./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-easy1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-easy1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI --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 935a7b7fee114f90b65d69dd73b2635844dd9aedca06c4cbc37a4ce046611c9d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:29:41,901 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:29:41,986 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:29:41,991 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:29:41,992 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:29:42,018 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:29:42,019 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:29:42,019 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:29:42,020 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:29:42,021 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:29:42,021 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:29:42,022 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:29:42,023 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:29:42,023 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:29:42,024 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:29:42,024 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:29:42,025 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:29:42,025 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:29:42,026 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:29:42,026 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:29:42,027 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:29:42,028 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:29:42,028 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:29:42,029 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:29:42,029 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:29:42,029 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:29:42,030 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:29:42,030 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:29:42,031 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:29:42,031 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:29:42,031 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:29:42,032 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:29:42,032 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:29:42,033 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:29:42,033 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:29:42,033 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:29:42,034 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:29:42,034 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:29:42,034 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:29:42,035 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:29:42,035 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:29:42,036 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:29:42,036 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_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 935a7b7fee114f90b65d69dd73b2635844dd9aedca06c4cbc37a4ce046611c9d [2023-11-24 21:29:42,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:29:42,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:29:42,371 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:29:42,372 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:29:42,373 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:29:42,374 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/test-easy1.wvr.c [2023-11-24 21:29:45,513 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:29:45,741 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:29:45,741 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/sv-benchmarks/c/weaver/test-easy1.wvr.c [2023-11-24 21:29:45,751 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/data/edd90e20a/122d1a317e224e9d8470b1083127f03c/FLAG1e3a08bd0 [2023-11-24 21:29:45,772 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/data/edd90e20a/122d1a317e224e9d8470b1083127f03c [2023-11-24 21:29:45,776 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:29:45,778 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:29:45,779 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:29:45,780 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:29:45,786 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:29:45,786 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:29:45" (1/1) ... [2023-11-24 21:29:45,788 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@527209f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:45, skipping insertion in model container [2023-11-24 21:29:45,788 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:29:45" (1/1) ... [2023-11-24 21:29:45,818 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:29:45,997 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_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/sv-benchmarks/c/weaver/test-easy1.wvr.c[1902,1915] [2023-11-24 21:29:46,002 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:29:46,013 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:29:46,039 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_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/sv-benchmarks/c/weaver/test-easy1.wvr.c[1902,1915] [2023-11-24 21:29:46,049 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:29:46,071 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:29:46,072 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:46 WrapperNode [2023-11-24 21:29:46,072 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:29:46,074 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:29:46,074 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:29:46,074 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:29:46,082 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:46" (1/1) ... [2023-11-24 21:29:46,094 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:46" (1/1) ... [2023-11-24 21:29:46,128 INFO L138 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2023-11-24 21:29:46,128 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:29:46,129 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:29:46,129 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:29:46,130 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:29:46,142 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:46" (1/1) ... [2023-11-24 21:29:46,142 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:46" (1/1) ... [2023-11-24 21:29:46,145 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:46" (1/1) ... [2023-11-24 21:29:46,170 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-24 21:29:46,170 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:46" (1/1) ... [2023-11-24 21:29:46,170 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:46" (1/1) ... [2023-11-24 21:29:46,175 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:46" (1/1) ... [2023-11-24 21:29:46,179 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:46" (1/1) ... [2023-11-24 21:29:46,181 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:46" (1/1) ... [2023-11-24 21:29:46,182 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:46" (1/1) ... [2023-11-24 21:29:46,185 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:29:46,186 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:29:46,186 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:29:46,186 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:29:46,187 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:46" (1/1) ... [2023-11-24 21:29:46,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:29:46,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:29:46,229 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:29:46,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:29:46,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:29:46,280 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 21:29:46,280 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 21:29:46,280 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 21:29:46,280 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 21:29:46,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:29:46,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:29:46,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:29:46,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:29:46,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:29:46,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:29:46,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:29:46,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:29:46,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:29:46,285 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:29:46,285 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:29:46,285 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:29:46,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:29:46,287 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:29:46,454 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:29:46,457 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:29:46,695 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:29:46,900 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:29:46,900 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 21:29:46,901 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:29:46 BoogieIcfgContainer [2023-11-24 21:29:46,901 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:29:46,904 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:29:46,905 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:29:46,908 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:29:46,909 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:29:45" (1/3) ... [2023-11-24 21:29:46,910 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ae503f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:29:46, skipping insertion in model container [2023-11-24 21:29:46,910 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:46" (2/3) ... [2023-11-24 21:29:46,911 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ae503f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:29:46, skipping insertion in model container [2023-11-24 21:29:46,911 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:29:46" (3/3) ... [2023-11-24 21:29:46,913 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2023-11-24 21:29:46,925 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-24 21:29:46,934 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:29:46,935 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 21:29:46,935 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:29:46,979 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 21:29:47,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 19 transitions, 52 flow [2023-11-24 21:29:47,050 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2023-11-24 21:29:47,050 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:29:47,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 17 events. 2/17 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2023-11-24 21:29:47,053 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 19 transitions, 52 flow [2023-11-24 21:29:47,057 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 16 transitions, 44 flow [2023-11-24 21:29:47,068 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:29:47,076 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;@cd03481, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:29:47,076 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-24 21:29:47,086 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:29:47,087 INFO L124 PetriNetUnfolderBase]: 2/15 cut-off events. [2023-11-24 21:29:47,087 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:29:47,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:29:47,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:29:47,089 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:29:47,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:47,095 INFO L85 PathProgramCache]: Analyzing trace with hash 2017814367, now seen corresponding path program 1 times [2023-11-24 21:29:47,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:47,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31810990] [2023-11-24 21:29:47,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:47,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:47,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:47,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:47,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31810990] [2023-11-24 21:29:47,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31810990] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:29:47,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:29:47,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:29:47,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047433914] [2023-11-24 21:29:47,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:29:47,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:29:47,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:47,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:29:47,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:29:47,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:29:47,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:47,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:29:47,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:29:47,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:29:47,731 INFO L124 PetriNetUnfolderBase]: 65/115 cut-off events. [2023-11-24 21:29:47,731 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-24 21:29:47,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 115 events. 65/115 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 310 event pairs, 9 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-11-24 21:29:47,735 INFO L140 encePairwiseOnDemand]: 15/19 looper letters, 19 selfloop transitions, 3 changer transitions 1/26 dead transitions. [2023-11-24 21:29:47,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 26 transitions, 119 flow [2023-11-24 21:29:47,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:29:47,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:29:47,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 39 transitions. [2023-11-24 21:29:47,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6842105263157895 [2023-11-24 21:29:47,749 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 39 transitions. [2023-11-24 21:29:47,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 39 transitions. [2023-11-24 21:29:47,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:29:47,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 39 transitions. [2023-11-24 21:29:47,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:47,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:47,760 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:47,763 INFO L175 Difference]: Start difference. First operand has 21 places, 16 transitions, 44 flow. Second operand 3 states and 39 transitions. [2023-11-24 21:29:47,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 26 transitions, 119 flow [2023-11-24 21:29:47,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 26 transitions, 105 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:29:47,770 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 55 flow [2023-11-24 21:29:47,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-11-24 21:29:47,776 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-24 21:29:47,777 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 55 flow [2023-11-24 21:29:47,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:47,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:29:47,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:29:47,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:29:47,778 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:29:47,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:47,779 INFO L85 PathProgramCache]: Analyzing trace with hash -996748784, now seen corresponding path program 1 times [2023-11-24 21:29:47,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:47,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012741907] [2023-11-24 21:29:47,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:47,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:47,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:47,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:47,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012741907] [2023-11-24 21:29:47,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012741907] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:29:47,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:29:47,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:29:47,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787457224] [2023-11-24 21:29:47,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:29:47,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:29:47,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:47,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:29:47,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:29:47,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:29:47,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 55 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:47,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:29:47,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:29:47,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:29:48,119 INFO L124 PetriNetUnfolderBase]: 70/133 cut-off events. [2023-11-24 21:29:48,119 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-11-24 21:29:48,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323 conditions, 133 events. 70/133 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 391 event pairs, 9 based on Foata normal form. 4/137 useless extension candidates. Maximal degree in co-relation 121. Up to 68 conditions per place. [2023-11-24 21:29:48,122 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 27 selfloop transitions, 7 changer transitions 0/37 dead transitions. [2023-11-24 21:29:48,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 37 transitions, 177 flow [2023-11-24 21:29:48,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:29:48,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:29:48,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 57 transitions. [2023-11-24 21:29:48,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2023-11-24 21:29:48,125 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 57 transitions. [2023-11-24 21:29:48,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 57 transitions. [2023-11-24 21:29:48,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:29:48,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 57 transitions. [2023-11-24 21:29:48,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 11.4) internal successors, (57), 5 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) [2023-11-24 21:29:48,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:48,128 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:48,128 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 55 flow. Second operand 5 states and 57 transitions. [2023-11-24 21:29:48,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 37 transitions, 177 flow [2023-11-24 21:29:48,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 37 transitions, 173 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:29:48,131 INFO L231 Difference]: Finished difference. Result has 26 places, 24 transitions, 108 flow [2023-11-24 21:29:48,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=26, PETRI_TRANSITIONS=24} [2023-11-24 21:29:48,133 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-11-24 21:29:48,133 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 24 transitions, 108 flow [2023-11-24 21:29:48,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:48,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:29:48,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:29:48,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:29:48,134 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:29:48,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:48,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1836770002, now seen corresponding path program 2 times [2023-11-24 21:29:48,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:48,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307634167] [2023-11-24 21:29:48,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:48,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:48,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:48,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:48,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:48,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307634167] [2023-11-24 21:29:48,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307634167] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:29:48,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861505369] [2023-11-24 21:29:48,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:29:48,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:48,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:29:48,300 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:29:48,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:29:48,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:29:48,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:29:48,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:29:48,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:29:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:48,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:29:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:48,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861505369] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-24 21:29:48,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:29:48,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 6 [2023-11-24 21:29:48,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518262974] [2023-11-24 21:29:48,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:29:48,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:29:48,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:48,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:29:48,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:29:48,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:29:48,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 24 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:48,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:29:48,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:29:48,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:29:48,755 INFO L124 PetriNetUnfolderBase]: 63/124 cut-off events. [2023-11-24 21:29:48,755 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2023-11-24 21:29:48,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 124 events. 63/124 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 363 event pairs, 9 based on Foata normal form. 6/130 useless extension candidates. Maximal degree in co-relation 264. Up to 53 conditions per place. [2023-11-24 21:29:48,758 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 25 selfloop transitions, 8 changer transitions 2/38 dead transitions. [2023-11-24 21:29:48,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 38 transitions, 228 flow [2023-11-24 21:29:48,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:29:48,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:29:48,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 51 transitions. [2023-11-24 21:29:48,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6710526315789473 [2023-11-24 21:29:48,763 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 51 transitions. [2023-11-24 21:29:48,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 51 transitions. [2023-11-24 21:29:48,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:29:48,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 51 transitions. [2023-11-24 21:29:48,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:48,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:48,769 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:48,769 INFO L175 Difference]: Start difference. First operand has 26 places, 24 transitions, 108 flow. Second operand 4 states and 51 transitions. [2023-11-24 21:29:48,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 38 transitions, 228 flow [2023-11-24 21:29:48,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 38 transitions, 228 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:29:48,779 INFO L231 Difference]: Finished difference. Result has 30 places, 23 transitions, 129 flow [2023-11-24 21:29:48,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=30, PETRI_TRANSITIONS=23} [2023-11-24 21:29:48,782 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2023-11-24 21:29:48,783 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 23 transitions, 129 flow [2023-11-24 21:29:48,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:48,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:29:48,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:29:48,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:29:48,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:48,993 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:29:48,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:48,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1484488009, now seen corresponding path program 1 times [2023-11-24 21:29:48,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:48,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775554775] [2023-11-24 21:29:48,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:48,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:49,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:49,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:49,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775554775] [2023-11-24 21:29:49,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775554775] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:29:49,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:29:49,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:29:49,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60145681] [2023-11-24 21:29:49,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:29:49,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:29:49,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:49,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:29:49,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:29:49,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:29:49,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:49,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:29:49,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:29:49,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:29:49,239 INFO L124 PetriNetUnfolderBase]: 61/132 cut-off events. [2023-11-24 21:29:49,239 INFO L125 PetriNetUnfolderBase]: For 302/302 co-relation queries the response was YES. [2023-11-24 21:29:49,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 132 events. 61/132 cut-off events. For 302/302 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 405 event pairs, 7 based on Foata normal form. 8/140 useless extension candidates. Maximal degree in co-relation 230. Up to 50 conditions per place. [2023-11-24 21:29:49,242 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 32 selfloop transitions, 7 changer transitions 3/45 dead transitions. [2023-11-24 21:29:49,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 45 transitions, 305 flow [2023-11-24 21:29:49,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:29:49,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:29:49,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2023-11-24 21:29:49,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6421052631578947 [2023-11-24 21:29:49,244 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 61 transitions. [2023-11-24 21:29:49,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 61 transitions. [2023-11-24 21:29:49,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:29:49,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 61 transitions. [2023-11-24 21:29:49,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:49,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:49,247 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:49,247 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 129 flow. Second operand 5 states and 61 transitions. [2023-11-24 21:29:49,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 45 transitions, 305 flow [2023-11-24 21:29:49,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 45 transitions, 273 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-24 21:29:49,251 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 163 flow [2023-11-24 21:29:49,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=163, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2023-11-24 21:29:49,253 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2023-11-24 21:29:49,253 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 163 flow [2023-11-24 21:29:49,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:49,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:29:49,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:29:49,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:29:49,254 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:29:49,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:49,255 INFO L85 PathProgramCache]: Analyzing trace with hash -868420213, now seen corresponding path program 2 times [2023-11-24 21:29:49,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:49,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221344216] [2023-11-24 21:29:49,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:49,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:49,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:49,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:49,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:49,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221344216] [2023-11-24 21:29:49,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221344216] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:29:49,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:29:49,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:29:49,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858319426] [2023-11-24 21:29:49,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:29:49,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:29:49,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:49,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:29:49,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:29:49,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:29:49,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 163 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:49,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:29:49,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:29:49,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:29:49,398 INFO L124 PetriNetUnfolderBase]: 48/104 cut-off events. [2023-11-24 21:29:49,399 INFO L125 PetriNetUnfolderBase]: For 220/220 co-relation queries the response was YES. [2023-11-24 21:29:49,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418 conditions, 104 events. 48/104 cut-off events. For 220/220 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 250 event pairs, 8 based on Foata normal form. 4/108 useless extension candidates. Maximal degree in co-relation 317. Up to 87 conditions per place. [2023-11-24 21:29:49,401 INFO L140 encePairwiseOnDemand]: 15/19 looper letters, 23 selfloop transitions, 5 changer transitions 0/31 dead transitions. [2023-11-24 21:29:49,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 229 flow [2023-11-24 21:29:49,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:29:49,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:29:49,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2023-11-24 21:29:49,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5657894736842105 [2023-11-24 21:29:49,403 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 43 transitions. [2023-11-24 21:29:49,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 43 transitions. [2023-11-24 21:29:49,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:29:49,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 43 transitions. [2023-11-24 21:29:49,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:49,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:49,405 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:49,405 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 163 flow. Second operand 4 states and 43 transitions. [2023-11-24 21:29:49,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 229 flow [2023-11-24 21:29:49,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 31 transitions, 223 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-24 21:29:49,409 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 165 flow [2023-11-24 21:29:49,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2023-11-24 21:29:49,410 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2023-11-24 21:29:49,411 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 165 flow [2023-11-24 21:29:49,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:49,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:29:49,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:29:49,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:29:49,412 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:29:49,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:49,413 INFO L85 PathProgramCache]: Analyzing trace with hash -981055758, now seen corresponding path program 1 times [2023-11-24 21:29:49,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:49,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076164355] [2023-11-24 21:29:49,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:49,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:49,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:49,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:49,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076164355] [2023-11-24 21:29:49,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076164355] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:29:49,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651659702] [2023-11-24 21:29:49,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:49,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:49,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:29:49,567 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:29:49,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:29:49,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:49,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:29:49,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:29:49,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:49,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:29:49,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:49,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651659702] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:29:49,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:29:49,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 3] total 9 [2023-11-24 21:29:49,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917595695] [2023-11-24 21:29:49,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:29:49,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:29:49,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:49,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:29:49,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:29:49,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:29:49,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 165 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:49,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:29:49,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:29:49,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:29:50,049 INFO L124 PetriNetUnfolderBase]: 123/251 cut-off events. [2023-11-24 21:29:50,049 INFO L125 PetriNetUnfolderBase]: For 577/577 co-relation queries the response was YES. [2023-11-24 21:29:50,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1051 conditions, 251 events. 123/251 cut-off events. For 577/577 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 912 event pairs, 8 based on Foata normal form. 14/265 useless extension candidates. Maximal degree in co-relation 516. Up to 95 conditions per place. [2023-11-24 21:29:50,054 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 46 selfloop transitions, 20 changer transitions 1/70 dead transitions. [2023-11-24 21:29:50,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 70 transitions, 545 flow [2023-11-24 21:29:50,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:29:50,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-24 21:29:50,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2023-11-24 21:29:50,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6691729323308271 [2023-11-24 21:29:50,056 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 89 transitions. [2023-11-24 21:29:50,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 89 transitions. [2023-11-24 21:29:50,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:29:50,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 89 transitions. [2023-11-24 21:29:50,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:50,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:50,058 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:50,058 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 165 flow. Second operand 7 states and 89 transitions. [2023-11-24 21:29:50,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 70 transitions, 545 flow [2023-11-24 21:29:50,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 70 transitions, 522 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-24 21:29:50,064 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 372 flow [2023-11-24 21:29:50,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=372, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-11-24 21:29:50,065 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2023-11-24 21:29:50,065 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 372 flow [2023-11-24 21:29:50,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:50,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:29:50,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:29:50,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:29:50,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:50,272 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:29:50,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:50,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1676370134, now seen corresponding path program 2 times [2023-11-24 21:29:50,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:50,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783266922] [2023-11-24 21:29:50,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:50,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:50,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:50,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:50,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:50,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783266922] [2023-11-24 21:29:50,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783266922] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:29:50,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211452842] [2023-11-24 21:29:50,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:29:50,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:50,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:29:50,413 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:29:50,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:29:50,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:29:50,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:29:50,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:29:50,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:29:50,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:50,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:29:50,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:50,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211452842] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:29:50,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:29:50,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2023-11-24 21:29:50,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930149405] [2023-11-24 21:29:50,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:29:50,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:29:50,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:50,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:29:50,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:29:50,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:29:50,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 372 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:50,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:29:50,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:29:50,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:29:50,850 INFO L124 PetriNetUnfolderBase]: 175/357 cut-off events. [2023-11-24 21:29:50,851 INFO L125 PetriNetUnfolderBase]: For 1560/1560 co-relation queries the response was YES. [2023-11-24 21:29:50,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1776 conditions, 357 events. 175/357 cut-off events. For 1560/1560 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1505 event pairs, 22 based on Foata normal form. 6/363 useless extension candidates. Maximal degree in co-relation 938. Up to 242 conditions per place. [2023-11-24 21:29:50,857 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 56 selfloop transitions, 17 changer transitions 1/77 dead transitions. [2023-11-24 21:29:50,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 77 transitions, 754 flow [2023-11-24 21:29:50,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:29:50,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:29:50,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 75 transitions. [2023-11-24 21:29:50,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6578947368421053 [2023-11-24 21:29:50,860 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 75 transitions. [2023-11-24 21:29:50,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 75 transitions. [2023-11-24 21:29:50,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:29:50,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 75 transitions. [2023-11-24 21:29:50,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:50,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:50,863 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:50,863 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 372 flow. Second operand 6 states and 75 transitions. [2023-11-24 21:29:50,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 77 transitions, 754 flow [2023-11-24 21:29:50,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 709 flow, removed 21 selfloop flow, removed 1 redundant places. [2023-11-24 21:29:50,873 INFO L231 Difference]: Finished difference. Result has 52 places, 54 transitions, 514 flow [2023-11-24 21:29:50,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=514, PETRI_PLACES=52, PETRI_TRANSITIONS=54} [2023-11-24 21:29:50,874 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 31 predicate places. [2023-11-24 21:29:50,874 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 54 transitions, 514 flow [2023-11-24 21:29:50,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:50,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:29:50,875 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:29:50,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:29:51,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:51,081 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:29:51,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:51,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1357969930, now seen corresponding path program 3 times [2023-11-24 21:29:51,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:51,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734316084] [2023-11-24 21:29:51,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:51,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:51,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:51,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:51,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734316084] [2023-11-24 21:29:51,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734316084] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:29:51,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834891509] [2023-11-24 21:29:51,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:29:51,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:51,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:29:51,184 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:29:51,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:29:51,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-24 21:29:51,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:29:51,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:29:51,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:29:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:51,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:29:51,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:51,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834891509] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:29:51,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:29:51,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-24 21:29:51,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768405690] [2023-11-24 21:29:51,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:29:51,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:29:51,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:51,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:29:51,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:29:51,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:29:51,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 54 transitions, 514 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:51,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:29:51,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:29:51,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:29:51,612 INFO L124 PetriNetUnfolderBase]: 190/423 cut-off events. [2023-11-24 21:29:51,612 INFO L125 PetriNetUnfolderBase]: For 2527/2527 co-relation queries the response was YES. [2023-11-24 21:29:51,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2135 conditions, 423 events. 190/423 cut-off events. For 2527/2527 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2047 event pairs, 4 based on Foata normal form. 24/447 useless extension candidates. Maximal degree in co-relation 1340. Up to 174 conditions per place. [2023-11-24 21:29:51,619 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 61 selfloop transitions, 30 changer transitions 7/101 dead transitions. [2023-11-24 21:29:51,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 101 transitions, 1057 flow [2023-11-24 21:29:51,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:29:51,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-24 21:29:51,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2023-11-24 21:29:51,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6023391812865497 [2023-11-24 21:29:51,620 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 103 transitions. [2023-11-24 21:29:51,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 103 transitions. [2023-11-24 21:29:51,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:29:51,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 103 transitions. [2023-11-24 21:29:51,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2023-11-24 21:29:51,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 19.0) internal successors, (190), 10 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:51,623 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 19.0) internal successors, (190), 10 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:51,623 INFO L175 Difference]: Start difference. First operand has 52 places, 54 transitions, 514 flow. Second operand 9 states and 103 transitions. [2023-11-24 21:29:51,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 101 transitions, 1057 flow [2023-11-24 21:29:51,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 101 transitions, 1022 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-11-24 21:29:51,636 INFO L231 Difference]: Finished difference. Result has 64 places, 65 transitions, 769 flow [2023-11-24 21:29:51,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=769, PETRI_PLACES=64, PETRI_TRANSITIONS=65} [2023-11-24 21:29:51,637 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 43 predicate places. [2023-11-24 21:29:51,637 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 769 flow [2023-11-24 21:29:51,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:51,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:29:51,637 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:29:51,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:29:51,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-24 21:29:51,843 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:29:51,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:51,844 INFO L85 PathProgramCache]: Analyzing trace with hash 125095724, now seen corresponding path program 4 times [2023-11-24 21:29:51,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:51,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075322864] [2023-11-24 21:29:51,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:51,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:51,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:51,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:51,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:51,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075322864] [2023-11-24 21:29:51,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075322864] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:29:51,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644379249] [2023-11-24 21:29:51,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:29:51,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:51,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:29:51,925 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:29:51,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:29:52,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:29:52,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:29:52,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:29:52,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:29:52,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:52,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:29:52,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:52,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644379249] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:29:52,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:29:52,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-11-24 21:29:52,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011831910] [2023-11-24 21:29:52,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:29:52,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:29:52,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:52,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:29:52,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:29:52,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:29:52,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 65 transitions, 769 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:52,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:29:52,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:29:52,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:29:52,429 INFO L124 PetriNetUnfolderBase]: 183/423 cut-off events. [2023-11-24 21:29:52,429 INFO L125 PetriNetUnfolderBase]: For 3548/3548 co-relation queries the response was YES. [2023-11-24 21:29:52,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2443 conditions, 423 events. 183/423 cut-off events. For 3548/3548 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2113 event pairs, 8 based on Foata normal form. 4/427 useless extension candidates. Maximal degree in co-relation 2059. Up to 119 conditions per place. [2023-11-24 21:29:52,436 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 64 selfloop transitions, 45 changer transitions 0/112 dead transitions. [2023-11-24 21:29:52,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 112 transitions, 1318 flow [2023-11-24 21:29:52,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:29:52,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-24 21:29:52,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2023-11-24 21:29:52,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5885167464114832 [2023-11-24 21:29:52,438 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 123 transitions. [2023-11-24 21:29:52,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 123 transitions. [2023-11-24 21:29:52,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:29:52,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 123 transitions. [2023-11-24 21:29:52,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:52,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 19.0) internal successors, (228), 12 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:52,442 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 19.0) internal successors, (228), 12 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:52,442 INFO L175 Difference]: Start difference. First operand has 64 places, 65 transitions, 769 flow. Second operand 11 states and 123 transitions. [2023-11-24 21:29:52,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 112 transitions, 1318 flow [2023-11-24 21:29:52,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 112 transitions, 1225 flow, removed 45 selfloop flow, removed 1 redundant places. [2023-11-24 21:29:52,465 INFO L231 Difference]: Finished difference. Result has 77 places, 74 transitions, 991 flow [2023-11-24 21:29:52,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=991, PETRI_PLACES=77, PETRI_TRANSITIONS=74} [2023-11-24 21:29:52,467 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 56 predicate places. [2023-11-24 21:29:52,467 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 74 transitions, 991 flow [2023-11-24 21:29:52,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:52,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:29:52,467 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:29:52,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:29:52,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-24 21:29:52,673 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:29:52,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:52,673 INFO L85 PathProgramCache]: Analyzing trace with hash 35632105, now seen corresponding path program 5 times [2023-11-24 21:29:52,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:52,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666739379] [2023-11-24 21:29:52,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:52,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:52,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:52,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:52,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666739379] [2023-11-24 21:29:52,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666739379] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:29:52,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654610240] [2023-11-24 21:29:52,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 21:29:52,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:52,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:29:52,760 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:29:52,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:29:52,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-24 21:29:52,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:29:52,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:29:52,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:29:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:52,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:29:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:52,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654610240] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:29:52,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:29:52,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-11-24 21:29:52,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088002193] [2023-11-24 21:29:52,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:29:52,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:29:52,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:52,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:29:52,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:29:52,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:29:52,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 74 transitions, 991 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:52,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:29:52,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:29:52,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:29:53,233 INFO L124 PetriNetUnfolderBase]: 173/386 cut-off events. [2023-11-24 21:29:53,233 INFO L125 PetriNetUnfolderBase]: For 3533/3533 co-relation queries the response was YES. [2023-11-24 21:29:53,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2337 conditions, 386 events. 