./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3c66e95d4d33d89eed9ab2f285249dafeef639a3ca9f6d879b87b944d1b8c0ce --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:44:48,198 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:44:48,308 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:44:48,316 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:44:48,317 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:44:48,356 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:44:48,357 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:44:48,357 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:44:48,358 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:44:48,363 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:44:48,364 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:44:48,365 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:44:48,366 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:44:48,367 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:44:48,368 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:44:48,368 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:44:48,369 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:44:48,369 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:44:48,370 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:44:48,370 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:44:48,371 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:44:48,371 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:44:48,372 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:44:48,372 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:44:48,373 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:44:48,373 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:44:48,373 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:44:48,374 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:44:48,375 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:44:48,375 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:44:48,376 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:44:48,377 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:44:48,377 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:44:48,377 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:44:48,377 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:44:48,378 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:44:48,378 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:44:48,378 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:44:48,378 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:44:48,378 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:44:48,390 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:44:48,391 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:44:48,391 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_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c66e95d4d33d89eed9ab2f285249dafeef639a3ca9f6d879b87b944d1b8c0ce [2023-11-26 10:44:48,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:44:48,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:44:48,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:44:48,738 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:44:48,740 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:44:48,742 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2023-11-26 10:44:51,841 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:44:52,047 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:44:52,048 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2023-11-26 10:44:52,056 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/data/f0566b38f/fe863bd27a9646739bb44fdc0204c97c/FLAGd7b114faa [2023-11-26 10:44:52,427 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/data/f0566b38f/fe863bd27a9646739bb44fdc0204c97c [2023-11-26 10:44:52,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:44:52,431 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:44:52,433 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:44:52,433 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:44:52,439 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:44:52,440 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:44:52" (1/1) ... [2023-11-26 10:44:52,441 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e216949 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:52, skipping insertion in model container [2023-11-26 10:44:52,441 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:44:52" (1/1) ... [2023-11-26 10:44:52,464 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:44:52,630 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_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2113,2126] [2023-11-26 10:44:52,635 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:44:52,644 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:44:52,667 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_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2113,2126] [2023-11-26 10:44:52,668 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:44:52,678 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 10:44:52,678 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 10:44:52,686 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:44:52,686 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:52 WrapperNode [2023-11-26 10:44:52,687 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:44:52,688 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:44:52,688 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:44:52,688 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:44:52,696 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:52" (1/1) ... [2023-11-26 10:44:52,705 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:52" (1/1) ... [2023-11-26 10:44:52,728 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 79 [2023-11-26 10:44:52,729 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:44:52,730 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:44:52,730 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:44:52,730 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:44:52,742 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:52" (1/1) ... [2023-11-26 10:44:52,742 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:52" (1/1) ... [2023-11-26 10:44:52,745 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:52" (1/1) ... [2023-11-26 10:44:52,763 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-26 10:44:52,763 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:52" (1/1) ... [2023-11-26 10:44:52,764 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:52" (1/1) ... [2023-11-26 10:44:52,771 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:52" (1/1) ... [2023-11-26 10:44:52,775 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:52" (1/1) ... [2023-11-26 10:44:52,777 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:52" (1/1) ... [2023-11-26 10:44:52,779 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:52" (1/1) ... [2023-11-26 10:44:52,782 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:44:52,783 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:44:52,784 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:44:52,784 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:44:52,785 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:52" (1/1) ... [2023-11-26 10:44:52,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:44:52,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:52,833 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:44:52,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:44:52,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:44:52,903 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 10:44:52,903 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 10:44:52,903 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 10:44:52,904 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 10:44:52,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:44:52,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:44:52,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:44:52,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:44:52,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:44:52,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:44:52,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:44:52,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 10:44:52,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 10:44:52,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:44:52,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:44:52,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:44:52,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:44:52,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:44:52,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:44:52,914 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 10:44:53,101 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:44:53,115 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:44:53,458 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:44:53,721 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:44:53,722 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 10:44:53,722 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:44:53 BoogieIcfgContainer [2023-11-26 10:44:53,722 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:44:53,725 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:44:53,726 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:44:53,730 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:44:53,730 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:44:52" (1/3) ... [2023-11-26 10:44:53,731 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@683edfbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:44:53, skipping insertion in model container [2023-11-26 10:44:53,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:52" (2/3) ... [2023-11-26 10:44:53,732 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@683edfbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:44:53, skipping insertion in model container [2023-11-26 10:44:53,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:44:53" (3/3) ... [2023-11-26 10:44:53,733 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2023-11-26 10:44:53,744 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 10:44:53,756 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:44:53,757 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:44:53,757 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 10:44:53,815 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 10:44:53,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 23 transitions, 60 flow [2023-11-26 10:44:53,890 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2023-11-26 10:44:53,890 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 10:44:53,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 21 events. 2/21 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2023-11-26 10:44:53,893 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 23 transitions, 60 flow [2023-11-26 10:44:53,897 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 20 transitions, 52 flow [2023-11-26 10:44:53,908 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:44:53,915 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;@357499b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:44:53,915 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-26 10:44:53,927 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:44:53,928 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2023-11-26 10:44:53,928 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 10:44:53,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:53,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:53,930 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 10:44:53,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:53,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1109461626, now seen corresponding path program 1 times [2023-11-26 10:44:53,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:53,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862141345] [2023-11-26 10:44:53,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:53,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:54,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:44:54,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:54,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862141345] [2023-11-26 10:44:54,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862141345] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:54,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:54,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:44:54,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824920562] [2023-11-26 10:44:54,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:54,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:44:54,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:54,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:44:54,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:44:54,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2023-11-26 10:44:54,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 52 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) [2023-11-26 10:44:54,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:54,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2023-11-26 10:44:54,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:55,160 INFO L124 PetriNetUnfolderBase]: 84/187 cut-off events. [2023-11-26 10:44:55,160 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-11-26 10:44:55,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 187 events. 84/187 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 680 event pairs, 24 based on Foata normal form. 9/195 useless extension candidates. Maximal degree in co-relation 289. Up to 101 conditions per place. [2023-11-26 10:44:55,165 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 34 selfloop transitions, 8 changer transitions 5/50 dead transitions. [2023-11-26 10:44:55,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 50 transitions, 227 flow [2023-11-26 10:44:55,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:44:55,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 10:44:55,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2023-11-26 10:44:55,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2023-11-26 10:44:55,179 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 84 transitions. [2023-11-26 10:44:55,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 84 transitions. [2023-11-26 10:44:55,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:55,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 84 transitions. [2023-11-26 10:44:55,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:55,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:55,189 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:55,192 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 52 flow. Second operand 7 states and 84 transitions. [2023-11-26 10:44:55,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 50 transitions, 227 flow [2023-11-26 10:44:55,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 50 transitions, 205 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 10:44:55,199 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 99 flow [2023-11-26 10:44:55,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=99, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-11-26 10:44:55,205 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 7 predicate places. [2023-11-26 10:44:55,205 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 99 flow [2023-11-26 10:44:55,206 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) [2023-11-26 10:44:55,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:55,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:55,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:44:55,207 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 10:44:55,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:55,207 INFO L85 PathProgramCache]: Analyzing trace with hash 209559052, now seen corresponding path program 2 times [2023-11-26 10:44:55,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:55,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102711256] [2023-11-26 10:44:55,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:55,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:55,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:44:55,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:55,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102711256] [2023-11-26 10:44:55,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102711256] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:55,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:55,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:44:55,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098116368] [2023-11-26 10:44:55,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:55,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:44:55,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:55,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:44:55,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:44:55,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2023-11-26 10:44:55,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 99 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) [2023-11-26 10:44:55,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:55,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2023-11-26 10:44:55,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:55,946 INFO L124 PetriNetUnfolderBase]: 85/195 cut-off events. [2023-11-26 10:44:55,947 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2023-11-26 10:44:55,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504 conditions, 195 events. 85/195 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 748 event pairs, 20 based on Foata normal form. 1/196 useless extension candidates. Maximal degree in co-relation 488. Up to 101 conditions per place. [2023-11-26 10:44:55,951 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 31 selfloop transitions, 8 changer transitions 11/53 dead transitions. [2023-11-26 10:44:55,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 53 transitions, 283 flow [2023-11-26 10:44:55,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:44:55,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 10:44:55,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2023-11-26 10:44:55,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5093167701863354 [2023-11-26 10:44:55,954 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 82 transitions. [2023-11-26 10:44:55,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 82 transitions. [2023-11-26 10:44:55,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:55,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 82 transitions. [2023-11-26 10:44:55,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:55,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:55,958 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:55,959 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 99 flow. Second operand 7 states and 82 transitions. [2023-11-26 10:44:55,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 53 transitions, 283 flow [2023-11-26 10:44:55,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 53 transitions, 279 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-26 10:44:55,963 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 133 flow [2023-11-26 10:44:55,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=133, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2023-11-26 10:44:55,965 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 15 predicate places. [2023-11-26 10:44:55,965 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 133 flow [2023-11-26 10:44:55,965 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) [2023-11-26 10:44:55,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:55,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:55,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:44:55,967 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 10:44:55,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:55,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1557473824, now seen corresponding path program 3 times [2023-11-26 10:44:55,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:55,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942234174] [2023-11-26 10:44:55,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:55,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:56,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:44:56,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:56,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942234174] [2023-11-26 10:44:56,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942234174] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:56,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:56,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:44:56,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823527732] [2023-11-26 10:44:56,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:56,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:44:56,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:56,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:44:56,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:44:56,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2023-11-26 10:44:56,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 133 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) [2023-11-26 10:44:56,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:56,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2023-11-26 10:44:56,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:56,594 INFO L124 PetriNetUnfolderBase]: 86/190 cut-off events. [2023-11-26 10:44:56,595 INFO L125 PetriNetUnfolderBase]: For 222/222 co-relation queries the response was YES. [2023-11-26 10:44:56,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 190 events. 86/190 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 693 event pairs, 16 based on Foata normal form. 1/190 useless extension candidates. Maximal degree in co-relation 569. Up to 105 conditions per place. [2023-11-26 10:44:56,599 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 31 selfloop transitions, 12 changer transitions 5/51 dead transitions. [2023-11-26 10:44:56,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 324 flow [2023-11-26 10:44:56,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:44:56,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 10:44:56,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2023-11-26 10:44:56,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031055900621118 [2023-11-26 10:44:56,603 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 81 transitions. [2023-11-26 10:44:56,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 81 transitions. [2023-11-26 10:44:56,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:56,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 81 transitions. [2023-11-26 10:44:56,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:56,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:56,607 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:56,607 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 133 flow. Second operand 7 states and 81 transitions. [2023-11-26 10:44:56,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 324 flow [2023-11-26 10:44:56,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 51 transitions, 303 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-11-26 10:44:56,613 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 196 flow [2023-11-26 10:44:56,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=196, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2023-11-26 10:44:56,615 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 19 predicate places. [2023-11-26 10:44:56,615 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 196 flow [2023-11-26 10:44:56,616 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) [2023-11-26 10:44:56,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:56,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:56,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:44:56,617 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 10:44:56,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:56,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1151688448, now seen corresponding path program 4 times [2023-11-26 10:44:56,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:56,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828598292] [2023-11-26 10:44:56,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:56,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:56,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:44:56,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:56,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828598292] [2023-11-26 10:44:56,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828598292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:56,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:56,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:44:56,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996720863] [2023-11-26 10:44:56,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:56,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:44:56,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:56,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:44:56,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:44:56,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2023-11-26 10:44:56,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 196 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) [2023-11-26 10:44:56,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:56,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2023-11-26 10:44:56,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:57,233 INFO L124 PetriNetUnfolderBase]: 84/191 cut-off events. [2023-11-26 10:44:57,233 INFO L125 PetriNetUnfolderBase]: For 290/290 co-relation queries the response was YES. [2023-11-26 10:44:57,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 622 conditions, 191 events. 84/191 cut-off events. For 290/290 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 705 event pairs, 27 based on Foata normal form. 1/192 useless extension candidates. Maximal degree in co-relation 600. Up to 105 conditions per place. [2023-11-26 10:44:57,241 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 30 selfloop transitions, 14 changer transitions 6/53 dead transitions. [2023-11-26 10:44:57,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 53 transitions, 380 flow [2023-11-26 10:44:57,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:44:57,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 10:44:57,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2023-11-26 10:44:57,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968944099378882 [2023-11-26 10:44:57,247 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 80 transitions. [2023-11-26 10:44:57,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 80 transitions. [2023-11-26 10:44:57,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:57,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 80 transitions. [2023-11-26 10:44:57,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:57,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:57,255 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:57,255 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 196 flow. Second operand 7 states and 80 transitions. [2023-11-26 10:44:57,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 53 transitions, 380 flow [2023-11-26 10:44:57,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 358 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-26 10:44:57,266 INFO L231 Difference]: Finished difference. Result has 49 places, 35 transitions, 243 flow [2023-11-26 10:44:57,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=243, PETRI_PLACES=49, PETRI_TRANSITIONS=35} [2023-11-26 10:44:57,269 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 24 predicate places. [2023-11-26 10:44:57,270 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 35 transitions, 243 flow [2023-11-26 10:44:57,271 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) [2023-11-26 10:44:57,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:57,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:57,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:44:57,273 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 10:44:57,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:57,275 INFO L85 PathProgramCache]: Analyzing trace with hash -971384504, now seen corresponding path program 5 times [2023-11-26 10:44:57,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:57,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944950921] [2023-11-26 10:44:57,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:57,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:57,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:57,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:44:57,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:57,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944950921] [2023-11-26 10:44:57,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944950921] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:57,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:57,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:44:57,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620745116] [2023-11-26 10:44:57,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:57,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:44:57,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:57,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:44:57,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:44:57,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2023-11-26 10:44:57,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 35 transitions, 243 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) [2023-11-26 10:44:57,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:57,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2023-11-26 10:44:57,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:57,948 INFO L124 PetriNetUnfolderBase]: 82/187 cut-off events. [2023-11-26 10:44:57,948 INFO L125 PetriNetUnfolderBase]: For 350/350 co-relation queries the response was YES. [2023-11-26 10:44:57,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 187 events. 82/187 cut-off events. For 350/350 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 684 event pairs, 24 based on Foata normal form. 1/188 useless extension candidates. Maximal degree in co-relation 618. Up to 105 conditions per place. [2023-11-26 10:44:57,951 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 29 selfloop transitions, 13 changer transitions 9/54 dead transitions. [2023-11-26 10:44:57,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 54 transitions, 400 flow [2023-11-26 10:44:57,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:44:57,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 10:44:57,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2023-11-26 10:44:57,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031055900621118 [2023-11-26 10:44:57,954 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 81 transitions. [2023-11-26 10:44:57,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 81 transitions. [2023-11-26 10:44:57,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:57,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 81 transitions. [2023-11-26 10:44:57,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:57,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:57,956 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:57,957 INFO L175 Difference]: Start difference. First operand has 49 places, 35 transitions, 243 flow. Second operand 7 states and 81 transitions. [2023-11-26 10:44:57,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 54 transitions, 400 flow [2023-11-26 10:44:57,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 54 transitions, 343 flow, removed 7 selfloop flow, removed 9 redundant places. [2023-11-26 10:44:57,962 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 213 flow [2023-11-26 10:44:57,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=213, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2023-11-26 10:44:57,966 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 22 predicate places. [2023-11-26 10:44:57,967 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 213 flow [2023-11-26 10:44:57,967 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) [2023-11-26 10:44:57,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:57,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:57,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 10:44:57,968 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 10:44:57,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:57,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1667628514, now seen corresponding path program 6 times [2023-11-26 10:44:57,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:57,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899794136] [2023-11-26 10:44:57,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:57,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:44:58,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:58,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899794136] [2023-11-26 10:44:58,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899794136] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:58,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:58,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:44:58,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733292238] [2023-11-26 10:44:58,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:58,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:44:58,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:58,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:44:58,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:44:58,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2023-11-26 10:44:58,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 213 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) [2023-11-26 10:44:58,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:58,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2023-11-26 10:44:58,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:58,482 INFO L124 PetriNetUnfolderBase]: 78/171 cut-off events. [2023-11-26 10:44:58,483 INFO L125 PetriNetUnfolderBase]: For 255/255 co-relation queries the response was YES. [2023-11-26 10:44:58,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 561 conditions, 171 events. 78/171 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 580 event pairs, 25 based on Foata normal form. 1/171 useless extension candidates. Maximal degree in co-relation 544. Up to 105 conditions per place. [2023-11-26 10:44:58,487 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 22 selfloop transitions, 13 changer transitions 9/47 dead transitions. [2023-11-26 10:44:58,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 47 transitions, 340 flow [2023-11-26 10:44:58,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:44:58,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 10:44:58,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 74 transitions. [2023-11-26 10:44:58,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45962732919254656 [2023-11-26 10:44:58,491 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 74 transitions. [2023-11-26 10:44:58,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 74 transitions. [2023-11-26 10:44:58,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:58,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 74 transitions. [2023-11-26 10:44:58,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:58,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:58,494 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:58,495 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 213 flow. Second operand 7 states and 74 transitions. [2023-11-26 10:44:58,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 47 transitions, 340 flow [2023-11-26 10:44:58,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 47 transitions, 308 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-11-26 10:44:58,500 INFO L231 Difference]: Finished difference. Result has 46 places, 33 transitions, 202 flow [2023-11-26 10:44:58,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=202, PETRI_PLACES=46, PETRI_TRANSITIONS=33} [2023-11-26 10:44:58,504 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 21 predicate places. [2023-11-26 10:44:58,505 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 33 transitions, 202 flow [2023-11-26 10:44:58,505 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) [2023-11-26 10:44:58,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:58,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:58,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 10:44:58,506 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 10:44:58,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:58,507 INFO L85 PathProgramCache]: Analyzing trace with hash -894668948, now seen corresponding path program 1 times [2023-11-26 10:44:58,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:58,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992444132] [2023-11-26 10:44:58,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:58,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:58,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:44:58,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:58,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992444132] [2023-11-26 10:44:58,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992444132] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:58,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748182030] [2023-11-26 10:44:58,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:58,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:58,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:58,892 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:58,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:44:59,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:59,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 10:44:59,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:59,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:44:59,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:44:59,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748182030] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:44:59,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:44:59,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-26 10:44:59,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748576617] [2023-11-26 10:44:59,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:44:59,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 10:44:59,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:59,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 10:44:59,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-11-26 10:44:59,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-26 10:44:59,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 33 transitions, 202 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:59,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:59,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-26 10:44:59,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:01,495 INFO L124 PetriNetUnfolderBase]: 397/763 cut-off events. [2023-11-26 10:45:01,496 INFO L125 PetriNetUnfolderBase]: For 417/417 co-relation queries the response was YES. [2023-11-26 10:45:01,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2003 conditions, 763 events. 397/763 cut-off events. For 417/417 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3524 event pairs, 16 based on Foata normal form. 20/783 useless extension candidates. Maximal degree in co-relation 1963. Up to 157 conditions per place. [2023-11-26 10:45:01,504 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 143 selfloop transitions, 78 changer transitions 21/243 dead transitions. [2023-11-26 10:45:01,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 243 transitions, 1317 flow [2023-11-26 10:45:01,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-26 10:45:01,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-26 10:45:01,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 357 transitions. [2023-11-26 10:45:01,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38804347826086955 [2023-11-26 10:45:01,512 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 357 transitions. [2023-11-26 10:45:01,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 357 transitions. [2023-11-26 10:45:01,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:01,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 357 transitions. [2023-11-26 10:45:01,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 8.925) internal successors, (357), 40 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:01,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 23.0) internal successors, (943), 41 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:01,524 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 23.0) internal successors, (943), 41 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:01,524 INFO L175 Difference]: Start difference. First operand has 46 places, 33 transitions, 202 flow. Second operand 40 states and 357 transitions. [2023-11-26 10:45:01,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 243 transitions, 1317 flow [2023-11-26 10:45:01,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 243 transitions, 1265 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-11-26 10:45:01,535 INFO L231 Difference]: Finished difference. Result has 84 places, 105 transitions, 615 flow [2023-11-26 10:45:01,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=615, PETRI_PLACES=84, PETRI_TRANSITIONS=105} [2023-11-26 10:45:01,536 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 59 predicate places. [2023-11-26 10:45:01,537 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 105 transitions, 615 flow [2023-11-26 10:45:01,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:01,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:01,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:01,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 10:45:01,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 10:45:01,744 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 10:45:01,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:01,745 INFO L85 PathProgramCache]: Analyzing trace with hash 465028364, now seen corresponding path program 2 times [2023-11-26 10:45:01,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:01,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179266131] [2023-11-26 10:45:01,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:01,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:01,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:02,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:02,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:02,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179266131] [2023-11-26 10:45:02,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179266131] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:02,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576946998] [2023-11-26 10:45:02,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:45:02,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:02,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:02,062 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:02,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:45:02,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:45:02,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:45:02,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 10:45:02,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:02,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:02,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:02,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576946998] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:02,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:02,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-26 10:45:02,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714393777] [2023-11-26 10:45:02,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:02,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 10:45:02,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:02,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 10:45:02,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2023-11-26 10:45:02,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-26 10:45:02,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 105 transitions, 615 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:02,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:02,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-26 10:45:02,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:03,911 INFO L124 PetriNetUnfolderBase]: 502/965 cut-off events. [2023-11-26 10:45:03,912 INFO L125 PetriNetUnfolderBase]: For 995/995 co-relation queries the response was YES. [2023-11-26 10:45:03,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3261 conditions, 965 events. 502/965 cut-off events. For 995/995 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4825 event pairs, 39 based on Foata normal form. 2/967 useless extension candidates. Maximal degree in co-relation 3201. Up to 450 conditions per place. [2023-11-26 10:45:03,923 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 119 selfloop transitions, 119 changer transitions 12/251 dead transitions. [2023-11-26 10:45:03,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 251 transitions, 1746 flow [2023-11-26 10:45:03,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-26 10:45:03,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-26 10:45:03,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 290 transitions. [2023-11-26 10:45:03,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36024844720496896 [2023-11-26 10:45:03,926 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 290 transitions. [2023-11-26 10:45:03,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 290 transitions. [2023-11-26 10:45:03,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:03,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 290 transitions. [2023-11-26 10:45:03,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 8.285714285714286) internal successors, (290), 35 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:03,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 23.0) internal successors, (828), 36 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:03,933 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 23.0) internal successors, (828), 36 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:03,934 INFO L175 Difference]: Start difference. First operand has 84 places, 105 transitions, 615 flow. Second operand 35 states and 290 transitions. [2023-11-26 10:45:03,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 251 transitions, 1746 flow [2023-11-26 10:45:03,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 251 transitions, 1603 flow, removed 60 selfloop flow, removed 4 redundant places. [2023-11-26 10:45:03,957 INFO L231 Difference]: Finished difference. Result has 120 places, 160 transitions, 1172 flow [2023-11-26 10:45:03,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1172, PETRI_PLACES=120, PETRI_TRANSITIONS=160} [2023-11-26 10:45:03,960 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 95 predicate places. [2023-11-26 10:45:03,960 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 160 transitions, 1172 flow [2023-11-26 10:45:03,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:03,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:03,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:03,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-26 10:45:04,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:04,167 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 10:45:04,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:04,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1449373200, now seen corresponding path program 3 times [2023-11-26 10:45:04,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:04,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428726471] [2023-11-26 10:45:04,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:04,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:04,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:04,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428726471] [2023-11-26 10:45:04,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428726471] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:04,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619674047] [2023-11-26 10:45:04,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:45:04,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:04,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:04,521 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:04,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:45:04,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 10:45:04,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:45:04,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 10:45:04,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:04,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:04,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:05,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:05,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619674047] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:05,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:05,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-26 10:45:05,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019324578] [2023-11-26 10:45:05,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:05,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 10:45:05,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:05,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 10:45:05,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2023-11-26 10:45:05,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-26 10:45:05,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 160 transitions, 1172 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:05,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:05,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-26 10:45:05,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:08,800 INFO L124 PetriNetUnfolderBase]: 794/1531 cut-off events. [2023-11-26 10:45:08,800 INFO L125 PetriNetUnfolderBase]: For 3250/3250 co-relation queries the response was YES. [2023-11-26 10:45:08,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6048 conditions, 1531 events. 794/1531 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 8628 event pairs, 25 based on Foata normal form. 2/1531 useless extension candidates. Maximal degree in co-relation 6012. Up to 254 conditions per place. [2023-11-26 10:45:08,824 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 203 selfloop transitions, 242 changer transitions 14/460 dead transitions. [2023-11-26 10:45:08,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 460 transitions, 3671 flow [2023-11-26 10:45:08,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-26 10:45:08,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-11-26 10:45:08,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 532 transitions. [2023-11-26 10:45:08,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36141304347826086 [2023-11-26 10:45:08,831 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 532 transitions. [2023-11-26 10:45:08,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 532 transitions. [2023-11-26 10:45:08,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:08,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 532 transitions. [2023-11-26 10:45:08,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 8.3125) internal successors, (532), 64 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:08,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 23.0) internal successors, (1495), 65 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:08,842 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 23.0) internal successors, (1495), 65 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:08,842 INFO L175 Difference]: Start difference. First operand has 120 places, 160 transitions, 1172 flow. Second operand 64 states and 532 transitions. [2023-11-26 10:45:08,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 460 transitions, 3671 flow [2023-11-26 10:45:08,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 460 transitions, 3594 flow, removed 17 selfloop flow, removed 6 redundant places. [2023-11-26 10:45:08,908 INFO L231 Difference]: Finished difference. Result has 192 places, 281 transitions, 2692 flow [2023-11-26 10:45:08,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=2692, PETRI_PLACES=192, PETRI_TRANSITIONS=281} [2023-11-26 10:45:08,910 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 167 predicate places. [2023-11-26 10:45:08,911 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 281 transitions, 2692 flow [2023-11-26 10:45:08,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:08,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:08,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:08,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:09,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:09,118 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 10:45:09,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:09,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1625138926, now seen corresponding path program 4 times [2023-11-26 10:45:09,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:09,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399209081] [2023-11-26 10:45:09,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:09,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:09,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:09,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:09,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:09,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399209081] [2023-11-26 10:45:09,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399209081] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:09,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258934457] [2023-11-26 10:45:09,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 10:45:09,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:09,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:09,450 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:09,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:45:09,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 10:45:09,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:45:09,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 10:45:09,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:09,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:09,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:10,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258934457] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:10,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:10,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-26 10:45:10,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259498293] [2023-11-26 10:45:10,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:10,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 10:45:10,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:10,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 10:45:10,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2023-11-26 10:45:10,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-26 10:45:10,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 281 transitions, 2692 flow. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:10,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:10,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-26 10:45:10,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:13,795 INFO L124 PetriNetUnfolderBase]: 1075/2020 cut-off events. [2023-11-26 10:45:13,795 INFO L125 PetriNetUnfolderBase]: For 16030/16030 co-relation queries the response was YES. [2023-11-26 10:45:13,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10904 conditions, 2020 events. 1075/2020 cut-off events. For 16030/16030 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 11703 event pairs, 34 based on Foata normal form. 2/2018 useless extension candidates. Maximal degree in co-relation 10547. Up to 367 conditions per place. [2023-11-26 10:45:13,835 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 211 selfloop transitions, 335 changer transitions 14/561 dead transitions. [2023-11-26 10:45:13,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 561 transitions, 5834 flow [2023-11-26 10:45:13,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-26 10:45:13,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-11-26 10:45:13,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 547 transitions. [2023-11-26 10:45:13,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37160326086956524 [2023-11-26 10:45:13,843 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 547 transitions. [2023-11-26 10:45:13,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 547 transitions. [2023-11-26 10:45:13,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:13,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 547 transitions. [2023-11-26 10:45:13,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 8.546875) internal successors, (547), 64 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:13,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 23.0) internal successors, (1495), 65 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:13,853 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 23.0) internal successors, (1495), 65 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:13,853 INFO L175 Difference]: Start difference. First operand has 192 places, 281 transitions, 2692 flow. Second operand 64 states and 547 transitions. [2023-11-26 10:45:13,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 561 transitions, 5834 flow [2023-11-26 10:45:14,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 561 transitions, 5514 flow, removed 98 selfloop flow, removed 8 redundant places. [2023-11-26 10:45:14,019 INFO L231 Difference]: Finished difference. Result has 254 places, 384 transitions, 4192 flow [2023-11-26 10:45:14,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2424, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=4192, PETRI_PLACES=254, PETRI_TRANSITIONS=384} [2023-11-26 10:45:14,021 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 229 predicate places. [2023-11-26 10:45:14,021 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 384 transitions, 4192 flow [2023-11-26 10:45:14,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:14,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:14,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:14,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:14,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 10:45:14,230 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 10:45:14,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:14,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1924214320, now seen corresponding path program 5 times [2023-11-26 10:45:14,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:14,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659409252] [2023-11-26 10:45:14,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:14,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:14,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:14,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:14,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659409252] [2023-11-26 10:45:14,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659409252] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:14,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247814013] [2023-11-26 10:45:14,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 10:45:14,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:14,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:14,562 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:14,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:45:14,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:45:14,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:45:14,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 10:45:14,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:14,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:15,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:15,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247814013] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:15,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:15,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-26 10:45:15,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684240454] [2023-11-26 10:45:15,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:15,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 10:45:15,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:15,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 10:45:15,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2023-11-26 10:45:15,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-26 10:45:15,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 384 transitions, 4192 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:15,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:15,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-26 10:45:15,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:16,418 INFO L124 PetriNetUnfolderBase]: 1083/2044 cut-off events. [2023-11-26 10:45:16,419 INFO L125 PetriNetUnfolderBase]: For 20348/20348 co-relation queries the response was YES. [2023-11-26 10:45:16,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12456 conditions, 2044 events. 1083/2044 cut-off events. For 20348/20348 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 11919 event pairs, 110 based on Foata normal form. 2/2042 useless extension candidates. Maximal degree in co-relation 12078. Up to 1324 conditions per place. [2023-11-26 10:45:16,462 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 181 selfloop transitions, 246 changer transitions 10/438 dead transitions. [2023-11-26 10:45:16,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 438 transitions, 5437 flow [2023-11-26 10:45:16,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-26 10:45:16,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-26 10:45:16,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 151 transitions. [2023-11-26 10:45:16,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34553775743707094 [2023-11-26 10:45:16,464 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 151 transitions. [2023-11-26 10:45:16,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 151 transitions. [2023-11-26 10:45:16,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:16,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 151 transitions. [2023-11-26 10:45:16,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 7.947368421052632) internal successors, (151), 19 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:16,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 23.0) internal successors, (460), 20 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:16,523 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 23.0) internal successors, (460), 20 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:16,523 INFO L175 Difference]: Start difference. First operand has 254 places, 384 transitions, 4192 flow. Second operand 19 states and 151 transitions. [2023-11-26 10:45:16,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 438 transitions, 5437 flow [2023-11-26 10:45:16,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 438 transitions, 5120 flow, removed 71 selfloop flow, removed 22 redundant places. [2023-11-26 10:45:16,683 INFO L231 Difference]: Finished difference. Result has 255 places, 396 transitions, 4880 flow [2023-11-26 10:45:16,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=3928, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4880, PETRI_PLACES=255, PETRI_TRANSITIONS=396} [2023-11-26 10:45:16,684 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 230 predicate places. [2023-11-26 10:45:16,685 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 396 transitions, 4880 flow [2023-11-26 10:45:16,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:16,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:16,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:16,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-26 10:45:16,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:16,893 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 10:45:16,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:16,893 INFO L85 PathProgramCache]: Analyzing trace with hash 263968856, now seen corresponding path program 6 times [2023-11-26 10:45:16,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:16,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820413912] [2023-11-26 10:45:16,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:16,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:17,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:17,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820413912] [2023-11-26 10:45:17,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820413912] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:17,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071429872] [2023-11-26 10:45:17,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 10:45:17,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:17,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:17,281 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:17,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:45:17,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-26 10:45:17,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:45:17,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 10:45:17,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:17,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:17,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:17,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071429872] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:17,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:17,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-26 10:45:17,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508964016] [2023-11-26 10:45:17,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:17,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 10:45:17,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:17,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 10:45:17,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2023-11-26 10:45:17,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-26 10:45:17,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 396 transitions, 4880 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:17,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:17,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-26 10:45:17,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:19,396 INFO L124 PetriNetUnfolderBase]: 1098/2077 cut-off events. [2023-11-26 10:45:19,396 INFO L125 PetriNetUnfolderBase]: For 17419/17419 co-relation queries the response was YES. [2023-11-26 10:45:19,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13149 conditions, 2077 events. 1098/2077 cut-off events. For 17419/17419 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 12158 event pairs, 122 based on Foata normal form. 2/2079 useless extension candidates. Maximal degree in co-relation 13087. Up to 1380 conditions per place. [2023-11-26 10:45:19,454 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 191 selfloop transitions, 252 changer transitions 10/454 dead transitions. [2023-11-26 10:45:19,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 454 transitions, 6141 flow [2023-11-26 10:45:19,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-26 10:45:19,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-26 10:45:19,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 181 transitions. [2023-11-26 10:45:19,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3278985507246377 [2023-11-26 10:45:19,460 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 181 transitions. [2023-11-26 10:45:19,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 181 transitions. [2023-11-26 10:45:19,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:19,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 181 transitions. [2023-11-26 10:45:19,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 7.541666666666667) internal successors, (181), 24 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:19,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 23.0) internal successors, (575), 25 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:19,470 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 23.0) internal successors, (575), 25 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:19,470 INFO L175 Difference]: Start difference. First operand has 255 places, 396 transitions, 4880 flow. Second operand 24 states and 181 transitions. [2023-11-26 10:45:19,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 454 transitions, 6141 flow [2023-11-26 10:45:19,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 454 transitions, 6073 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-26 10:45:19,654 INFO L231 Difference]: Finished difference. Result has 278 places, 407 transitions, 5788 flow [2023-11-26 10:45:19,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=4815, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5788, PETRI_PLACES=278, PETRI_TRANSITIONS=407} [2023-11-26 10:45:19,657 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 253 predicate places. [2023-11-26 10:45:19,657 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 407 transitions, 5788 flow [2023-11-26 10:45:19,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:19,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:19,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:19,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:19,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:19,864 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 10:45:19,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:19,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1339680012, now seen corresponding path program 7 times [2023-11-26 10:45:19,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:19,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116868354] [2023-11-26 10:45:19,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:19,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:20,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:20,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:20,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116868354] [2023-11-26 10:45:20,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116868354] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:20,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097939121] [2023-11-26 10:45:20,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 10:45:20,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:20,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:20,157 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:20,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:45:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:20,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 10:45:20,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:20,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:20,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:20,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097939121] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:20,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:20,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-26 10:45:20,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421272230] [2023-11-26 10:45:20,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:20,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 10:45:20,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:20,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 10:45:20,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2023-11-26 10:45:20,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-26 10:45:20,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 407 transitions, 5788 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:20,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:20,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-26 10:45:20,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:22,079 INFO L124 PetriNetUnfolderBase]: 1127/2148 cut-off events. [2023-11-26 10:45:22,080 INFO L125 PetriNetUnfolderBase]: For 21311/21311 co-relation queries the response was YES. [2023-11-26 10:45:22,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14734 conditions, 2148 events. 1127/2148 cut-off events. For 21311/21311 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 12778 event pairs, 124 based on Foata normal form. 2/2150 useless extension candidates. Maximal degree in co-relation 14667. Up to 1473 conditions per place. [2023-11-26 10:45:22,114 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 195 selfloop transitions, 257 changer transitions 10/463 dead transitions. [2023-11-26 10:45:22,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 463 transitions, 7144 flow [2023-11-26 10:45:22,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-26 10:45:22,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-26 10:45:22,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 162 transitions. [2023-11-26 10:45:22,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33540372670807456 [2023-11-26 10:45:22,118 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 162 transitions. [2023-11-26 10:45:22,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 162 transitions. [2023-11-26 10:45:22,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:22,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 162 transitions. [2023-11-26 10:45:22,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 7.714285714285714) internal successors, (162), 21 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:22,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 23.0) internal successors, (506), 22 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:22,122 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 23.0) internal successors, (506), 22 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:22,122 INFO L175 Difference]: Start difference. First operand has 278 places, 407 transitions, 5788 flow. Second operand 21 states and 162 transitions. [2023-11-26 10:45:22,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 463 transitions, 7144 flow [2023-11-26 10:45:22,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 463 transitions, 7076 flow, removed 4 selfloop flow, removed 12 redundant places. [2023-11-26 10:45:22,387 INFO L231 Difference]: Finished difference. Result has 292 places, 423 transitions, 6956 flow [2023-11-26 10:45:22,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=5720, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6956, PETRI_PLACES=292, PETRI_TRANSITIONS=423} [2023-11-26 10:45:22,388 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 267 predicate places. [2023-11-26 10:45:22,388 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 423 transitions, 6956 flow [2023-11-26 10:45:22,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:22,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:22,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:22,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:22,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 10:45:22,593 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 10:45:22,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:22,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1915051486, now seen corresponding path program 8 times [2023-11-26 10:45:22,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:22,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501586888] [2023-11-26 10:45:22,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:22,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:22,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:22,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:22,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501586888] [2023-11-26 10:45:22,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501586888] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:22,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547027149] [2023-11-26 10:45:22,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:45:22,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:22,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:22,833 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:22,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:45:22,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:45:22,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:45:22,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 10:45:22,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:23,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:23,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547027149] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:23,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:23,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-26 10:45:23,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333428019] [2023-11-26 10:45:23,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:23,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 10:45:23,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:23,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 10:45:23,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2023-11-26 10:45:23,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-26 10:45:23,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 423 transitions, 6956 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:23,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:23,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-26 10:45:23,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:24,989 INFO L124 PetriNetUnfolderBase]: 1133/2166 cut-off events. [2023-11-26 10:45:24,989 INFO L125 PetriNetUnfolderBase]: For 26299/26299 co-relation queries the response was YES. [2023-11-26 10:45:25,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16262 conditions, 2166 events. 1133/2166 cut-off events. For 26299/26299 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 12916 event pairs, 129 based on Foata normal form. 2/2168 useless extension candidates. Maximal degree in co-relation 16190. Up to 1357 conditions per place. [2023-11-26 10:45:25,027 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 174 selfloop transitions, 293 changer transitions 10/478 dead transitions. [2023-11-26 10:45:25,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 478 transitions, 8257 flow [2023-11-26 10:45:25,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-26 10:45:25,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-26 10:45:25,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 196 transitions. [2023-11-26 10:45:25,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31561996779388085 [2023-11-26 10:45:25,031 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 196 transitions. [2023-11-26 10:45:25,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 196 transitions. [2023-11-26 10:45:25,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:25,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 196 transitions. [2023-11-26 10:45:25,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 7.2592592592592595) internal successors, (196), 27 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:25,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 23.0) internal successors, (644), 28 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:25,035 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 23.0) internal successors, (644), 28 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:25,035 INFO L175 Difference]: Start difference. First operand has 292 places, 423 transitions, 6956 flow. Second operand 27 states and 196 transitions. [2023-11-26 10:45:25,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 478 transitions, 8257 flow [2023-11-26 10:45:25,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 478 transitions, 8148 flow, removed 7 selfloop flow, removed 13 redundant places. [2023-11-26 10:45:25,413 INFO L231 Difference]: Finished difference. Result has 310 places, 433 transitions, 7908 flow [2023-11-26 10:45:25,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=6854, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=7908, PETRI_PLACES=310, PETRI_TRANSITIONS=433} [2023-11-26 10:45:25,415 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 285 predicate places. [2023-11-26 10:45:25,416 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 433 transitions, 7908 flow [2023-11-26 10:45:25,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:25,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:25,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:25,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:25,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 10:45:25,624 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 10:45:25,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:25,624 INFO L85 PathProgramCache]: Analyzing trace with hash 55036642, now seen corresponding path program 9 times [2023-11-26 10:45:25,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:25,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835639147] [2023-11-26 10:45:25,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:25,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:25,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:25,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835639147] [2023-11-26 10:45:25,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835639147] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:25,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803384078] [2023-11-26 10:45:25,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:45:25,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:25,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:25,905 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:25,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:45:26,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 10:45:26,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:45:26,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 10:45:26,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:26,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:26,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:26,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803384078] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:26,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:26,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-26 10:45:26,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591355457] [2023-11-26 10:45:26,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:26,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 10:45:26,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:26,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 10:45:26,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2023-11-26 10:45:26,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-26 10:45:26,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 433 transitions, 7908 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:26,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:26,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-26 10:45:26,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:29,194 INFO L124 PetriNetUnfolderBase]: 1471/2780 cut-off events. [2023-11-26 10:45:29,194 INFO L125 PetriNetUnfolderBase]: For 44031/44031 co-relation queries the response was YES. [2023-11-26 10:45:29,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22476 conditions, 2780 events. 1471/2780 cut-off events. For 44031/44031 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17420 event pairs, 99 based on Foata normal form. 3/2783 useless extension candidates. Maximal degree in co-relation 22399. Up to 1060 conditions per place. [2023-11-26 10:45:29,258 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 266 selfloop transitions, 434 changer transitions 18/719 dead transitions. [2023-11-26 10:45:29,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 719 transitions, 13026 flow [2023-11-26 10:45:29,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-26 10:45:29,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-11-26 10:45:29,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 435 transitions. [2023-11-26 10:45:29,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3637123745819398 [2023-11-26 10:45:29,261 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 435 transitions. [2023-11-26 10:45:29,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 435 transitions. [2023-11-26 10:45:29,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:29,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 435 transitions. [2023-11-26 10:45:29,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 8.365384615384615) internal successors, (435), 52 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:29,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 23.0) internal successors, (1219), 53 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:29,267 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 23.0) internal successors, (1219), 53 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:29,267 INFO L175 Difference]: Start difference. First operand has 310 places, 433 transitions, 7908 flow. Second operand 52 states and 435 transitions. [2023-11-26 10:45:29,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 719 transitions, 13026 flow [2023-11-26 10:45:29,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 719 transitions, 12895 flow, removed 8 selfloop flow, removed 13 redundant places. [2023-11-26 10:45:29,792 INFO L231 Difference]: Finished difference. Result has 367 places, 586 transitions, 12109 flow [2023-11-26 10:45:29,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=7790, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=12109, PETRI_PLACES=367, PETRI_TRANSITIONS=586} [2023-11-26 10:45:29,793 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 342 predicate places. [2023-11-26 10:45:29,793 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 586 transitions, 12109 flow [2023-11-26 10:45:29,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:29,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:29,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:29,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:30,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 10:45:30,001 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 10:45:30,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:30,002 INFO L85 PathProgramCache]: Analyzing trace with hash -233214576, now seen corresponding path program 10 times [2023-11-26 10:45:30,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:30,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243735607] [2023-11-26 10:45:30,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:30,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:30,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:30,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:30,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:30,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243735607] [2023-11-26 10:45:30,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243735607] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:30,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697571468] [2023-11-26 10:45:30,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 10:45:30,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:30,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:30,233 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:30,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 10:45:30,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 10:45:30,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:45:30,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 10:45:30,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:30,577 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:30,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:30,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697571468] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:30,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:30,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-26 10:45:30,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626914119] [2023-11-26 10:45:30,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:30,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 10:45:30,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:30,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 10:45:30,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2023-11-26 10:45:30,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-26 10:45:30,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 586 transitions, 12109 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:30,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:30,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-26 10:45:30,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:32,319 INFO L124 PetriNetUnfolderBase]: 1465/2779 cut-off events. [2023-11-26 10:45:32,319 INFO L125 PetriNetUnfolderBase]: For 65418/65418 co-relation queries the response was YES. [2023-11-26 10:45:32,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25849 conditions, 2779 events. 1465/2779 cut-off events. For 65418/65418 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17478 event pairs, 123 based on Foata normal form. 2/2781 useless extension candidates. Maximal degree in co-relation 25750. Up to 1825 conditions per place. [2023-11-26 10:45:32,369 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 290 selfloop transitions, 324 changer transitions 10/625 dead transitions. [2023-11-26 10:45:32,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 625 transitions, 13677 flow [2023-11-26 10:45:32,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-26 10:45:32,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-26 10:45:32,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 145 transitions. [2023-11-26 10:45:32,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3318077803203661 [2023-11-26 10:45:32,372 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 145 transitions. [2023-11-26 10:45:32,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 145 transitions. [2023-11-26 10:45:32,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:32,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 145 transitions. [2023-11-26 10:45:32,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 7.631578947368421) internal successors, (145), 19 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:32,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 23.0) internal successors, (460), 20 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:32,382 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 23.0) internal successors, (460), 20 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:32,383 INFO L175 Difference]: Start difference. First operand has 367 places, 586 transitions, 12109 flow. Second operand 19 states and 145 transitions. [2023-11-26 10:45:32,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 625 transitions, 13677 flow [2023-11-26 10:45:33,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 625 transitions, 13017 flow, removed 271 selfloop flow, removed 16 redundant places. [2023-11-26 10:45:33,126 INFO L231 Difference]: Finished difference. Result has 373 places, 591 transitions, 12654 flow [2023-11-26 10:45:33,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=11461, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=319, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=12654, PETRI_PLACES=373, PETRI_TRANSITIONS=591} [2023-11-26 10:45:33,127 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 348 predicate places. [2023-11-26 10:45:33,128 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 591 transitions, 12654 flow [2023-11-26 10:45:33,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:33,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:33,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:33,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:33,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 10:45:33,337 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 10:45:33,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:33,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1304204654, now seen corresponding path program 11 times [2023-11-26 10:45:33,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:33,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953675844] [2023-11-26 10:45:33,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:33,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:33,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:33,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:33,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953675844] [2023-11-26 10:45:33,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953675844] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:33,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904898979] [2023-11-26 10:45:33,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 10:45:33,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:33,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:33,673 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:33,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 10:45:33,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:45:33,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:45:33,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 10:45:33,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:34,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:34,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:34,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:34,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904898979] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:34,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:34,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-26 10:45:34,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048868521] [2023-11-26 10:45:34,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:34,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 10:45:34,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:34,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 10:45:34,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2023-11-26 10:45:34,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-26 10:45:34,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 591 transitions, 12654 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:34,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:34,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-26 10:45:34,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:36,011 INFO L124 PetriNetUnfolderBase]: 1467/2782 cut-off events. [2023-11-26 10:45:36,011 INFO L125 PetriNetUnfolderBase]: For 63017/63017 co-relation queries the response was YES. [2023-11-26 10:45:36,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25674 conditions, 2782 events. 1467/2782 cut-off events. For 63017/63017 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17454 event pairs, 119 based on Foata normal form. 1/2783 useless extension candidates. Maximal degree in co-relation 25572. Up to 1826 conditions per place. [2023-11-26 10:45:36,061 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 274 selfloop transitions, 354 changer transitions 5/634 dead transitions. [2023-11-26 10:45:36,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 634 transitions, 14168 flow [2023-11-26 10:45:36,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-26 10:45:36,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-26 10:45:36,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 192 transitions. [2023-11-26 10:45:36,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30917874396135264 [2023-11-26 10:45:36,064 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 192 transitions. [2023-11-26 10:45:36,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 192 transitions. [2023-11-26 10:45:36,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:36,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 192 transitions. [2023-11-26 10:45:36,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 7.111111111111111) internal successors, (192), 27 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:36,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 23.0) internal successors, (644), 28 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:36,156 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 23.0) internal successors, (644), 28 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:36,156 INFO L175 Difference]: Start difference. First operand has 373 places, 591 transitions, 12654 flow. Second operand 27 states and 192 transitions. [2023-11-26 10:45:36,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 634 transitions, 14168 flow [2023-11-26 10:45:36,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 634 transitions, 13904 flow, removed 9 selfloop flow, removed 11 redundant places. [2023-11-26 10:45:36,699 INFO L231 Difference]: Finished difference. Result has 388 places, 594 transitions, 13195 flow [2023-11-26 10:45:36,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=12390, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=13195, PETRI_PLACES=388, PETRI_TRANSITIONS=594} [2023-11-26 10:45:36,701 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 363 predicate places. [2023-11-26 10:45:36,701 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 594 transitions, 13195 flow [2023-11-26 10:45:36,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:36,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:36,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:36,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:36,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 10:45:36,902 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 10:45:36,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:36,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1674605338, now seen corresponding path program 12 times [2023-11-26 10:45:36,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:36,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553357748] [2023-11-26 10:45:36,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:36,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:36,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:37,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:37,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553357748] [2023-11-26 10:45:37,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553357748] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:37,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34622657] [2023-11-26 10:45:37,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 10:45:37,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:37,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:37,124 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:37,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa67eeb-98cc-43bf-9ce2-b1c94ff492a0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 10:45:37,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-26 10:45:37,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:45:37,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 10:45:37,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:37,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:37,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:37,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:37,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34622657] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:37,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:37,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-26 10:45:37,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574779514] [2023-11-26 10:45:37,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:37,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 10:45:37,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:37,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 10:45:37,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2023-11-26 10:45:37,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-26 10:45:37,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 594 transitions, 13195 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:37,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:37,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-26 10:45:37,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand