./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/mult-dist.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/mult-dist.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ --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 c31f1603fd15e011308b2e8fcd1cd45b23f0b00ac0b8b466c4f212460081639c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:38:40,388 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:38:40,502 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:38:40,514 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:38:40,515 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:38:40,558 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:38:40,562 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:38:40,563 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:38:40,564 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:38:40,569 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:38:40,569 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:38:40,570 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:38:40,570 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:38:40,572 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:38:40,573 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:38:40,573 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:38:40,573 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:38:40,574 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:38:40,574 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:38:40,575 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:38:40,575 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:38:40,576 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:38:40,576 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:38:40,576 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:38:40,577 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:38:40,577 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:38:40,578 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:38:40,578 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:38:40,578 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:38:40,579 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:38:40,579 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:38:40,579 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:38:40,580 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:38:40,580 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:38:40,580 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:38:40,580 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:38:40,581 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:38:40,581 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:38:40,581 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:38:40,581 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:38:40,581 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:38:40,582 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:38:40,582 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_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c31f1603fd15e011308b2e8fcd1cd45b23f0b00ac0b8b466c4f212460081639c [2023-11-23 22:38:40,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:38:40,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:38:40,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:38:40,919 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:38:40,920 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:38:40,921 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/weaver/mult-dist.wvr.c [2023-11-23 22:38:44,035 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:38:44,316 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:38:44,317 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/sv-benchmarks/c/weaver/mult-dist.wvr.c [2023-11-23 22:38:44,325 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/data/ebeacd20a/8cda8c7f438e43ccadc1a9cd0f93a1af/FLAG693aba28c [2023-11-23 22:38:44,339 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/data/ebeacd20a/8cda8c7f438e43ccadc1a9cd0f93a1af [2023-11-23 22:38:44,342 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:38:44,343 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:38:44,345 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:38:44,345 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:38:44,351 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:38:44,351 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:38:44" (1/1) ... [2023-11-23 22:38:44,352 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10c6ff96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:44, skipping insertion in model container [2023-11-23 22:38:44,353 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:38:44" (1/1) ... [2023-11-23 22:38:44,377 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:38:44,547 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_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/sv-benchmarks/c/weaver/mult-dist.wvr.c[2155,2168] [2023-11-23 22:38:44,552 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:38:44,562 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:38:44,588 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_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/sv-benchmarks/c/weaver/mult-dist.wvr.c[2155,2168] [2023-11-23 22:38:44,589 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:38:44,604 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:38:44,604 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:44 WrapperNode [2023-11-23 22:38:44,604 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:38:44,606 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:38:44,606 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:38:44,606 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:38:44,614 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:44" (1/1) ... [2023-11-23 22:38:44,622 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:44" (1/1) ... [2023-11-23 22:38:44,642 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 72 [2023-11-23 22:38:44,643 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:38:44,644 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:38:44,644 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:38:44,644 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:38:44,656 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:44" (1/1) ... [2023-11-23 22:38:44,656 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:44" (1/1) ... [2023-11-23 22:38:44,659 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:44" (1/1) ... [2023-11-23 22:38:44,683 INFO L189 HeapSplitter]: Split 8 memory accesses to 4 slices as follows [2, 2, 2, 2] [2023-11-23 22:38:44,684 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:44" (1/1) ... [2023-11-23 22:38:44,684 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:44" (1/1) ... [2023-11-23 22:38:44,700 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:44" (1/1) ... [2023-11-23 22:38:44,703 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:44" (1/1) ... [2023-11-23 22:38:44,706 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:44" (1/1) ... [2023-11-23 22:38:44,707 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:44" (1/1) ... [2023-11-23 22:38:44,710 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:38:44,711 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:38:44,711 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:38:44,711 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:38:44,712 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:44" (1/1) ... [2023-11-23 22:38:44,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:38:44,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:38:44,749 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:38:44,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:38:44,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:38:44,782 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-23 22:38:44,783 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-23 22:38:44,784 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-23 22:38:44,784 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-23 22:38:44,784 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-23 22:38:44,784 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-23 22:38:44,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:38:44,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:38:44,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:38:44,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 22:38:44,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:38:44,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 22:38:44,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 22:38:44,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 22:38:44,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 22:38:44,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:38:44,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:38:44,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 22:38:44,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 22:38:44,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 22:38:44,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 22:38:44,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:38:44,788 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 22:38:44,898 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:38:44,900 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:38:45,160 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:38:45,448 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:38:45,449 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-23 22:38:45,449 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:38:45 BoogieIcfgContainer [2023-11-23 22:38:45,450 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:38:45,452 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:38:45,452 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:38:45,455 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:38:45,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:38:44" (1/3) ... [2023-11-23 22:38:45,456 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67266596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:38:45, skipping insertion in model container [2023-11-23 22:38:45,456 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:44" (2/3) ... [2023-11-23 22:38:45,456 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67266596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:38:45, skipping insertion in model container [2023-11-23 22:38:45,456 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:38:45" (3/3) ... [2023-11-23 22:38:45,458 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2023-11-23 22:38:45,467 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 22:38:45,476 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:38:45,476 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:38:45,476 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 22:38:45,530 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-23 22:38:45,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 27 transitions, 75 flow [2023-11-23 22:38:45,604 INFO L124 PetriNetUnfolderBase]: 3/24 cut-off events. [2023-11-23 22:38:45,604 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-23 22:38:45,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 24 events. 3/24 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2023-11-23 22:38:45,609 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 27 transitions, 75 flow [2023-11-23 22:38:45,613 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 64 flow [2023-11-23 22:38:45,626 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:38:45,633 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;@4504f3b2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:38:45,634 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-23 22:38:45,649 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:38:45,649 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2023-11-23 22:38:45,649 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-23 22:38:45,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:38:45,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:38:45,651 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:38:45,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:45,657 INFO L85 PathProgramCache]: Analyzing trace with hash 2051590417, now seen corresponding path program 1 times [2023-11-23 22:38:45,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:38:45,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688885054] [2023-11-23 22:38:45,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:45,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:38:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:46,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:46,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:38:46,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688885054] [2023-11-23 22:38:46,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688885054] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:38:46,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:38:46,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:38:46,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723185502] [2023-11-23 22:38:46,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:38:46,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:38:46,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:38:46,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:38:46,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:38:46,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-23 22:38:46,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:46,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:38:46,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-23 22:38:46,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:38:46,818 INFO L124 PetriNetUnfolderBase]: 428/631 cut-off events. [2023-11-23 22:38:46,818 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-11-23 22:38:46,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1338 conditions, 631 events. 428/631 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1994 event pairs, 138 based on Foata normal form. 1/468 useless extension candidates. Maximal degree in co-relation 1030. Up to 389 conditions per place. [2023-11-23 22:38:46,835 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 36 selfloop transitions, 4 changer transitions 1/42 dead transitions. [2023-11-23 22:38:46,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 42 transitions, 199 flow [2023-11-23 22:38:46,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:38:46,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:38:46,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2023-11-23 22:38:46,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-23 22:38:46,849 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 54 transitions. [2023-11-23 22:38:46,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 54 transitions. [2023-11-23 22:38:46,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:38:46,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 54 transitions. [2023-11-23 22:38:46,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:46,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:46,864 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:46,866 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 64 flow. Second operand 3 states and 54 transitions. [2023-11-23 22:38:46,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 42 transitions, 199 flow [2023-11-23 22:38:46,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 42 transitions, 177 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-23 22:38:46,877 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 78 flow [2023-11-23 22:38:46,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2023-11-23 22:38:46,885 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-11-23 22:38:46,886 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 78 flow [2023-11-23 22:38:46,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:46,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:38:46,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:38:46,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:38:46,888 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:38:46,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:46,890 INFO L85 PathProgramCache]: Analyzing trace with hash -2074147469, now seen corresponding path program 1 times [2023-11-23 22:38:46,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:38:46,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492370183] [2023-11-23 22:38:46,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:46,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:38:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:47,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:47,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:38:47,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492370183] [2023-11-23 22:38:47,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492370183] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:38:47,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:38:47,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 22:38:47,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244105614] [2023-11-23 22:38:47,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:38:47,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:38:47,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:38:47,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:38:47,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:38:47,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-23 22:38:47,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 78 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2023-11-23 22:38:47,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:38:47,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-23 22:38:47,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:38:47,649 INFO L124 PetriNetUnfolderBase]: 586/837 cut-off events. [2023-11-23 22:38:47,649 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2023-11-23 22:38:47,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2066 conditions, 837 events. 586/837 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2736 event pairs, 231 based on Foata normal form. 2/839 useless extension candidates. Maximal degree in co-relation 597. Up to 620 conditions per place. [2023-11-23 22:38:47,657 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 49 selfloop transitions, 18 changer transitions 3/71 dead transitions. [2023-11-23 22:38:47,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 71 transitions, 355 flow [2023-11-23 22:38:47,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:38:47,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-23 22:38:47,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2023-11-23 22:38:47,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2023-11-23 22:38:47,660 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 89 transitions. [2023-11-23 22:38:47,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 89 transitions. [2023-11-23 22:38:47,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:38:47,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 89 transitions. [2023-11-23 22:38:47,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:47,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:47,672 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:47,672 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 78 flow. Second operand 7 states and 89 transitions. [2023-11-23 22:38:47,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 71 transitions, 355 flow [2023-11-23 22:38:47,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 71 transitions, 342 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:38:47,676 INFO L231 Difference]: Finished difference. Result has 36 places, 42 transitions, 202 flow [2023-11-23 22:38:47,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=202, PETRI_PLACES=36, PETRI_TRANSITIONS=42} [2023-11-23 22:38:47,677 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2023-11-23 22:38:47,677 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 42 transitions, 202 flow [2023-11-23 22:38:47,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2023-11-23 22:38:47,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:38:47,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:38:47,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:38:47,678 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:38:47,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:47,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1694506029, now seen corresponding path program 2 times [2023-11-23 22:38:47,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:38:47,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327223524] [2023-11-23 22:38:47,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:47,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:38:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:48,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:48,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:38:48,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327223524] [2023-11-23 22:38:48,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327223524] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:38:48,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464967065] [2023-11-23 22:38:48,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:38:48,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:38:48,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:38:48,012 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:38:48,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:38:48,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:38:48,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:38:48,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-23 22:38:48,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:38:48,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:48,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:38:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:49,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464967065] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 22:38:49,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:38:49,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 14 [2023-11-23 22:38:49,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707260542] [2023-11-23 22:38:49,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:38:49,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:38:49,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:38:49,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:38:49,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-23 22:38:49,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-23 22:38:49,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 42 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:49,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:38:49,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-23 22:38:49,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:38:50,027 INFO L124 PetriNetUnfolderBase]: 953/1383 cut-off events. [2023-11-23 22:38:50,028 INFO L125 PetriNetUnfolderBase]: For 1336/1336 co-relation queries the response was YES. [2023-11-23 22:38:50,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4402 conditions, 1383 events. 953/1383 cut-off events. For 1336/1336 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5158 event pairs, 257 based on Foata normal form. 8/1391 useless extension candidates. Maximal degree in co-relation 2476. Up to 504 conditions per place. [2023-11-23 22:38:50,044 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 102 selfloop transitions, 21 changer transitions 0/124 dead transitions. [2023-11-23 22:38:50,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 124 transitions, 748 flow [2023-11-23 22:38:50,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:38:50,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-23 22:38:50,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2023-11-23 22:38:50,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-23 22:38:50,048 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 135 transitions. [2023-11-23 22:38:50,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 135 transitions. [2023-11-23 22:38:50,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:38:50,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 135 transitions. [2023-11-23 22:38:50,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:50,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 27.0) internal successors, (243), 9 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:50,051 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 27.0) internal successors, (243), 9 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:50,051 INFO L175 Difference]: Start difference. First operand has 36 places, 42 transitions, 202 flow. Second operand 8 states and 135 transitions. [2023-11-23 22:38:50,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 124 transitions, 748 flow [2023-11-23 22:38:50,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 124 transitions, 726 flow, removed 11 selfloop flow, removed 0 redundant places. [2023-11-23 22:38:50,062 INFO L231 Difference]: Finished difference. Result has 47 places, 56 transitions, 335 flow [2023-11-23 22:38:50,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=335, PETRI_PLACES=47, PETRI_TRANSITIONS=56} [2023-11-23 22:38:50,063 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2023-11-23 22:38:50,063 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 56 transitions, 335 flow [2023-11-23 22:38:50,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:50,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:38:50,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:38:50,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:38:50,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:38:50,281 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:38:50,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:50,281 INFO L85 PathProgramCache]: Analyzing trace with hash -2068378681, now seen corresponding path program 3 times [2023-11-23 22:38:50,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:38:50,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996232884] [2023-11-23 22:38:50,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:50,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:38:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:50,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:38:50,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996232884] [2023-11-23 22:38:50,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996232884] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:38:50,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:38:50,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 22:38:50,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551956092] [2023-11-23 22:38:50,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:38:50,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:38:50,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:38:50,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:38:50,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:38:50,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-23 22:38:50,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 56 transitions, 335 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2023-11-23 22:38:50,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:38:50,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-23 22:38:50,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:38:51,029 INFO L124 PetriNetUnfolderBase]: 1156/1652 cut-off events. [2023-11-23 22:38:51,029 INFO L125 PetriNetUnfolderBase]: For 4319/4319 co-relation queries the response was YES. [2023-11-23 22:38:51,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6593 conditions, 1652 events. 1156/1652 cut-off events. For 4319/4319 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6210 event pairs, 423 based on Foata normal form. 2/1654 useless extension candidates. Maximal degree in co-relation 4247. Up to 1230 conditions per place. [2023-11-23 22:38:51,051 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 70 selfloop transitions, 28 changer transitions 3/102 dead transitions. [2023-11-23 22:38:51,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 102 transitions, 790 flow [2023-11-23 22:38:51,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:38:51,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-23 22:38:51,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2023-11-23 22:38:51,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2023-11-23 22:38:51,053 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 89 transitions. [2023-11-23 22:38:51,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 89 transitions. [2023-11-23 22:38:51,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:38:51,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 89 transitions. [2023-11-23 22:38:51,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:51,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:51,056 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:51,056 INFO L175 Difference]: Start difference. First operand has 47 places, 56 transitions, 335 flow. Second operand 7 states and 89 transitions. [2023-11-23 22:38:51,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 102 transitions, 790 flow [2023-11-23 22:38:51,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 102 transitions, 770 flow, removed 10 selfloop flow, removed 0 redundant places. [2023-11-23 22:38:51,090 INFO L231 Difference]: Finished difference. Result has 56 places, 72 transitions, 533 flow [2023-11-23 22:38:51,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=533, PETRI_PLACES=56, PETRI_TRANSITIONS=72} [2023-11-23 22:38:51,095 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2023-11-23 22:38:51,096 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 72 transitions, 533 flow [2023-11-23 22:38:51,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2023-11-23 22:38:51,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:38:51,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:38:51,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 22:38:51,097 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:38:51,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:51,098 INFO L85 PathProgramCache]: Analyzing trace with hash 107258399, now seen corresponding path program 4 times [2023-11-23 22:38:51,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:38:51,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964329512] [2023-11-23 22:38:51,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:51,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:38:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:51,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:38:51,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964329512] [2023-11-23 22:38:51,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964329512] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:38:51,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801339305] [2023-11-23 22:38:51,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 22:38:51,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:38:51,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:38:51,405 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:38:51,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:38:51,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 22:38:51,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:38:51,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 22:38:51,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:38:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:51,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:38:52,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:52,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801339305] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:38:52,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:38:52,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2023-11-23 22:38:52,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119718900] [2023-11-23 22:38:52,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:38:52,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-23 22:38:52,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:38:52,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-23 22:38:52,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2023-11-23 22:38:52,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-23 22:38:52,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 72 transitions, 533 flow. Second operand has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 19 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:52,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:38:52,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-23 22:38:52,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:38:54,403 INFO L124 PetriNetUnfolderBase]: 1849/2801 cut-off events. [2023-11-23 22:38:54,404 INFO L125 PetriNetUnfolderBase]: For 9619/9619 co-relation queries the response was YES. [2023-11-23 22:38:54,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12262 conditions, 2801 events. 1849/2801 cut-off events. For 9619/9619 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13063 event pairs, 234 based on Foata normal form. 26/2827 useless extension candidates. Maximal degree in co-relation 7742. Up to 927 conditions per place. [2023-11-23 22:38:54,448 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 229 selfloop transitions, 85 changer transitions 0/315 dead transitions. [2023-11-23 22:38:54,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 315 transitions, 2403 flow [2023-11-23 22:38:54,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-23 22:38:54,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-23 22:38:54,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 345 transitions. [2023-11-23 22:38:54,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2023-11-23 22:38:54,454 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 345 transitions. [2023-11-23 22:38:54,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 345 transitions. [2023-11-23 22:38:54,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:38:54,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 345 transitions. [2023-11-23 22:38:54,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 13.8) internal successors, (345), 25 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:54,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 27.0) internal successors, (702), 26 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:54,461 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 27.0) internal successors, (702), 26 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:54,461 INFO L175 Difference]: Start difference. First operand has 56 places, 72 transitions, 533 flow. Second operand 25 states and 345 transitions. [2023-11-23 22:38:54,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 315 transitions, 2403 flow [2023-11-23 22:38:54,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 315 transitions, 2317 flow, removed 43 selfloop flow, removed 0 redundant places. [2023-11-23 22:38:54,560 INFO L231 Difference]: Finished difference. Result has 98 places, 128 transitions, 1267 flow [2023-11-23 22:38:54,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1267, PETRI_PLACES=98, PETRI_TRANSITIONS=128} [2023-11-23 22:38:54,563 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 68 predicate places. [2023-11-23 22:38:54,564 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 128 transitions, 1267 flow [2023-11-23 22:38:54,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 19 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:54,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:38:54,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:38:54,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:38:54,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:38:54,781 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:38:54,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:54,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1975965718, now seen corresponding path program 1 times [2023-11-23 22:38:54,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:38:54,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301891022] [2023-11-23 22:38:54,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:54,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:38:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:55,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:55,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:38:55,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301891022] [2023-11-23 22:38:55,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301891022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:38:55,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:38:55,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 22:38:55,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722090947] [2023-11-23 22:38:55,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:38:55,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:38:55,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:38:55,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:38:55,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:38:55,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-23 22:38:55,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 128 transitions, 1267 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2023-11-23 22:38:55,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:38:55,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-23 22:38:55,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:38:55,914 INFO L124 PetriNetUnfolderBase]: 1950/2981 cut-off events. [2023-11-23 22:38:55,915 INFO L125 PetriNetUnfolderBase]: For 27187/27187 co-relation queries the response was YES. [2023-11-23 22:38:55,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16919 conditions, 2981 events. 1950/2981 cut-off events. For 27187/27187 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14342 event pairs, 637 based on Foata normal form. 16/2997 useless extension candidates. Maximal degree in co-relation 13854. Up to 1777 conditions per place. [2023-11-23 22:38:55,962 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 166 selfloop transitions, 41 changer transitions 6/214 dead transitions. [2023-11-23 22:38:55,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 214 transitions, 2373 flow [2023-11-23 22:38:55,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:38:55,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-23 22:38:55,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2023-11-23 22:38:55,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-11-23 22:38:55,964 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 105 transitions. [2023-11-23 22:38:55,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 105 transitions. [2023-11-23 22:38:55,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:38:55,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 105 transitions. [2023-11-23 22:38:55,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2023-11-23 22:38:55,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:55,967 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:55,967 INFO L175 Difference]: Start difference. First operand has 98 places, 128 transitions, 1267 flow. Second operand 7 states and 105 transitions. [2023-11-23 22:38:55,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 214 transitions, 2373 flow [2023-11-23 22:38:56,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 214 transitions, 2246 flow, removed 63 selfloop flow, removed 1 redundant places. [2023-11-23 22:38:56,055 INFO L231 Difference]: Finished difference. Result has 107 places, 136 transitions, 1398 flow [2023-11-23 22:38:56,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1164, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1398, PETRI_PLACES=107, PETRI_TRANSITIONS=136} [2023-11-23 22:38:56,056 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 77 predicate places. [2023-11-23 22:38:56,056 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 136 transitions, 1398 flow [2023-11-23 22:38:56,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2023-11-23 22:38:56,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:38:56,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:38:56,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 22:38:56,058 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:38:56,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:56,058 INFO L85 PathProgramCache]: Analyzing trace with hash -422911799, now seen corresponding path program 5 times [2023-11-23 22:38:56,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:38:56,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953545890] [2023-11-23 22:38:56,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:56,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:38:56,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:56,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:56,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:38:56,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953545890] [2023-11-23 22:38:56,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953545890] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:38:56,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837211224] [2023-11-23 22:38:56,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 22:38:56,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:38:56,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:38:56,285 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:38:56,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:38:56,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:38:56,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:38:56,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 22:38:56,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:38:56,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:56,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:38:56,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:56,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837211224] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 22:38:56,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:38:56,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 11 [2023-11-23 22:38:56,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575103190] [2023-11-23 22:38:56,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:38:56,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:38:56,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:38:56,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:38:56,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:38:56,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-23 22:38:56,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 136 transitions, 1398 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:56,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:38:56,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-23 22:38:56,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:38:57,564 INFO L124 PetriNetUnfolderBase]: 1989/3038 cut-off events. [2023-11-23 22:38:57,564 INFO L125 PetriNetUnfolderBase]: For 34625/34625 co-relation queries the response was YES. [2023-11-23 22:38:57,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18061 conditions, 3038 events. 1989/3038 cut-off events. For 34625/34625 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14346 event pairs, 736 based on Foata normal form. 16/3054 useless extension candidates. Maximal degree in co-relation 17215. Up to 1479 conditions per place. [2023-11-23 22:38:57,619 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 155 selfloop transitions, 30 changer transitions 0/186 dead transitions. [2023-11-23 22:38:57,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 186 transitions, 2144 flow [2023-11-23 22:38:57,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:38:57,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:38:57,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2023-11-23 22:38:57,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5864197530864198 [2023-11-23 22:38:57,622 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 95 transitions. [2023-11-23 22:38:57,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 95 transitions. [2023-11-23 22:38:57,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:38:57,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 95 transitions. [2023-11-23 22:38:57,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:57,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 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) [2023-11-23 22:38:57,625 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 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) [2023-11-23 22:38:57,625 INFO L175 Difference]: Start difference. First operand has 107 places, 136 transitions, 1398 flow. Second operand 6 states and 95 transitions. [2023-11-23 22:38:57,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 186 transitions, 2144 flow [2023-11-23 22:38:57,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 186 transitions, 2032 flow, removed 28 selfloop flow, removed 3 redundant places. [2023-11-23 22:38:57,753 INFO L231 Difference]: Finished difference. Result has 111 places, 143 transitions, 1467 flow [2023-11-23 22:38:57,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1467, PETRI_PLACES=111, PETRI_TRANSITIONS=143} [2023-11-23 22:38:57,755 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 81 predicate places. [2023-11-23 22:38:57,755 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 143 transitions, 1467 flow [2023-11-23 22:38:57,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:57,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:38:57,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:38:57,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:38:57,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 22:38:57,976 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:38:57,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:57,977 INFO L85 PathProgramCache]: Analyzing trace with hash -789043706, now seen corresponding path program 2 times [2023-11-23 22:38:57,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:38:57,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598127459] [2023-11-23 22:38:57,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:57,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:38:58,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:58,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:38:58,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598127459] [2023-11-23 22:38:58,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598127459] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:38:58,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793591607] [2023-11-23 22:38:58,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:38:58,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:38:58,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:38:58,260 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:38:58,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:38:58,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:38:58,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:38:58,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 22:38:58,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:38:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:58,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:38:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:58,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793591607] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:38:58,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:38:58,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-23 22:38:58,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601115791] [2023-11-23 22:38:58,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:38:58,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 22:38:58,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:38:58,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 22:38:58,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-23 22:38:58,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-23 22:38:58,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 143 transitions, 1467 flow. Second operand has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:58,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:38:58,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-23 22:38:58,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:38:59,831 INFO L124 PetriNetUnfolderBase]: 2220/3349 cut-off events. [2023-11-23 22:38:59,831 INFO L125 PetriNetUnfolderBase]: For 42149/42149 co-relation queries the response was YES. [2023-11-23 22:38:59,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20511 conditions, 3349 events. 2220/3349 cut-off events. For 42149/42149 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 15913 event pairs, 920 based on Foata normal form. 20/3369 useless extension candidates. Maximal degree in co-relation 19573. Up to 2746 conditions per place. [2023-11-23 22:38:59,929 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 154 selfloop transitions, 80 changer transitions 0/235 dead transitions. [2023-11-23 22:38:59,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 235 transitions, 2853 flow [2023-11-23 22:38:59,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:38:59,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-23 22:38:59,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 97 transitions. [2023-11-23 22:38:59,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132275132275133 [2023-11-23 22:38:59,931 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 97 transitions. [2023-11-23 22:38:59,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 97 transitions. [2023-11-23 22:38:59,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:38:59,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 97 transitions. [2023-11-23 22:38:59,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:59,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:59,933 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:59,933 INFO L175 Difference]: Start difference. First operand has 111 places, 143 transitions, 1467 flow. Second operand 7 states and 97 transitions. [2023-11-23 22:38:59,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 235 transitions, 2853 flow [2023-11-23 22:39:00,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 235 transitions, 2790 flow, removed 19 selfloop flow, removed 1 redundant places. [2023-11-23 22:39:00,100 INFO L231 Difference]: Finished difference. Result has 120 places, 191 transitions, 2343 flow [2023-11-23 22:39:00,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2343, PETRI_PLACES=120, PETRI_TRANSITIONS=191} [2023-11-23 22:39:00,103 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 90 predicate places. [2023-11-23 22:39:00,103 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 191 transitions, 2343 flow [2023-11-23 22:39:00,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:00,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:39:00,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:39:00,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:39:00,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:00,317 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:39:00,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:00,318 INFO L85 PathProgramCache]: Analyzing trace with hash -2099622920, now seen corresponding path program 3 times [2023-11-23 22:39:00,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:39:00,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411597206] [2023-11-23 22:39:00,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:00,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:39:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:00,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:39:00,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411597206] [2023-11-23 22:39:00,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411597206] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:39:00,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749855285] [2023-11-23 22:39:00,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 22:39:00,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:00,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:39:00,533 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:39:00,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:39:00,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 22:39:00,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:39:00,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 22:39:00,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:39:00,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:00,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:39:01,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:01,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749855285] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 22:39:01,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:39:01,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 16 [2023-11-23 22:39:01,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309671279] [2023-11-23 22:39:01,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:39:01,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:39:01,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:39:01,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:39:01,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2023-11-23 22:39:01,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-23 22:39:01,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 191 transitions, 2343 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:01,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:39:01,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-23 22:39:01,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:39:02,164 INFO L124 PetriNetUnfolderBase]: 2585/3846 cut-off events. [2023-11-23 22:39:02,165 INFO L125 PetriNetUnfolderBase]: For 55355/55355 co-relation queries the response was YES. [2023-11-23 22:39:02,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25717 conditions, 3846 events. 2585/3846 cut-off events. For 55355/55355 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 18524 event pairs, 567 based on Foata normal form. 20/3866 useless extension candidates. Maximal degree in co-relation 24775. Up to 1847 conditions per place. [2023-11-23 22:39:02,217 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 228 selfloop transitions, 54 changer transitions 1/284 dead transitions. [2023-11-23 22:39:02,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 284 transitions, 3982 flow [2023-11-23 22:39:02,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:39:02,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:39:02,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2023-11-23 22:39:02,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5617283950617284 [2023-11-23 22:39:02,219 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 91 transitions. [2023-11-23 22:39:02,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 91 transitions. [2023-11-23 22:39:02,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:39:02,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 91 transitions. [2023-11-23 22:39:02,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:02,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 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) [2023-11-23 22:39:02,221 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 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) [2023-11-23 22:39:02,221 INFO L175 Difference]: Start difference. First operand has 120 places, 191 transitions, 2343 flow. Second operand 6 states and 91 transitions. [2023-11-23 22:39:02,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 284 transitions, 3982 flow [2023-11-23 22:39:02,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 284 transitions, 3634 flow, removed 174 selfloop flow, removed 0 redundant places. [2023-11-23 22:39:02,580 INFO L231 Difference]: Finished difference. Result has 129 places, 230 transitions, 2907 flow [2023-11-23 22:39:02,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=2149, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2907, PETRI_PLACES=129, PETRI_TRANSITIONS=230} [2023-11-23 22:39:02,581 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 99 predicate places. [2023-11-23 22:39:02,582 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 230 transitions, 2907 flow [2023-11-23 22:39:02,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:02,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:39:02,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:39:02,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-23 22:39:02,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:02,789 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:39:02,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:02,790 INFO L85 PathProgramCache]: Analyzing trace with hash -270746641, now seen corresponding path program 1 times [2023-11-23 22:39:02,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:39:02,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556860469] [2023-11-23 22:39:02,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:02,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:39:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:03,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:03,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:39:03,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556860469] [2023-11-23 22:39:03,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556860469] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:39:03,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:39:03,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 22:39:03,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178975079] [2023-11-23 22:39:03,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:39:03,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:39:03,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:39:03,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:39:03,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:39:03,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-23 22:39:03,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 230 transitions, 2907 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2023-11-23 22:39:03,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:39:03,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-23 22:39:03,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:39:04,289 INFO L124 PetriNetUnfolderBase]: 2605/3876 cut-off events. [2023-11-23 22:39:04,289 INFO L125 PetriNetUnfolderBase]: For 57623/57623 co-relation queries the response was YES. [2023-11-23 22:39:04,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26126 conditions, 3876 events. 2605/3876 cut-off events. For 57623/57623 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 18645 event pairs, 644 based on Foata normal form. 6/3882 useless extension candidates. Maximal degree in co-relation 25131. Up to 2748 conditions per place. [2023-11-23 22:39:04,337 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 164 selfloop transitions, 151 changer transitions 7/323 dead transitions. [2023-11-23 22:39:04,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 323 transitions, 4633 flow [2023-11-23 22:39:04,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:39:04,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-23 22:39:04,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2023-11-23 22:39:04,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2023-11-23 22:39:04,339 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 95 transitions. [2023-11-23 22:39:04,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 95 transitions. [2023-11-23 22:39:04,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:39:04,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 95 transitions. [2023-11-23 22:39:04,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:04,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:04,341 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:04,341 INFO L175 Difference]: Start difference. First operand has 129 places, 230 transitions, 2907 flow. Second operand 7 states and 95 transitions. [2023-11-23 22:39:04,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 323 transitions, 4633 flow [2023-11-23 22:39:04,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 323 transitions, 4496 flow, removed 58 selfloop flow, removed 1 redundant places. [2023-11-23 22:39:04,768 INFO L231 Difference]: Finished difference. Result has 138 places, 264 transitions, 3873 flow [2023-11-23 22:39:04,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=2787, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3873, PETRI_PLACES=138, PETRI_TRANSITIONS=264} [2023-11-23 22:39:04,769 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 108 predicate places. [2023-11-23 22:39:04,770 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 264 transitions, 3873 flow [2023-11-23 22:39:04,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2023-11-23 22:39:04,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:39:04,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:39:04,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 22:39:04,771 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:39:04,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:04,771 INFO L85 PathProgramCache]: Analyzing trace with hash 131229350, now seen corresponding path program 4 times [2023-11-23 22:39:04,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:39:04,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997962095] [2023-11-23 22:39:04,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:04,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:39:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:05,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:05,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:39:05,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997962095] [2023-11-23 22:39:05,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997962095] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:39:05,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:39:05,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 22:39:05,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296601175] [2023-11-23 22:39:05,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:39:05,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:39:05,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:39:05,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:39:05,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:39:05,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-23 22:39:05,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 264 transitions, 3873 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2023-11-23 22:39:05,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:39:05,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-23 22:39:05,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:39:06,546 INFO L124 PetriNetUnfolderBase]: 2800/4167 cut-off events. [2023-11-23 22:39:06,546 INFO L125 PetriNetUnfolderBase]: For 62697/62697 co-relation queries the response was YES. [2023-11-23 22:39:06,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29822 conditions, 4167 events. 2800/4167 cut-off events. For 62697/62697 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 20332 event pairs, 704 based on Foata normal form. 22/4189 useless extension candidates. Maximal degree in co-relation 29219. Up to 1834 conditions per place. [2023-11-23 22:39:06,604 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 268 selfloop transitions, 114 changer transitions 2/385 dead transitions. [2023-11-23 22:39:06,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 385 transitions, 6104 flow [2023-11-23 22:39:06,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 22:39:06,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-23 22:39:06,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 146 transitions. [2023-11-23 22:39:06,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5407407407407407 [2023-11-23 22:39:06,606 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 146 transitions. [2023-11-23 22:39:06,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 146 transitions. [2023-11-23 22:39:06,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:39:06,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 146 transitions. [2023-11-23 22:39:06,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:06,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 27.0) internal successors, (297), 11 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:06,609 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 27.0) internal successors, (297), 11 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:06,609 INFO L175 Difference]: Start difference. First operand has 138 places, 264 transitions, 3873 flow. Second operand 10 states and 146 transitions. [2023-11-23 22:39:06,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 385 transitions, 6104 flow [2023-11-23 22:39:06,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 385 transitions, 5726 flow, removed 189 selfloop flow, removed 0 redundant places. [2023-11-23 22:39:06,927 INFO L231 Difference]: Finished difference. Result has 152 places, 310 transitions, 4740 flow [2023-11-23 22:39:06,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=3629, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4740, PETRI_PLACES=152, PETRI_TRANSITIONS=310} [2023-11-23 22:39:06,928 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 122 predicate places. [2023-11-23 22:39:06,929 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 310 transitions, 4740 flow [2023-11-23 22:39:06,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2023-11-23 22:39:06,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:39:06,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:39:06,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 22:39:06,929 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:39:06,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:06,930 INFO L85 PathProgramCache]: Analyzing trace with hash -46138025, now seen corresponding path program 6 times [2023-11-23 22:39:06,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:39:06,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024653045] [2023-11-23 22:39:06,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:06,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:39:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:07,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:39:07,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024653045] [2023-11-23 22:39:07,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024653045] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:39:07,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736595102] [2023-11-23 22:39:07,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 22:39:07,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:07,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:39:07,209 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:39:07,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:39:07,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-23 22:39:07,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:39:07,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-23 22:39:07,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:39:07,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:07,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:39:07,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:07,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736595102] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:39:07,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:39:07,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2023-11-23 22:39:07,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371845748] [2023-11-23 22:39:07,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:39:07,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 22:39:07,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:39:07,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 22:39:07,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-23 22:39:07,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-23 22:39:07,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 310 transitions, 4740 flow. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:07,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:39:07,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-23 22:39:07,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:39:09,733 INFO L124 PetriNetUnfolderBase]: 3004/4596 cut-off events. [2023-11-23 22:39:09,734 INFO L125 PetriNetUnfolderBase]: For 64839/64839 co-relation queries the response was YES. [2023-11-23 22:39:09,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32409 conditions, 4596 events. 3004/4596 cut-off events. For 64839/64839 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 24007 event pairs, 275 based on Foata normal form. 34/4630 useless extension candidates. Maximal degree in co-relation 31643. Up to 1586 conditions per place. [2023-11-23 22:39:09,783 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 282 selfloop transitions, 233 changer transitions 7/523 dead transitions. [2023-11-23 22:39:09,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 523 transitions, 8289 flow [2023-11-23 22:39:09,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 22:39:09,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-23 22:39:09,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 199 transitions. [2023-11-23 22:39:09,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49135802469135803 [2023-11-23 22:39:09,790 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 199 transitions. [2023-11-23 22:39:09,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 199 transitions. [2023-11-23 22:39:09,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:39:09,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 199 transitions. [2023-11-23 22:39:09,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 13.266666666666667) internal successors, (199), 15 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:09,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 27.0) internal successors, (432), 16 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:09,795 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 27.0) internal successors, (432), 16 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:09,795 INFO L175 Difference]: Start difference. First operand has 152 places, 310 transitions, 4740 flow. Second operand 15 states and 199 transitions. [2023-11-23 22:39:09,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 523 transitions, 8289 flow [2023-11-23 22:39:10,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 523 transitions, 7979 flow, removed 110 selfloop flow, removed 1 redundant places. [2023-11-23 22:39:10,180 INFO L231 Difference]: Finished difference. Result has 177 places, 376 transitions, 6456 flow [2023-11-23 22:39:10,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=4521, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6456, PETRI_PLACES=177, PETRI_TRANSITIONS=376} [2023-11-23 22:39:10,181 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 147 predicate places. [2023-11-23 22:39:10,181 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 376 transitions, 6456 flow [2023-11-23 22:39:10,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:10,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:39:10,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:39:10,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-23 22:39:10,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:10,383 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:39:10,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:10,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1807537153, now seen corresponding path program 7 times [2023-11-23 22:39:10,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:39:10,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669967947] [2023-11-23 22:39:10,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:10,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:39:10,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:10,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:10,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:39:10,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669967947] [2023-11-23 22:39:10,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669967947] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:39:10,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566091703] [2023-11-23 22:39:10,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 22:39:10,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:10,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:39:10,582 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:39:10,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 22:39:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:10,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 22:39:10,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:39:10,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:10,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:39:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:11,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566091703] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 22:39:11,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:39:11,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 11 [2023-11-23 22:39:11,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687595684] [2023-11-23 22:39:11,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:39:11,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:39:11,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:39:11,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:39:11,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:39:11,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-23 22:39:11,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 376 transitions, 6456 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:11,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:39:11,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-23 22:39:11,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:39:12,461 INFO L124 PetriNetUnfolderBase]: 3305/4996 cut-off events. [2023-11-23 22:39:12,461 INFO L125 PetriNetUnfolderBase]: For 96736/96736 co-relation queries the response was YES. [2023-11-23 22:39:12,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39210 conditions, 4996 events. 3305/4996 cut-off events. For 96736/96736 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 25878 event pairs, 821 based on Foata normal form. 16/5012 useless extension candidates. Maximal degree in co-relation 38389. Up to 2297 conditions per place. [2023-11-23 22:39:12,533 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 348 selfloop transitions, 102 changer transitions 0/451 dead transitions. [2023-11-23 22:39:12,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 451 transitions, 8321 flow [2023-11-23 22:39:12,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:39:12,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:39:12,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2023-11-23 22:39:12,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5864197530864198 [2023-11-23 22:39:12,535 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 95 transitions. [2023-11-23 22:39:12,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 95 transitions. [2023-11-23 22:39:12,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:39:12,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 95 transitions. [2023-11-23 22:39:12,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:12,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 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) [2023-11-23 22:39:12,538 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 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) [2023-11-23 22:39:12,538 INFO L175 Difference]: Start difference. First operand has 177 places, 376 transitions, 6456 flow. Second operand 6 states and 95 transitions. [2023-11-23 22:39:12,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 451 transitions, 8321 flow [2023-11-23 22:39:13,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 451 transitions, 8007 flow, removed 112 selfloop flow, removed 1 redundant places. [2023-11-23 22:39:13,169 INFO L231 Difference]: Finished difference. Result has 185 places, 401 transitions, 7088 flow [2023-11-23 22:39:13,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6198, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7088, PETRI_PLACES=185, PETRI_TRANSITIONS=401} [2023-11-23 22:39:13,170 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 155 predicate places. [2023-11-23 22:39:13,170 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 401 transitions, 7088 flow [2023-11-23 22:39:13,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:13,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:39:13,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:39:13,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-23 22:39:13,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:13,372 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:39:13,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:13,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1813377698, now seen corresponding path program 5 times [2023-11-23 22:39:13,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:39:13,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231359200] [2023-11-23 22:39:13,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:13,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:39:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:13,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:39:13,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231359200] [2023-11-23 22:39:13,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231359200] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:39:13,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700481621] [2023-11-23 22:39:13,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 22:39:13,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:13,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:39:13,583 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:39:13,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 22:39:13,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:39:13,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:39:13,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 22:39:13,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:39:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:13,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:39:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:13,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700481621] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 22:39:13,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:39:13,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 10 [2023-11-23 22:39:13,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587129168] [2023-11-23 22:39:13,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:39:13,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:39:13,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:39:13,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:39:13,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:39:13,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-23 22:39:13,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 401 transitions, 7088 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:13,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:39:13,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-23 22:39:13,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:39:15,434 INFO L124 PetriNetUnfolderBase]: 3530/5295 cut-off events. [2023-11-23 22:39:15,434 INFO L125 PetriNetUnfolderBase]: For 100820/100820 co-relation queries the response was YES. [2023-11-23 22:39:15,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41958 conditions, 5295 events. 3530/5295 cut-off events. For 100820/100820 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 27294 event pairs, 750 based on Foata normal form. 10/5305 useless extension candidates. Maximal degree in co-relation 41279. Up to 2798 conditions per place. [2023-11-23 22:39:15,507 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 376 selfloop transitions, 87 changer transitions 0/464 dead transitions. [2023-11-23 22:39:15,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 464 transitions, 8805 flow [2023-11-23 22:39:15,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:39:15,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:39:15,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 85 transitions. [2023-11-23 22:39:15,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5246913580246914 [2023-11-23 22:39:15,509 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 85 transitions. [2023-11-23 22:39:15,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 85 transitions. [2023-11-23 22:39:15,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:39:15,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 85 transitions. [2023-11-23 22:39:15,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:15,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 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) [2023-11-23 22:39:15,510 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 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) [2023-11-23 22:39:15,511 INFO L175 Difference]: Start difference. First operand has 185 places, 401 transitions, 7088 flow. Second operand 6 states and 85 transitions. [2023-11-23 22:39:15,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 464 transitions, 8805 flow [2023-11-23 22:39:16,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 464 transitions, 8649 flow, removed 43 selfloop flow, removed 2 redundant places. [2023-11-23 22:39:16,090 INFO L231 Difference]: Finished difference. Result has 192 places, 418 transitions, 7632 flow [2023-11-23 22:39:16,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6944, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7632, PETRI_PLACES=192, PETRI_TRANSITIONS=418} [2023-11-23 22:39:16,091 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 162 predicate places. [2023-11-23 22:39:16,091 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 418 transitions, 7632 flow [2023-11-23 22:39:16,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:16,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:39:16,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:39:16,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-23 22:39:16,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:16,292 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:39:16,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:16,293 INFO L85 PathProgramCache]: Analyzing trace with hash 662984396, now seen corresponding path program 6 times [2023-11-23 22:39:16,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:39:16,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172519993] [2023-11-23 22:39:16,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:16,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:39:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:16,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:39:16,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172519993] [2023-11-23 22:39:16,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172519993] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:39:16,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177018972] [2023-11-23 22:39:16,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 22:39:16,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:16,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:39:16,590 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:39:16,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 22:39:16,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-23 22:39:16,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:39:16,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-23 22:39:16,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:39:16,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:16,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:39:17,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:17,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177018972] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:39:17,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:39:17,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2023-11-23 22:39:17,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995913498] [2023-11-23 22:39:17,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:39:17,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 22:39:17,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:39:17,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 22:39:17,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-23 22:39:17,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-23 22:39:17,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 418 transitions, 7632 flow. Second operand has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:17,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:39:17,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-23 22:39:17,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:39:20,848 INFO L124 PetriNetUnfolderBase]: 5389/8152 cut-off events. [2023-11-23 22:39:20,848 INFO L125 PetriNetUnfolderBase]: For 162568/162568 co-relation queries the response was YES. [2023-11-23 22:39:20,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64213 conditions, 8152 events. 5389/8152 cut-off events. For 162568/162568 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 46719 event pairs, 530 based on Foata normal form. 44/8196 useless extension candidates. Maximal degree in co-relation 63143. Up to 2920 conditions per place. [2023-11-23 22:39:20,948 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 446 selfloop transitions, 389 changer transitions 1/837 dead transitions. [2023-11-23 22:39:20,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 837 transitions, 15153 flow [2023-11-23 22:39:20,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-23 22:39:20,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-23 22:39:20,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 327 transitions. [2023-11-23 22:39:20,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505050505050505 [2023-11-23 22:39:20,951 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 327 transitions. [2023-11-23 22:39:20,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 327 transitions. [2023-11-23 22:39:20,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:39:20,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 327 transitions. [2023-11-23 22:39:20,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 14.863636363636363) internal successors, (327), 22 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:20,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 27.0) internal successors, (621), 23 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:20,955 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 27.0) internal successors, (621), 23 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:20,955 INFO L175 Difference]: Start difference. First operand has 192 places, 418 transitions, 7632 flow. Second operand 22 states and 327 transitions. [2023-11-23 22:39:20,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 837 transitions, 15153 flow [2023-11-23 22:39:21,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 837 transitions, 14988 flow, removed 34 selfloop flow, removed 1 redundant places. [2023-11-23 22:39:21,852 INFO L231 Difference]: Finished difference. Result has 228 places, 557 transitions, 11568 flow [2023-11-23 22:39:21,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7549, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=11568, PETRI_PLACES=228, PETRI_TRANSITIONS=557} [2023-11-23 22:39:21,853 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 198 predicate places. [2023-11-23 22:39:21,853 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 557 transitions, 11568 flow [2023-11-23 22:39:21,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:21,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:39:21,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:39:21,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 22:39:22,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 22:39:22,055 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:39:22,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:22,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1376887323, now seen corresponding path program 8 times [2023-11-23 22:39:22,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:39:22,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069687862] [2023-11-23 22:39:22,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:22,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:39:22,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:22,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:39:22,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069687862] [2023-11-23 22:39:22,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069687862] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:39:22,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:39:22,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 22:39:22,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790686555] [2023-11-23 22:39:22,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:39:22,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:39:22,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:39:22,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:39:22,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:39:22,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-23 22:39:22,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 557 transitions, 11568 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2023-11-23 22:39:22,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:39:22,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-23 22:39:22,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:39:25,319 INFO L124 PetriNetUnfolderBase]: 5609/8638 cut-off events. [2023-11-23 22:39:25,319 INFO L125 PetriNetUnfolderBase]: For 191969/191969 co-relation queries the response was YES. [2023-11-23 22:39:25,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74189 conditions, 8638 events. 5609/8638 cut-off events. For 191969/191969 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 51266 event pairs, 1016 based on Foata normal form. 22/8660 useless extension candidates. Maximal degree in co-relation 73395. Up to 3885 conditions per place. [2023-11-23 22:39:25,426 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 443 selfloop transitions, 213 changer transitions 0/657 dead transitions. [2023-11-23 22:39:25,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 657 transitions, 14219 flow [2023-11-23 22:39:25,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:39:25,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-23 22:39:25,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2023-11-23 22:39:25,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2023-11-23 22:39:25,428 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 111 transitions. [2023-11-23 22:39:25,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 111 transitions. [2023-11-23 22:39:25,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:39:25,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 111 transitions. [2023-11-23 22:39:25,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:25,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:25,430 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:25,431 INFO L175 Difference]: Start difference. First operand has 228 places, 557 transitions, 11568 flow. Second operand 7 states and 111 transitions. [2023-11-23 22:39:25,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 657 transitions, 14219 flow [2023-11-23 22:39:26,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 657 transitions, 13905 flow, removed 132 selfloop flow, removed 1 redundant places. [2023-11-23 22:39:26,682 INFO L231 Difference]: Finished difference. Result has 235 places, 564 transitions, 11957 flow [2023-11-23 22:39:26,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=11314, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11957, PETRI_PLACES=235, PETRI_TRANSITIONS=564} [2023-11-23 22:39:26,684 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 205 predicate places. [2023-11-23 22:39:26,684 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 564 transitions, 11957 flow [2023-11-23 22:39:26,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2023-11-23 22:39:26,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:39:26,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:39:26,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-23 22:39:26,685 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:39:26,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:26,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1000544963, now seen corresponding path program 9 times [2023-11-23 22:39:26,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:39:26,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483408023] [2023-11-23 22:39:26,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:26,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:39:26,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:26,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:39:26,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483408023] [2023-11-23 22:39:26,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483408023] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:39:26,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021254114] [2023-11-23 22:39:26,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 22:39:26,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:26,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:39:26,898 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:39:26,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9bb3d1-29c0-4c87-87dd-84c7777c4d83/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 22:39:27,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 22:39:27,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:39:27,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-23 22:39:27,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:39:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:27,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:39:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:27,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021254114] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 22:39:27,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:39:27,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 15 [2023-11-23 22:39:27,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540517393] [2023-11-23 22:39:27,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:39:27,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:39:27,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:39:27,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:39:27,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-23 22:39:27,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-23 22:39:27,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 564 transitions, 11957 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:27,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:39:27,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-23 22:39:27,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:39:30,309 INFO L124 PetriNetUnfolderBase]: 5579/8564 cut-off events. [2023-11-23 22:39:30,310 INFO L125 PetriNetUnfolderBase]: For 196393/196393 co-relation queries the response was YES. [2023-11-23 22:39:30,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73351 conditions, 8564 events. 5579/8564 cut-off events. For 196393/196393 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 50474 event pairs, 1377 based on Foata normal form. 22/8586 useless extension candidates. Maximal degree in co-relation 72579. Up to 4513 conditions per place.