173/386 cut-off events. For 3533/3533 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1799 event pairs, 4 based on Foata normal form. 4/390 useless extension candidates. Maximal degree in co-relation 2036. Up to 112 conditions per place. [2023-11-24 21:29:53,240 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 70 selfloop transitions, 25 changer transitions 6/104 dead transitions. [2023-11-24 21:29:53,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 104 transitions, 1401 flow [2023-11-24 21:29:53,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:29:53,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-24 21:29:53,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 103 transitions. [2023-11-24 21:29:53,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5421052631578948 [2023-11-24 21:29:53,242 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 103 transitions. [2023-11-24 21:29:53,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 103 transitions. [2023-11-24 21:29:53,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:29:53,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 103 transitions. [2023-11-24 21:29:53,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2023-11-24 21:29:53,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 19.0) internal successors, (209), 11 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:53,245 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 19.0) internal successors, (209), 11 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:53,245 INFO L175 Difference]: Start difference. First operand has 77 places, 74 transitions, 991 flow. Second operand 10 states and 103 transitions. [2023-11-24 21:29:53,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 104 transitions, 1401 flow [2023-11-24 21:29:53,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 104 transitions, 1298 flow, removed 39 selfloop flow, removed 5 redundant places. [2023-11-24 21:29:53,270 INFO L231 Difference]: Finished difference. Result has 83 places, 73 transitions, 955 flow [2023-11-24 21:29:53,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=955, PETRI_PLACES=83, PETRI_TRANSITIONS=73} [2023-11-24 21:29:53,274 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 62 predicate places. [2023-11-24 21:29:53,274 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 73 transitions, 955 flow [2023-11-24 21:29:53,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:53,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:29:53,275 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:29:53,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:29:53,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:53,482 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:29:53,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:53,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1493875726, now seen corresponding path program 6 times [2023-11-24 21:29:53,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:53,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113332585] [2023-11-24 21:29:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:53,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:53,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:53,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:53,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113332585] [2023-11-24 21:29:53,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113332585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:29:53,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656693172] [2023-11-24 21:29:53,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-24 21:29:53,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:53,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:29:53,576 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:29:53,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:29:53,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-24 21:29:53,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:29:53,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:29:53,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:29:53,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:53,755 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:29:53,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:53,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656693172] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:29:53,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:29:53,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-24 21:29:53,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627653254] [2023-11-24 21:29:53,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:29:53,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:29:53,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:53,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:29:53,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:29:53,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:29:53,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 73 transitions, 955 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:53,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:29:53,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:29:53,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:29:54,103 INFO L124 PetriNetUnfolderBase]: 197/441 cut-off events. [2023-11-24 21:29:54,103 INFO L125 PetriNetUnfolderBase]: For 4032/4032 co-relation queries the response was YES. [2023-11-24 21:29:54,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2630 conditions, 441 events. 197/441 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2093 event pairs, 6 based on Foata normal form. 10/451 useless extension candidates. Maximal degree in co-relation 2200. Up to 190 conditions per place. [2023-11-24 21:29:54,113 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 74 selfloop transitions, 48 changer transitions 0/125 dead transitions. [2023-11-24 21:29:54,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 125 transitions, 1700 flow [2023-11-24 21:29:54,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:29:54,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-24 21:29:54,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 125 transitions. [2023-11-24 21:29:54,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5482456140350878 [2023-11-24 21:29:54,115 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 125 transitions. [2023-11-24 21:29:54,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 125 transitions. [2023-11-24 21:29:54,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:29:54,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 125 transitions. [2023-11-24 21:29:54,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:54,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 19.0) internal successors, (247), 13 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:54,118 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 19.0) internal successors, (247), 13 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:54,118 INFO L175 Difference]: Start difference. First operand has 83 places, 73 transitions, 955 flow. Second operand 12 states and 125 transitions. [2023-11-24 21:29:54,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 125 transitions, 1700 flow [2023-11-24 21:29:54,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 125 transitions, 1550 flow, removed 47 selfloop flow, removed 6 redundant places. [2023-11-24 21:29:54,143 INFO L231 Difference]: Finished difference. Result has 94 places, 97 transitions, 1341 flow [2023-11-24 21:29:54,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=834, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1341, PETRI_PLACES=94, PETRI_TRANSITIONS=97} [2023-11-24 21:29:54,144 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 73 predicate places. [2023-11-24 21:29:54,144 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 97 transitions, 1341 flow [2023-11-24 21:29:54,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:54,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:29:54,145 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:29:54,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:29:54,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:54,351 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:29:54,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:54,352 INFO L85 PathProgramCache]: Analyzing trace with hash -537405541, now seen corresponding path program 7 times [2023-11-24 21:29:54,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:54,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043566190] [2023-11-24 21:29:54,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:54,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:54,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:54,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:54,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043566190] [2023-11-24 21:29:54,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043566190] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:29:54,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878659758] [2023-11-24 21:29:54,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-24 21:29:54,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:54,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:29:54,437 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:29:54,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 21:29:54,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:54,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:29:54,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:29:54,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:54,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:29:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:54,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878659758] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:29:54,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:29:54,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-11-24 21:29:54,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146577698] [2023-11-24 21:29:54,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:29:54,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:29:54,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:54,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:29:54,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:29:54,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:29:54,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 97 transitions, 1341 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:54,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:29:54,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:29:54,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:29:55,006 INFO L124 PetriNetUnfolderBase]: 263/598 cut-off events. [2023-11-24 21:29:55,006 INFO L125 PetriNetUnfolderBase]: For 5708/5708 co-relation queries the response was YES. [2023-11-24 21:29:55,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3750 conditions, 598 events. 263/598 cut-off events. For 5708/5708 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3184 event pairs, 4 based on Foata normal form. 6/604 useless extension candidates. Maximal degree in co-relation 3086. Up to 157 conditions per place. [2023-11-24 21:29:55,015 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 105 selfloop transitions, 63 changer transitions 2/173 dead transitions. [2023-11-24 21:29:55,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 173 transitions, 2379 flow [2023-11-24 21:29:55,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:29:55,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-24 21:29:55,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2023-11-24 21:29:55,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6172248803827751 [2023-11-24 21:29:55,018 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 129 transitions. [2023-11-24 21:29:55,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 129 transitions. [2023-11-24 21:29:55,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:29:55,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 129 transitions. [2023-11-24 21:29:55,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 11.727272727272727) internal successors, (129), 11 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:55,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 19.0) internal successors, (228), 12 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:55,020 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 19.0) internal successors, (228), 12 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:55,020 INFO L175 Difference]: Start difference. First operand has 94 places, 97 transitions, 1341 flow. Second operand 11 states and 129 transitions. [2023-11-24 21:29:55,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 173 transitions, 2379 flow [2023-11-24 21:29:55,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 173 transitions, 2251 flow, removed 58 selfloop flow, removed 3 redundant places. [2023-11-24 21:29:55,059 INFO L231 Difference]: Finished difference. Result has 106 places, 125 transitions, 1912 flow [2023-11-24 21:29:55,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1912, PETRI_PLACES=106, PETRI_TRANSITIONS=125} [2023-11-24 21:29:55,062 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 85 predicate places. [2023-11-24 21:29:55,062 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 125 transitions, 1912 flow [2023-11-24 21:29:55,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:55,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:29:55,063 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:29:55,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 21:29:55,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:55,275 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:29:55,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:55,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1184150161, now seen corresponding path program 8 times [2023-11-24 21:29:55,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:55,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504299477] [2023-11-24 21:29:55,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:55,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:29:55,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:55,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504299477] [2023-11-24 21:29:55,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504299477] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:29:55,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162350570] [2023-11-24 21:29:55,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:29:55,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:55,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:29:55,352 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:29:55,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 21:29:55,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:29:55,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:29:55,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:29:55,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:29:55,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:55,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:29:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:55,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162350570] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:29:55,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:29:55,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-11-24 21:29:55,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017038991] [2023-11-24 21:29:55,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:29:55,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:29:55,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:55,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:29:55,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:29:55,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:29:55,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 125 transitions, 1912 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:55,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:29:55,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:29:55,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:29:55,907 INFO L124 PetriNetUnfolderBase]: 256/577 cut-off events. [2023-11-24 21:29:55,907 INFO L125 PetriNetUnfolderBase]: For 6987/6987 co-relation queries the response was YES. [2023-11-24 21:29:55,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3980 conditions, 577 events. 256/577 cut-off events. For 6987/6987 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3001 event pairs, 22 based on Foata normal form. 4/581 useless extension candidates. Maximal degree in co-relation 3294. Up to 210 conditions per place. [2023-11-24 21:29:55,918 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 98 selfloop transitions, 50 changer transitions 2/153 dead transitions. [2023-11-24 21:29:55,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 153 transitions, 2467 flow [2023-11-24 21:29:55,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:29:55,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-24 21:29:55,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2023-11-24 21:29:55,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5672514619883041 [2023-11-24 21:29:55,920 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 97 transitions. [2023-11-24 21:29:55,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 97 transitions. [2023-11-24 21:29:55,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:29:55,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 97 transitions. [2023-11-24 21:29:55,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:55,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 19.0) internal successors, (190), 10 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:55,923 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 19.0) internal successors, (190), 10 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:55,923 INFO L175 Difference]: Start difference. First operand has 106 places, 125 transitions, 1912 flow. Second operand 9 states and 97 transitions. [2023-11-24 21:29:55,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 153 transitions, 2467 flow [2023-11-24 21:29:55,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 153 transitions, 2310 flow, removed 77 selfloop flow, removed 1 redundant places. [2023-11-24 21:29:55,972 INFO L231 Difference]: Finished difference. Result has 115 places, 127 transitions, 1974 flow [2023-11-24 21:29:55,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1747, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1974, PETRI_PLACES=115, PETRI_TRANSITIONS=127} [2023-11-24 21:29:55,974 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 94 predicate places. [2023-11-24 21:29:55,974 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 127 transitions, 1974 flow [2023-11-24 21:29:55,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:55,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:29:55,975 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:29:55,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 21:29:56,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-24 21:29:56,181 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:29:56,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:56,181 INFO L85 PathProgramCache]: Analyzing trace with hash -132007143, now seen corresponding path program 9 times [2023-11-24 21:29:56,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:56,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605846758] [2023-11-24 21:29:56,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:56,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:56,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:56,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605846758] [2023-11-24 21:29:56,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605846758] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:29:56,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296283949] [2023-11-24 21:29:56,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:29:56,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:56,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:29:56,269 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:29:56,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 21:29:56,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-24 21:29:56,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:29:56,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:29:56,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:29:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:56,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:29:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:56,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296283949] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:29:56,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:29:56,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-24 21:29:56,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605723679] [2023-11-24 21:29:56,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:29:56,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:29:56,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:56,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:29:56,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:29:56,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:29:56,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 127 transitions, 1974 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:56,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:29:56,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:29:56,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:29:56,758 INFO L124 PetriNetUnfolderBase]: 247/557 cut-off events. [2023-11-24 21:29:56,758 INFO L125 PetriNetUnfolderBase]: For 6636/6636 co-relation queries the response was YES. [2023-11-24 21:29:56,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3849 conditions, 557 events. 247/557 cut-off events. For 6636/6636 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2870 event pairs, 24 based on Foata normal form. 4/561 useless extension candidates. Maximal degree in co-relation 3260. Up to 206 conditions per place. [2023-11-24 21:29:56,767 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 97 selfloop transitions, 45 changer transitions 5/150 dead transitions. [2023-11-24 21:29:56,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 150 transitions, 2430 flow [2023-11-24 21:29:56,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:29:56,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-24 21:29:56,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2023-11-24 21:29:56,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5672514619883041 [2023-11-24 21:29:56,769 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 97 transitions. [2023-11-24 21:29:56,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 97 transitions. [2023-11-24 21:29:56,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:29:56,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 97 transitions. [2023-11-24 21:29:56,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:56,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 19.0) internal successors, (190), 10 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:56,772 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 19.0) internal successors, (190), 10 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:56,772 INFO L175 Difference]: Start difference. First operand has 115 places, 127 transitions, 1974 flow. Second operand 9 states and 97 transitions. [2023-11-24 21:29:56,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 150 transitions, 2430 flow [2023-11-24 21:29:56,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 150 transitions, 2359 flow, removed 13 selfloop flow, removed 5 redundant places. [2023-11-24 21:29:56,817 INFO L231 Difference]: Finished difference. Result has 118 places, 121 transitions, 1901 flow [2023-11-24 21:29:56,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1878, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1901, PETRI_PLACES=118, PETRI_TRANSITIONS=121} [2023-11-24 21:29:56,818 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 97 predicate places. [2023-11-24 21:29:56,818 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 121 transitions, 1901 flow [2023-11-24 21:29:56,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:56,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:29:56,819 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:29:56,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-24 21:29:57,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-24 21:29:57,024 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:29:57,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:57,024 INFO L85 PathProgramCache]: Analyzing trace with hash -456275256, now seen corresponding path program 10 times [2023-11-24 21:29:57,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:57,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259870117] [2023-11-24 21:29:57,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:57,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:57,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:57,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:57,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259870117] [2023-11-24 21:29:57,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259870117] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:29:57,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461849589] [2023-11-24 21:29:57,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:29:57,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:57,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:29:57,122 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:29:57,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-24 21:29:57,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:29:57,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:29:57,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:29:57,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:29:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:57,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:29:57,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:57,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461849589] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:29:57,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:29:57,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-11-24 21:29:57,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502788416] [2023-11-24 21:29:57,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:29:57,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:29:57,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:57,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:29:57,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:29:57,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:29:57,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 121 transitions, 1901 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:57,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:29:57,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:29:57,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:29:57,616 INFO L124 PetriNetUnfolderBase]: 230/512 cut-off events. [2023-11-24 21:29:57,617 INFO L125 PetriNetUnfolderBase]: For 6636/6636 co-relation queries the response was YES. [2023-11-24 21:29:57,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3583 conditions, 512 events. 230/512 cut-off events. For 6636/6636 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2540 event pairs, 14 based on Foata normal form. 8/520 useless extension candidates. Maximal degree in co-relation 3157. Up to 210 conditions per place. [2023-11-24 21:29:57,625 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 93 selfloop transitions, 41 changer transitions 1/138 dead transitions. [2023-11-24 21:29:57,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 138 transitions, 2270 flow [2023-11-24 21:29:57,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:29:57,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-24 21:29:57,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2023-11-24 21:29:57,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210526315789473 [2023-11-24 21:29:57,627 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 99 transitions. [2023-11-24 21:29:57,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 99 transitions. [2023-11-24 21:29:57,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:29:57,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 99 transitions. [2023-11-24 21:29:57,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:57,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 19.0) internal successors, (209), 11 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:57,630 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 19.0) internal successors, (209), 11 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:57,630 INFO L175 Difference]: Start difference. First operand has 118 places, 121 transitions, 1901 flow. Second operand 10 states and 99 transitions. [2023-11-24 21:29:57,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 138 transitions, 2270 flow [2023-11-24 21:29:57,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 138 transitions, 2201 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-11-24 21:29:57,673 INFO L231 Difference]: Finished difference. Result has 123 places, 117 transitions, 1850 flow [2023-11-24 21:29:57,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1765, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1850, PETRI_PLACES=123, PETRI_TRANSITIONS=117} [2023-11-24 21:29:57,674 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 102 predicate places. [2023-11-24 21:29:57,674 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 117 transitions, 1850 flow [2023-11-24 21:29:57,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:57,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:29:57,675 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:29:57,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-24 21:29:57,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-24 21:29:57,881 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:29:57,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:57,881 INFO L85 PathProgramCache]: Analyzing trace with hash 434649007, now seen corresponding path program 11 times [2023-11-24 21:29:57,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:57,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354293097] [2023-11-24 21:29:57,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:57,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:58,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:58,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354293097] [2023-11-24 21:29:58,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354293097] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:29:58,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774422653] [2023-11-24 21:29:58,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 21:29:58,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:58,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:29:58,057 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:29:58,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-24 21:29:58,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:29:58,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:29:58,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:29:58,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:29:58,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:58,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:29:58,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:58,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774422653] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:29:58,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:29:58,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 14 [2023-11-24 21:29:58,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89473004] [2023-11-24 21:29:58,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:29:58,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:29:58,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:58,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:29:58,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:29:58,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:29:58,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 117 transitions, 1850 flow. Second operand has 15 states, 15 states have (on average 7.866666666666666) internal successors, (118), 15 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:58,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:29:58,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:29:58,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:29:58,777 INFO L124 PetriNetUnfolderBase]: 365/774 cut-off events. [2023-11-24 21:29:58,778 INFO L125 PetriNetUnfolderBase]: For 13477/13477 co-relation queries the response was YES. [2023-11-24 21:29:58,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5638 conditions, 774 events. 365/774 cut-off events. For 13477/13477 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4195 event pairs, 23 based on Foata normal form. 35/809 useless extension candidates. Maximal degree in co-relation 5195. Up to 413 conditions per place. [2023-11-24 21:29:58,790 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 139 selfloop transitions, 55 changer transitions 3/200 dead transitions. [2023-11-24 21:29:58,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 200 transitions, 3266 flow [2023-11-24 21:29:58,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:29:58,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-24 21:29:58,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2023-11-24 21:29:58,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6578947368421053 [2023-11-24 21:29:58,793 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 125 transitions. [2023-11-24 21:29:58,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 125 transitions. [2023-11-24 21:29:58,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:29:58,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 125 transitions. [2023-11-24 21:29:58,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:58,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 19.0) internal successors, (209), 11 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:58,795 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 19.0) internal successors, (209), 11 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:58,795 INFO L175 Difference]: Start difference. First operand has 123 places, 117 transitions, 1850 flow. Second operand 10 states and 125 transitions. [2023-11-24 21:29:58,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 200 transitions, 3266 flow [2023-11-24 21:29:58,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 200 transitions, 3174 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-11-24 21:29:58,859 INFO L231 Difference]: Finished difference. Result has 134 places, 154 transitions, 2638 flow [2023-11-24 21:29:58,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1779, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2638, PETRI_PLACES=134, PETRI_TRANSITIONS=154} [2023-11-24 21:29:58,861 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 113 predicate places. [2023-11-24 21:29:58,861 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 154 transitions, 2638 flow [2023-11-24 21:29:58,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.866666666666666) internal successors, (118), 15 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:58,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:29:58,862 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:29:58,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-24 21:29:59,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-24 21:29:59,068 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:29:59,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:59,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1343642123, now seen corresponding path program 12 times [2023-11-24 21:29:59,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:59,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835797357] [2023-11-24 21:29:59,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:59,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:59,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:59,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:59,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835797357] [2023-11-24 21:29:59,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835797357] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:29:59,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995040639] [2023-11-24 21:29:59,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-24 21:29:59,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:59,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:29:59,194 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:29:59,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-24 21:29:59,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-24 21:29:59,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:29:59,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:29:59,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:29:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:59,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:29:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:29:59,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995040639] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:29:59,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:29:59,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 10 [2023-11-24 21:29:59,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834161427] [2023-11-24 21:29:59,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:29:59,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:29:59,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:59,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:29:59,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:29:59,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:29:59,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 154 transitions, 2638 flow. Second operand has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 11 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:59,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:29:59,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:29:59,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:29:59,959 INFO L124 PetriNetUnfolderBase]: 547/1162 cut-off events. [2023-11-24 21:29:59,959 INFO L125 PetriNetUnfolderBase]: For 23927/23927 co-relation queries the response was YES. [2023-11-24 21:29:59,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9288 conditions, 1162 events. 547/1162 cut-off events. For 23927/23927 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 7082 event pairs, 56 based on Foata normal form. 17/1179 useless extension candidates. Maximal degree in co-relation 8738. Up to 721 conditions per place. [2023-11-24 21:29:59,980 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 179 selfloop transitions, 79 changer transitions 7/268 dead transitions. [2023-11-24 21:29:59,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 268 transitions, 4989 flow [2023-11-24 21:29:59,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:29:59,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-24 21:29:59,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2023-11-24 21:29:59,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2023-11-24 21:29:59,981 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 133 transitions. [2023-11-24 21:29:59,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 133 transitions. [2023-11-24 21:29:59,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:29:59,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 133 transitions. [2023-11-24 21:29:59,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 12.090909090909092) internal successors, (133), 11 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:59,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 19.0) internal successors, (228), 12 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:59,984 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 19.0) internal successors, (228), 12 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:59,984 INFO L175 Difference]: Start difference. First operand has 134 places, 154 transitions, 2638 flow. Second operand 11 states and 133 transitions. [2023-11-24 21:29:59,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 268 transitions, 4989 flow [2023-11-24 21:30:00,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 268 transitions, 4800 flow, removed 91 selfloop flow, removed 1 redundant places. [2023-11-24 21:30:00,110 INFO L231 Difference]: Finished difference. Result has 150 places, 217 transitions, 4149 flow [2023-11-24 21:30:00,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=2459, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4149, PETRI_PLACES=150, PETRI_TRANSITIONS=217} [2023-11-24 21:30:00,111 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 129 predicate places. [2023-11-24 21:30:00,111 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 217 transitions, 4149 flow [2023-11-24 21:30:00,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 11 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:00,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:30:00,112 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:00,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-24 21:30:00,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-24 21:30:00,318 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:30:00,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:00,318 INFO L85 PathProgramCache]: Analyzing trace with hash 747386425, now seen corresponding path program 13 times [2023-11-24 21:30:00,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:00,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222063913] [2023-11-24 21:30:00,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:00,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:00,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:00,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:00,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222063913] [2023-11-24 21:30:00,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222063913] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:00,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17842387] [2023-11-24 21:30:00,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-24 21:30:00,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:00,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:00,463 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:00,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-24 21:30:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:00,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:30:00,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:00,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:00,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:30:00,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:30:00,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17842387] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:30:00,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:30:00,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 14 [2023-11-24 21:30:00,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470882407] [2023-11-24 21:30:00,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:30:00,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:30:00,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:00,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:30:00,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:30:00,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:30:00,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 217 transitions, 4149 flow. Second operand has 15 states, 15 states have (on average 7.733333333333333) internal successors, (116), 15 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:00,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:30:00,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:30:00,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:30:01,410 INFO L124 PetriNetUnfolderBase]: 649/1348 cut-off events. [2023-11-24 21:30:01,411 INFO L125 PetriNetUnfolderBase]: For 36310/36310 co-relation queries the response was YES. [2023-11-24 21:30:01,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11645 conditions, 1348 events. 649/1348 cut-off events. For 36310/36310 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8352 event pairs, 85 based on Foata normal form. 36/1384 useless extension candidates. Maximal degree in co-relation 11065. Up to 1018 conditions per place. [2023-11-24 21:30:01,448 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 221 selfloop transitions, 67 changer transitions 5/296 dead transitions. [2023-11-24 21:30:01,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 296 transitions, 6014 flow [2023-11-24 21:30:01,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:30:01,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-24 21:30:01,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2023-11-24 21:30:01,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6157894736842106 [2023-11-24 21:30:01,450 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 117 transitions. [2023-11-24 21:30:01,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 117 transitions. [2023-11-24 21:30:01,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:30:01,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 117 transitions. [2023-11-24 21:30:01,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:01,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 19.0) internal successors, (209), 11 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:01,452 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 19.0) internal successors, (209), 11 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:01,453 INFO L175 Difference]: Start difference. First operand has 150 places, 217 transitions, 4149 flow. Second operand 10 states and 117 transitions. [2023-11-24 21:30:01,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 296 transitions, 6014 flow [2023-11-24 21:30:01,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 296 transitions, 5313 flow, removed 319 selfloop flow, removed 2 redundant places. [2023-11-24 21:30:01,641 INFO L231 Difference]: Finished difference. Result has 162 places, 254 transitions, 4490 flow [2023-11-24 21:30:01,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=3472, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4490, PETRI_PLACES=162, PETRI_TRANSITIONS=254} [2023-11-24 21:30:01,643 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 141 predicate places. [2023-11-24 21:30:01,643 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 254 transitions, 4490 flow [2023-11-24 21:30:01,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.733333333333333) internal successors, (116), 15 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:01,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:30:01,643 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:01,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-24 21:30:01,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-24 21:30:01,849 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:30:01,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:01,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1760013907, now seen corresponding path program 14 times [2023-11-24 21:30:01,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:01,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434496898] [2023-11-24 21:30:01,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:01,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:01,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:01,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:01,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434496898] [2023-11-24 21:30:01,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434496898] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:01,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412248174] [2023-11-24 21:30:01,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:30:01,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:01,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:01,998 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:02,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-24 21:30:02,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:30:02,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:30:02,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:30:02,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:02,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:02,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:30:02,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:02,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412248174] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:30:02,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:30:02,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-24 21:30:02,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390733439] [2023-11-24 21:30:02,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:30:02,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:30:02,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:02,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:30:02,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:30:02,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:30:02,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 254 transitions, 4490 flow. Second operand has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:02,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:30:02,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:30:02,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:30:02,923 INFO L124 PetriNetUnfolderBase]: 665/1436 cut-off events. [2023-11-24 21:30:02,923 INFO L125 PetriNetUnfolderBase]: For 43107/43107 co-relation queries the response was YES. [2023-11-24 21:30:02,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12078 conditions, 1436 events. 665/1436 cut-off events. For 43107/43107 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 9327 event pairs, 14 based on Foata normal form. 40/1476 useless extension candidates. Maximal degree in co-relation 11711. Up to 512 conditions per place. [2023-11-24 21:30:02,942 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 160 selfloop transitions, 152 changer transitions 19/334 dead transitions. [2023-11-24 21:30:02,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 334 transitions, 6499 flow [2023-11-24 21:30:02,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:30:02,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-24 21:30:02,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2023-11-24 21:30:02,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6008771929824561 [2023-11-24 21:30:02,944 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 137 transitions. [2023-11-24 21:30:02,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 137 transitions. [2023-11-24 21:30:02,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:30:02,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 137 transitions. [2023-11-24 21:30:02,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 11.416666666666666) internal successors, (137), 12 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:02,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 19.0) internal successors, (247), 13 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:02,946 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 19.0) internal successors, (247), 13 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:02,946 INFO L175 Difference]: Start difference. First operand has 162 places, 254 transitions, 4490 flow. Second operand 12 states and 137 transitions. [2023-11-24 21:30:02,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 334 transitions, 6499 flow [2023-11-24 21:30:03,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 334 transitions, 6122 flow, removed 177 selfloop flow, removed 5 redundant places. [2023-11-24 21:30:03,121 INFO L231 Difference]: Finished difference. Result has 174 places, 271 transitions, 5406 flow [2023-11-24 21:30:03,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4165, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5406, PETRI_PLACES=174, PETRI_TRANSITIONS=271} [2023-11-24 21:30:03,122 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 153 predicate places. [2023-11-24 21:30:03,122 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 271 transitions, 5406 flow [2023-11-24 21:30:03,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:03,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:30:03,122 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:03,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-24 21:30:03,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:03,328 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:30:03,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:03,328 INFO L85 PathProgramCache]: Analyzing trace with hash -4446129, now seen corresponding path program 15 times [2023-11-24 21:30:03,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:03,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936746439] [2023-11-24 21:30:03,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:03,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:03,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:03,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:03,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:03,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936746439] [2023-11-24 21:30:03,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936746439] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:03,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142903581] [2023-11-24 21:30:03,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:30:03,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:03,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:03,429 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:03,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-24 21:30:03,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-24 21:30:03,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:30:03,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:30:03,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:03,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 21:30:03,590 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:30:03,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142903581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:30:03,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:30:03,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2023-11-24 21:30:03,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093447010] [2023-11-24 21:30:03,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:30:03,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:30:03,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:03,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:30:03,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:30:03,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:30:03,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 271 transitions, 5406 flow. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:03,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:30:03,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:30:03,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:30:04,312 INFO L124 PetriNetUnfolderBase]: 679/1536 cut-off events. [2023-11-24 21:30:04,313 INFO L125 PetriNetUnfolderBase]: For 50972/50972 co-relation queries the response was YES. [2023-11-24 21:30:04,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13583 conditions, 1536 events. 679/1536 cut-off events. For 50972/50972 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 10733 event pairs, 31 based on Foata normal form. 20/1556 useless extension candidates. Maximal degree in co-relation 12584. Up to 633 conditions per place. [2023-11-24 21:30:04,336 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 213 selfloop transitions, 33 changer transitions 85/334 dead transitions. [2023-11-24 21:30:04,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 334 transitions, 7174 flow [2023-11-24 21:30:04,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:30:04,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:30:04,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 68 transitions. [2023-11-24 21:30:04,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964912280701754 [2023-11-24 21:30:04,338 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 68 transitions. [2023-11-24 21:30:04,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 68 transitions. [2023-11-24 21:30:04,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:30:04,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 68 transitions. [2023-11-24 21:30:04,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:04,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:04,339 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:04,340 INFO L175 Difference]: Start difference. First operand has 174 places, 271 transitions, 5406 flow. Second operand 6 states and 68 transitions. [2023-11-24 21:30:04,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 334 transitions, 7174 flow [2023-11-24 21:30:04,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 334 transitions, 6609 flow, removed 281 selfloop flow, removed 1 redundant places. [2023-11-24 21:30:04,624 INFO L231 Difference]: Finished difference. Result has 182 places, 222 transitions, 4278 flow [2023-11-24 21:30:04,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4969, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4278, PETRI_PLACES=182, PETRI_TRANSITIONS=222} [2023-11-24 21:30:04,625 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 161 predicate places. [2023-11-24 21:30:04,625 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 222 transitions, 4278 flow [2023-11-24 21:30:04,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:04,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:30:04,625 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:04,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-24 21:30:04,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:04,826 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:30:04,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:04,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1835444857, now seen corresponding path program 16 times [2023-11-24 21:30:04,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:04,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641406536] [2023-11-24 21:30:04,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:04,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:04,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:04,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641406536] [2023-11-24 21:30:04,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641406536] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:04,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177494429] [2023-11-24 21:30:04,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:30:04,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:04,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:04,912 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:04,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-24 21:30:05,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:30:05,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:30:05,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:30:05,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:05,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:05,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:30:05,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:05,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177494429] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:30:05,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:30:05,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-11-24 21:30:05,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86535673] [2023-11-24 21:30:05,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:30:05,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-24 21:30:05,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:05,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-24 21:30:05,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2023-11-24 21:30:05,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:30:05,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 222 transitions, 4278 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:05,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:30:05,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:30:05,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:30:05,861 INFO L124 PetriNetUnfolderBase]: 526/1136 cut-off events. [2023-11-24 21:30:05,861 INFO L125 PetriNetUnfolderBase]: For 25782/25782 co-relation queries the response was YES. [2023-11-24 21:30:05,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9380 conditions, 1136 events. 526/1136 cut-off events. For 25782/25782 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6950 event pairs, 28 based on Foata normal form. 2/1138 useless extension candidates. Maximal degree in co-relation 9181. Up to 291 conditions per place. [2023-11-24 21:30:05,878 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 119 selfloop transitions, 159 changer transitions 3/284 dead transitions. [2023-11-24 21:30:05,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 284 transitions, 5429 flow [2023-11-24 21:30:05,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-24 21:30:05,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-24 21:30:05,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 194 transitions. [2023-11-24 21:30:05,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5373961218836565 [2023-11-24 21:30:05,882 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 194 transitions. [2023-11-24 21:30:05,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 194 transitions. [2023-11-24 21:30:05,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:30:05,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 194 transitions. [2023-11-24 21:30:05,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 10.210526315789474) internal successors, (194), 19 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:05,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 19.0) internal successors, (380), 20 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:05,885 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 19.0) internal successors, (380), 20 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:05,885 INFO L175 Difference]: Start difference. First operand has 182 places, 222 transitions, 4278 flow. Second operand 19 states and 194 transitions. [2023-11-24 21:30:05,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 284 transitions, 5429 flow [2023-11-24 21:30:06,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 284 transitions, 5180 flow, removed 61 selfloop flow, removed 10 redundant places. [2023-11-24 21:30:06,101 INFO L231 Difference]: Finished difference. Result has 191 places, 231 transitions, 4754 flow [2023-11-24 21:30:06,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4051, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4754, PETRI_PLACES=191, PETRI_TRANSITIONS=231} [2023-11-24 21:30:06,102 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 170 predicate places. [2023-11-24 21:30:06,102 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 231 transitions, 4754 flow [2023-11-24 21:30:06,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:06,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:30:06,103 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:06,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-24 21:30:06,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:06,309 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:30:06,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:06,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1897874035, now seen corresponding path program 17 times [2023-11-24 21:30:06,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:06,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675626904] [2023-11-24 21:30:06,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:06,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:06,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:06,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675626904] [2023-11-24 21:30:06,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675626904] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:06,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162411761] [2023-11-24 21:30:06,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 21:30:06,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:06,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:06,401 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:06,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-24 21:30:06,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-24 21:30:06,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:30:06,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:30:06,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:06,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:30:06,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:06,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162411761] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:30:06,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:30:06,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-11-24 21:30:06,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760779101] [2023-11-24 21:30:06,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:30:06,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:30:06,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:06,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:30:06,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:30:06,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:30:06,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 231 transitions, 4754 flow. Second operand has 15 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:06,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:30:06,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:30:06,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:30:07,387 INFO L124 PetriNetUnfolderBase]: 570/1242 cut-off events. [2023-11-24 21:30:07,387 INFO L125 PetriNetUnfolderBase]: For 27693/27693 co-relation queries the response was YES. [2023-11-24 21:30:07,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10205 conditions, 1242 events. 570/1242 cut-off events. For 27693/27693 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 7700 event pairs, 30 based on Foata normal form. 8/1250 useless extension candidates. Maximal degree in co-relation 9517. Up to 412 conditions per place. [2023-11-24 21:30:07,407 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 137 selfloop transitions, 157 changer transitions 1/298 dead transitions. [2023-11-24 21:30:07,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 298 transitions, 6159 flow [2023-11-24 21:30:07,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-24 21:30:07,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-24 21:30:07,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 165 transitions. [2023-11-24 21:30:07,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5427631578947368 [2023-11-24 21:30:07,409 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 165 transitions. [2023-11-24 21:30:07,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 165 transitions. [2023-11-24 21:30:07,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:30:07,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 165 transitions. [2023-11-24 21:30:07,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 10.3125) internal successors, (165), 16 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:07,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 19.0) internal successors, (323), 17 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:07,413 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 19.0) internal successors, (323), 17 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:07,413 INFO L175 Difference]: Start difference. First operand has 191 places, 231 transitions, 4754 flow. Second operand 16 states and 165 transitions. [2023-11-24 21:30:07,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 298 transitions, 6159 flow [2023-11-24 21:30:07,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 298 transitions, 5876 flow, removed 105 selfloop flow, removed 7 redundant places. [2023-11-24 21:30:07,622 INFO L231 Difference]: Finished difference. Result has 207 places, 256 transitions, 5675 flow [2023-11-24 21:30:07,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4525, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5675, PETRI_PLACES=207, PETRI_TRANSITIONS=256} [2023-11-24 21:30:07,623 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 186 predicate places. [2023-11-24 21:30:07,623 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 256 transitions, 5675 flow [2023-11-24 21:30:07,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:07,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:30:07,624 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:07,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-24 21:30:07,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-24 21:30:07,824 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:30:07,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:07,825 INFO L85 PathProgramCache]: Analyzing trace with hash 490591320, now seen corresponding path program 18 times [2023-11-24 21:30:07,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:07,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364192579] [2023-11-24 21:30:07,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:07,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:07,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:30:07,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:07,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364192579] [2023-11-24 21:30:07,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364192579] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:07,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878734569] [2023-11-24 21:30:07,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-24 21:30:07,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:07,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:07,932 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:07,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-24 21:30:08,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-24 21:30:08,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:30:08,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:30:08,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:08,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:30:08,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:08,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878734569] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:30:08,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:30:08,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-11-24 21:30:08,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087423824] [2023-11-24 21:30:08,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:30:08,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-24 21:30:08,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:08,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-24 21:30:08,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2023-11-24 21:30:08,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:30:08,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 256 transitions, 5675 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:08,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:30:08,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:30:08,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:30:09,128 INFO L124 PetriNetUnfolderBase]: 644/1389 cut-off events. [2023-11-24 21:30:09,128 INFO L125 PetriNetUnfolderBase]: For 39977/39977 co-relation queries the response was YES. [2023-11-24 21:30:09,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12480 conditions, 1389 events. 644/1389 cut-off events. For 39977/39977 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8791 event pairs, 30 based on Foata normal form. 20/1409 useless extension candidates. Maximal degree in co-relation 11732. Up to 328 conditions per place. [2023-11-24 21:30:09,153 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 184 selfloop transitions, 164 changer transitions 15/366 dead transitions. [2023-11-24 21:30:09,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 366 transitions, 8162 flow [2023-11-24 21:30:09,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-24 21:30:09,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-24 21:30:09,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 221 transitions. [2023-11-24 21:30:09,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5538847117794486 [2023-11-24 21:30:09,157 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 221 transitions. [2023-11-24 21:30:09,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 221 transitions. [2023-11-24 21:30:09,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:30:09,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 221 transitions. [2023-11-24 21:30:09,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 10.523809523809524) internal successors, (221), 21 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:09,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:09,160 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:09,161 INFO L175 Difference]: Start difference. First operand has 207 places, 256 transitions, 5675 flow. Second operand 21 states and 221 transitions. [2023-11-24 21:30:09,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 366 transitions, 8162 flow [2023-11-24 21:30:09,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 366 transitions, 7852 flow, removed 88 selfloop flow, removed 9 redundant places. [2023-11-24 21:30:09,421 INFO L231 Difference]: Finished difference. Result has 227 places, 291 transitions, 7040 flow [2023-11-24 21:30:09,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=5415, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7040, PETRI_PLACES=227, PETRI_TRANSITIONS=291} [2023-11-24 21:30:09,422 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 206 predicate places. [2023-11-24 21:30:09,422 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 291 transitions, 7040 flow [2023-11-24 21:30:09,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:09,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:30:09,422 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:09,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-24 21:30:09,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-24 21:30:09,623 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:30:09,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:09,623 INFO L85 PathProgramCache]: Analyzing trace with hash 73020265, now seen corresponding path program 19 times [2023-11-24 21:30:09,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:09,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810015537] [2023-11-24 21:30:09,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:09,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:30:09,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:09,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810015537] [2023-11-24 21:30:09,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810015537] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:09,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547622038] [2023-11-24 21:30:09,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-24 21:30:09,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:09,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:09,722 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:09,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-24 21:30:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:09,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:30:09,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:09,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:09,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:30:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:10,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547622038] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:30:10,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:30:10,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-11-24 21:30:10,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290588356] [2023-11-24 21:30:10,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:30:10,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-24 21:30:10,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:10,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-24 21:30:10,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2023-11-24 21:30:10,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:30:10,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 291 transitions, 7040 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:10,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:30:10,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:30:10,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:30:10,780 INFO L124 PetriNetUnfolderBase]: 614/1289 cut-off events. [2023-11-24 21:30:10,780 INFO L125 PetriNetUnfolderBase]: For 40344/40344 co-relation queries the response was YES. [2023-11-24 21:30:10,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12360 conditions, 1289 events. 614/1289 cut-off events. For 40344/40344 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7793 event pairs, 38 based on Foata normal form. 20/1309 useless extension candidates. Maximal degree in co-relation 12117. Up to 452 conditions per place. [2023-11-24 21:30:10,801 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 177 selfloop transitions, 145 changer transitions 7/332 dead transitions. [2023-11-24 21:30:10,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 332 transitions, 8056 flow [2023-11-24 21:30:10,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:30:10,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-24 21:30:10,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 150 transitions. [2023-11-24 21:30:10,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5639097744360902 [2023-11-24 21:30:10,803 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 150 transitions. [2023-11-24 21:30:10,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 150 transitions. [2023-11-24 21:30:10,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:30:10,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 150 transitions. [2023-11-24 21:30:10,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 10.714285714285714) internal successors, (150), 14 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) [2023-11-24 21:30:10,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 19.0) internal successors, (285), 15 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:10,805 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 19.0) internal successors, (285), 15 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:10,806 INFO L175 Difference]: Start difference. First operand has 227 places, 291 transitions, 7040 flow. Second operand 14 states and 150 transitions. [2023-11-24 21:30:10,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 332 transitions, 8056 flow [2023-11-24 21:30:11,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 332 transitions, 7296 flow, removed 351 selfloop flow, removed 5 redundant places. [2023-11-24 21:30:11,144 INFO L231 Difference]: Finished difference. Result has 235 places, 287 transitions, 6468 flow [2023-11-24 21:30:11,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6071, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6468, PETRI_PLACES=235, PETRI_TRANSITIONS=287} [2023-11-24 21:30:11,145 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 214 predicate places. [2023-11-24 21:30:11,145 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 287 transitions, 6468 flow [2023-11-24 21:30:11,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:11,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:30:11,146 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:11,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-24 21:30:11,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-24 21:30:11,351 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:30:11,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:11,352 INFO L85 PathProgramCache]: Analyzing trace with hash 31709123, now seen corresponding path program 20 times [2023-11-24 21:30:11,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:11,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018953777] [2023-11-24 21:30:11,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:11,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:11,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:11,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018953777] [2023-11-24 21:30:11,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018953777] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:11,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889334259] [2023-11-24 21:30:11,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:30:11,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:11,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:11,444 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:11,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-24 21:30:11,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:30:11,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:30:11,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:30:11,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:11,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:11,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:30:11,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:11,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889334259] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:30:11,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:30:11,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-11-24 21:30:11,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425504188] [2023-11-24 21:30:11,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:30:11,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:30:11,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:11,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:30:11,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:30:11,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:30:11,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 287 transitions, 6468 flow. Second operand has 15 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:11,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:30:11,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:30:11,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:30:12,394 INFO L124 PetriNetUnfolderBase]: 601/1230 cut-off events. [2023-11-24 21:30:12,395 INFO L125 PetriNetUnfolderBase]: For 31410/31410 co-relation queries the response was YES. [2023-11-24 21:30:12,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11443 conditions, 1230 events. 601/1230 cut-off events. For 31410/31410 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 7160 event pairs, 32 based on Foata normal form. 16/1246 useless extension candidates. Maximal degree in co-relation 11119. Up to 454 conditions per place. [2023-11-24 21:30:12,414 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 177 selfloop transitions, 143 changer transitions 9/332 dead transitions. [2023-11-24 21:30:12,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 332 transitions, 7734 flow [2023-11-24 21:30:12,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-24 21:30:12,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-24 21:30:12,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 156 transitions. [2023-11-24 21:30:12,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5131578947368421 [2023-11-24 21:30:12,416 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 156 transitions. [2023-11-24 21:30:12,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 156 transitions. [2023-11-24 21:30:12,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:30:12,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 156 transitions. [2023-11-24 21:30:12,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 9.75) internal successors, (156), 16 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:12,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 19.0) internal successors, (323), 17 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:12,420 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 19.0) internal successors, (323), 17 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:12,421 INFO L175 Difference]: Start difference. First operand has 235 places, 287 transitions, 6468 flow. Second operand 16 states and 156 transitions. [2023-11-24 21:30:12,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 332 transitions, 7734 flow [2023-11-24 21:30:12,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 332 transitions, 7550 flow, removed 53 selfloop flow, removed 10 redundant places. [2023-11-24 21:30:12,680 INFO L231 Difference]: Finished difference. Result has 240 places, 287 transitions, 6613 flow [2023-11-24 21:30:12,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6185, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6613, PETRI_PLACES=240, PETRI_TRANSITIONS=287} [2023-11-24 21:30:12,681 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 219 predicate places. [2023-11-24 21:30:12,681 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 287 transitions, 6613 flow [2023-11-24 21:30:12,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:12,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:30:12,682 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:12,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-24 21:30:12,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-24 21:30:12,888 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:30:12,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:12,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1827169076, now seen corresponding path program 21 times [2023-11-24 21:30:12,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:12,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654830187] [2023-11-24 21:30:12,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:12,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:12,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:12,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:12,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654830187] [2023-11-24 21:30:12,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654830187] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:12,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680713978] [2023-11-24 21:30:12,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:30:12,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:12,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:12,985 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:13,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-24 21:30:13,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-24 21:30:13,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:30:13,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:30:13,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 21:30:13,149 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:30:13,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680713978] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:30:13,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:30:13,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2023-11-24 21:30:13,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182809274] [2023-11-24 21:30:13,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:30:13,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:30:13,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:13,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:30:13,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-24 21:30:13,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:30:13,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 287 transitions, 6613 flow. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:13,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:30:13,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:30:13,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:30:13,595 INFO L124 PetriNetUnfolderBase]: 581/1179 cut-off events. [2023-11-24 21:30:13,595 INFO L125 PetriNetUnfolderBase]: For 31663/31665 co-relation queries the response was YES. [2023-11-24 21:30:13,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11059 conditions, 1179 events. 581/1179 cut-off events. For 31663/31665 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6751 event pairs, 38 based on Foata normal form. 4/1183 useless extension candidates. Maximal degree in co-relation 10740. Up to 791 conditions per place. [2023-11-24 21:30:13,611 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 246 selfloop transitions, 23 changer transitions 29/301 dead transitions. [2023-11-24 21:30:13,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 301 transitions, 7354 flow [2023-11-24 21:30:13,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:30:13,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:30:13,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 62 transitions. [2023-11-24 21:30:13,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.543859649122807 [2023-11-24 21:30:13,613 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 62 transitions. [2023-11-24 21:30:13,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 62 transitions. [2023-11-24 21:30:13,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:30:13,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 62 transitions. [2023-11-24 21:30:13,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:13,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:13,614 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:13,614 INFO L175 Difference]: Start difference. First operand has 240 places, 287 transitions, 6613 flow. Second operand 6 states and 62 transitions. [2023-11-24 21:30:13,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 301 transitions, 7354 flow [2023-11-24 21:30:13,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 301 transitions, 6984 flow, removed 89 selfloop flow, removed 12 redundant places. [2023-11-24 21:30:13,843 INFO L231 Difference]: Finished difference. Result has 233 places, 263 transitions, 5904 flow [2023-11-24 21:30:13,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6233, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5904, PETRI_PLACES=233, PETRI_TRANSITIONS=263} [2023-11-24 21:30:13,844 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 212 predicate places. [2023-11-24 21:30:13,844 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 263 transitions, 5904 flow [2023-11-24 21:30:13,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:13,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:30:13,844 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:13,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-24 21:30:14,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-24 21:30:14,045 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:30:14,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:14,045 INFO L85 PathProgramCache]: Analyzing trace with hash 325349272, now seen corresponding path program 22 times [2023-11-24 21:30:14,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:14,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593157177] [2023-11-24 21:30:14,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:14,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:14,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:14,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:14,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593157177] [2023-11-24 21:30:14,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593157177] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:14,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809295926] [2023-11-24 21:30:14,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:30:14,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:14,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:14,136 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:14,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-24 21:30:14,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:30:14,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:30:14,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:30:14,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:14,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:14,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:30:14,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:14,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809295926] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:30:14,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:30:14,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-11-24 21:30:14,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392735410] [2023-11-24 21:30:14,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:30:14,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:30:14,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:14,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:30:14,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:30:14,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:30:14,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 263 transitions, 5904 flow. Second operand has 15 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:14,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:30:14,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:30:14,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:30:15,081 INFO L124 PetriNetUnfolderBase]: 629/1247 cut-off events. [2023-11-24 21:30:15,081 INFO L125 PetriNetUnfolderBase]: For 31483/31483 co-relation queries the response was YES. [2023-11-24 21:30:15,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11144 conditions, 1247 events. 629/1247 cut-off events. For 31483/31483 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6994 event pairs, 20 based on Foata normal form. 16/1263 useless extension candidates. Maximal degree in co-relation 11012. Up to 349 conditions per place. [2023-11-24 21:30:15,100 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 171 selfloop transitions, 181 changer transitions 0/355 dead transitions. [2023-11-24 21:30:15,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 355 transitions, 7683 flow [2023-11-24 21:30:15,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-24 21:30:15,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-24 21:30:15,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 173 transitions. [2023-11-24 21:30:15,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569078947368421 [2023-11-24 21:30:15,102 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 173 transitions. [2023-11-24 21:30:15,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 173 transitions. [2023-11-24 21:30:15,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:30:15,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 173 transitions. [2023-11-24 21:30:15,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 10.8125) internal successors, (173), 16 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:15,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 19.0) internal successors, (323), 17 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:15,104 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 19.0) internal successors, (323), 17 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:15,104 INFO L175 Difference]: Start difference. First operand has 233 places, 263 transitions, 5904 flow. Second operand 16 states and 173 transitions. [2023-11-24 21:30:15,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 355 transitions, 7683 flow [2023-11-24 21:30:15,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 355 transitions, 6949 flow, removed 76 selfloop flow, removed 22 redundant places. [2023-11-24 21:30:15,314 INFO L231 Difference]: Finished difference. Result has 217 places, 301 transitions, 6366 flow [2023-11-24 21:30:15,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=5213, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6366, PETRI_PLACES=217, PETRI_TRANSITIONS=301} [2023-11-24 21:30:15,315 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 196 predicate places. [2023-11-24 21:30:15,315 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 301 transitions, 6366 flow [2023-11-24 21:30:15,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:15,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:30:15,316 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:15,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-24 21:30:15,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-24 21:30:15,522 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:30:15,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:15,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1399867537, now seen corresponding path program 23 times [2023-11-24 21:30:15,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:15,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219467187] [2023-11-24 21:30:15,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:15,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:15,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:15,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:15,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:15,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219467187] [2023-11-24 21:30:15,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219467187] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:15,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722993075] [2023-11-24 21:30:15,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 21:30:15,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:15,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:15,606 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:15,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-24 21:30:15,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-24 21:30:15,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:30:15,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:30:15,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:15,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:15,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:30:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:15,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722993075] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:30:15,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:30:15,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-11-24 21:30:15,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184187209] [2023-11-24 21:30:15,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:30:15,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-24 21:30:15,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:15,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-24 21:30:15,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2023-11-24 21:30:15,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:30:15,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 301 transitions, 6366 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:15,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:30:15,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:30:15,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:30:16,548 INFO L124 PetriNetUnfolderBase]: 671/1310 cut-off events. [2023-11-24 21:30:16,548 INFO L125 PetriNetUnfolderBase]: For 24362/24362 co-relation queries the response was YES. [2023-11-24 21:30:16,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11580 conditions, 1310 events. 671/1310 cut-off events. For 24362/24362 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 7326 event pairs, 46 based on Foata normal form. 8/1318 useless extension candidates. Maximal degree in co-relation 10863. Up to 822 conditions per place. [2023-11-24 21:30:16,569 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 253 selfloop transitions, 94 changer transitions 9/359 dead transitions. [2023-11-24 21:30:16,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 359 transitions, 7838 flow [2023-11-24 21:30:16,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:30:16,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-24 21:30:16,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 127 transitions. [2023-11-24 21:30:16,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4774436090225564 [2023-11-24 21:30:16,573 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 127 transitions. [2023-11-24 21:30:16,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 127 transitions. [2023-11-24 21:30:16,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:30:16,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 127 transitions. [2023-11-24 21:30:16,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 9.071428571428571) internal successors, (127), 14 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:16,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 19.0) internal successors, (285), 15 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:16,581 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 19.0) internal successors, (285), 15 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:16,581 INFO L175 Difference]: Start difference. First operand has 217 places, 301 transitions, 6366 flow. Second operand 14 states and 127 transitions. [2023-11-24 21:30:16,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 359 transitions, 7838 flow [2023-11-24 21:30:16,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 359 transitions, 7656 flow, removed 53 selfloop flow, removed 6 redundant places. [2023-11-24 21:30:16,786 INFO L231 Difference]: Finished difference. Result has 226 places, 325 transitions, 6894 flow [2023-11-24 21:30:16,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6150, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6894, PETRI_PLACES=226, PETRI_TRANSITIONS=325} [2023-11-24 21:30:16,787 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 205 predicate places. [2023-11-24 21:30:16,787 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 325 transitions, 6894 flow [2023-11-24 21:30:16,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:16,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:30:16,787 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:16,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-24 21:30:16,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-24 21:30:16,993 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:30:16,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:16,993 INFO L85 PathProgramCache]: Analyzing trace with hash -982296482, now seen corresponding path program 24 times [2023-11-24 21:30:16,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:16,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659213903] [2023-11-24 21:30:16,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:16,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:17,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:17,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:17,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659213903] [2023-11-24 21:30:17,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659213903] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:17,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855315959] [2023-11-24 21:30:17,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-24 21:30:17,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:17,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:17,075 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:17,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-24 21:30:17,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-24 21:30:17,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:30:17,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:30:17,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:17,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:17,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:30:17,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:17,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855315959] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:30:17,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:30:17,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-11-24 21:30:17,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150961066] [2023-11-24 21:30:17,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:30:17,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-24 21:30:17,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:17,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-24 21:30:17,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2023-11-24 21:30:17,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:30:17,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 325 transitions, 6894 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:17,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:30:17,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:30:17,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:30:18,110 INFO L124 PetriNetUnfolderBase]: 728/1444 cut-off events. [2023-11-24 21:30:18,110 INFO L125 PetriNetUnfolderBase]: For 37645/37645 co-relation queries the response was YES. [2023-11-24 21:30:18,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13018 conditions, 1444 events. 728/1444 cut-off events. For 37645/37645 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 8415 event pairs, 24 based on Foata normal form. 12/1456 useless extension candidates. Maximal degree in co-relation 12515. Up to 318 conditions per place. [2023-11-24 21:30:18,125 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 186 selfloop transitions, 229 changer transitions 2/420 dead transitions. [2023-11-24 21:30:18,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 420 transitions, 8964 flow [2023-11-24 21:30:18,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-24 21:30:18,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-24 21:30:18,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 205 transitions. [2023-11-24 21:30:18,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5678670360110804 [2023-11-24 21:30:18,127 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 205 transitions. [2023-11-24 21:30:18,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 205 transitions. [2023-11-24 21:30:18,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:30:18,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 205 transitions. [2023-11-24 21:30:18,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 10.789473684210526) internal successors, (205), 19 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:18,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 19.0) internal successors, (380), 20 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:18,131 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 19.0) internal successors, (380), 20 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:18,131 INFO L175 Difference]: Start difference. First operand has 226 places, 325 transitions, 6894 flow. Second operand 19 states and 205 transitions. [2023-11-24 21:30:18,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 420 transitions, 8964 flow [2023-11-24 21:30:18,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 420 transitions, 8823 flow, removed 42 selfloop flow, removed 4 redundant places. [2023-11-24 21:30:18,322 INFO L231 Difference]: Finished difference. Result has 243 places, 350 transitions, 8153 flow [2023-11-24 21:30:18,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6777, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8153, PETRI_PLACES=243, PETRI_TRANSITIONS=350} [2023-11-24 21:30:18,324 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 222 predicate places. [2023-11-24 21:30:18,324 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 350 transitions, 8153 flow [2023-11-24 21:30:18,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:18,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:30:18,324 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:18,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-24 21:30:18,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-24 21:30:18,530 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:30:18,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:18,531 INFO L85 PathProgramCache]: Analyzing trace with hash -2111103210, now seen corresponding path program 25 times [2023-11-24 21:30:18,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:18,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121802968] [2023-11-24 21:30:18,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:18,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:18,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:18,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:18,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121802968] [2023-11-24 21:30:18,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121802968] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:18,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230076118] [2023-11-24 21:30:18,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-24 21:30:18,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:18,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:18,689 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:18,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-24 21:30:18,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:18,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-24 21:30:18,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:18,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:30:19,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:19,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230076118] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:30:19,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:30:19,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 5] total 19 [2023-11-24 21:30:19,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8095730] [2023-11-24 21:30:19,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:30:19,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-24 21:30:19,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:19,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-24 21:30:19,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2023-11-24 21:30:19,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:30:19,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 350 transitions, 8153 flow. Second operand has 20 states, 20 states have (on average 7.45) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:19,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:30:19,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:30:19,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:30:19,890 INFO L124 PetriNetUnfolderBase]: 975/1910 cut-off events. [2023-11-24 21:30:19,890 INFO L125 PetriNetUnfolderBase]: For 70092/70092 co-relation queries the response was YES. [2023-11-24 21:30:19,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18494 conditions, 1910 events. 975/1910 cut-off events. For 70092/70092 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 11828 event pairs, 93 based on Foata normal form. 65/1975 useless extension candidates. Maximal degree in co-relation 17969. Up to 1184 conditions per place. [2023-11-24 21:30:19,911 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 346 selfloop transitions, 127 changer transitions 9/485 dead transitions. [2023-11-24 21:30:19,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 485 transitions, 11567 flow [2023-11-24 21:30:19,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:30:19,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-24 21:30:19,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 153 transitions. [2023-11-24 21:30:19,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6194331983805668 [2023-11-24 21:30:19,913 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 153 transitions. [2023-11-24 21:30:19,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 153 transitions. [2023-11-24 21:30:19,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:30:19,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 153 transitions. [2023-11-24 21:30:19,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 11.76923076923077) internal successors, (153), 13 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:19,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 19.0) internal successors, (266), 14 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:19,914 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 19.0) internal successors, (266), 14 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:19,914 INFO L175 Difference]: Start difference. First operand has 243 places, 350 transitions, 8153 flow. Second operand 13 states and 153 transitions. [2023-11-24 21:30:19,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 485 transitions, 11567 flow [2023-11-24 21:30:20,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 485 transitions, 11193 flow, removed 95 selfloop flow, removed 7 redundant places. [2023-11-24 21:30:20,224 INFO L231 Difference]: Finished difference. Result has 256 places, 421 transitions, 9902 flow [2023-11-24 21:30:20,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=7864, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9902, PETRI_PLACES=256, PETRI_TRANSITIONS=421} [2023-11-24 21:30:20,225 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 235 predicate places. [2023-11-24 21:30:20,225 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 421 transitions, 9902 flow [2023-11-24 21:30:20,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.45) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:20,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:30:20,225 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:20,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-24 21:30:20,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:20,426 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:30:20,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:20,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1799459332, now seen corresponding path program 26 times [2023-11-24 21:30:20,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:20,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265178047] [2023-11-24 21:30:20,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:20,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:20,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:30:20,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:20,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265178047] [2023-11-24 21:30:20,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265178047] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:20,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192014383] [2023-11-24 21:30:20,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:30:20,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:20,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:20,546 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:20,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-24 21:30:20,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:30:20,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:30:20,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-24 21:30:20,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:20,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:30:20,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 21:30:20,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192014383] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:30:20,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:30:20,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 5] total 13 [2023-11-24 21:30:20,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66929966] [2023-11-24 21:30:20,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:30:20,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:30:20,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:20,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:30:20,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:30:20,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:30:20,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 421 transitions, 9902 flow. Second operand has 14 states, 14 states have (on average 7.571428571428571) internal successors, (106), 14 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:20,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:30:20,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:30:20,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:30:21,989 INFO L124 PetriNetUnfolderBase]: 1283/2585 cut-off events. [2023-11-24 21:30:21,989 INFO L125 PetriNetUnfolderBase]: For 95666/95666 co-relation queries the response was YES. [2023-11-24 21:30:22,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25971 conditions, 2585 events. 1283/2585 cut-off events. For 95666/95666 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 17596 event pairs, 180 based on Foata normal form. 15/2600 useless extension candidates. Maximal degree in co-relation 25232. Up to 1695 conditions per place. [2023-11-24 21:30:22,016 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 410 selfloop transitions, 174 changer transitions 15/602 dead transitions. [2023-11-24 21:30:22,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 602 transitions, 15054 flow [2023-11-24 21:30:22,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:30:22,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-24 21:30:22,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 167 transitions. [2023-11-24 21:30:22,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6278195488721805 [2023-11-24 21:30:22,017 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 167 transitions. [2023-11-24 21:30:22,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 167 transitions. [2023-11-24 21:30:22,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:30:22,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 167 transitions. [2023-11-24 21:30:22,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 11.928571428571429) internal successors, (167), 14 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:22,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 19.0) internal successors, (285), 15 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:22,019 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 19.0) internal successors, (285), 15 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:22,019 INFO L175 Difference]: Start difference. First operand has 256 places, 421 transitions, 9902 flow. Second operand 14 states and 167 transitions. [2023-11-24 21:30:22,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 602 transitions, 15054 flow [2023-11-24 21:30:22,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 602 transitions, 14730 flow, removed 140 selfloop flow, removed 3 redundant places. [2023-11-24 21:30:22,525 INFO L231 Difference]: Finished difference. Result has 275 places, 529 transitions, 12946 flow [2023-11-24 21:30:22,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=9578, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=12946, PETRI_PLACES=275, PETRI_TRANSITIONS=529} [2023-11-24 21:30:22,526 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 254 predicate places. [2023-11-24 21:30:22,526 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 529 transitions, 12946 flow [2023-11-24 21:30:22,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.571428571428571) internal successors, (106), 14 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:22,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:30:22,527 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:22,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-24 21:30:22,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-24 21:30:22,732 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:30:22,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:22,733 INFO L85 PathProgramCache]: Analyzing trace with hash -446481046, now seen corresponding path program 27 times [2023-11-24 21:30:22,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:22,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407745575] [2023-11-24 21:30:22,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:22,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:22,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:22,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407745575] [2023-11-24 21:30:22,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407745575] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:22,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808386031] [2023-11-24 21:30:22,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:30:22,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:22,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:22,869 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:22,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-24 21:30:22,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-24 21:30:22,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:30:22,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:30:22,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:23,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 21:30:23,028 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:30:23,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808386031] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:30:23,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:30:23,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 13 [2023-11-24 21:30:23,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171896089] [2023-11-24 21:30:23,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:30:23,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:30:23,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:23,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:30:23,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:30:23,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:30:23,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 529 transitions, 12946 flow. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:23,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:30:23,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:30:23,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:30:24,310 INFO L124 PetriNetUnfolderBase]: 1398/2752 cut-off events. [2023-11-24 21:30:24,310 INFO L125 PetriNetUnfolderBase]: For 126862/126864 co-relation queries the response was YES. [2023-11-24 21:30:24,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29279 conditions, 2752 events. 1398/2752 cut-off events. For 126862/126864 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 18962 event pairs, 176 based on Foata normal form. 45/2797 useless extension candidates. Maximal degree in co-relation 28604. Up to 1046 conditions per place. [2023-11-24 21:30:24,338 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 62 selfloop transitions, 7 changer transitions 530/602 dead transitions. [2023-11-24 21:30:24,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 602 transitions, 15762 flow [2023-11-24 21:30:24,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:30:24,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:30:24,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 66 transitions. [2023-11-24 21:30:24,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5789473684210527 [2023-11-24 21:30:24,340 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 66 transitions. [2023-11-24 21:30:24,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 66 transitions. [2023-11-24 21:30:24,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:30:24,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 66 transitions. [2023-11-24 21:30:24,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:24,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:24,342 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:24,342 INFO L175 Difference]: Start difference. First operand has 275 places, 529 transitions, 12946 flow. Second operand 6 states and 66 transitions. [2023-11-24 21:30:24,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 602 transitions, 15762 flow [2023-11-24 21:30:25,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 602 transitions, 14752 flow, removed 497 selfloop flow, removed 2 redundant places. [2023-11-24 21:30:25,072 INFO L231 Difference]: Finished difference. Result has 278 places, 63 transitions, 1309 flow [2023-11-24 21:30:25,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=11988, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1309, PETRI_PLACES=278, PETRI_TRANSITIONS=63} [2023-11-24 21:30:25,073 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 257 predicate places. [2023-11-24 21:30:25,074 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 63 transitions, 1309 flow [2023-11-24 21:30:25,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:25,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:30:25,074 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:25,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-24 21:30:25,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-24 21:30:25,275 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:30:25,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:25,275 INFO L85 PathProgramCache]: Analyzing trace with hash -2084499460, now seen corresponding path program 28 times [2023-11-24 21:30:25,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:25,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255835081] [2023-11-24 21:30:25,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:25,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:25,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:25,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:25,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255835081] [2023-11-24 21:30:25,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255835081] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:25,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521499996] [2023-11-24 21:30:25,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:30:25,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:25,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:25,448 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:25,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-24 21:30:25,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:30:25,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:30:25,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-24 21:30:25,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:25,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:25,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:30:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:30:25,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521499996] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:30:25,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:30:25,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 5] total 19 [2023-11-24 21:30:25,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485195312] [2023-11-24 21:30:25,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:30:25,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-24 21:30:25,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:25,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-24 21:30:25,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2023-11-24 21:30:25,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:30:25,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 63 transitions, 1309 flow. Second operand has 20 states, 20 states have (on average 7.35) internal successors, (147), 20 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:25,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:30:25,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:30:25,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:30:26,083 INFO L124 PetriNetUnfolderBase]: 172/404 cut-off events. [2023-11-24 21:30:26,083 INFO L125 PetriNetUnfolderBase]: For 25454/25454 co-relation queries the response was YES. [2023-11-24 21:30:26,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4240 conditions, 404 events. 172/404 cut-off events. For 25454/25454 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 1886 event pairs, 44 based on Foata normal form. 1/405 useless extension candidates. Maximal degree in co-relation 4138. Up to 340 conditions per place. [2023-11-24 21:30:26,087 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 65 selfloop transitions, 14 changer transitions 7/89 dead transitions. [2023-11-24 21:30:26,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 89 transitions, 1800 flow [2023-11-24 21:30:26,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:30:26,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-24 21:30:26,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 113 transitions. [2023-11-24 21:30:26,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4574898785425101 [2023-11-24 21:30:26,088 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 113 transitions. [2023-11-24 21:30:26,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 113 transitions. [2023-11-24 21:30:26,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:30:26,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 113 transitions. [2023-11-24 21:30:26,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 8.692307692307692) internal successors, (113), 13 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) [2023-11-24 21:30:26,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 19.0) internal successors, (266), 14 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:26,090 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 19.0) internal successors, (266), 14 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:26,090 INFO L175 Difference]: Start difference. First operand has 278 places, 63 transitions, 1309 flow. Second operand 13 states and 113 transitions. [2023-11-24 21:30:26,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 89 transitions, 1800 flow [2023-11-24 21:30:26,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 89 transitions, 1067 flow, removed 126 selfloop flow, removed 107 redundant places. [2023-11-24 21:30:26,140 INFO L231 Difference]: Finished difference. Result has 129 places, 69 transitions, 825 flow [2023-11-24 21:30:26,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=711, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=825, PETRI_PLACES=129, PETRI_TRANSITIONS=69} [2023-11-24 21:30:26,141 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 108 predicate places. [2023-11-24 21:30:26,141 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 69 transitions, 825 flow [2023-11-24 21:30:26,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.35) internal successors, (147), 20 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:26,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:30:26,141 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:26,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-24 21:30:26,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:26,342 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:30:26,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:26,342 INFO L85 PathProgramCache]: Analyzing trace with hash -145117654, now seen corresponding path program 29 times [2023-11-24 21:30:26,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:26,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344376258] [2023-11-24 21:30:26,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:26,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:26,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:26,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344376258] [2023-11-24 21:30:26,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344376258] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:26,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465265415] [2023-11-24 21:30:26,448 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 21:30:26,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:26,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:26,452 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:26,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-24 21:30:26,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-24 21:30:26,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:30:26,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:30:26,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:26,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:30:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:26,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465265415] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:30:26,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:30:26,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-11-24 21:30:26,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261287006] [2023-11-24 21:30:26,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:30:26,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-24 21:30:26,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:26,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-24 21:30:26,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2023-11-24 21:30:26,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:30:26,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 69 transitions, 825 flow. Second operand has 18 states, 18 states have (on average 7.0) internal successors, (126), 18 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:26,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:30:26,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:30:26,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:30:27,083 INFO L124 PetriNetUnfolderBase]: 158/405 cut-off events. [2023-11-24 21:30:27,083 INFO L125 PetriNetUnfolderBase]: For 6547/6547 co-relation queries the response was YES. [2023-11-24 21:30:27,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2673 conditions, 405 events. 158/405 cut-off events. For 6547/6547 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2008 event pairs, 22 based on Foata normal form. 20/425 useless extension candidates. Maximal degree in co-relation 2618. Up to 150 conditions per place. [2023-11-24 21:30:27,085 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 60 selfloop transitions, 22 changer transitions 30/115 dead transitions. [2023-11-24 21:30:27,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 115 transitions, 1385 flow [2023-11-24 21:30:27,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:30:27,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-24 21:30:27,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 137 transitions. [2023-11-24 21:30:27,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5546558704453441 [2023-11-24 21:30:27,087 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 137 transitions. [2023-11-24 21:30:27,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 137 transitions. [2023-11-24 21:30:27,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:30:27,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 137 transitions. [2023-11-24 21:30:27,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 10.538461538461538) internal successors, (137), 13 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:27,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 19.0) internal successors, (266), 14 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:27,088 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 19.0) internal successors, (266), 14 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:27,088 INFO L175 Difference]: Start difference. First operand has 129 places, 69 transitions, 825 flow. Second operand 13 states and 137 transitions. [2023-11-24 21:30:27,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 115 transitions, 1385 flow [2023-11-24 21:30:27,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 115 transitions, 1255 flow, removed 39 selfloop flow, removed 13 redundant places. [2023-11-24 21:30:27,103 INFO L231 Difference]: Finished difference. Result has 134 places, 63 transitions, 783 flow [2023-11-24 21:30:27,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=783, PETRI_PLACES=134, PETRI_TRANSITIONS=63} [2023-11-24 21:30:27,103 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 113 predicate places. [2023-11-24 21:30:27,103 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 63 transitions, 783 flow [2023-11-24 21:30:27,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.0) internal successors, (126), 18 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:27,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:30:27,104 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:27,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-24 21:30:27,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:27,306 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:30:27,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:27,306 INFO L85 PathProgramCache]: Analyzing trace with hash -784272504, now seen corresponding path program 30 times [2023-11-24 21:30:27,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:27,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139312186] [2023-11-24 21:30:27,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:27,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:27,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:27,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139312186] [2023-11-24 21:30:27,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139312186] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:27,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840939292] [2023-11-24 21:30:27,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-24 21:30:27,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:27,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:27,414 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:27,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-24 21:30:27,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-24 21:30:27,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:30:27,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:30:27,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-24 21:30:27,578 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:30:27,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840939292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:30:27,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:30:27,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2023-11-24 21:30:27,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305223133] [2023-11-24 21:30:27,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:30:27,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:30:27,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:27,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:30:27,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:30:27,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:30:27,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 63 transitions, 783 flow. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:27,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:30:27,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:30:27,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:30:27,686 INFO L124 PetriNetUnfolderBase]: 129/312 cut-off events. [2023-11-24 21:30:27,686 INFO L125 PetriNetUnfolderBase]: For 3917/3917 co-relation queries the response was YES. [2023-11-24 21:30:27,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2081 conditions, 312 events. 129/312 cut-off events. For 3917/3917 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1335 event pairs, 16 based on Foata normal form. 5/317 useless extension candidates. Maximal degree in co-relation 2026. Up to 88 conditions per place. [2023-11-24 21:30:27,688 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 41 selfloop transitions, 4 changer transitions 31/79 dead transitions. [2023-11-24 21:30:27,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 79 transitions, 1023 flow [2023-11-24 21:30:27,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:30:27,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:30:27,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 66 transitions. [2023-11-24 21:30:27,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5789473684210527 [2023-11-24 21:30:27,689 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 66 transitions. [2023-11-24 21:30:27,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 66 transitions. [2023-11-24 21:30:27,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:30:27,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 66 transitions. [2023-11-24 21:30:27,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:27,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:27,690 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:27,690 INFO L175 Difference]: Start difference. First operand has 134 places, 63 transitions, 783 flow. Second operand 6 states and 66 transitions. [2023-11-24 21:30:27,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 79 transitions, 1023 flow [2023-11-24 21:30:27,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 79 transitions, 951 flow, removed 21 selfloop flow, removed 6 redundant places. [2023-11-24 21:30:27,702 INFO L231 Difference]: Finished difference. Result has 131 places, 41 transitions, 403 flow [2023-11-24 21:30:27,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=711, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=403, PETRI_PLACES=131, PETRI_TRANSITIONS=41} [2023-11-24 21:30:27,703 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 110 predicate places. [2023-11-24 21:30:27,703 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 41 transitions, 403 flow [2023-11-24 21:30:27,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:27,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:30:27,703 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:27,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-24 21:30:27,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-24 21:30:27,904 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:30:27,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:27,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1224297617, now seen corresponding path program 31 times [2023-11-24 21:30:27,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:27,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378625048] [2023-11-24 21:30:27,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:27,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:27,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:27,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378625048] [2023-11-24 21:30:27,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378625048] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:27,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366289618] [2023-11-24 21:30:27,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-24 21:30:27,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:27,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:27,999 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:28,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-24 21:30:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:28,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:30:28,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:28,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:28,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:30:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:28,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366289618] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:30:28,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:30:28,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 20 [2023-11-24 21:30:28,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140985314] [2023-11-24 21:30:28,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:30:28,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-24 21:30:28,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:28,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-24 21:30:28,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2023-11-24 21:30:28,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:30:28,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 41 transitions, 403 flow. Second operand has 21 states, 21 states have (on average 7.0) internal successors, (147), 21 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:28,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:30:28,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:30:28,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:30:28,555 INFO L124 PetriNetUnfolderBase]: 60/153 cut-off events. [2023-11-24 21:30:28,555 INFO L125 PetriNetUnfolderBase]: For 1663/1663 co-relation queries the response was YES. [2023-11-24 21:30:28,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 911 conditions, 153 events. 60/153 cut-off events. For 1663/1663 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 431 event pairs, 0 based on Foata normal form. 2/155 useless extension candidates. Maximal degree in co-relation 855. Up to 43 conditions per place. [2023-11-24 21:30:28,557 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 48 selfloop transitions, 13 changer transitions 7/71 dead transitions. [2023-11-24 21:30:28,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 71 transitions, 650 flow [2023-11-24 21:30:28,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:30:28,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-24 21:30:28,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 124 transitions. [2023-11-24 21:30:28,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020242914979757 [2023-11-24 21:30:28,559 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 124 transitions. [2023-11-24 21:30:28,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 124 transitions. [2023-11-24 21:30:28,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:30:28,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 124 transitions. [2023-11-24 21:30:28,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 9.538461538461538) internal successors, (124), 13 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) [2023-11-24 21:30:28,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 19.0) internal successors, (266), 14 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:28,561 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 19.0) internal successors, (266), 14 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:28,561 INFO L175 Difference]: Start difference. First operand has 131 places, 41 transitions, 403 flow. Second operand 13 states and 124 transitions. [2023-11-24 21:30:28,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 71 transitions, 650 flow [2023-11-24 21:30:28,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 71 transitions, 562 flow, removed 13 selfloop flow, removed 24 redundant places. [2023-11-24 21:30:28,570 INFO L231 Difference]: Finished difference. Result has 104 places, 37 transitions, 321 flow [2023-11-24 21:30:28,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=321, PETRI_PLACES=104, PETRI_TRANSITIONS=37} [2023-11-24 21:30:28,571 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 83 predicate places. [2023-11-24 21:30:28,571 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 37 transitions, 321 flow [2023-11-24 21:30:28,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.0) internal successors, (147), 21 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:28,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:30:28,572 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:28,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-24 21:30:28,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-24 21:30:28,778 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:30:28,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:28,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1208213545, now seen corresponding path program 32 times [2023-11-24 21:30:28,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:28,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599309064] [2023-11-24 21:30:28,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:28,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:28,944 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:28,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:28,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599309064] [2023-11-24 21:30:28,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599309064] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:28,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573305445] [2023-11-24 21:30:28,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:30:28,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:28,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:28,946 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:28,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-24 21:30:29,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:30:29,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:30:29,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-24 21:30:29,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:29,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:30:29,383 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:29,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573305445] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:30:29,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:30:29,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 24 [2023-11-24 21:30:29,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536710204] [2023-11-24 21:30:29,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:30:29,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-24 21:30:29,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:29,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-24 21:30:29,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2023-11-24 21:30:29,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:30:29,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 37 transitions, 321 flow. Second operand has 25 states, 25 states have (on average 7.2) internal successors, (180), 25 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:29,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:30:29,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:30:29,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:30:29,782 INFO L124 PetriNetUnfolderBase]: 85/201 cut-off events. [2023-11-24 21:30:29,782 INFO L125 PetriNetUnfolderBase]: For 1501/1501 co-relation queries the response was YES. [2023-11-24 21:30:29,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1139 conditions, 201 events. 85/201 cut-off events. For 1501/1501 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 629 event pairs, 0 based on Foata normal form. 1/202 useless extension candidates. Maximal degree in co-relation 1098. Up to 68 conditions per place. [2023-11-24 21:30:29,784 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 69 selfloop transitions, 17 changer transitions 3/92 dead transitions. [2023-11-24 21:30:29,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 92 transitions, 755 flow [2023-11-24 21:30:29,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-24 21:30:29,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-24 21:30:29,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 160 transitions. [2023-11-24 21:30:29,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5263157894736842 [2023-11-24 21:30:29,786 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 160 transitions. [2023-11-24 21:30:29,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 160 transitions. [2023-11-24 21:30:29,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:30:29,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 160 transitions. [2023-11-24 21:30:29,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 10.0) internal successors, (160), 16 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:29,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 19.0) internal successors, (323), 17 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:29,788 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 19.0) internal successors, (323), 17 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:29,788 INFO L175 Difference]: Start difference. First operand has 104 places, 37 transitions, 321 flow. Second operand 16 states and 160 transitions. [2023-11-24 21:30:29,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 92 transitions, 755 flow [2023-11-24 21:30:29,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 92 transitions, 692 flow, removed 12 selfloop flow, removed 12 redundant places. [2023-11-24 21:30:29,795 INFO L231 Difference]: Finished difference. Result has 106 places, 44 transitions, 397 flow [2023-11-24 21:30:29,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=397, PETRI_PLACES=106, PETRI_TRANSITIONS=44} [2023-11-24 21:30:29,796 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 85 predicate places. [2023-11-24 21:30:29,796 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 44 transitions, 397 flow [2023-11-24 21:30:29,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.2) internal successors, (180), 25 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:29,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:30:29,797 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:29,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-24 21:30:30,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:30,003 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:30:30,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:30,003 INFO L85 PathProgramCache]: Analyzing trace with hash -719135895, now seen corresponding path program 33 times [2023-11-24 21:30:30,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:30,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265894468] [2023-11-24 21:30:30,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:30,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:30,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:30,176 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:30,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:30,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265894468] [2023-11-24 21:30:30,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265894468] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:30,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189391292] [2023-11-24 21:30:30,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:30:30,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:30,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:30,178 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:30,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-24 21:30:30,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-24 21:30:30,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:30:30,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:30:30,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:30,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 21:30:30,350 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:30:30,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189391292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:30:30,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:30:30,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2023-11-24 21:30:30,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680649806] [2023-11-24 21:30:30,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:30:30,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:30:30,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:30,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:30:30,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2023-11-24 21:30:30,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:30:30,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 44 transitions, 397 flow. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:30,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:30:30,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:30:30,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:30:30,433 INFO L124 PetriNetUnfolderBase]: 81/196 cut-off events. [2023-11-24 21:30:30,433 INFO L125 PetriNetUnfolderBase]: For 1138/1138 co-relation queries the response was YES. [2023-11-24 21:30:30,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1070 conditions, 196 events. 81/196 cut-off events. For 1138/1138 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 625 event pairs, 21 based on Foata normal form. 1/197 useless extension candidates. Maximal degree in co-relation 1028. Up to 102 conditions per place. [2023-11-24 21:30:30,435 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 29 selfloop transitions, 2 changer transitions 21/55 dead transitions. [2023-11-24 21:30:30,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 55 transitions, 541 flow [2023-11-24 21:30:30,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:30:30,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:30:30,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 61 transitions. [2023-11-24 21:30:30,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5350877192982456 [2023-11-24 21:30:30,436 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 61 transitions. [2023-11-24 21:30:30,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 61 transitions. [2023-11-24 21:30:30,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:30:30,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 61 transitions. [2023-11-24 21:30:30,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:30,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:30,438 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:30,438 INFO L175 Difference]: Start difference. First operand has 106 places, 44 transitions, 397 flow. Second operand 6 states and 61 transitions. [2023-11-24 21:30:30,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 55 transitions, 541 flow [2023-11-24 21:30:30,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 55 transitions, 485 flow, removed 16 selfloop flow, removed 8 redundant places. [2023-11-24 21:30:30,445 INFO L231 Difference]: Finished difference. Result has 103 places, 31 transitions, 226 flow [2023-11-24 21:30:30,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=226, PETRI_PLACES=103, PETRI_TRANSITIONS=31} [2023-11-24 21:30:30,445 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 82 predicate places. [2023-11-24 21:30:30,446 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 31 transitions, 226 flow [2023-11-24 21:30:30,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:30,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:30:30,446 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:30,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-24 21:30:30,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-24 21:30:30,652 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:30:30,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:30,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1309341031, now seen corresponding path program 34 times [2023-11-24 21:30:30,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:30,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777969471] [2023-11-24 21:30:30,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:30,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:30,779 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:30,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:30,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777969471] [2023-11-24 21:30:30,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777969471] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:30,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049033254] [2023-11-24 21:30:30,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:30:30,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:30,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:30,781 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:30,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-24 21:30:30,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:30:30,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:30:30,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-24 21:30:30,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:30,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:30:31,117 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:31,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049033254] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:30:31,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:30:31,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-11-24 21:30:31,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334034711] [2023-11-24 21:30:31,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:30:31,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-24 21:30:31,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:31,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-24 21:30:31,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=311, Unknown=0, NotChecked=0, Total=462 [2023-11-24 21:30:31,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:30:31,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 31 transitions, 226 flow. Second operand has 22 states, 22 states have (on average 6.818181818181818) internal successors, (150), 22 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) [2023-11-24 21:30:31,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:30:31,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:30:31,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:30:31,305 INFO L124 PetriNetUnfolderBase]: 62/149 cut-off events. [2023-11-24 21:30:31,306 INFO L125 PetriNetUnfolderBase]: For 823/823 co-relation queries the response was YES. [2023-11-24 21:30:31,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 749 conditions, 149 events. 62/149 cut-off events. For 823/823 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 389 event pairs, 10 based on Foata normal form. 4/153 useless extension candidates. Maximal degree in co-relation 707. Up to 60 conditions per place. [2023-11-24 21:30:31,307 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 34 selfloop transitions, 7 changer transitions 24/68 dead transitions. [2023-11-24 21:30:31,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 68 transitions, 472 flow [2023-11-24 21:30:31,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:30:31,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-24 21:30:31,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 126 transitions. [2023-11-24 21:30:31,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5101214574898786 [2023-11-24 21:30:31,308 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 126 transitions. [2023-11-24 21:30:31,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 126 transitions. [2023-11-24 21:30:31,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:30:31,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 126 transitions. [2023-11-24 21:30:31,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 9.692307692307692) internal successors, (126), 13 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:31,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 19.0) internal successors, (266), 14 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:31,310 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 19.0) internal successors, (266), 14 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:31,310 INFO L175 Difference]: Start difference. First operand has 103 places, 31 transitions, 226 flow. Second operand 13 states and 126 transitions. [2023-11-24 21:30:31,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 68 transitions, 472 flow [2023-11-24 21:30:31,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 68 transitions, 424 flow, removed 5 selfloop flow, removed 13 redundant places. [2023-11-24 21:30:31,314 INFO L231 Difference]: Finished difference. Result has 88 places, 26 transitions, 167 flow [2023-11-24 21:30:31,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=167, PETRI_PLACES=88, PETRI_TRANSITIONS=26} [2023-11-24 21:30:31,315 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 67 predicate places. [2023-11-24 21:30:31,315 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 26 transitions, 167 flow [2023-11-24 21:30:31,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.818181818181818) internal successors, (150), 22 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) [2023-11-24 21:30:31,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:30:31,316 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:31,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-24 21:30:31,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-24 21:30:31,521 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:30:31,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:31,522 INFO L85 PathProgramCache]: Analyzing trace with hash 605978492, now seen corresponding path program 35 times [2023-11-24 21:30:31,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:31,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930084826] [2023-11-24 21:30:31,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:31,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:31,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:31,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930084826] [2023-11-24 21:30:31,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930084826] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:31,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511822674] [2023-11-24 21:30:31,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 21:30:31,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:31,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:31,724 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:31,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-24 21:30:31,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-24 21:30:31,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:30:31,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-24 21:30:31,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:32,098 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:32,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:30:32,219 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:32,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511822674] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:30:32,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:30:32,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 7] total 29 [2023-11-24 21:30:32,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573347747] [2023-11-24 21:30:32,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:30:32,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-24 21:30:32,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:32,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-24 21:30:32,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2023-11-24 21:30:32,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:30:32,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 26 transitions, 167 flow. Second operand has 30 states, 30 states have (on average 7.033333333333333) internal successors, (211), 30 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:32,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:30:32,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:30:32,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:30:32,673 INFO L124 PetriNetUnfolderBase]: 79/178 cut-off events. [2023-11-24 21:30:32,673 INFO L125 PetriNetUnfolderBase]: For 517/517 co-relation queries the response was YES. [2023-11-24 21:30:32,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 844 conditions, 178 events. 79/178 cut-off events. For 517/517 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 467 event pairs, 0 based on Foata normal form. 1/179 useless extension candidates. Maximal degree in co-relation 811. Up to 33 conditions per place. [2023-11-24 21:30:32,674 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 66 selfloop transitions, 19 changer transitions 3/91 dead transitions. [2023-11-24 21:30:32,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 91 transitions, 586 flow [2023-11-24 21:30:32,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-24 21:30:32,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-24 21:30:32,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 184 transitions. [2023-11-24 21:30:32,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096952908587258 [2023-11-24 21:30:32,676 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 184 transitions. [2023-11-24 21:30:32,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 184 transitions. [2023-11-24 21:30:32,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:30:32,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 184 transitions. [2023-11-24 21:30:32,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 9.68421052631579) internal successors, (184), 19 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:32,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 19.0) internal successors, (380), 20 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:32,678 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 19.0) internal successors, (380), 20 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:32,678 INFO L175 Difference]: Start difference. First operand has 88 places, 26 transitions, 167 flow. Second operand 19 states and 184 transitions. [2023-11-24 21:30:32,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 91 transitions, 586 flow [2023-11-24 21:30:32,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 91 transitions, 562 flow, removed 3 selfloop flow, removed 8 redundant places. [2023-11-24 21:30:32,682 INFO L231 Difference]: Finished difference. Result has 92 places, 34 transitions, 252 flow [2023-11-24 21:30:32,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=252, PETRI_PLACES=92, PETRI_TRANSITIONS=34} [2023-11-24 21:30:32,682 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 71 predicate places. [2023-11-24 21:30:32,683 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 34 transitions, 252 flow [2023-11-24 21:30:32,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 7.033333333333333) internal successors, (211), 30 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:32,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:30:32,683 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:32,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-24 21:30:32,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-24 21:30:32,889 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:30:32,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:32,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1031512196, now seen corresponding path program 36 times [2023-11-24 21:30:32,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:32,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311415640] [2023-11-24 21:30:32,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:32,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:33,043 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:30:33,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:33,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311415640] [2023-11-24 21:30:33,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311415640] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:33,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772127879] [2023-11-24 21:30:33,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-24 21:30:33,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:33,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:33,045 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:33,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-24 21:30:33,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-24 21:30:33,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:30:33,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:30:33,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:33,230 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-24 21:30:33,230 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:30:33,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772127879] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:30:33,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:30:33,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 18 [2023-11-24 21:30:33,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560074348] [2023-11-24 21:30:33,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:30:33,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:30:33,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:33,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:30:33,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2023-11-24 21:30:33,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-24 21:30:33,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 34 transitions, 252 flow. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:33,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:30:33,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-24 21:30:33,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:30:33,302 INFO L124 PetriNetUnfolderBase]: 75/172 cut-off events. [2023-11-24 21:30:33,302 INFO L125 PetriNetUnfolderBase]: For 465/465 co-relation queries the response was YES. [2023-11-24 21:30:33,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 172 events. 75/172 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 460 event pairs, 0 based on Foata normal form. 1/173 useless extension candidates. Maximal degree in co-relation 822. Up to 85 conditions per place. [2023-11-24 21:30:33,303 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 0 selfloop transitions, 0 changer transitions 44/44 dead transitions. [2023-11-24 21:30:33,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 44 transitions, 357 flow [2023-11-24 21:30:33,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:30:33,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:30:33,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 57 transitions. [2023-11-24 21:30:33,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-24 21:30:33,305 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 57 transitions. [2023-11-24 21:30:33,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 57 transitions. [2023-11-24 21:30:33,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:30:33,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 57 transitions. [2023-11-24 21:30:33,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 9.5) internal successors, (57), 6 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) [2023-11-24 21:30:33,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:33,306 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:33,306 INFO L175 Difference]: Start difference. First operand has 92 places, 34 transitions, 252 flow. Second operand 6 states and 57 transitions. [2023-11-24 21:30:33,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 44 transitions, 357 flow [2023-11-24 21:30:33,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 44 transitions, 306 flow, removed 10 selfloop flow, removed 11 redundant places. [2023-11-24 21:30:33,310 INFO L231 Difference]: Finished difference. Result has 83 places, 0 transitions, 0 flow [2023-11-24 21:30:33,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=83, PETRI_TRANSITIONS=0} [2023-11-24 21:30:33,310 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 62 predicate places. [2023-11-24 21:30:33,310 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 0 transitions, 0 flow [2023-11-24 21:30:33,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:30:33,313 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-24 21:30:33,314 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-24 21:30:33,314 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-24 21:30:33,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-24 21:30:33,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:33,520 INFO L445 BasicCegarLoop]: Path program histogram: [36, 2, 2, 1] [2023-11-24 21:30:33,525 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-24 21:30:33,525 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-24 21:30:33,530 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 09:30:33 BasicIcfg [2023-11-24 21:30:33,530 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-24 21:30:33,530 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-24 21:30:33,530 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-24 21:30:33,531 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-24 21:30:33,531 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:29:46" (3/4) ... [2023-11-24 21:30:33,533 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-24 21:30:33,536 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-11-24 21:30:33,536 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-11-24 21:30:33,541 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 50 nodes and edges [2023-11-24 21:30:33,542 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2023-11-24 21:30:33,542 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2023-11-24 21:30:33,542 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-24 21:30:33,640 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/witness.graphml [2023-11-24 21:30:33,641 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/witness.yml [2023-11-24 21:30:33,641 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-24 21:30:33,641 INFO L158 Benchmark]: Toolchain (without parser) took 47863.70ms. Allocated memory was 136.3MB in the beginning and 625.0MB in the end (delta: 488.6MB). Free memory was 91.1MB in the beginning and 472.8MB in the end (delta: -381.7MB). Peak memory consumption was 433.9MB. Max. memory is 16.1GB. [2023-11-24 21:30:33,642 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 136.3MB. Free memory is still 109.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 21:30:33,642 INFO L158 Benchmark]: CACSL2BoogieTranslator took 293.48ms. Allocated memory is still 136.3MB. Free memory was 90.7MB in the beginning and 79.8MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-24 21:30:33,642 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.83ms. Allocated memory is still 136.3MB. Free memory was 79.8MB in the beginning and 78.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 21:30:33,643 INFO L158 Benchmark]: Boogie Preprocessor took 55.70ms. Allocated memory is still 136.3MB. Free memory was 78.1MB in the beginning and 76.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 21:30:33,643 INFO L158 Benchmark]: RCFGBuilder took 715.38ms. Allocated memory was 136.3MB in the beginning and 182.5MB in the end (delta: 46.1MB). Free memory was 76.1MB in the beginning and 147.0MB in the end (delta: -71.0MB). Peak memory consumption was 20.9MB. Max. memory is 16.1GB. [2023-11-24 21:30:33,644 INFO L158 Benchmark]: TraceAbstraction took 46625.71ms. Allocated memory was 182.5MB in the beginning and 625.0MB in the end (delta: 442.5MB). Free memory was 146.0MB in the beginning and 149.2MB in the end (delta: -3.2MB). Peak memory consumption was 438.2MB. Max. memory is 16.1GB. [2023-11-24 21:30:33,644 INFO L158 Benchmark]: Witness Printer took 110.51ms. Allocated memory is still 625.0MB. Free memory was 149.2MB in the beginning and 472.8MB in the end (delta: -323.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 21:30:33,646 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 136.3MB. Free memory is still 109.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 293.48ms. Allocated memory is still 136.3MB. Free memory was 90.7MB in the beginning and 79.8MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 54.83ms. Allocated memory is still 136.3MB. Free memory was 79.8MB in the beginning and 78.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.70ms. Allocated memory is still 136.3MB. Free memory was 78.1MB in the beginning and 76.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 715.38ms. Allocated memory was 136.3MB in the beginning and 182.5MB in the end (delta: 46.1MB). Free memory was 76.1MB in the beginning and 147.0MB in the end (delta: -71.0MB). Peak memory consumption was 20.9MB. Max. memory is 16.1GB. * TraceAbstraction took 46625.71ms. Allocated memory was 182.5MB in the beginning and 625.0MB in the end (delta: 442.5MB). Free memory was 146.0MB in the beginning and 149.2MB in the end (delta: -3.2MB). Peak memory consumption was 438.2MB. Max. memory is 16.1GB. * Witness Printer took 110.51ms. Allocated memory is still 625.0MB. Free memory was 149.2MB in the beginning and 472.8MB in the end (delta: -323.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 70]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 26 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 46.5s, OverallIterations: 41, TraceHistogramMax: 6, PathProgramHistogramMax: 36, EmptinessCheckTime: 0.0s, AutomataDifference: 23.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2249 SdHoareTripleChecker+Valid, 5.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2249 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 4.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 428 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7167 IncrementalHoareTripleChecker+Invalid, 7595 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 428 mSolverCounterUnsat, 0 mSDtfsCounter, 7167 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1656 GetRequests, 1001 SyntacticMatches, 25 SemanticMatches, 630 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3390 ImplicationChecksByTransitivity, 5.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12946occurred in iteration=31, InterpolantAutomatonStates: 443, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 10.7s InterpolantComputationTime, 1469 NumberOfCodeBlocks, 1451 NumberOfCodeBlocksAsserted, 123 NumberOfCheckSat, 1939 ConstructedInterpolants, 0 QuantifiedInterpolants, 8373 SizeOfPredicates, 11 NumberOfNonLiveVariables, 4652 ConjunctsInSsa, 301 ConjunctsInUnsatCore, 109 InterpolantComputations, 11 PerfectInterpolantSequences, 496/1044 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-24 21:30:33,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dc7069-25d8-4e49-ac6d-e0fd62fa7738/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE