./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:32:14,757 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:32:14,871 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:32:14,879 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:32:14,879 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:32:14,916 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:32:14,921 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:32:14,921 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:32:14,923 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:32:14,928 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:32:14,929 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:32:14,930 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:32:14,930 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:32:14,932 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:32:14,932 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:32:14,933 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:32:14,933 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:32:14,934 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:32:14,934 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:32:14,935 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:32:14,935 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:32:14,935 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:32:14,936 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:32:14,936 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:32:14,937 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:32:14,937 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:32:14,937 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:32:14,938 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:32:14,939 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:32:14,939 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:32:14,940 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:32:14,941 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:32:14,941 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:32:14,941 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:32:14,941 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:32:14,942 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:32:14,942 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:32:14,942 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:32:14,942 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:32:14,943 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:32:14,943 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:32:14,943 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:32:14,943 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_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e [2023-11-23 22:32:15,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:32:15,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:32:15,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:32:15,273 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:32:15,274 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:32:15,275 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2023-11-23 22:32:18,794 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:32:19,123 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:32:19,125 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2023-11-23 22:32:19,140 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/data/eecbc3b5b/f7d86cbaa68440b5b53e0d6aa1bf6c3b/FLAG55657b146 [2023-11-23 22:32:19,161 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/data/eecbc3b5b/f7d86cbaa68440b5b53e0d6aa1bf6c3b [2023-11-23 22:32:19,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:32:19,171 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:32:19,177 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:32:19,177 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:32:19,184 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:32:19,185 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:32:19" (1/1) ... [2023-11-23 22:32:19,186 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cfc39de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:19, skipping insertion in model container [2023-11-23 22:32:19,186 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:32:19" (1/1) ... [2023-11-23 22:32:19,244 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:32:19,577 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_dbcb2901-45c3-4717-a196-98a14ed126e6/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c[4643,4656] [2023-11-23 22:32:19,591 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:32:19,605 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:32:19,647 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_dbcb2901-45c3-4717-a196-98a14ed126e6/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c[4643,4656] [2023-11-23 22:32:19,652 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:32:19,663 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:32:19,664 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:32:19,673 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:32:19,674 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:19 WrapperNode [2023-11-23 22:32:19,674 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:32:19,675 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:32:19,676 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:32:19,676 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:32:19,685 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:19" (1/1) ... [2023-11-23 22:32:19,699 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:19" (1/1) ... [2023-11-23 22:32:19,746 INFO L138 Inliner]: procedures = 25, calls = 68, calls flagged for inlining = 20, calls inlined = 24, statements flattened = 352 [2023-11-23 22:32:19,747 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:32:19,748 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:32:19,748 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:32:19,749 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:32:19,776 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:19" (1/1) ... [2023-11-23 22:32:19,777 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:19" (1/1) ... [2023-11-23 22:32:19,785 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:19" (1/1) ... [2023-11-23 22:32:19,824 INFO L189 HeapSplitter]: Split 19 memory accesses to 5 slices as follows [2, 2, 11, 2, 2] [2023-11-23 22:32:19,824 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:19" (1/1) ... [2023-11-23 22:32:19,825 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:19" (1/1) ... [2023-11-23 22:32:19,843 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:19" (1/1) ... [2023-11-23 22:32:19,850 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:19" (1/1) ... [2023-11-23 22:32:19,854 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:19" (1/1) ... [2023-11-23 22:32:19,857 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:19" (1/1) ... [2023-11-23 22:32:19,865 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:32:19,866 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:32:19,866 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:32:19,866 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:32:19,868 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:19" (1/1) ... [2023-11-23 22:32:19,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:32:19,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:32:19,912 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:32:19,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:32:19,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:32:19,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:32:19,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 22:32:19,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 22:32:19,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 22:32:19,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 22:32:19,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-23 22:32:19,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 22:32:19,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 22:32:19,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 22:32:19,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 22:32:19,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-23 22:32:19,959 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-23 22:32:19,960 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-23 22:32:19,960 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-23 22:32:19,960 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-23 22:32:19,960 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-23 22:32:19,961 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-23 22:32:19,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:32:19,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:32:19,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:32:19,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 22:32:19,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-23 22:32:19,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-23 22:32:19,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-23 22:32:19,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 22:32:19,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:32:19,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:32:19,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:32:19,965 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 22:32:20,138 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:32:20,141 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:32:20,945 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:32:21,591 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:32:21,591 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-23 22:32:21,592 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:32:21 BoogieIcfgContainer [2023-11-23 22:32:21,592 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:32:21,597 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:32:21,597 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:32:21,602 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:32:21,603 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:32:19" (1/3) ... [2023-11-23 22:32:21,604 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5af37817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:32:21, skipping insertion in model container [2023-11-23 22:32:21,604 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:19" (2/3) ... [2023-11-23 22:32:21,606 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5af37817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:32:21, skipping insertion in model container [2023-11-23 22:32:21,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:32:21" (3/3) ... [2023-11-23 22:32:21,608 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-commit-1.wvr.c [2023-11-23 22:32:21,622 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 22:32:21,636 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:32:21,636 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:32:21,636 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 22:32:21,742 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-23 22:32:21,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 50 transitions, 121 flow [2023-11-23 22:32:21,874 INFO L124 PetriNetUnfolderBase]: 9/47 cut-off events. [2023-11-23 22:32:21,874 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-23 22:32:21,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 9/47 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 82 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2023-11-23 22:32:21,881 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 50 transitions, 121 flow [2023-11-23 22:32:21,890 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 46 transitions, 110 flow [2023-11-23 22:32:21,914 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:32:21,926 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;@3dea5e89, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:32:21,927 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-23 22:32:21,963 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:32:21,963 INFO L124 PetriNetUnfolderBase]: 9/45 cut-off events. [2023-11-23 22:32:21,964 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-23 22:32:21,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:32:21,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:21,966 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:32:21,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:21,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1006778924, now seen corresponding path program 1 times [2023-11-23 22:32:21,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:21,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440360971] [2023-11-23 22:32:21,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:21,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:22,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:22,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:22,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440360971] [2023-11-23 22:32:22,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440360971] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:22,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:22,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:32:22,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776594008] [2023-11-23 22:32:22,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:22,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 22:32:22,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:22,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 22:32:22,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:32:22,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2023-11-23 22:32:22,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 110 flow. Second operand has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:22,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:32:22,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2023-11-23 22:32:22,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:32:23,234 INFO L124 PetriNetUnfolderBase]: 2074/3055 cut-off events. [2023-11-23 22:32:23,234 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2023-11-23 22:32:23,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6056 conditions, 3055 events. 2074/3055 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 15974 event pairs, 1444 based on Foata normal form. 610/2996 useless extension candidates. Maximal degree in co-relation 5453. Up to 2840 conditions per place. [2023-11-23 22:32:23,273 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 36 selfloop transitions, 0 changer transitions 0/43 dead transitions. [2023-11-23 22:32:23,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 43 transitions, 176 flow [2023-11-23 22:32:23,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 22:32:23,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-23 22:32:23,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 59 transitions. [2023-11-23 22:32:23,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2023-11-23 22:32:23,290 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 59 transitions. [2023-11-23 22:32:23,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 59 transitions. [2023-11-23 22:32:23,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:32:23,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 59 transitions. [2023-11-23 22:32:23,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 29.5) internal successors, (59), 2 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:23,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:23,302 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:23,304 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 110 flow. Second operand 2 states and 59 transitions. [2023-11-23 22:32:23,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 43 transitions, 176 flow [2023-11-23 22:32:23,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 164 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-23 22:32:23,320 INFO L231 Difference]: Finished difference. Result has 42 places, 43 transitions, 92 flow [2023-11-23 22:32:23,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=92, PETRI_PLACES=42, PETRI_TRANSITIONS=43} [2023-11-23 22:32:23,326 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -5 predicate places. [2023-11-23 22:32:23,327 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 43 transitions, 92 flow [2023-11-23 22:32:23,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:23,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:32:23,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:23,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:32:23,329 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:32:23,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:23,330 INFO L85 PathProgramCache]: Analyzing trace with hash -148166097, now seen corresponding path program 1 times [2023-11-23 22:32:23,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:23,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722621325] [2023-11-23 22:32:23,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:23,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:23,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:23,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:23,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722621325] [2023-11-23 22:32:23,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722621325] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:23,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:23,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:32:23,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242976669] [2023-11-23 22:32:23,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:23,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:32:23,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:23,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:32:23,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:32:23,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2023-11-23 22:32:23,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 43 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:23,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:32:23,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2023-11-23 22:32:23,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:32:24,353 INFO L124 PetriNetUnfolderBase]: 2667/3983 cut-off events. [2023-11-23 22:32:24,353 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-11-23 22:32:24,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7751 conditions, 3983 events. 2667/3983 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 22889 event pairs, 547 based on Foata normal form. 1/3163 useless extension candidates. Maximal degree in co-relation 7748. Up to 3020 conditions per place. [2023-11-23 22:32:24,389 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 54 selfloop transitions, 4 changer transitions 1/66 dead transitions. [2023-11-23 22:32:24,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 66 transitions, 261 flow [2023-11-23 22:32:24,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:32:24,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:32:24,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2023-11-23 22:32:24,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2023-11-23 22:32:24,392 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 90 transitions. [2023-11-23 22:32:24,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 90 transitions. [2023-11-23 22:32:24,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:32:24,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 90 transitions. [2023-11-23 22:32:24,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:24,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:24,396 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:24,396 INFO L175 Difference]: Start difference. First operand has 42 places, 43 transitions, 92 flow. Second operand 3 states and 90 transitions. [2023-11-23 22:32:24,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 66 transitions, 261 flow [2023-11-23 22:32:24,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 66 transitions, 261 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-23 22:32:24,400 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 118 flow [2023-11-23 22:32:24,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2023-11-23 22:32:24,401 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -2 predicate places. [2023-11-23 22:32:24,401 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 118 flow [2023-11-23 22:32:24,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:24,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:32:24,402 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:24,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:32:24,403 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:32:24,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:24,404 INFO L85 PathProgramCache]: Analyzing trace with hash 2132053301, now seen corresponding path program 1 times [2023-11-23 22:32:24,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:24,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599616508] [2023-11-23 22:32:24,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:24,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:24,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:24,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:24,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599616508] [2023-11-23 22:32:24,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599616508] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:24,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:24,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:32:24,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453849219] [2023-11-23 22:32:24,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:24,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:32:24,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:24,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:32:24,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:32:24,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2023-11-23 22:32:24,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:24,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:32:24,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2023-11-23 22:32:24,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:32:25,314 INFO L124 PetriNetUnfolderBase]: 2886/4323 cut-off events. [2023-11-23 22:32:25,314 INFO L125 PetriNetUnfolderBase]: For 434/434 co-relation queries the response was YES. [2023-11-23 22:32:25,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9073 conditions, 4323 events. 2886/4323 cut-off events. For 434/434 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 24919 event pairs, 1113 based on Foata normal form. 122/3590 useless extension candidates. Maximal degree in co-relation 9068. Up to 2553 conditions per place. [2023-11-23 22:32:25,350 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 60 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2023-11-23 22:32:25,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 69 transitions, 296 flow [2023-11-23 22:32:25,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:32:25,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:32:25,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2023-11-23 22:32:25,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6066666666666667 [2023-11-23 22:32:25,354 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 91 transitions. [2023-11-23 22:32:25,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 91 transitions. [2023-11-23 22:32:25,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:32:25,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 91 transitions. [2023-11-23 22:32:25,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:25,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:25,359 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:25,359 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 118 flow. Second operand 3 states and 91 transitions. [2023-11-23 22:32:25,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 69 transitions, 296 flow [2023-11-23 22:32:25,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 69 transitions, 293 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:32:25,363 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 122 flow [2023-11-23 22:32:25,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2023-11-23 22:32:25,366 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2023-11-23 22:32:25,366 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 122 flow [2023-11-23 22:32:25,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:25,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:32:25,367 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:25,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 22:32:25,367 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:32:25,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:25,368 INFO L85 PathProgramCache]: Analyzing trace with hash 2030150897, now seen corresponding path program 1 times [2023-11-23 22:32:25,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:25,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090361773] [2023-11-23 22:32:25,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:25,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:25,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:25,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090361773] [2023-11-23 22:32:25,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090361773] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:25,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:25,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:32:25,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675941011] [2023-11-23 22:32:25,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:25,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:32:25,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:25,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:32:25,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:32:25,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2023-11-23 22:32:25,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:25,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:32:25,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2023-11-23 22:32:25,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:32:26,187 INFO L124 PetriNetUnfolderBase]: 2722/4078 cut-off events. [2023-11-23 22:32:26,187 INFO L125 PetriNetUnfolderBase]: For 519/519 co-relation queries the response was YES. [2023-11-23 22:32:26,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8727 conditions, 4078 events. 2722/4078 cut-off events. For 519/519 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 22792 event pairs, 877 based on Foata normal form. 74/3364 useless extension candidates. Maximal degree in co-relation 8721. Up to 2569 conditions per place. [2023-11-23 22:32:26,226 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 53 selfloop transitions, 2 changer transitions 7/69 dead transitions. [2023-11-23 22:32:26,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 69 transitions, 299 flow [2023-11-23 22:32:26,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:32:26,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:32:26,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2023-11-23 22:32:26,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2023-11-23 22:32:26,231 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 93 transitions. [2023-11-23 22:32:26,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 93 transitions. [2023-11-23 22:32:26,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:32:26,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 93 transitions. [2023-11-23 22:32:26,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:26,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:26,238 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:26,238 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 122 flow. Second operand 3 states and 93 transitions. [2023-11-23 22:32:26,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 69 transitions, 299 flow [2023-11-23 22:32:26,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 69 transitions, 297 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:32:26,244 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 128 flow [2023-11-23 22:32:26,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-11-23 22:32:26,247 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2023-11-23 22:32:26,247 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 128 flow [2023-11-23 22:32:26,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:26,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:32:26,248 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:26,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 22:32:26,248 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:32:26,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:26,254 INFO L85 PathProgramCache]: Analyzing trace with hash 828420806, now seen corresponding path program 1 times [2023-11-23 22:32:26,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:26,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447252363] [2023-11-23 22:32:26,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:26,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:26,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:26,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:26,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:26,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447252363] [2023-11-23 22:32:26,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447252363] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:26,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:26,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:32:26,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140319109] [2023-11-23 22:32:26,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:26,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:32:26,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:26,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:32:26,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:32:26,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2023-11-23 22:32:26,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:26,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:32:26,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2023-11-23 22:32:26,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:32:26,935 INFO L124 PetriNetUnfolderBase]: 1734/2640 cut-off events. [2023-11-23 22:32:26,936 INFO L125 PetriNetUnfolderBase]: For 597/597 co-relation queries the response was YES. [2023-11-23 22:32:26,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5769 conditions, 2640 events. 1734/2640 cut-off events. For 597/597 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13716 event pairs, 841 based on Foata normal form. 42/2172 useless extension candidates. Maximal degree in co-relation 5762. Up to 1965 conditions per place. [2023-11-23 22:32:26,960 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 44 selfloop transitions, 2 changer transitions 9/62 dead transitions. [2023-11-23 22:32:26,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 62 transitions, 273 flow [2023-11-23 22:32:26,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:32:26,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:32:26,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2023-11-23 22:32:26,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5533333333333333 [2023-11-23 22:32:26,964 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 83 transitions. [2023-11-23 22:32:26,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 83 transitions. [2023-11-23 22:32:26,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:32:26,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 83 transitions. [2023-11-23 22:32:26,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:26,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:26,967 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:26,967 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 128 flow. Second operand 3 states and 83 transitions. [2023-11-23 22:32:26,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 62 transitions, 273 flow [2023-11-23 22:32:26,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 62 transitions, 271 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:32:26,971 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 138 flow [2023-11-23 22:32:26,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2023-11-23 22:32:26,974 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2023-11-23 22:32:26,975 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 138 flow [2023-11-23 22:32:26,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:26,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:32:26,976 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:26,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 22:32:26,977 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:32:26,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:26,978 INFO L85 PathProgramCache]: Analyzing trace with hash -23213912, now seen corresponding path program 1 times [2023-11-23 22:32:26,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:26,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230230723] [2023-11-23 22:32:26,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:26,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:27,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:27,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:27,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230230723] [2023-11-23 22:32:27,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230230723] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:27,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:27,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:32:27,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086293979] [2023-11-23 22:32:27,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:27,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:32:27,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:27,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:32:27,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:32:27,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2023-11-23 22:32:27,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:27,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:32:27,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2023-11-23 22:32:27,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:32:27,851 INFO L124 PetriNetUnfolderBase]: 2069/3233 cut-off events. [2023-11-23 22:32:27,851 INFO L125 PetriNetUnfolderBase]: For 650/650 co-relation queries the response was YES. [2023-11-23 22:32:27,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7111 conditions, 3233 events. 2069/3233 cut-off events. For 650/650 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 18233 event pairs, 1738 based on Foata normal form. 42/2609 useless extension candidates. Maximal degree in co-relation 7103. Up to 2514 conditions per place. [2023-11-23 22:32:27,879 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 39 selfloop transitions, 2 changer transitions 25/73 dead transitions. [2023-11-23 22:32:27,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 73 transitions, 328 flow [2023-11-23 22:32:27,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:32:27,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:32:27,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2023-11-23 22:32:27,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515 [2023-11-23 22:32:27,881 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 103 transitions. [2023-11-23 22:32:27,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 103 transitions. [2023-11-23 22:32:27,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:32:27,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 103 transitions. [2023-11-23 22:32:27,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:27,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:27,885 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:27,886 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 138 flow. Second operand 4 states and 103 transitions. [2023-11-23 22:32:27,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 73 transitions, 328 flow [2023-11-23 22:32:27,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 73 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:32:27,894 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 150 flow [2023-11-23 22:32:27,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2023-11-23 22:32:27,898 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 8 predicate places. [2023-11-23 22:32:27,898 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 150 flow [2023-11-23 22:32:27,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:27,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:32:27,899 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:27,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 22:32:27,900 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:32:27,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:27,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1857451887, now seen corresponding path program 1 times [2023-11-23 22:32:27,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:27,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248945182] [2023-11-23 22:32:27,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:27,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:32:28,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:28,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248945182] [2023-11-23 22:32:28,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248945182] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:28,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:28,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:32:28,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329625346] [2023-11-23 22:32:28,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:28,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:32:28,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:28,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:32:28,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:32:28,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2023-11-23 22:32:28,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:28,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:32:28,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2023-11-23 22:32:28,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:32:28,876 INFO L124 PetriNetUnfolderBase]: 2194/3436 cut-off events. [2023-11-23 22:32:28,876 INFO L125 PetriNetUnfolderBase]: For 821/821 co-relation queries the response was YES. [2023-11-23 22:32:28,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7636 conditions, 3436 events. 2194/3436 cut-off events. For 821/821 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 19684 event pairs, 1856 based on Foata normal form. 12/2755 useless extension candidates. Maximal degree in co-relation 7626. Up to 2512 conditions per place. [2023-11-23 22:32:28,898 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 39 selfloop transitions, 3 changer transitions 29/78 dead transitions. [2023-11-23 22:32:28,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 78 transitions, 372 flow [2023-11-23 22:32:28,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:32:28,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:32:28,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2023-11-23 22:32:28,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535 [2023-11-23 22:32:28,901 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 107 transitions. [2023-11-23 22:32:28,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 107 transitions. [2023-11-23 22:32:28,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:32:28,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 107 transitions. [2023-11-23 22:32:28,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:28,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:28,903 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:28,904 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 150 flow. Second operand 4 states and 107 transitions. [2023-11-23 22:32:28,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 78 transitions, 372 flow [2023-11-23 22:32:28,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 78 transitions, 364 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-23 22:32:28,908 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 162 flow [2023-11-23 22:32:28,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2023-11-23 22:32:28,909 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 10 predicate places. [2023-11-23 22:32:28,909 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 162 flow [2023-11-23 22:32:28,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:28,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:32:28,910 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:28,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 22:32:28,910 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:32:28,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:28,911 INFO L85 PathProgramCache]: Analyzing trace with hash 65025223, now seen corresponding path program 1 times [2023-11-23 22:32:28,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:28,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377699864] [2023-11-23 22:32:28,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:28,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:32:29,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:29,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377699864] [2023-11-23 22:32:29,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377699864] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:29,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:29,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:32:29,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732466763] [2023-11-23 22:32:29,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:29,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:32:29,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:29,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:32:29,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:32:29,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2023-11-23 22:32:29,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:29,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:32:29,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2023-11-23 22:32:29,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:32:29,715 INFO L124 PetriNetUnfolderBase]: 2157/3371 cut-off events. [2023-11-23 22:32:29,715 INFO L125 PetriNetUnfolderBase]: For 681/681 co-relation queries the response was YES. [2023-11-23 22:32:29,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7428 conditions, 3371 events. 2157/3371 cut-off events. For 681/681 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 19160 event pairs, 1828 based on Foata normal form. 8/2696 useless extension candidates. Maximal degree in co-relation 7417. Up to 2510 conditions per place. [2023-11-23 22:32:29,737 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 37 selfloop transitions, 6 changer transitions 23/73 dead transitions. [2023-11-23 22:32:29,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 73 transitions, 354 flow [2023-11-23 22:32:29,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:32:29,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:32:29,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2023-11-23 22:32:29,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452 [2023-11-23 22:32:29,739 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 113 transitions. [2023-11-23 22:32:29,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 113 transitions. [2023-11-23 22:32:29,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:32:29,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 113 transitions. [2023-11-23 22:32:29,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:29,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:29,741 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:29,741 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 162 flow. Second operand 5 states and 113 transitions. [2023-11-23 22:32:29,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 73 transitions, 354 flow [2023-11-23 22:32:29,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 73 transitions, 344 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-23 22:32:29,746 INFO L231 Difference]: Finished difference. Result has 60 places, 50 transitions, 178 flow [2023-11-23 22:32:29,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2023-11-23 22:32:29,749 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 13 predicate places. [2023-11-23 22:32:29,749 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 178 flow [2023-11-23 22:32:29,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:29,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:32:29,750 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:29,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 22:32:29,750 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:32:29,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:29,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1159307645, now seen corresponding path program 1 times [2023-11-23 22:32:29,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:29,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142560404] [2023-11-23 22:32:29,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:29,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:30,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:32:30,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:30,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142560404] [2023-11-23 22:32:30,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142560404] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:32:30,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068531147] [2023-11-23 22:32:30,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:30,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:32:30,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:32:30,130 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:32:30,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:32:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:30,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:32:30,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:32:30,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:32:30,446 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:32:30,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068531147] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:30,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:32:30,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-23 22:32:30,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587860114] [2023-11-23 22:32:30,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:30,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:32:30,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:30,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:32:30,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:32:30,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2023-11-23 22:32:30,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 178 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:30,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:32:30,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2023-11-23 22:32:30,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:32:31,265 INFO L124 PetriNetUnfolderBase]: 3369/5154 cut-off events. [2023-11-23 22:32:31,265 INFO L125 PetriNetUnfolderBase]: For 1685/1685 co-relation queries the response was YES. [2023-11-23 22:32:31,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11888 conditions, 5154 events. 3369/5154 cut-off events. For 1685/1685 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 28495 event pairs, 1678 based on Foata normal form. 110/4434 useless extension candidates. Maximal degree in co-relation 11876. Up to 1859 conditions per place. [2023-11-23 22:32:31,306 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 82 selfloop transitions, 9 changer transitions 0/98 dead transitions. [2023-11-23 22:32:31,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 98 transitions, 500 flow [2023-11-23 22:32:31,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:32:31,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:32:31,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2023-11-23 22:32:31,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2023-11-23 22:32:31,308 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 124 transitions. [2023-11-23 22:32:31,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 124 transitions. [2023-11-23 22:32:31,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:32:31,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 124 transitions. [2023-11-23 22:32:31,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:31,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:31,310 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:31,310 INFO L175 Difference]: Start difference. First operand has 60 places, 50 transitions, 178 flow. Second operand 4 states and 124 transitions. [2023-11-23 22:32:31,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 98 transitions, 500 flow [2023-11-23 22:32:31,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 98 transitions, 486 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-23 22:32:31,321 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 227 flow [2023-11-23 22:32:31,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=227, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2023-11-23 22:32:31,323 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 15 predicate places. [2023-11-23 22:32:31,323 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 227 flow [2023-11-23 22:32:31,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:31,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:32:31,324 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:31,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 22:32:31,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:32:31,546 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:32:31,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:31,547 INFO L85 PathProgramCache]: Analyzing trace with hash -321190069, now seen corresponding path program 1 times [2023-11-23 22:32:31,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:31,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436529382] [2023-11-23 22:32:31,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:31,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:31,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:31,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:32:31,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:31,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436529382] [2023-11-23 22:32:31,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436529382] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:32:31,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364344832] [2023-11-23 22:32:31,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:31,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:32:31,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:32:31,994 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:32:31,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:32:32,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:32,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 22:32:32,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:32:32,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:32:32,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:32:32,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:32:32,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364344832] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:32:32,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:32:32,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-23 22:32:32,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393641152] [2023-11-23 22:32:32,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:32:32,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 22:32:32,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:32,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 22:32:32,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-23 22:32:32,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2023-11-23 22:32:32,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 227 flow. Second operand has 12 states, 12 states have (on average 14.333333333333334) internal successors, (172), 12 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:32,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:32:32,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2023-11-23 22:32:32,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:32:33,694 INFO L124 PetriNetUnfolderBase]: 3805/5915 cut-off events. [2023-11-23 22:32:33,694 INFO L125 PetriNetUnfolderBase]: For 3296/3296 co-relation queries the response was YES. [2023-11-23 22:32:33,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14918 conditions, 5915 events. 3805/5915 cut-off events. For 3296/3296 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 34357 event pairs, 3137 based on Foata normal form. 2/4911 useless extension candidates. Maximal degree in co-relation 14905. Up to 4931 conditions per place. [2023-11-23 22:32:33,740 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 47 selfloop transitions, 3 changer transitions 42/99 dead transitions. [2023-11-23 22:32:33,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 99 transitions, 544 flow [2023-11-23 22:32:33,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:32:33,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:32:33,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2023-11-23 22:32:33,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4633333333333333 [2023-11-23 22:32:33,742 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 139 transitions. [2023-11-23 22:32:33,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 139 transitions. [2023-11-23 22:32:33,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:32:33,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 139 transitions. [2023-11-23 22:32:33,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:33,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 50.0) internal successors, (350), 7 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:33,745 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 50.0) internal successors, (350), 7 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:33,745 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 227 flow. Second operand 6 states and 139 transitions. [2023-11-23 22:32:33,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 99 transitions, 544 flow [2023-11-23 22:32:33,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 99 transitions, 536 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-11-23 22:32:33,755 INFO L231 Difference]: Finished difference. Result has 70 places, 57 transitions, 241 flow [2023-11-23 22:32:33,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=70, PETRI_TRANSITIONS=57} [2023-11-23 22:32:33,757 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 23 predicate places. [2023-11-23 22:32:33,757 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 57 transitions, 241 flow [2023-11-23 22:32:33,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.333333333333334) internal successors, (172), 12 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:33,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:32:33,757 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:33,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:32:33,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 22:32:33,977 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:32:33,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:33,977 INFO L85 PathProgramCache]: Analyzing trace with hash -827032284, now seen corresponding path program 2 times [2023-11-23 22:32:33,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:33,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800750949] [2023-11-23 22:32:33,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:33,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:34,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 22:32:34,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:34,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800750949] [2023-11-23 22:32:34,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800750949] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:32:34,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221885126] [2023-11-23 22:32:34,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:32:34,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:32:34,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:32:34,351 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:32:34,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:32:34,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:32:34,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:32:34,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:32:34,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:32:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 22:32:34,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:32:34,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 22:32:34,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221885126] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:32:34,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:32:34,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2023-11-23 22:32:34,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17394232] [2023-11-23 22:32:34,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:32:34,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 22:32:34,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:34,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 22:32:34,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:32:34,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2023-11-23 22:32:34,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 57 transitions, 241 flow. Second operand has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:34,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:32:34,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2023-11-23 22:32:34,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:32:36,266 INFO L124 PetriNetUnfolderBase]: 4176/6621 cut-off events. [2023-11-23 22:32:36,266 INFO L125 PetriNetUnfolderBase]: For 4629/4629 co-relation queries the response was YES. [2023-11-23 22:32:36,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16721 conditions, 6621 events. 4176/6621 cut-off events. For 4629/4629 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 39633 event pairs, 3297 based on Foata normal form. 276/5803 useless extension candidates. Maximal degree in co-relation 16704. Up to 4928 conditions per place. [2023-11-23 22:32:36,328 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 45 selfloop transitions, 6 changer transitions 54/112 dead transitions. [2023-11-23 22:32:36,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 112 transitions, 658 flow [2023-11-23 22:32:36,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:32:36,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-23 22:32:36,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2023-11-23 22:32:36,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2023-11-23 22:32:36,330 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 168 transitions. [2023-11-23 22:32:36,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 168 transitions. [2023-11-23 22:32:36,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:32:36,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 168 transitions. [2023-11-23 22:32:36,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:36,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 50.0) internal successors, (450), 9 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:36,334 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 50.0) internal successors, (450), 9 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:36,334 INFO L175 Difference]: Start difference. First operand has 70 places, 57 transitions, 241 flow. Second operand 8 states and 168 transitions. [2023-11-23 22:32:36,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 112 transitions, 658 flow [2023-11-23 22:32:36,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 112 transitions, 640 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-11-23 22:32:36,341 INFO L231 Difference]: Finished difference. Result has 74 places, 58 transitions, 259 flow [2023-11-23 22:32:36,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=259, PETRI_PLACES=74, PETRI_TRANSITIONS=58} [2023-11-23 22:32:36,342 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 27 predicate places. [2023-11-23 22:32:36,342 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 58 transitions, 259 flow [2023-11-23 22:32:36,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:36,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:32:36,343 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:36,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:32:36,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:32:36,557 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:32:36,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:36,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1972956196, now seen corresponding path program 3 times [2023-11-23 22:32:36,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:36,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419716549] [2023-11-23 22:32:36,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:36,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:42,684 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:42,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:42,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419716549] [2023-11-23 22:32:42,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419716549] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:32:42,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664576306] [2023-11-23 22:32:42,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 22:32:42,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:32:42,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:32:42,687 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:32:42,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbcb2901-45c3-4717-a196-98a14ed126e6/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:32:42,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 22:32:42,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:32:42,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-23 22:32:42,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:32:42,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 22:32:43,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:43,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 22:32:43,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:43,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 22:32:43,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:43,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-23 22:32:43,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:43,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 22:32:43,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:43,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-23 22:32:43,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:43,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 22:32:43,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:43,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-23 22:32:43,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:43,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-23 22:32:43,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:43,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 22:32:43,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:43,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-23 22:32:43,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:43,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 22:32:43,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:43,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-23 22:32:43,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:43,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 22:32:43,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:43,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 22:32:43,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:43,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-23 22:32:43,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:43,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-23 22:32:43,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:43,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-23 22:32:43,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:43,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-23 22:32:43,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:43,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 22:32:43,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:43,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-23 22:32:43,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:43,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 22:32:43,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:43,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-23 22:32:43,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:43,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 22:32:43,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-23 22:32:43,515 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-23 22:32:43,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-23 22:32:43,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 22:32:43,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 22:32:43,671 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-23 22:32:43,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-23 22:32:43,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-23 22:32:45,614 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:32:45,615 INFO L327 TraceCheckSpWp]: Computing backward predicates...