,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 11:59:58,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2023-11-26 11:59:58,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-26 11:59:58,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 365 flow. Second operand has 18 states, 18 states have (on average 7.0) internal successors, (126), 18 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) [2023-11-26 11:59:58,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:59:58,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-26 11:59:58,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:00:00,534 INFO L124 PetriNetUnfolderBase]: 196/346 cut-off events. [2023-11-26 12:00:00,534 INFO L125 PetriNetUnfolderBase]: For 970/970 co-relation queries the response was YES. [2023-11-26 12:00:00,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1767 conditions, 346 events. 196/346 cut-off events. For 970/970 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1226 event pairs, 2 based on Foata normal form. 1/338 useless extension candidates. Maximal degree in co-relation 1408. Up to 131 conditions per place. [2023-11-26 12:00:00,540 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 60 selfloop transitions, 70 changer transitions 2/135 dead transitions. [2023-11-26 12:00:00,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 135 transitions, 1144 flow [2023-11-26 12:00:00,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-26 12:00:00,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-26 12:00:00,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 204 transitions. [2023-11-26 12:00:00,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2023-11-26 12:00:00,543 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 204 transitions. [2023-11-26 12:00:00,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 204 transitions. [2023-11-26 12:00:00,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:00:00,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 204 transitions. [2023-11-26 12:00:00,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 10.2) internal successors, (204), 20 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:00,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 21.0) internal successors, (441), 21 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:00,548 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 21.0) internal successors, (441), 21 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:00,548 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 365 flow. Second operand 20 states and 204 transitions. [2023-11-26 12:00:00,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 135 transitions, 1144 flow [2023-11-26 12:00:00,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 135 transitions, 1087 flow, removed 6 selfloop flow, removed 9 redundant places. [2023-11-26 12:00:00,559 INFO L231 Difference]: Finished difference. Result has 72 places, 92 transitions, 907 flow [2023-11-26 12:00:00,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=907, PETRI_PLACES=72, PETRI_TRANSITIONS=92} [2023-11-26 12:00:00,560 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 50 predicate places. [2023-11-26 12:00:00,561 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 92 transitions, 907 flow [2023-11-26 12:00:00,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.0) internal successors, (126), 18 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) [2023-11-26 12:00:00,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:00:00,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:00,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:00,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-26 12:00:00,774 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 12:00:00,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:00,774 INFO L85 PathProgramCache]: Analyzing trace with hash -366575394, now seen corresponding path program 5 times [2023-11-26 12:00:00,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:00,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660809400] [2023-11-26 12:00:00,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:00,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:01,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:01,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:01,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660809400] [2023-11-26 12:00:01,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660809400] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:01,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475240431] [2023-11-26 12:00:01,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 12:00:01,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:01,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:01,677 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:01,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 12:00:01,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-26 12:00:01,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:00:01,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-26 12:00:01,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:01,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-26 12:00:02,141 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 77 treesize of output 49 [2023-11-26 12:00:02,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:02,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:03,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:00:03,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475240431] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:03,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:00:03,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-11-26 12:00:03,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97135287] [2023-11-26 12:00:03,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:03,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-26 12:00:03,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:03,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-26 12:00:03,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-11-26 12:00:03,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-26 12:00:03,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 92 transitions, 907 flow. Second operand has 19 states, 19 states have (on average 7.157894736842105) internal successors, (136), 19 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:03,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:00:03,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-26 12:00:03,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:00:05,088 INFO L124 PetriNetUnfolderBase]: 230/414 cut-off events. [2023-11-26 12:00:05,088 INFO L125 PetriNetUnfolderBase]: For 1601/1601 co-relation queries the response was YES. [2023-11-26 12:00:05,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2394 conditions, 414 events. 230/414 cut-off events. For 1601/1601 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1581 event pairs, 0 based on Foata normal form. 1/408 useless extension candidates. Maximal degree in co-relation 1768. Up to 213 conditions per place. [2023-11-26 12:00:05,095 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 74 selfloop transitions, 70 changer transitions 5/152 dead transitions. [2023-11-26 12:00:05,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 152 transitions, 1505 flow [2023-11-26 12:00:05,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-26 12:00:05,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-26 12:00:05,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 225 transitions. [2023-11-26 12:00:05,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658385093167702 [2023-11-26 12:00:05,097 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 225 transitions. [2023-11-26 12:00:05,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 225 transitions. [2023-11-26 12:00:05,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:00:05,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 225 transitions. [2023-11-26 12:00:05,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 9.782608695652174) internal successors, (225), 23 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:05,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 21.0) internal successors, (504), 24 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:05,101 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 21.0) internal successors, (504), 24 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:05,101 INFO L175 Difference]: Start difference. First operand has 72 places, 92 transitions, 907 flow. Second operand 23 states and 225 transitions. [2023-11-26 12:00:05,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 152 transitions, 1505 flow [2023-11-26 12:00:05,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 152 transitions, 1244 flow, removed 119 selfloop flow, removed 6 redundant places. [2023-11-26 12:00:05,122 INFO L231 Difference]: Finished difference. Result has 92 places, 105 transitions, 1004 flow [2023-11-26 12:00:05,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1004, PETRI_PLACES=92, PETRI_TRANSITIONS=105} [2023-11-26 12:00:05,123 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 70 predicate places. [2023-11-26 12:00:05,123 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 105 transitions, 1004 flow [2023-11-26 12:00:05,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.157894736842105) internal successors, (136), 19 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:05,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:00:05,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:05,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:05,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 12:00:05,339 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 12:00:05,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:05,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2057220366, now seen corresponding path program 6 times [2023-11-26 12:00:05,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:05,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886116092] [2023-11-26 12:00:05,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:05,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:06,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:06,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886116092] [2023-11-26 12:00:06,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886116092] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:06,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523897028] [2023-11-26 12:00:06,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 12:00:06,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:06,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:06,148 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:06,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 12:00:06,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-26 12:00:06,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:00:06,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-26 12:00:06,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:06,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 12:00:06,537 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 77 treesize of output 49 [2023-11-26 12:00:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:06,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:07,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:00:07,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523897028] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:07,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:00:07,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2023-11-26 12:00:07,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305888746] [2023-11-26 12:00:07,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:07,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 12:00:07,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:07,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 12:00:07,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-11-26 12:00:07,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-26 12:00:07,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 105 transitions, 1004 flow. Second operand has 16 states, 16 states have (on average 7.1875) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:07,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:00:07,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-26 12:00:07,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:00:08,053 INFO L124 PetriNetUnfolderBase]: 228/416 cut-off events. [2023-11-26 12:00:08,053 INFO L125 PetriNetUnfolderBase]: For 1214/1214 co-relation queries the response was YES. [2023-11-26 12:00:08,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2259 conditions, 416 events. 228/416 cut-off events. For 1214/1214 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1609 event pairs, 12 based on Foata normal form. 1/398 useless extension candidates. Maximal degree in co-relation 2195. Up to 358 conditions per place. [2023-11-26 12:00:08,060 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 87 selfloop transitions, 31 changer transitions 5/126 dead transitions. [2023-11-26 12:00:08,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 126 transitions, 1328 flow [2023-11-26 12:00:08,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 12:00:08,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-26 12:00:08,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 110 transitions. [2023-11-26 12:00:08,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2023-11-26 12:00:08,062 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 110 transitions. [2023-11-26 12:00:08,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 110 transitions. [2023-11-26 12:00:08,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:00:08,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 110 transitions. [2023-11-26 12:00:08,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 10.0) internal successors, (110), 11 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:08,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 21.0) internal successors, (252), 12 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) [2023-11-26 12:00:08,065 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 21.0) internal successors, (252), 12 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) [2023-11-26 12:00:08,065 INFO L175 Difference]: Start difference. First operand has 92 places, 105 transitions, 1004 flow. Second operand 11 states and 110 transitions. [2023-11-26 12:00:08,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 126 transitions, 1328 flow [2023-11-26 12:00:08,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 126 transitions, 1128 flow, removed 35 selfloop flow, removed 18 redundant places. [2023-11-26 12:00:08,079 INFO L231 Difference]: Finished difference. Result has 86 places, 107 transitions, 906 flow [2023-11-26 12:00:08,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=906, PETRI_PLACES=86, PETRI_TRANSITIONS=107} [2023-11-26 12:00:08,081 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 64 predicate places. [2023-11-26 12:00:08,081 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 107 transitions, 906 flow [2023-11-26 12:00:08,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.1875) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:08,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:00:08,081 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:08,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:08,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:08,289 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 12:00:08,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:08,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1239704749, now seen corresponding path program 7 times [2023-11-26 12:00:08,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:08,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650352197] [2023-11-26 12:00:08,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:08,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:08,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:00:08,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:08,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650352197] [2023-11-26 12:00:08,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650352197] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:08,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102472385] [2023-11-26 12:00:08,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 12:00:08,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:08,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:08,489 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:08,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 12:00:08,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:08,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 12:00:08,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:08,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:00:08,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:08,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:00:08,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102472385] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:08,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:00:08,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-26 12:00:08,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480491478] [2023-11-26 12:00:08,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:08,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 12:00:08,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:08,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 12:00:08,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-26 12:00:08,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-26 12:00:08,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 107 transitions, 906 flow. Second operand has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 12 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) [2023-11-26 12:00:08,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:00:08,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-26 12:00:08,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:00:09,098 INFO L124 PetriNetUnfolderBase]: 216/448 cut-off events. [2023-11-26 12:00:09,098 INFO L125 PetriNetUnfolderBase]: For 1460/1460 co-relation queries the response was YES. [2023-11-26 12:00:09,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2163 conditions, 448 events. 216/448 cut-off events. For 1460/1460 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2052 event pairs, 59 based on Foata normal form. 32/469 useless extension candidates. Maximal degree in co-relation 2001. Up to 179 conditions per place. [2023-11-26 12:00:09,106 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 94 selfloop transitions, 19 changer transitions 5/121 dead transitions. [2023-11-26 12:00:09,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 121 transitions, 1240 flow [2023-11-26 12:00:09,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 12:00:09,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 12:00:09,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 76 transitions. [2023-11-26 12:00:09,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170068027210885 [2023-11-26 12:00:09,108 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 76 transitions. [2023-11-26 12:00:09,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 76 transitions. [2023-11-26 12:00:09,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:00:09,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 76 transitions. [2023-11-26 12:00:09,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:09,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:09,110 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:09,110 INFO L175 Difference]: Start difference. First operand has 86 places, 107 transitions, 906 flow. Second operand 7 states and 76 transitions. [2023-11-26 12:00:09,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 121 transitions, 1240 flow [2023-11-26 12:00:09,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 121 transitions, 1140 flow, removed 7 selfloop flow, removed 11 redundant places. [2023-11-26 12:00:09,126 INFO L231 Difference]: Finished difference. Result has 82 places, 93 transitions, 798 flow [2023-11-26 12:00:09,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=798, PETRI_PLACES=82, PETRI_TRANSITIONS=93} [2023-11-26 12:00:09,128 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 60 predicate places. [2023-11-26 12:00:09,129 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 93 transitions, 798 flow [2023-11-26 12:00:09,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 12 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) [2023-11-26 12:00:09,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:00:09,130 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:09,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:09,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:09,336 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 12:00:09,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:09,337 INFO L85 PathProgramCache]: Analyzing trace with hash 498835016, now seen corresponding path program 8 times [2023-11-26 12:00:09,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:09,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015420614] [2023-11-26 12:00:09,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:09,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:09,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:09,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:00:09,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:09,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015420614] [2023-11-26 12:00:09,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015420614] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:09,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687129465] [2023-11-26 12:00:09,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 12:00:09,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:09,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:09,509 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:09,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 12:00:09,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 12:00:09,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:00:09,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 12:00:09,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:00:09,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:09,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:00:09,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687129465] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:09,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:00:09,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-26 12:00:09,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604587066] [2023-11-26 12:00:09,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:09,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 12:00:09,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:09,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 12:00:09,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-26 12:00:09,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-26 12:00:09,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 93 transitions, 798 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:09,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:00:09,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-26 12:00:09,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:00:10,023 INFO L124 PetriNetUnfolderBase]: 145/297 cut-off events. [2023-11-26 12:00:10,023 INFO L125 PetriNetUnfolderBase]: For 1051/1051 co-relation queries the response was YES. [2023-11-26 12:00:10,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1435 conditions, 297 events. 145/297 cut-off events. For 1051/1051 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1150 event pairs, 37 based on Foata normal form. 14/304 useless extension candidates. Maximal degree in co-relation 1324. Up to 144 conditions per place. [2023-11-26 12:00:10,028 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 59 selfloop transitions, 9 changer transitions 17/88 dead transitions. [2023-11-26 12:00:10,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 88 transitions, 853 flow [2023-11-26 12:00:10,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 12:00:10,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 12:00:10,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 71 transitions. [2023-11-26 12:00:10,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2023-11-26 12:00:10,030 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 71 transitions. [2023-11-26 12:00:10,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 71 transitions. [2023-11-26 12:00:10,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:00:10,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 71 transitions. [2023-11-26 12:00:10,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:10,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:10,032 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:10,032 INFO L175 Difference]: Start difference. First operand has 82 places, 93 transitions, 798 flow. Second operand 7 states and 71 transitions. [2023-11-26 12:00:10,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 88 transitions, 853 flow [2023-11-26 12:00:10,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 88 transitions, 801 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-11-26 12:00:10,042 INFO L231 Difference]: Finished difference. Result has 81 places, 66 transitions, 505 flow [2023-11-26 12:00:10,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=505, PETRI_PLACES=81, PETRI_TRANSITIONS=66} [2023-11-26 12:00:10,044 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 59 predicate places. [2023-11-26 12:00:10,044 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 66 transitions, 505 flow [2023-11-26 12:00:10,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:10,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:00:10,044 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:10,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:10,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 12:00:10,252 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 12:00:10,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:10,252 INFO L85 PathProgramCache]: Analyzing trace with hash 644794061, now seen corresponding path program 9 times [2023-11-26 12:00:10,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:10,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370980876] [2023-11-26 12:00:10,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:10,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:10,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:10,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:00:10,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:10,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370980876] [2023-11-26 12:00:10,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370980876] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:10,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303366956] [2023-11-26 12:00:10,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 12:00:10,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:10,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:10,529 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:10,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 12:00:10,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 12:00:10,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:00:10,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 12:00:10,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:10,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:00:10,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:10,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:00:10,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303366956] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:10,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:00:10,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-26 12:00:10,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350545836] [2023-11-26 12:00:10,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:10,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 12:00:10,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:10,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 12:00:10,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-26 12:00:10,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-26 12:00:10,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 66 transitions, 505 flow. Second operand has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:10,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:00:10,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-26 12:00:10,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:00:11,054 INFO L124 PetriNetUnfolderBase]: 135/259 cut-off events. [2023-11-26 12:00:11,054 INFO L125 PetriNetUnfolderBase]: For 1166/1166 co-relation queries the response was YES. [2023-11-26 12:00:11,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1235 conditions, 259 events. 135/259 cut-off events. For 1166/1166 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 892 event pairs, 18 based on Foata normal form. 16/270 useless extension candidates. Maximal degree in co-relation 1200. Up to 139 conditions per place. [2023-11-26 12:00:11,058 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 51 selfloop transitions, 20 changer transitions 0/74 dead transitions. [2023-11-26 12:00:11,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 74 transitions, 709 flow [2023-11-26 12:00:11,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 12:00:11,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-26 12:00:11,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 70 transitions. [2023-11-26 12:00:11,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-11-26 12:00:11,061 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 70 transitions. [2023-11-26 12:00:11,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 70 transitions. [2023-11-26 12:00:11,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:00:11,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 70 transitions. [2023-11-26 12:00:11,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:11,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 21.0) internal successors, (189), 9 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:11,067 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 21.0) internal successors, (189), 9 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:11,067 INFO L175 Difference]: Start difference. First operand has 81 places, 66 transitions, 505 flow. Second operand 8 states and 70 transitions. [2023-11-26 12:00:11,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 74 transitions, 709 flow [2023-11-26 12:00:11,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 74 transitions, 650 flow, removed 12 selfloop flow, removed 9 redundant places. [2023-11-26 12:00:11,075 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 497 flow [2023-11-26 12:00:11,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=497, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2023-11-26 12:00:11,076 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 44 predicate places. [2023-11-26 12:00:11,077 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 497 flow [2023-11-26 12:00:11,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:11,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:00:11,077 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:11,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:11,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 12:00:11,283 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 12:00:11,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:11,284 INFO L85 PathProgramCache]: Analyzing trace with hash 2072135018, now seen corresponding path program 10 times [2023-11-26 12:00:11,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:11,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136973356] [2023-11-26 12:00:11,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:11,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:00:11,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:11,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136973356] [2023-11-26 12:00:11,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136973356] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:11,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748036148] [2023-11-26 12:00:11,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 12:00:11,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:11,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:11,473 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:11,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 12:00:11,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 12:00:11,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:00:11,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 12:00:11,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:00:11,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:00:11,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748036148] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:11,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:00:11,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-26 12:00:11,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148664071] [2023-11-26 12:00:11,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:11,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 12:00:11,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:11,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 12:00:11,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-11-26 12:00:11,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-26 12:00:11,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 497 flow. Second operand has 14 states, 14 states have (on average 7.142857142857143) internal successors, (100), 14 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:11,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:00:11,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-26 12:00:11,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:00:11,928 INFO L124 PetriNetUnfolderBase]: 117/224 cut-off events. [2023-11-26 12:00:11,928 INFO L125 PetriNetUnfolderBase]: For 974/974 co-relation queries the response was YES. [2023-11-26 12:00:11,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 224 events. 117/224 cut-off events. For 974/974 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 675 event pairs, 16 based on Foata normal form. 14/235 useless extension candidates. Maximal degree in co-relation 1099. Up to 159 conditions per place. [2023-11-26 12:00:11,931 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 49 selfloop transitions, 15 changer transitions 0/67 dead transitions. [2023-11-26 12:00:11,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 67 transitions, 645 flow [2023-11-26 12:00:11,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 12:00:11,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-26 12:00:11,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 70 transitions. [2023-11-26 12:00:11,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-11-26 12:00:11,933 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 70 transitions. [2023-11-26 12:00:11,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 70 transitions. [2023-11-26 12:00:11,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:00:11,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 70 transitions. [2023-11-26 12:00:11,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:11,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 21.0) internal successors, (189), 9 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:11,934 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 21.0) internal successors, (189), 9 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:11,934 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 497 flow. Second operand 8 states and 70 transitions. [2023-11-26 12:00:11,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 67 transitions, 645 flow [2023-11-26 12:00:11,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 67 transitions, 605 flow, removed 13 selfloop flow, removed 7 redundant places. [2023-11-26 12:00:11,940 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 458 flow [2023-11-26 12:00:11,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=458, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2023-11-26 12:00:11,941 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 41 predicate places. [2023-11-26 12:00:11,942 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 458 flow [2023-11-26 12:00:11,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.142857142857143) internal successors, (100), 14 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:11,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:00:11,942 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:11,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:12,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aaefb6f-9849-4378-8bc2-65ef030c8f0b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:12,149 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 12:00:12,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:12,150 INFO L85 PathProgramCache]: Analyzing trace with hash -2034070010, now seen corresponding path program 11 times [2023-11-26 12:00:12,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:12,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510442203] [2023-11-26 12:00:12,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:12,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat