./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya --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 8c7125507f231f46c946ebcd57e8b56859ee58b969eed99ccdbcf88141d9e219 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:05:42,464 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:05:42,525 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:05:42,530 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:05:42,530 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:05:42,553 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:05:42,553 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:05:42,554 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:05:42,554 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:05:42,555 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:05:42,555 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:05:42,556 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:05:42,557 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:05:42,557 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:05:42,558 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:05:42,558 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:05:42,559 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:05:42,560 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:05:42,560 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:05:42,561 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:05:42,561 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:05:42,562 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:05:42,562 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:05:42,563 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:05:42,563 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:05:42,564 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:05:42,564 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:05:42,565 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:05:42,565 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:05:42,566 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:05:42,566 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:05:42,567 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:05:42,567 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:05:42,567 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:05:42,568 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:05:42,568 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:05:42,568 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:05:42,568 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:05:42,568 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:05:42,569 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:05:42,569 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:05:42,569 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:05:42,569 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_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c7125507f231f46c946ebcd57e8b56859ee58b969eed99ccdbcf88141d9e219 [2023-11-29 00:05:42,768 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:05:42,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:05:42,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:05:42,807 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:05:42,807 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:05:42,808 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/unroll-2.wvr.c [2023-11-29 00:05:45,455 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:05:45,670 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:05:45,671 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/sv-benchmarks/c/weaver/unroll-2.wvr.c [2023-11-29 00:05:45,678 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/data/8d3874520/ac2001479bd549c98b6846ed9c580040/FLAGa35d14adc [2023-11-29 00:05:45,691 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/data/8d3874520/ac2001479bd549c98b6846ed9c580040 [2023-11-29 00:05:45,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:05:45,694 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:05:45,695 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:05:45,695 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:05:45,700 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:05:45,701 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:05:45" (1/1) ... [2023-11-29 00:05:45,702 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b70743b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:05:45, skipping insertion in model container [2023-11-29 00:05:45,702 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:05:45" (1/1) ... [2023-11-29 00:05:45,730 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:05:45,905 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_c7168ca2-ffb4-45ba-a474-72e72ac62c01/sv-benchmarks/c/weaver/unroll-2.wvr.c[2454,2467] [2023-11-29 00:05:45,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:05:45,926 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:05:45,947 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_c7168ca2-ffb4-45ba-a474-72e72ac62c01/sv-benchmarks/c/weaver/unroll-2.wvr.c[2454,2467] [2023-11-29 00:05:45,951 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:05:45,966 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:05:45,967 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:05:45 WrapperNode [2023-11-29 00:05:45,967 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:05:45,968 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:05:45,968 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:05:45,968 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:05:45,976 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:05:45" (1/1) ... [2023-11-29 00:05:45,983 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:05:45" (1/1) ... [2023-11-29 00:05:46,003 INFO L138 Inliner]: procedures = 24, calls = 32, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 139 [2023-11-29 00:05:46,004 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:05:46,005 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:05:46,005 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:05:46,005 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:05:46,014 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:05:45" (1/1) ... [2023-11-29 00:05:46,014 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:05:45" (1/1) ... [2023-11-29 00:05:46,017 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:05:45" (1/1) ... [2023-11-29 00:05:46,031 INFO L175 MemorySlicer]: Split 10 memory accesses to 4 slices as follows [2, 2, 2, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-29 00:05:46,031 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:05:45" (1/1) ... [2023-11-29 00:05:46,031 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:05:45" (1/1) ... [2023-11-29 00:05:46,037 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:05:45" (1/1) ... [2023-11-29 00:05:46,040 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:05:45" (1/1) ... [2023-11-29 00:05:46,042 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:05:45" (1/1) ... [2023-11-29 00:05:46,043 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:05:45" (1/1) ... [2023-11-29 00:05:46,045 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:05:46,046 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:05:46,046 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:05:46,046 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:05:46,047 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:05:45" (1/1) ... [2023-11-29 00:05:46,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:05:46,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:05:46,077 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:05:46,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:05:46,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:05:46,124 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 00:05:46,124 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 00:05:46,124 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 00:05:46,124 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 00:05:46,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:05:46,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 00:05:46,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 00:05:46,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 00:05:46,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:05:46,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 00:05:46,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 00:05:46,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 00:05:46,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 00:05:46,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 00:05:46,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:05:46,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:05:46,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 00:05:46,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 00:05:46,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 00:05:46,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 00:05:46,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:05:46,128 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 00:05:46,229 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:05:46,231 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:05:46,469 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:05:46,695 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:05:46,695 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 00:05:46,695 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:05:46 BoogieIcfgContainer [2023-11-29 00:05:46,695 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:05:46,698 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:05:46,698 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:05:46,702 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:05:46,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:05:45" (1/3) ... [2023-11-29 00:05:46,703 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46c85564 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:05:46, skipping insertion in model container [2023-11-29 00:05:46,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:05:45" (2/3) ... [2023-11-29 00:05:46,703 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46c85564 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:05:46, skipping insertion in model container [2023-11-29 00:05:46,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:05:46" (3/3) ... [2023-11-29 00:05:46,704 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2023-11-29 00:05:46,714 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 00:05:46,725 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:05:46,725 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:05:46,725 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 00:05:46,764 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 00:05:46,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 21 transitions, 56 flow [2023-11-29 00:05:46,825 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2023-11-29 00:05:46,825 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 00:05:46,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 3/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2023-11-29 00:05:46,828 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 21 transitions, 56 flow [2023-11-29 00:05:46,831 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 18 transitions, 48 flow [2023-11-29 00:05:46,842 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:05:46,850 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;@6d36c2c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:05:46,850 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 00:05:46,860 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:05:46,860 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2023-11-29 00:05:46,861 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 00:05:46,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:05:46,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:05:46,862 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:05:46,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:05:46,868 INFO L85 PathProgramCache]: Analyzing trace with hash 792465794, now seen corresponding path program 1 times [2023-11-29 00:05:46,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:05:46,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493737449] [2023-11-29 00:05:46,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:05:46,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:05:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:05:47,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:05:47,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:05:47,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493737449] [2023-11-29 00:05:47,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493737449] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:05:47,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:05:47,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:05:47,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839325905] [2023-11-29 00:05:47,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:05:47,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:05:47,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:05:47,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:05:47,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:05:47,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:05:47,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:47,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:05:47,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:05:47,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:05:47,346 INFO L124 PetriNetUnfolderBase]: 75/137 cut-off events. [2023-11-29 00:05:47,346 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-29 00:05:47,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 137 events. 75/137 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 358 event pairs, 24 based on Foata normal form. 1/105 useless extension candidates. Maximal degree in co-relation 220. Up to 79 conditions per place. [2023-11-29 00:05:47,350 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 25 selfloop transitions, 3 changer transitions 1/30 dead transitions. [2023-11-29 00:05:47,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 30 transitions, 139 flow [2023-11-29 00:05:47,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:05:47,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:05:47,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 39 transitions. [2023-11-29 00:05:47,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2023-11-29 00:05:47,363 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 39 transitions. [2023-11-29 00:05:47,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 39 transitions. [2023-11-29 00:05:47,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:05:47,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 39 transitions. [2023-11-29 00:05:47,368 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) [2023-11-29 00:05:47,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:47,370 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:47,372 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 48 flow. Second operand 3 states and 39 transitions. [2023-11-29 00:05:47,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 30 transitions, 139 flow [2023-11-29 00:05:47,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 30 transitions, 125 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 00:05:47,377 INFO L231 Difference]: Finished difference. Result has 21 places, 20 transitions, 59 flow [2023-11-29 00:05:47,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=21, PETRI_TRANSITIONS=20} [2023-11-29 00:05:47,381 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2023-11-29 00:05:47,382 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 20 transitions, 59 flow [2023-11-29 00:05:47,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:47,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:05:47,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:05:47,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:05:47,383 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:05:47,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:05:47,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1619189987, now seen corresponding path program 1 times [2023-11-29 00:05:47,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:05:47,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024338588] [2023-11-29 00:05:47,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:05:47,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:05:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:05:47,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:05:47,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:05:47,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024338588] [2023-11-29 00:05:47,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024338588] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:05:47,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:05:47,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:05:47,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166453421] [2023-11-29 00:05:47,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:05:47,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:05:47,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:05:47,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:05:47,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:05:47,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:05:47,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 20 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:47,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:05:47,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:05:47,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:05:47,608 INFO L124 PetriNetUnfolderBase]: 75/138 cut-off events. [2023-11-29 00:05:47,608 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-11-29 00:05:47,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 138 events. 75/138 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 330 event pairs, 48 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 120. Up to 137 conditions per place. [2023-11-29 00:05:47,611 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 18 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-11-29 00:05:47,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 101 flow [2023-11-29 00:05:47,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:05:47,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:05:47,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 28 transitions. [2023-11-29 00:05:47,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-29 00:05:47,612 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 28 transitions. [2023-11-29 00:05:47,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 28 transitions. [2023-11-29 00:05:47,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:05:47,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 28 transitions. [2023-11-29 00:05:47,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:47,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:47,614 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:47,614 INFO L175 Difference]: Start difference. First operand has 21 places, 20 transitions, 59 flow. Second operand 3 states and 28 transitions. [2023-11-29 00:05:47,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 101 flow [2023-11-29 00:05:47,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 21 transitions, 98 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:05:47,618 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 68 flow [2023-11-29 00:05:47,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-11-29 00:05:47,619 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2023-11-29 00:05:47,619 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 68 flow [2023-11-29 00:05:47,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:47,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:05:47,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:05:47,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 00:05:47,620 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:05:47,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:05:47,621 INFO L85 PathProgramCache]: Analyzing trace with hash 43187384, now seen corresponding path program 1 times [2023-11-29 00:05:47,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:05:47,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923375735] [2023-11-29 00:05:47,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:05:47,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:05:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:05:47,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:05:47,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:05:47,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923375735] [2023-11-29 00:05:47,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923375735] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:05:47,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796884003] [2023-11-29 00:05:47,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:05:47,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:05:47,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:05:47,818 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:05:47,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:05:47,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:05:47,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:05:47,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:05:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:05:48,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:05:48,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:05:48,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796884003] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:05:48,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:05:48,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-11-29 00:05:48,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385165877] [2023-11-29 00:05:48,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:05:48,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:05:48,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:05:48,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:05:48,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:05:48,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:05:48,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:48,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:05:48,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:05:48,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:05:48,178 INFO L124 PetriNetUnfolderBase]: 83/152 cut-off events. [2023-11-29 00:05:48,178 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-29 00:05:48,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 152 events. 83/152 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 413 event pairs, 24 based on Foata normal form. 6/157 useless extension candidates. Maximal degree in co-relation 348. Up to 78 conditions per place. [2023-11-29 00:05:48,180 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 31 selfloop transitions, 4 changer transitions 1/37 dead transitions. [2023-11-29 00:05:48,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 37 transitions, 180 flow [2023-11-29 00:05:48,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:05:48,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:05:48,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 48 transitions. [2023-11-29 00:05:48,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2023-11-29 00:05:48,182 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 48 transitions. [2023-11-29 00:05:48,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 48 transitions. [2023-11-29 00:05:48,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:05:48,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 48 transitions. [2023-11-29 00:05:48,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:48,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:48,184 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:48,184 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 68 flow. Second operand 4 states and 48 transitions. [2023-11-29 00:05:48,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 37 transitions, 180 flow [2023-11-29 00:05:48,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 37 transitions, 176 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 00:05:48,187 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 90 flow [2023-11-29 00:05:48,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-11-29 00:05:48,188 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 5 predicate places. [2023-11-29 00:05:48,188 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 90 flow [2023-11-29 00:05:48,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:48,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:05:48,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:05:48,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:05:48,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:05:48,393 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:05:48,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:05:48,393 INFO L85 PathProgramCache]: Analyzing trace with hash 655494007, now seen corresponding path program 1 times [2023-11-29 00:05:48,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:05:48,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235665838] [2023-11-29 00:05:48,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:05:48,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:05:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:05:48,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:05:48,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:05:48,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235665838] [2023-11-29 00:05:48,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235665838] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:05:48,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:05:48,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:05:48,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091735065] [2023-11-29 00:05:48,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:05:48,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:05:48,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:05:48,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:05:48,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:05:48,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:05:48,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:48,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:05:48,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:05:48,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:05:48,687 INFO L124 PetriNetUnfolderBase]: 93/186 cut-off events. [2023-11-29 00:05:48,687 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2023-11-29 00:05:48,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 186 events. 93/186 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 636 event pairs, 26 based on Foata normal form. 12/197 useless extension candidates. Maximal degree in co-relation 492. Up to 101 conditions per place. [2023-11-29 00:05:48,690 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 33 selfloop transitions, 4 changer transitions 8/46 dead transitions. [2023-11-29 00:05:48,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 46 transitions, 255 flow [2023-11-29 00:05:48,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:05:48,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:05:48,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2023-11-29 00:05:48,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2023-11-29 00:05:48,692 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 56 transitions. [2023-11-29 00:05:48,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 56 transitions. [2023-11-29 00:05:48,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:05:48,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 56 transitions. [2023-11-29 00:05:48,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:48,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:48,694 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:48,694 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 90 flow. Second operand 5 states and 56 transitions. [2023-11-29 00:05:48,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 46 transitions, 255 flow [2023-11-29 00:05:48,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 46 transitions, 250 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 00:05:48,697 INFO L231 Difference]: Finished difference. Result has 33 places, 25 transitions, 117 flow [2023-11-29 00:05:48,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=117, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2023-11-29 00:05:48,698 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 11 predicate places. [2023-11-29 00:05:48,698 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 117 flow [2023-11-29 00:05:48,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:48,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:05:48,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:05:48,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 00:05:48,699 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:05:48,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:05:48,700 INFO L85 PathProgramCache]: Analyzing trace with hash 499055579, now seen corresponding path program 2 times [2023-11-29 00:05:48,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:05:48,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771122540] [2023-11-29 00:05:48,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:05:48,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:05:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:05:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:05:48,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:05:48,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771122540] [2023-11-29 00:05:48,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771122540] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:05:48,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99551371] [2023-11-29 00:05:48,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:05:48,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:05:48,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:05:48,868 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:05:48,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:05:48,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:05:48,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:05:48,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:05:48,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:05:49,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:05:49,004 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:05:49,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99551371] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:05:49,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:05:49,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2023-11-29 00:05:49,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894453077] [2023-11-29 00:05:49,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:05:49,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:05:49,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:05:49,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:05:49,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:05:49,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:05:49,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 117 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:49,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:05:49,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:05:49,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:05:49,116 INFO L124 PetriNetUnfolderBase]: 93/181 cut-off events. [2023-11-29 00:05:49,116 INFO L125 PetriNetUnfolderBase]: For 221/221 co-relation queries the response was YES. [2023-11-29 00:05:49,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 612 conditions, 181 events. 93/181 cut-off events. For 221/221 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 554 event pairs, 28 based on Foata normal form. 4/184 useless extension candidates. Maximal degree in co-relation 590. Up to 114 conditions per place. [2023-11-29 00:05:49,119 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 29 selfloop transitions, 4 changer transitions 4/38 dead transitions. [2023-11-29 00:05:49,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 38 transitions, 242 flow [2023-11-29 00:05:49,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:05:49,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:05:49,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2023-11-29 00:05:49,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2023-11-29 00:05:49,121 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 46 transitions. [2023-11-29 00:05:49,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 46 transitions. [2023-11-29 00:05:49,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:05:49,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 46 transitions. [2023-11-29 00:05:49,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.5) internal successors, (46), 4 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) [2023-11-29 00:05:49,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:49,122 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:49,123 INFO L175 Difference]: Start difference. First operand has 33 places, 25 transitions, 117 flow. Second operand 4 states and 46 transitions. [2023-11-29 00:05:49,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 38 transitions, 242 flow [2023-11-29 00:05:49,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 38 transitions, 229 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-29 00:05:49,126 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 136 flow [2023-11-29 00:05:49,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2023-11-29 00:05:49,127 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 13 predicate places. [2023-11-29 00:05:49,127 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 136 flow [2023-11-29 00:05:49,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:49,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:05:49,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:05:49,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:05:49,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:05:49,329 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:05:49,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:05:49,329 INFO L85 PathProgramCache]: Analyzing trace with hash -694734112, now seen corresponding path program 2 times [2023-11-29 00:05:49,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:05:49,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565213382] [2023-11-29 00:05:49,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:05:49,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:05:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:05:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:05:49,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:05:49,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565213382] [2023-11-29 00:05:49,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565213382] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:05:49,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:05:49,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:05:49,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531319922] [2023-11-29 00:05:49,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:05:49,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:05:49,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:05:49,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:05:49,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:05:49,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:05:49,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:49,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:05:49,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:05:49,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:05:49,586 INFO L124 PetriNetUnfolderBase]: 103/204 cut-off events. [2023-11-29 00:05:49,586 INFO L125 PetriNetUnfolderBase]: For 326/326 co-relation queries the response was YES. [2023-11-29 00:05:49,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 204 events. 103/204 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 693 event pairs, 26 based on Foata normal form. 2/205 useless extension candidates. Maximal degree in co-relation 684. Up to 107 conditions per place. [2023-11-29 00:05:49,589 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 33 selfloop transitions, 9 changer transitions 10/53 dead transitions. [2023-11-29 00:05:49,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 53 transitions, 355 flow [2023-11-29 00:05:49,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:05:49,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 00:05:49,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 63 transitions. [2023-11-29 00:05:49,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-29 00:05:49,590 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 63 transitions. [2023-11-29 00:05:49,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 63 transitions. [2023-11-29 00:05:49,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:05:49,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 63 transitions. [2023-11-29 00:05:49,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:49,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 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) [2023-11-29 00:05:49,592 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 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) [2023-11-29 00:05:49,592 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 136 flow. Second operand 6 states and 63 transitions. [2023-11-29 00:05:49,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 53 transitions, 355 flow [2023-11-29 00:05:49,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 53 transitions, 350 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:05:49,596 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 193 flow [2023-11-29 00:05:49,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=193, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2023-11-29 00:05:49,597 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 19 predicate places. [2023-11-29 00:05:49,598 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 193 flow [2023-11-29 00:05:49,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:49,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:05:49,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:05:49,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 00:05:49,598 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:05:49,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:05:49,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1389158956, now seen corresponding path program 3 times [2023-11-29 00:05:49,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:05:49,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972204027] [2023-11-29 00:05:49,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:05:49,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:05:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:05:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:05:49,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:05:49,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972204027] [2023-11-29 00:05:49,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972204027] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:05:49,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062532339] [2023-11-29 00:05:49,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:05:49,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:05:49,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:05:49,737 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:05:49,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:05:49,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 00:05:49,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:05:49,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:05:49,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:05:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:05:49,890 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:05:49,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062532339] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:05:49,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:05:49,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2023-11-29 00:05:49,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475523898] [2023-11-29 00:05:49,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:05:49,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:05:49,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:05:49,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:05:49,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:05:49,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:05:49,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 193 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:49,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:05:49,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:05:49,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:05:50,010 INFO L124 PetriNetUnfolderBase]: 114/225 cut-off events. [2023-11-29 00:05:50,011 INFO L125 PetriNetUnfolderBase]: For 447/447 co-relation queries the response was YES. [2023-11-29 00:05:50,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 891 conditions, 225 events. 114/225 cut-off events. For 447/447 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 739 event pairs, 44 based on Foata normal form. 6/230 useless extension candidates. Maximal degree in co-relation 866. Up to 145 conditions per place. [2023-11-29 00:05:50,014 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 35 selfloop transitions, 11 changer transitions 2/49 dead transitions. [2023-11-29 00:05:50,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 384 flow [2023-11-29 00:05:50,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:05:50,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:05:50,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2023-11-29 00:05:50,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2023-11-29 00:05:50,016 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 47 transitions. [2023-11-29 00:05:50,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 47 transitions. [2023-11-29 00:05:50,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:05:50,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 47 transitions. [2023-11-29 00:05:50,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:50,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:50,017 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:50,017 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 193 flow. Second operand 4 states and 47 transitions. [2023-11-29 00:05:50,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 384 flow [2023-11-29 00:05:50,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 49 transitions, 362 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-29 00:05:50,022 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 249 flow [2023-11-29 00:05:50,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=249, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-11-29 00:05:50,023 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 21 predicate places. [2023-11-29 00:05:50,023 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 249 flow [2023-11-29 00:05:50,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:50,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:05:50,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:05:50,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 00:05:50,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:05:50,225 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:05:50,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:05:50,225 INFO L85 PathProgramCache]: Analyzing trace with hash -928923511, now seen corresponding path program 3 times [2023-11-29 00:05:50,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:05:50,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206267096] [2023-11-29 00:05:50,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:05:50,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:05:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:05:50,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:05:50,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:05:50,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206267096] [2023-11-29 00:05:50,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206267096] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:05:50,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137511543] [2023-11-29 00:05:50,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:05:50,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:05:50,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:05:50,425 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:05:50,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:05:50,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 00:05:50,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:05:50,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:05:50,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:05:50,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:05:50,561 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:05:50,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137511543] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:05:50,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:05:50,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-11-29 00:05:50,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898579570] [2023-11-29 00:05:50,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:05:50,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:05:50,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:05:50,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:05:50,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:05:50,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:05:50,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 249 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:50,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:05:50,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:05:50,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:05:50,683 INFO L124 PetriNetUnfolderBase]: 114/218 cut-off events. [2023-11-29 00:05:50,683 INFO L125 PetriNetUnfolderBase]: For 585/585 co-relation queries the response was YES. [2023-11-29 00:05:50,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 971 conditions, 218 events. 114/218 cut-off events. For 585/585 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 706 event pairs, 34 based on Foata normal form. 4/221 useless extension candidates. Maximal degree in co-relation 944. Up to 149 conditions per place. [2023-11-29 00:05:50,686 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 31 selfloop transitions, 12 changer transitions 4/48 dead transitions. [2023-11-29 00:05:50,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 48 transitions, 422 flow [2023-11-29 00:05:50,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:05:50,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:05:50,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 51 transitions. [2023-11-29 00:05:50,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2023-11-29 00:05:50,687 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 51 transitions. [2023-11-29 00:05:50,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 51 transitions. [2023-11-29 00:05:50,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:05:50,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 51 transitions. [2023-11-29 00:05:50,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 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) [2023-11-29 00:05:50,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:50,689 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:50,689 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 249 flow. Second operand 5 states and 51 transitions. [2023-11-29 00:05:50,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 48 transitions, 422 flow [2023-11-29 00:05:50,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 48 transitions, 405 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-29 00:05:50,694 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 294 flow [2023-11-29 00:05:50,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2023-11-29 00:05:50,694 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2023-11-29 00:05:50,695 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 294 flow [2023-11-29 00:05:50,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:50,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:05:50,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:05:50,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:05:50,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:05:50,897 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:05:50,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:05:50,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1132757608, now seen corresponding path program 4 times [2023-11-29 00:05:50,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:05:50,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691466140] [2023-11-29 00:05:50,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:05:50,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:05:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:05:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:05:50,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:05:50,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691466140] [2023-11-29 00:05:50,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691466140] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:05:50,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:05:50,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:05:50,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668201298] [2023-11-29 00:05:50,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:05:50,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:05:50,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:05:50,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:05:50,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:05:50,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:05:50,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 294 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:50,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:05:50,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:05:50,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:05:51,109 INFO L124 PetriNetUnfolderBase]: 100/182 cut-off events. [2023-11-29 00:05:51,109 INFO L125 PetriNetUnfolderBase]: For 667/667 co-relation queries the response was YES. [2023-11-29 00:05:51,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853 conditions, 182 events. 100/182 cut-off events. For 667/667 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 521 event pairs, 31 based on Foata normal form. 4/185 useless extension candidates. Maximal degree in co-relation 825. Up to 130 conditions per place. [2023-11-29 00:05:51,112 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 32 selfloop transitions, 9 changer transitions 4/46 dead transitions. [2023-11-29 00:05:51,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 435 flow [2023-11-29 00:05:51,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:05:51,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:05:51,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 45 transitions. [2023-11-29 00:05:51,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-11-29 00:05:51,113 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 45 transitions. [2023-11-29 00:05:51,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 45 transitions. [2023-11-29 00:05:51,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:05:51,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 45 transitions. [2023-11-29 00:05:51,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 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) [2023-11-29 00:05:51,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:51,115 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:51,115 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 294 flow. Second operand 5 states and 45 transitions. [2023-11-29 00:05:51,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 435 flow [2023-11-29 00:05:51,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 399 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-29 00:05:51,120 INFO L231 Difference]: Finished difference. Result has 48 places, 36 transitions, 297 flow [2023-11-29 00:05:51,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=297, PETRI_PLACES=48, PETRI_TRANSITIONS=36} [2023-11-29 00:05:51,121 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 26 predicate places. [2023-11-29 00:05:51,121 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 36 transitions, 297 flow [2023-11-29 00:05:51,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:51,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:05:51,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:05:51,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 00:05:51,122 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:05:51,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:05:51,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1203904628, now seen corresponding path program 1 times [2023-11-29 00:05:51,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:05:51,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092548586] [2023-11-29 00:05:51,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:05:51,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:05:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:05:51,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:05:51,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:05:51,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092548586] [2023-11-29 00:05:51,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092548586] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:05:51,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969378383] [2023-11-29 00:05:51,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:05:51,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:05:51,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:05:51,234 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:05:51,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:05:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:05:51,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 00:05:51,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:05:51,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 00:05:51,502 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:05:51,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 18 [2023-11-29 00:05:51,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:05:51,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:05:51,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2023-11-29 00:05:51,830 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:05:51,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 188 [2023-11-29 00:05:52,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:05:52,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969378383] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:05:52,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:05:52,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 13 [2023-11-29 00:05:52,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721173398] [2023-11-29 00:05:52,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:05:52,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 00:05:52,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:05:52,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 00:05:52,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:05:52,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:05:52,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 36 transitions, 297 flow. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 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) [2023-11-29 00:05:52,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:05:52,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:05:52,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:05:53,328 INFO L124 PetriNetUnfolderBase]: 227/400 cut-off events. [2023-11-29 00:05:53,328 INFO L125 PetriNetUnfolderBase]: For 1367/1367 co-relation queries the response was YES. [2023-11-29 00:05:53,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1955 conditions, 400 events. 227/400 cut-off events. For 1367/1367 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1463 event pairs, 14 based on Foata normal form. 25/423 useless extension candidates. Maximal degree in co-relation 1725. Up to 181 conditions per place. [2023-11-29 00:05:53,333 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 40 selfloop transitions, 17 changer transitions 59/117 dead transitions. [2023-11-29 00:05:53,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 117 transitions, 1091 flow [2023-11-29 00:05:53,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 00:05:53,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 00:05:53,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 151 transitions. [2023-11-29 00:05:53,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42296918767507 [2023-11-29 00:05:53,335 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 151 transitions. [2023-11-29 00:05:53,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 151 transitions. [2023-11-29 00:05:53,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:05:53,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 151 transitions. [2023-11-29 00:05:53,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 8.882352941176471) internal successors, (151), 17 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:53,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 21.0) internal successors, (378), 18 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:53,338 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 21.0) internal successors, (378), 18 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:53,338 INFO L175 Difference]: Start difference. First operand has 48 places, 36 transitions, 297 flow. Second operand 17 states and 151 transitions. [2023-11-29 00:05:53,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 117 transitions, 1091 flow [2023-11-29 00:05:53,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 117 transitions, 1007 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-11-29 00:05:53,346 INFO L231 Difference]: Finished difference. Result has 64 places, 39 transitions, 365 flow [2023-11-29 00:05:53,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=365, PETRI_PLACES=64, PETRI_TRANSITIONS=39} [2023-11-29 00:05:53,347 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 42 predicate places. [2023-11-29 00:05:53,347 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 39 transitions, 365 flow [2023-11-29 00:05:53,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 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) [2023-11-29 00:05:53,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:05:53,348 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:05:53,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:05:53,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 00:05:53,554 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:05:53,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:05:53,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1670041114, now seen corresponding path program 2 times [2023-11-29 00:05:53,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:05:53,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857645552] [2023-11-29 00:05:53,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:05:53,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:05:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:05:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:05:54,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:05:54,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857645552] [2023-11-29 00:05:54,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857645552] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:05:54,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009759442] [2023-11-29 00:05:54,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:05:54,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:05:54,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:05:54,768 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:05:54,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:05:54,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:05:54,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:05:54,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 00:05:54,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:05:55,029 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:05:55,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-11-29 00:05:55,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:05:55,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:05:55,139 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-29 00:05:55,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-11-29 00:05:55,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:05:55,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009759442] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:05:55,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:05:55,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 4] total 15 [2023-11-29 00:05:55,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665503959] [2023-11-29 00:05:55,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:05:55,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:05:55,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:05:55,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:05:55,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:05:55,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:05:55,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 39 transitions, 365 flow. Second operand has 16 states, 16 states have (on average 5.75) internal successors, (92), 16 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:55,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:05:55,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:05:55,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:05:55,761 INFO L124 PetriNetUnfolderBase]: 205/369 cut-off events. [2023-11-29 00:05:55,761 INFO L125 PetriNetUnfolderBase]: For 1615/1615 co-relation queries the response was YES. [2023-11-29 00:05:55,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1977 conditions, 369 events. 205/369 cut-off events. For 1615/1615 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1194 event pairs, 28 based on Foata normal form. 1/368 useless extension candidates. Maximal degree in co-relation 1943. Up to 193 conditions per place. [2023-11-29 00:05:55,766 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 68 selfloop transitions, 36 changer transitions 1/106 dead transitions. [2023-11-29 00:05:55,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 106 transitions, 1070 flow [2023-11-29 00:05:55,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 00:05:55,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 00:05:55,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 128 transitions. [2023-11-29 00:05:55,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40634920634920635 [2023-11-29 00:05:55,768 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 128 transitions. [2023-11-29 00:05:55,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 128 transitions. [2023-11-29 00:05:55,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:05:55,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 128 transitions. [2023-11-29 00:05:55,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 8.533333333333333) internal successors, (128), 15 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:55,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 21.0) internal successors, (336), 16 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:55,770 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 21.0) internal successors, (336), 16 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:55,770 INFO L175 Difference]: Start difference. First operand has 64 places, 39 transitions, 365 flow. Second operand 15 states and 128 transitions. [2023-11-29 00:05:55,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 106 transitions, 1070 flow [2023-11-29 00:05:55,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 106 transitions, 939 flow, removed 44 selfloop flow, removed 8 redundant places. [2023-11-29 00:05:55,780 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 644 flow [2023-11-29 00:05:55,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=644, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2023-11-29 00:05:55,781 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 42 predicate places. [2023-11-29 00:05:55,781 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 644 flow [2023-11-29 00:05:55,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.75) internal successors, (92), 16 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:55,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:05:55,782 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:05:55,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:05:55,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 00:05:55,988 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:05:55,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:05:55,988 INFO L85 PathProgramCache]: Analyzing trace with hash -881867696, now seen corresponding path program 3 times [2023-11-29 00:05:55,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:05:55,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667847684] [2023-11-29 00:05:55,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:05:55,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:05:56,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:05:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:05:56,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:05:56,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667847684] [2023-11-29 00:05:56,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667847684] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:05:56,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634581032] [2023-11-29 00:05:56,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:05:56,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:05:56,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:05:56,893 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:05:56,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:05:56,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 00:05:56,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:05:56,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 00:05:57,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:05:57,170 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:05:57,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-11-29 00:05:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:05:57,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:05:57,274 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-29 00:05:57,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-11-29 00:05:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:05:57,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634581032] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:05:57,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:05:57,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 4] total 15 [2023-11-29 00:05:57,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392157411] [2023-11-29 00:05:57,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:05:57,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:05:57,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:05:57,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:05:57,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:05:57,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:05:57,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 644 flow. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:57,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:05:57,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:05:57,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:05:57,867 INFO L124 PetriNetUnfolderBase]: 325/588 cut-off events. [2023-11-29 00:05:57,868 INFO L125 PetriNetUnfolderBase]: For 2183/2183 co-relation queries the response was YES. [2023-11-29 00:05:57,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3032 conditions, 588 events. 325/588 cut-off events. For 2183/2183 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2315 event pairs, 54 based on Foata normal form. 1/588 useless extension candidates. Maximal degree in co-relation 2660. Up to 310 conditions per place. [2023-11-29 00:05:57,875 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 88 selfloop transitions, 42 changer transitions 1/132 dead transitions. [2023-11-29 00:05:57,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 132 transitions, 1327 flow [2023-11-29 00:05:57,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 00:05:57,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 00:05:57,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 138 transitions. [2023-11-29 00:05:57,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2023-11-29 00:05:57,877 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 138 transitions. [2023-11-29 00:05:57,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 138 transitions. [2023-11-29 00:05:57,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:05:57,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 138 transitions. [2023-11-29 00:05:57,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 9.2) internal successors, (138), 15 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:57,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 21.0) internal successors, (336), 16 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:57,879 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 21.0) internal successors, (336), 16 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:57,880 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 644 flow. Second operand 15 states and 138 transitions. [2023-11-29 00:05:57,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 132 transitions, 1327 flow [2023-11-29 00:05:57,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 132 transitions, 1249 flow, removed 37 selfloop flow, removed 2 redundant places. [2023-11-29 00:05:57,890 INFO L231 Difference]: Finished difference. Result has 77 places, 80 transitions, 873 flow [2023-11-29 00:05:57,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=873, PETRI_PLACES=77, PETRI_TRANSITIONS=80} [2023-11-29 00:05:57,891 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 55 predicate places. [2023-11-29 00:05:57,892 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 80 transitions, 873 flow [2023-11-29 00:05:57,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:57,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:05:57,892 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:05:57,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:05:58,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 00:05:58,095 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:05:58,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:05:58,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1678446242, now seen corresponding path program 4 times [2023-11-29 00:05:58,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:05:58,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223228915] [2023-11-29 00:05:58,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:05:58,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:05:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:05:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:05:58,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:05:58,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223228915] [2023-11-29 00:05:58,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223228915] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:05:58,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681014994] [2023-11-29 00:05:58,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:05:58,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:05:58,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:05:58,883 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:05:58,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:05:58,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:05:58,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:05:58,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 00:05:58,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:05:59,139 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:05:59,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-11-29 00:05:59,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:05:59,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:05:59,250 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-29 00:05:59,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-11-29 00:05:59,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:05:59,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681014994] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:05:59,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:05:59,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 4] total 15 [2023-11-29 00:05:59,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513521537] [2023-11-29 00:05:59,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:05:59,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:05:59,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:05:59,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:05:59,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:05:59,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:05:59,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 80 transitions, 873 flow. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:59,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:05:59,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:05:59,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:05:59,737 INFO L124 PetriNetUnfolderBase]: 421/759 cut-off events. [2023-11-29 00:05:59,737 INFO L125 PetriNetUnfolderBase]: For 3440/3440 co-relation queries the response was YES. [2023-11-29 00:05:59,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4006 conditions, 759 events. 421/759 cut-off events. For 3440/3440 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3311 event pairs, 78 based on Foata normal form. 1/760 useless extension candidates. Maximal degree in co-relation 3541. Up to 557 conditions per place. [2023-11-29 00:05:59,745 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 100 selfloop transitions, 36 changer transitions 1/138 dead transitions. [2023-11-29 00:05:59,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 138 transitions, 1566 flow [2023-11-29 00:05:59,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 00:05:59,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 00:05:59,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 126 transitions. [2023-11-29 00:05:59,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-11-29 00:05:59,747 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 126 transitions. [2023-11-29 00:05:59,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 126 transitions. [2023-11-29 00:05:59,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:05:59,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 126 transitions. [2023-11-29 00:05:59,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 8.4) internal successors, (126), 15 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) [2023-11-29 00:05:59,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 21.0) internal successors, (336), 16 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:59,749 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 21.0) internal successors, (336), 16 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:59,749 INFO L175 Difference]: Start difference. First operand has 77 places, 80 transitions, 873 flow. Second operand 15 states and 126 transitions. [2023-11-29 00:05:59,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 138 transitions, 1566 flow [2023-11-29 00:05:59,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 138 transitions, 1461 flow, removed 34 selfloop flow, removed 8 redundant places. [2023-11-29 00:05:59,760 INFO L231 Difference]: Finished difference. Result has 84 places, 98 transitions, 1081 flow [2023-11-29 00:05:59,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1081, PETRI_PLACES=84, PETRI_TRANSITIONS=98} [2023-11-29 00:05:59,761 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 62 predicate places. [2023-11-29 00:05:59,761 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 98 transitions, 1081 flow [2023-11-29 00:05:59,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:59,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:05:59,761 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:05:59,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:05:59,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 00:05:59,963 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:05:59,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:05:59,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1323799445, now seen corresponding path program 5 times [2023-11-29 00:05:59,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:05:59,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941187861] [2023-11-29 00:05:59,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:05:59,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:05:59,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:06:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:00,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:06:00,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941187861] [2023-11-29 00:06:00,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941187861] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:06:00,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527711721] [2023-11-29 00:06:00,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:06:00,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:00,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:06:00,175 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:06:00,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:06:00,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 00:06:00,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:06:00,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:06:00,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:06:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:00,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:06:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:00,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527711721] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:06:00,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:06:00,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-11-29 00:06:00,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6013241] [2023-11-29 00:06:00,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:06:00,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 00:06:00,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:06:00,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 00:06:00,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:06:00,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:06:00,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 98 transitions, 1081 flow. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 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) [2023-11-29 00:06:00,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:06:00,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:06:00,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:06:01,484 INFO L124 PetriNetUnfolderBase]: 641/1169 cut-off events. [2023-11-29 00:06:01,484 INFO L125 PetriNetUnfolderBase]: For 4700/4700 co-relation queries the response was YES. [2023-11-29 00:06:01,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6081 conditions, 1169 events. 641/1169 cut-off events. For 4700/4700 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5610 event pairs, 92 based on Foata normal form. 12/1181 useless extension candidates. Maximal degree in co-relation 5189. Up to 399 conditions per place. [2023-11-29 00:06:01,498 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 134 selfloop transitions, 47 changer transitions 0/182 dead transitions. [2023-11-29 00:06:01,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 182 transitions, 2153 flow [2023-11-29 00:06:01,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 00:06:01,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 00:06:01,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2023-11-29 00:06:01,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5194805194805194 [2023-11-29 00:06:01,500 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 120 transitions. [2023-11-29 00:06:01,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 120 transitions. [2023-11-29 00:06:01,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:06:01,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 120 transitions. [2023-11-29 00:06:01,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 10.909090909090908) internal successors, (120), 11 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:01,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 21.0) internal successors, (252), 12 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:01,502 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 21.0) internal successors, (252), 12 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:01,502 INFO L175 Difference]: Start difference. First operand has 84 places, 98 transitions, 1081 flow. Second operand 11 states and 120 transitions. [2023-11-29 00:06:01,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 182 transitions, 2153 flow [2023-11-29 00:06:01,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 182 transitions, 1978 flow, removed 76 selfloop flow, removed 6 redundant places. [2023-11-29 00:06:01,520 INFO L231 Difference]: Finished difference. Result has 95 places, 116 transitions, 1384 flow [2023-11-29 00:06:01,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1384, PETRI_PLACES=95, PETRI_TRANSITIONS=116} [2023-11-29 00:06:01,521 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 73 predicate places. [2023-11-29 00:06:01,521 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 116 transitions, 1384 flow [2023-11-29 00:06:01,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 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) [2023-11-29 00:06:01,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:06:01,522 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:06:01,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:06:01,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 00:06:01,724 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:06:01,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:06:01,725 INFO L85 PathProgramCache]: Analyzing trace with hash -222521120, now seen corresponding path program 6 times [2023-11-29 00:06:01,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:06:01,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516911500] [2023-11-29 00:06:01,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:06:01,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:06:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:06:01,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:01,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:06:01,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516911500] [2023-11-29 00:06:01,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516911500] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:06:01,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363182906] [2023-11-29 00:06:01,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:06:01,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:01,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:06:01,941 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:06:01,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:06:02,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 00:06:02,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:06:02,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:06:02,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:06:02,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:02,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:06:02,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:02,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363182906] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:06:02,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:06:02,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-11-29 00:06:02,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751109577] [2023-11-29 00:06:02,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:06:02,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:06:02,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:06:02,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:06:02,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:06:02,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:06:02,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 116 transitions, 1384 flow. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:02,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:06:02,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:06:02,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:06:03,294 INFO L124 PetriNetUnfolderBase]: 660/1270 cut-off events. [2023-11-29 00:06:03,294 INFO L125 PetriNetUnfolderBase]: For 8880/8880 co-relation queries the response was YES. [2023-11-29 00:06:03,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6987 conditions, 1270 events. 660/1270 cut-off events. For 8880/8880 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6751 event pairs, 61 based on Foata normal form. 32/1302 useless extension candidates. Maximal degree in co-relation 6519. Up to 435 conditions per place. [2023-11-29 00:06:03,305 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 149 selfloop transitions, 87 changer transitions 30/267 dead transitions. [2023-11-29 00:06:03,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 267 transitions, 3193 flow [2023-11-29 00:06:03,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 00:06:03,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 00:06:03,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 184 transitions. [2023-11-29 00:06:03,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41723356009070295 [2023-11-29 00:06:03,307 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 184 transitions. [2023-11-29 00:06:03,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 184 transitions. [2023-11-29 00:06:03,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:06:03,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 184 transitions. [2023-11-29 00:06:03,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 8.761904761904763) internal successors, (184), 21 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) [2023-11-29 00:06:03,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 21.0) internal successors, (462), 22 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:03,309 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 21.0) internal successors, (462), 22 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:03,309 INFO L175 Difference]: Start difference. First operand has 95 places, 116 transitions, 1384 flow. Second operand 21 states and 184 transitions. [2023-11-29 00:06:03,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 267 transitions, 3193 flow [2023-11-29 00:06:03,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 267 transitions, 3057 flow, removed 38 selfloop flow, removed 3 redundant places. [2023-11-29 00:06:03,343 INFO L231 Difference]: Finished difference. Result has 120 places, 165 transitions, 2140 flow [2023-11-29 00:06:03,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1299, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2140, PETRI_PLACES=120, PETRI_TRANSITIONS=165} [2023-11-29 00:06:03,344 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 98 predicate places. [2023-11-29 00:06:03,344 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 165 transitions, 2140 flow [2023-11-29 00:06:03,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:03,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:06:03,345 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:06:03,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 00:06:03,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:03,546 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:06:03,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:06:03,546 INFO L85 PathProgramCache]: Analyzing trace with hash -577321258, now seen corresponding path program 7 times [2023-11-29 00:06:03,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:06:03,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101248399] [2023-11-29 00:06:03,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:06:03,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:06:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:06:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:03,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:06:03,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101248399] [2023-11-29 00:06:03,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101248399] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:06:03,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948055794] [2023-11-29 00:06:03,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:06:03,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:03,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:06:03,782 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:06:03,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:06:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:06:03,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:06:03,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:06:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:03,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:06:04,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:04,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948055794] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:06:04,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:06:04,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-29 00:06:04,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479653050] [2023-11-29 00:06:04,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:06:04,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:06:04,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:06:04,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:06:04,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:06:04,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:06:04,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 165 transitions, 2140 flow. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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) [2023-11-29 00:06:04,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:06:04,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:06:04,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:06:04,991 INFO L124 PetriNetUnfolderBase]: 638/1221 cut-off events. [2023-11-29 00:06:04,991 INFO L125 PetriNetUnfolderBase]: For 10733/10733 co-relation queries the response was YES. [2023-11-29 00:06:04,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7806 conditions, 1221 events. 638/1221 cut-off events. For 10733/10733 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6374 event pairs, 120 based on Foata normal form. 68/1289 useless extension candidates. Maximal degree in co-relation 7682. Up to 493 conditions per place. [2023-11-29 00:06:05,005 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 121 selfloop transitions, 153 changer transitions 6/281 dead transitions. [2023-11-29 00:06:05,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 281 transitions, 4048 flow [2023-11-29 00:06:05,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 00:06:05,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 00:06:05,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 188 transitions. [2023-11-29 00:06:05,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2023-11-29 00:06:05,007 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 188 transitions. [2023-11-29 00:06:05,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 188 transitions. [2023-11-29 00:06:05,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:06:05,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 188 transitions. [2023-11-29 00:06:05,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 9.4) internal successors, (188), 20 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:05,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 21.0) internal successors, (441), 21 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:05,009 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 21.0) internal successors, (441), 21 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:05,009 INFO L175 Difference]: Start difference. First operand has 120 places, 165 transitions, 2140 flow. Second operand 20 states and 188 transitions. [2023-11-29 00:06:05,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 281 transitions, 4048 flow [2023-11-29 00:06:05,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 281 transitions, 3398 flow, removed 283 selfloop flow, removed 7 redundant places. [2023-11-29 00:06:05,049 INFO L231 Difference]: Finished difference. Result has 133 places, 218 transitions, 3059 flow [2023-11-29 00:06:05,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1650, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3059, PETRI_PLACES=133, PETRI_TRANSITIONS=218} [2023-11-29 00:06:05,049 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 111 predicate places. [2023-11-29 00:06:05,049 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 218 transitions, 3059 flow [2023-11-29 00:06:05,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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) [2023-11-29 00:06:05,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:06:05,049 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:06:05,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:06:05,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 00:06:05,250 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:06:05,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:06:05,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1789827872, now seen corresponding path program 8 times [2023-11-29 00:06:05,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:06:05,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731168072] [2023-11-29 00:06:05,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:06:05,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:06:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:06:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:05,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:06:05,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731168072] [2023-11-29 00:06:05,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731168072] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:06:05,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619825714] [2023-11-29 00:06:05,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:06:05,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:05,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:06:05,456 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:06:05,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:06:05,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:06:05,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:06:05,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:06:05,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:06:05,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:05,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:06:05,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:05,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619825714] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:06:05,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:06:05,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-29 00:06:05,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828135231] [2023-11-29 00:06:05,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:06:05,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 00:06:05,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:06:05,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 00:06:05,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:06:05,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:06:05,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 218 transitions, 3059 flow. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:05,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:06:05,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:06:05,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:06:07,110 INFO L124 PetriNetUnfolderBase]: 643/1313 cut-off events. [2023-11-29 00:06:07,111 INFO L125 PetriNetUnfolderBase]: For 10055/10055 co-relation queries the response was YES. [2023-11-29 00:06:07,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7970 conditions, 1313 events. 643/1313 cut-off events. For 10055/10055 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7435 event pairs, 73 based on Foata normal form. 18/1331 useless extension candidates. Maximal degree in co-relation 7658. Up to 357 conditions per place. [2023-11-29 00:06:07,123 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 144 selfloop transitions, 159 changer transitions 11/315 dead transitions. [2023-11-29 00:06:07,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 315 transitions, 4265 flow [2023-11-29 00:06:07,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 00:06:07,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-29 00:06:07,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 246 transitions. [2023-11-29 00:06:07,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3778801843317972 [2023-11-29 00:06:07,125 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 246 transitions. [2023-11-29 00:06:07,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 246 transitions. [2023-11-29 00:06:07,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:06:07,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 246 transitions. [2023-11-29 00:06:07,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 7.935483870967742) internal successors, (246), 31 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:07,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 21.0) internal successors, (672), 32 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:07,129 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 21.0) internal successors, (672), 32 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:07,129 INFO L175 Difference]: Start difference. First operand has 133 places, 218 transitions, 3059 flow. Second operand 31 states and 246 transitions. [2023-11-29 00:06:07,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 315 transitions, 4265 flow [2023-11-29 00:06:07,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 315 transitions, 3812 flow, removed 194 selfloop flow, removed 5 redundant places. [2023-11-29 00:06:07,175 INFO L231 Difference]: Finished difference. Result has 162 places, 231 transitions, 3171 flow [2023-11-29 00:06:07,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2518, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3171, PETRI_PLACES=162, PETRI_TRANSITIONS=231} [2023-11-29 00:06:07,176 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 140 predicate places. [2023-11-29 00:06:07,176 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 231 transitions, 3171 flow [2023-11-29 00:06:07,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:07,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:06:07,176 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:06:07,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 00:06:07,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 00:06:07,377 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:06:07,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:06:07,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1006233894, now seen corresponding path program 9 times [2023-11-29 00:06:07,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:06:07,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167394853] [2023-11-29 00:06:07,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:06:07,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:06:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:06:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:07,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:06:07,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167394853] [2023-11-29 00:06:07,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167394853] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:06:07,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737685349] [2023-11-29 00:06:07,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:06:07,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:07,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:06:07,543 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:06:07,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:06:07,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 00:06:07,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:06:07,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:06:07,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:06:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:07,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:06:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:07,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737685349] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:06:07,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:06:07,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-29 00:06:07,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621951115] [2023-11-29 00:06:07,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:06:07,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 00:06:07,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:06:07,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 00:06:07,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:06:07,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:06:07,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 231 transitions, 3171 flow. Second operand has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:07,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:06:07,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:06:07,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:06:10,320 INFO L124 PetriNetUnfolderBase]: 796/1620 cut-off events. [2023-11-29 00:06:10,320 INFO L125 PetriNetUnfolderBase]: For 12532/12532 co-relation queries the response was YES. [2023-11-29 00:06:10,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10303 conditions, 1620 events. 796/1620 cut-off events. For 12532/12532 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9828 event pairs, 102 based on Foata normal form. 22/1642 useless extension candidates. Maximal degree in co-relation 10006. Up to 597 conditions per place. [2023-11-29 00:06:10,338 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 186 selfloop transitions, 228 changer transitions 10/425 dead transitions. [2023-11-29 00:06:10,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 425 transitions, 5915 flow [2023-11-29 00:06:10,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 00:06:10,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-29 00:06:10,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 311 transitions. [2023-11-29 00:06:10,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797313797313797 [2023-11-29 00:06:10,341 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 311 transitions. [2023-11-29 00:06:10,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 311 transitions. [2023-11-29 00:06:10,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:06:10,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 311 transitions. [2023-11-29 00:06:10,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 7.9743589743589745) internal successors, (311), 39 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:10,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 21.0) internal successors, (840), 40 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:10,345 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 21.0) internal successors, (840), 40 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:10,345 INFO L175 Difference]: Start difference. First operand has 162 places, 231 transitions, 3171 flow. Second operand 39 states and 311 transitions. [2023-11-29 00:06:10,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 425 transitions, 5915 flow [2023-11-29 00:06:10,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 425 transitions, 5323 flow, removed 119 selfloop flow, removed 17 redundant places. [2023-11-29 00:06:10,402 INFO L231 Difference]: Finished difference. Result has 196 places, 320 transitions, 4643 flow [2023-11-29 00:06:10,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2785, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4643, PETRI_PLACES=196, PETRI_TRANSITIONS=320} [2023-11-29 00:06:10,403 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 174 predicate places. [2023-11-29 00:06:10,403 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 320 transitions, 4643 flow [2023-11-29 00:06:10,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:10,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:06:10,403 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:06:10,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 00:06:10,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:06:10,604 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:06:10,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:06:10,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1054625908, now seen corresponding path program 10 times [2023-11-29 00:06:10,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:06:10,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506623462] [2023-11-29 00:06:10,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:06:10,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:06:10,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:06:10,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:10,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:06:10,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506623462] [2023-11-29 00:06:10,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506623462] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:06:10,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832151855] [2023-11-29 00:06:10,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:06:10,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:10,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:06:10,851 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:06:10,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:06:10,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:06:10,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:06:10,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:06:10,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:06:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:10,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:06:11,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:11,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832151855] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:06:11,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:06:11,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-29 00:06:11,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689186762] [2023-11-29 00:06:11,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:06:11,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 00:06:11,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:06:11,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 00:06:11,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:06:11,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:06:11,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 320 transitions, 4643 flow. Second operand has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:11,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:06:11,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:06:11,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:06:12,814 INFO L124 PetriNetUnfolderBase]: 933/1898 cut-off events. [2023-11-29 00:06:12,814 INFO L125 PetriNetUnfolderBase]: For 15787/15787 co-relation queries the response was YES. [2023-11-29 00:06:12,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12791 conditions, 1898 events. 933/1898 cut-off events. For 15787/15787 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 11886 event pairs, 154 based on Foata normal form. 12/1910 useless extension candidates. Maximal degree in co-relation 12494. Up to 728 conditions per place. [2023-11-29 00:06:12,830 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 220 selfloop transitions, 241 changer transitions 5/467 dead transitions. [2023-11-29 00:06:12,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 467 transitions, 7075 flow [2023-11-29 00:06:12,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 00:06:12,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-29 00:06:12,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 238 transitions. [2023-11-29 00:06:12,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358974358974359 [2023-11-29 00:06:12,832 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 238 transitions. [2023-11-29 00:06:12,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 238 transitions. [2023-11-29 00:06:12,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:06:12,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 238 transitions. [2023-11-29 00:06:12,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 9.153846153846153) internal successors, (238), 26 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:12,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 21.0) internal successors, (567), 27 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:12,834 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 21.0) internal successors, (567), 27 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:12,834 INFO L175 Difference]: Start difference. First operand has 196 places, 320 transitions, 4643 flow. Second operand 26 states and 238 transitions. [2023-11-29 00:06:12,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 467 transitions, 7075 flow [2023-11-29 00:06:12,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 467 transitions, 6727 flow, removed 174 selfloop flow, removed 0 redundant places. [2023-11-29 00:06:12,925 INFO L231 Difference]: Finished difference. Result has 225 places, 370 transitions, 5792 flow [2023-11-29 00:06:12,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4308, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5792, PETRI_PLACES=225, PETRI_TRANSITIONS=370} [2023-11-29 00:06:12,925 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 203 predicate places. [2023-11-29 00:06:12,925 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 370 transitions, 5792 flow [2023-11-29 00:06:12,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:12,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:06:12,926 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:06:12,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 00:06:13,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:13,126 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:06:13,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:06:13,127 INFO L85 PathProgramCache]: Analyzing trace with hash -157880706, now seen corresponding path program 11 times [2023-11-29 00:06:13,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:06:13,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125476652] [2023-11-29 00:06:13,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:06:13,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:06:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:06:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:13,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:06:13,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125476652] [2023-11-29 00:06:13,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125476652] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:06:13,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18006081] [2023-11-29 00:06:13,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:06:13,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:13,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:06:13,361 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:06:13,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:06:13,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:06:13,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:06:13,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:06:13,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:06:13,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:13,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:06:13,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:13,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18006081] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:06:13,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:06:13,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-11-29 00:06:13,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747456294] [2023-11-29 00:06:13,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:06:13,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:06:13,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:06:13,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:06:13,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:06:13,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:06:13,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 370 transitions, 5792 flow. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:13,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:06:13,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:06:13,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:06:15,984 INFO L124 PetriNetUnfolderBase]: 907/1870 cut-off events. [2023-11-29 00:06:15,984 INFO L125 PetriNetUnfolderBase]: For 17446/17446 co-relation queries the response was YES. [2023-11-29 00:06:15,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12976 conditions, 1870 events. 907/1870 cut-off events. For 17446/17446 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11811 event pairs, 80 based on Foata normal form. 24/1894 useless extension candidates. Maximal degree in co-relation 12690. Up to 376 conditions per place. [2023-11-29 00:06:16,002 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 221 selfloop transitions, 258 changer transitions 14/494 dead transitions. [2023-11-29 00:06:16,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 494 transitions, 7669 flow [2023-11-29 00:06:16,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-29 00:06:16,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-29 00:06:16,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 337 transitions. [2023-11-29 00:06:16,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3647186147186147 [2023-11-29 00:06:16,005 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 337 transitions. [2023-11-29 00:06:16,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 337 transitions. [2023-11-29 00:06:16,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:06:16,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 337 transitions. [2023-11-29 00:06:16,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 7.659090909090909) internal successors, (337), 44 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:16,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 21.0) internal successors, (945), 45 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:16,010 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 21.0) internal successors, (945), 45 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:16,010 INFO L175 Difference]: Start difference. First operand has 225 places, 370 transitions, 5792 flow. Second operand 44 states and 337 transitions. [2023-11-29 00:06:16,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 494 transitions, 7669 flow [2023-11-29 00:06:16,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 494 transitions, 7407 flow, removed 68 selfloop flow, removed 9 redundant places. [2023-11-29 00:06:16,125 INFO L231 Difference]: Finished difference. Result has 263 places, 380 transitions, 6306 flow [2023-11-29 00:06:16,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5407, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=6306, PETRI_PLACES=263, PETRI_TRANSITIONS=380} [2023-11-29 00:06:16,126 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 241 predicate places. [2023-11-29 00:06:16,126 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 380 transitions, 6306 flow [2023-11-29 00:06:16,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:16,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:06:16,126 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:06:16,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 00:06:16,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:16,327 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:06:16,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:06:16,327 INFO L85 PathProgramCache]: Analyzing trace with hash 859605916, now seen corresponding path program 12 times [2023-11-29 00:06:16,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:06:16,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305373862] [2023-11-29 00:06:16,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:06:16,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:06:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:06:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:16,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:06:16,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305373862] [2023-11-29 00:06:16,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305373862] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:06:16,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587882761] [2023-11-29 00:06:16,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:06:16,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:16,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:06:16,557 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:06:16,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:06:16,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 00:06:16,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:06:16,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:06:16,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:06:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:16,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:06:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:17,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587882761] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:06:17,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:06:17,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-29 00:06:17,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188558749] [2023-11-29 00:06:17,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:06:17,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 00:06:17,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:06:17,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 00:06:17,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:06:17,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:06:17,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 380 transitions, 6306 flow. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:17,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:06:17,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:06:17,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:06:25,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:06:27,086 INFO L124 PetriNetUnfolderBase]: 1577/3299 cut-off events. [2023-11-29 00:06:27,086 INFO L125 PetriNetUnfolderBase]: For 35656/35656 co-relation queries the response was YES. [2023-11-29 00:06:27,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24395 conditions, 3299 events. 1577/3299 cut-off events. For 35656/35656 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 23948 event pairs, 137 based on Foata normal form. 58/3357 useless extension candidates. Maximal degree in co-relation 24260. Up to 609 conditions per place. [2023-11-29 00:06:27,116 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 386 selfloop transitions, 439 changer transitions 31/857 dead transitions. [2023-11-29 00:06:27,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 857 transitions, 15345 flow [2023-11-29 00:06:27,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 00:06:27,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-29 00:06:27,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 329 transitions. [2023-11-29 00:06:27,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41228070175438597 [2023-11-29 00:06:27,118 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 329 transitions. [2023-11-29 00:06:27,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 329 transitions. [2023-11-29 00:06:27,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:06:27,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 329 transitions. [2023-11-29 00:06:27,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 8.657894736842104) internal successors, (329), 38 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:27,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 21.0) internal successors, (819), 39 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:27,131 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 21.0) internal successors, (819), 39 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:27,131 INFO L175 Difference]: Start difference. First operand has 263 places, 380 transitions, 6306 flow. Second operand 38 states and 329 transitions. [2023-11-29 00:06:27,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 857 transitions, 15345 flow [2023-11-29 00:06:27,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 857 transitions, 14424 flow, removed 242 selfloop flow, removed 24 redundant places. [2023-11-29 00:06:27,520 INFO L231 Difference]: Finished difference. Result has 295 places, 657 transitions, 12310 flow [2023-11-29 00:06:27,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5853, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=12310, PETRI_PLACES=295, PETRI_TRANSITIONS=657} [2023-11-29 00:06:27,521 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 273 predicate places. [2023-11-29 00:06:27,521 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 657 transitions, 12310 flow [2023-11-29 00:06:27,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:27,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:06:27,522 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:06:27,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-29 00:06:27,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:27,723 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:06:27,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:06:27,723 INFO L85 PathProgramCache]: Analyzing trace with hash -2000786244, now seen corresponding path program 13 times [2023-11-29 00:06:27,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:06:27,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048097785] [2023-11-29 00:06:27,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:06:27,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:06:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:06:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:27,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:06:27,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048097785] [2023-11-29 00:06:27,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048097785] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:06:27,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350798035] [2023-11-29 00:06:27,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:06:27,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:27,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:06:27,880 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:06:27,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 00:06:27,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:06:27,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:06:27,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:06:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:28,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:06:28,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:28,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350798035] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:06:28,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:06:28,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-29 00:06:28,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386699873] [2023-11-29 00:06:28,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:06:28,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 00:06:28,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:06:28,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 00:06:28,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:06:28,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:06:28,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 657 transitions, 12310 flow. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:28,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:06:28,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:06:28,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:06:30,843 INFO L124 PetriNetUnfolderBase]: 1971/3979 cut-off events. [2023-11-29 00:06:30,843 INFO L125 PetriNetUnfolderBase]: For 53812/53812 co-relation queries the response was YES. [2023-11-29 00:06:30,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33305 conditions, 3979 events. 1971/3979 cut-off events. For 53812/53812 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 29432 event pairs, 472 based on Foata normal form. 108/4087 useless extension candidates. Maximal degree in co-relation 33143. Up to 2512 conditions per place. [2023-11-29 00:06:30,908 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 548 selfloop transitions, 428 changer transitions 1/978 dead transitions. [2023-11-29 00:06:30,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 978 transitions, 20114 flow [2023-11-29 00:06:30,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 00:06:30,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-29 00:06:30,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 263 transitions. [2023-11-29 00:06:30,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36834733893557425 [2023-11-29 00:06:30,910 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 263 transitions. [2023-11-29 00:06:30,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 263 transitions. [2023-11-29 00:06:30,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:06:30,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 263 transitions. [2023-11-29 00:06:30,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 7.735294117647059) internal successors, (263), 34 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:30,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 21.0) internal successors, (735), 35 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:30,914 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 21.0) internal successors, (735), 35 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:30,914 INFO L175 Difference]: Start difference. First operand has 295 places, 657 transitions, 12310 flow. Second operand 34 states and 263 transitions. [2023-11-29 00:06:30,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 978 transitions, 20114 flow [2023-11-29 00:06:31,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 978 transitions, 19353 flow, removed 374 selfloop flow, removed 3 redundant places. [2023-11-29 00:06:31,639 INFO L231 Difference]: Finished difference. Result has 340 places, 874 transitions, 17866 flow [2023-11-29 00:06:31,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=11573, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=17866, PETRI_PLACES=340, PETRI_TRANSITIONS=874} [2023-11-29 00:06:31,640 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 318 predicate places. [2023-11-29 00:06:31,640 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 874 transitions, 17866 flow [2023-11-29 00:06:31,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:31,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:06:31,640 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:06:31,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-29 00:06:31,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:31,841 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:06:31,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:06:31,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1107126112, now seen corresponding path program 14 times [2023-11-29 00:06:31,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:06:31,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831224415] [2023-11-29 00:06:31,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:06:31,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:06:31,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:06:32,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:32,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:06:32,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831224415] [2023-11-29 00:06:32,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831224415] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:06:32,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570663841] [2023-11-29 00:06:32,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:06:32,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:32,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:06:32,044 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:06:32,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:06:32,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:06:32,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:06:32,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:06:32,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:06:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:32,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:06:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:32,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570663841] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:06:32,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:06:32,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-29 00:06:32,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733879556] [2023-11-29 00:06:32,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:06:32,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 00:06:32,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:06:32,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 00:06:32,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:06:32,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:06:32,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 874 transitions, 17866 flow. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:32,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:06:32,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:06:32,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:06:35,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:06:42,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:06:43,752 INFO L124 PetriNetUnfolderBase]: 2291/4682 cut-off events. [2023-11-29 00:06:43,752 INFO L125 PetriNetUnfolderBase]: For 83145/83145 co-relation queries the response was YES. [2023-11-29 00:06:43,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42135 conditions, 4682 events. 2291/4682 cut-off events. For 83145/83145 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 36011 event pairs, 150 based on Foata normal form. 50/4732 useless extension candidates. Maximal degree in co-relation 41957. Up to 1091 conditions per place. [2023-11-29 00:06:43,805 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 406 selfloop transitions, 760 changer transitions 23/1190 dead transitions. [2023-11-29 00:06:43,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 1190 transitions, 25663 flow [2023-11-29 00:06:43,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-29 00:06:43,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-11-29 00:06:43,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 399 transitions. [2023-11-29 00:06:43,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36538461538461536 [2023-11-29 00:06:43,808 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 399 transitions. [2023-11-29 00:06:43,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 399 transitions. [2023-11-29 00:06:43,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:06:43,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 399 transitions. [2023-11-29 00:06:43,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 7.673076923076923) internal successors, (399), 52 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:43,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 21.0) internal successors, (1113), 53 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:43,813 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 21.0) internal successors, (1113), 53 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:43,813 INFO L175 Difference]: Start difference. First operand has 340 places, 874 transitions, 17866 flow. Second operand 52 states and 399 transitions. [2023-11-29 00:06:43,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 1190 transitions, 25663 flow [2023-11-29 00:06:45,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 1190 transitions, 24882 flow, removed 349 selfloop flow, removed 6 redundant places. [2023-11-29 00:06:45,153 INFO L231 Difference]: Finished difference. Result has 399 places, 1024 transitions, 23186 flow [2023-11-29 00:06:45,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=17237, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=870, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=615, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=23186, PETRI_PLACES=399, PETRI_TRANSITIONS=1024} [2023-11-29 00:06:45,154 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 377 predicate places. [2023-11-29 00:06:45,155 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 1024 transitions, 23186 flow [2023-11-29 00:06:45,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:45,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:06:45,155 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:06:45,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 00:06:45,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:45,355 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:06:45,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:06:45,356 INFO L85 PathProgramCache]: Analyzing trace with hash -20635428, now seen corresponding path program 15 times [2023-11-29 00:06:45,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:06:45,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414062313] [2023-11-29 00:06:45,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:06:45,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:06:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:06:45,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:45,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:06:45,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414062313] [2023-11-29 00:06:45,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414062313] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:06:45,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097046294] [2023-11-29 00:06:45,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:06:45,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:45,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:06:45,554 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:06:45,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 00:06:45,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 00:06:45,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:06:45,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:06:45,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:06:45,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:45,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:06:45,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:45,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097046294] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:06:45,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:06:45,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-29 00:06:45,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289701839] [2023-11-29 00:06:45,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:06:45,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:06:45,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:06:45,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:06:45,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:06:45,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:06:45,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 1024 transitions, 23186 flow. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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) [2023-11-29 00:06:45,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:06:45,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:06:45,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:06:50,460 INFO L124 PetriNetUnfolderBase]: 2434/5060 cut-off events. [2023-11-29 00:06:50,460 INFO L125 PetriNetUnfolderBase]: For 108398/108398 co-relation queries the response was YES. [2023-11-29 00:06:50,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49092 conditions, 5060 events. 2434/5060 cut-off events. For 108398/108398 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 39989 event pairs, 311 based on Foata normal form. 48/5108 useless extension candidates. Maximal degree in co-relation 48729. Up to 1561 conditions per place. [2023-11-29 00:06:50,528 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 512 selfloop transitions, 663 changer transitions 0/1176 dead transitions. [2023-11-29 00:06:50,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 1176 transitions, 28399 flow [2023-11-29 00:06:50,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 00:06:50,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 00:06:50,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 236 transitions. [2023-11-29 00:06:50,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2023-11-29 00:06:50,530 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 236 transitions. [2023-11-29 00:06:50,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 236 transitions. [2023-11-29 00:06:50,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:06:50,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 236 transitions. [2023-11-29 00:06:50,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 8.428571428571429) internal successors, (236), 28 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:50,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 21.0) internal successors, (609), 29 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:50,532 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 21.0) internal successors, (609), 29 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:50,532 INFO L175 Difference]: Start difference. First operand has 399 places, 1024 transitions, 23186 flow. Second operand 28 states and 236 transitions. [2023-11-29 00:06:50,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 1176 transitions, 28399 flow [2023-11-29 00:06:52,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 1176 transitions, 27040 flow, removed 528 selfloop flow, removed 19 redundant places. [2023-11-29 00:06:52,361 INFO L231 Difference]: Finished difference. Result has 411 places, 1079 transitions, 25853 flow [2023-11-29 00:06:52,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=21887, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1015, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=606, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=25853, PETRI_PLACES=411, PETRI_TRANSITIONS=1079} [2023-11-29 00:06:52,362 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 389 predicate places. [2023-11-29 00:06:52,362 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 1079 transitions, 25853 flow [2023-11-29 00:06:52,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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) [2023-11-29 00:06:52,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:06:52,363 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:06:52,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 00:06:52,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 00:06:52,563 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:06:52,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:06:52,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1034585726, now seen corresponding path program 16 times [2023-11-29 00:06:52,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:06:52,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904379255] [2023-11-29 00:06:52,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:06:52,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:06:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:06:52,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:52,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:06:52,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904379255] [2023-11-29 00:06:52,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904379255] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:06:52,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248745383] [2023-11-29 00:06:52,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:06:52,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:52,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:06:52,760 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:06:52,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 00:06:52,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:06:52,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:06:52,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:06:52,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:06:52,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:52,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:06:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:06:53,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248745383] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:06:53,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:06:53,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-29 00:06:53,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750245367] [2023-11-29 00:06:53,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:06:53,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:06:53,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:06:53,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:06:53,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:06:53,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:06:53,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 1079 transitions, 25853 flow. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 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) [2023-11-29 00:06:53,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:06:53,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:06:53,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:07:00,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:07:05,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:07:08,708 INFO L124 PetriNetUnfolderBase]: 3064/6530 cut-off events. [2023-11-29 00:07:08,708 INFO L125 PetriNetUnfolderBase]: For 159566/159566 co-relation queries the response was YES. [2023-11-29 00:07:08,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65190 conditions, 6530 events. 3064/6530 cut-off events. For 159566/159566 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 55286 event pairs, 61 based on Foata normal form. 56/6586 useless extension candidates. Maximal degree in co-relation 64441. Up to 1469 conditions per place. [2023-11-29 00:07:08,838 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 635 selfloop transitions, 936 changer transitions 30/1602 dead transitions. [2023-11-29 00:07:08,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 1602 transitions, 40108 flow [2023-11-29 00:07:08,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-29 00:07:08,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-29 00:07:08,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 411 transitions. [2023-11-29 00:07:08,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39941690962099125 [2023-11-29 00:07:08,840 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 411 transitions. [2023-11-29 00:07:08,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 411 transitions. [2023-11-29 00:07:08,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:07:08,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 411 transitions. [2023-11-29 00:07:08,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 8.387755102040817) internal successors, (411), 49 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:07:08,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 21.0) internal successors, (1050), 50 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:07:08,843 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 21.0) internal successors, (1050), 50 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:07:08,843 INFO L175 Difference]: Start difference. First operand has 411 places, 1079 transitions, 25853 flow. Second operand 49 states and 411 transitions. [2023-11-29 00:07:08,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 1602 transitions, 40108 flow [2023-11-29 00:07:11,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 1602 transitions, 39365 flow, removed 237 selfloop flow, removed 16 redundant places. [2023-11-29 00:07:11,500 INFO L231 Difference]: Finished difference. Result has 459 places, 1314 transitions, 34576 flow [2023-11-29 00:07:11,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=25143, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1072, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=695, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=34576, PETRI_PLACES=459, PETRI_TRANSITIONS=1314} [2023-11-29 00:07:11,501 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 437 predicate places. [2023-11-29 00:07:11,501 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 1314 transitions, 34576 flow [2023-11-29 00:07:11,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 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) [2023-11-29 00:07:11,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:07:11,502 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:07:11,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 00:07:11,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 00:07:11,702 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:07:11,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:11,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1120271520, now seen corresponding path program 17 times [2023-11-29 00:07:11,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:11,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797479865] [2023-11-29 00:07:11,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:11,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:11,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:07:11,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:11,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797479865] [2023-11-29 00:07:11,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797479865] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:07:11,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288073316] [2023-11-29 00:07:11,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:07:11,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:11,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:11,951 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:11,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 00:07:12,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 00:07:12,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:07:12,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:07:12,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:07:12,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:12,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:07:12,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288073316] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:07:12,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:07:12,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-29 00:07:12,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430960] [2023-11-29 00:07:12,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:07:12,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:07:12,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:12,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:07:12,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:07:12,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:07:12,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 1314 transitions, 34576 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:07:12,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:07:12,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:07:12,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:07:18,050 INFO L124 PetriNetUnfolderBase]: 3348/6938 cut-off events. [2023-11-29 00:07:18,050 INFO L125 PetriNetUnfolderBase]: For 186323/186323 co-relation queries the response was YES. [2023-11-29 00:07:18,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76010 conditions, 6938 events. 3348/6938 cut-off events. For 186323/186323 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 57882 event pairs, 89 based on Foata normal form. 104/7042 useless extension candidates. Maximal degree in co-relation 75167. Up to 3656 conditions per place. [2023-11-29 00:07:18,142 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1214 selfloop transitions, 457 changer transitions 2/1674 dead transitions. [2023-11-29 00:07:18,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 1674 transitions, 47015 flow [2023-11-29 00:07:18,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 00:07:18,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-29 00:07:18,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 252 transitions. [2023-11-29 00:07:18,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2023-11-29 00:07:18,143 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 252 transitions. [2023-11-29 00:07:18,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 252 transitions. [2023-11-29 00:07:18,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:07:18,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 252 transitions. [2023-11-29 00:07:18,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 7.875) internal successors, (252), 32 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:07:18,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 21.0) internal successors, (693), 33 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:07:18,146 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 21.0) internal successors, (693), 33 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:07:18,146 INFO L175 Difference]: Start difference. First operand has 459 places, 1314 transitions, 34576 flow. Second operand 32 states and 252 transitions. [2023-11-29 00:07:18,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 1674 transitions, 47015 flow [2023-11-29 00:07:22,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 1674 transitions, 45047 flow, removed 762 selfloop flow, removed 17 redundant places. [2023-11-29 00:07:22,178 INFO L231 Difference]: Finished difference. Result has 487 places, 1505 transitions, 40128 flow [2023-11-29 00:07:22,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=32825, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=913, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=40128, PETRI_PLACES=487, PETRI_TRANSITIONS=1505} [2023-11-29 00:07:22,180 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 465 predicate places. [2023-11-29 00:07:22,180 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 1505 transitions, 40128 flow [2023-11-29 00:07:22,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:07:22,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:07:22,180 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:07:22,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 00:07:22,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 00:07:22,381 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:07:22,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:22,381 INFO L85 PathProgramCache]: Analyzing trace with hash 402732704, now seen corresponding path program 18 times [2023-11-29 00:07:22,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:22,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544351297] [2023-11-29 00:07:22,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:22,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:22,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:07:22,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:22,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544351297] [2023-11-29 00:07:22,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544351297] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:07:22,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331460126] [2023-11-29 00:07:22,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:07:22,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:22,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:22,581 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:22,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 00:07:22,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 00:07:22,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:07:22,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:07:22,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:07:22,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:07:22,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331460126] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:07:22,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:07:22,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-29 00:07:22,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131870358] [2023-11-29 00:07:22,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:07:22,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 00:07:22,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:22,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 00:07:22,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:07:22,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:07:22,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 1505 transitions, 40128 flow. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:07:22,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:07:22,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:07:22,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:07:29,559 INFO L124 PetriNetUnfolderBase]: 3596/7720 cut-off events. [2023-11-29 00:07:29,559 INFO L125 PetriNetUnfolderBase]: For 249342/249342 co-relation queries the response was YES. [2023-11-29 00:07:29,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85818 conditions, 7720 events. 3596/7720 cut-off events. For 249342/249342 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 67449 event pairs, 91 based on Foata normal form. 28/7748 useless extension candidates. Maximal degree in co-relation 84933. Up to 2309 conditions per place. [2023-11-29 00:07:29,684 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 1021 selfloop transitions, 786 changer transitions 9/1817 dead transitions. [2023-11-29 00:07:29,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 1817 transitions, 50573 flow [2023-11-29 00:07:29,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 00:07:29,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-29 00:07:29,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 306 transitions. [2023-11-29 00:07:29,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-11-29 00:07:29,686 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 306 transitions. [2023-11-29 00:07:29,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 306 transitions. [2023-11-29 00:07:29,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:07:29,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 306 transitions. [2023-11-29 00:07:29,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 9.0) internal successors, (306), 34 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:07:29,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 21.0) internal successors, (735), 35 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:07:29,689 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 21.0) internal successors, (735), 35 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:07:29,689 INFO L175 Difference]: Start difference. First operand has 487 places, 1505 transitions, 40128 flow. Second operand 34 states and 306 transitions. [2023-11-29 00:07:29,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 1817 transitions, 50573 flow [2023-11-29 00:07:35,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 1817 transitions, 49652 flow, removed 289 selfloop flow, removed 10 redundant places. [2023-11-29 00:07:35,449 INFO L231 Difference]: Finished difference. Result has 522 places, 1625 transitions, 45698 flow [2023-11-29 00:07:35,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=39244, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=679, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=795, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=45698, PETRI_PLACES=522, PETRI_TRANSITIONS=1625} [2023-11-29 00:07:35,450 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 500 predicate places. [2023-11-29 00:07:35,451 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 1625 transitions, 45698 flow [2023-11-29 00:07:35,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:07:35,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:07:35,451 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:07:35,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 00:07:35,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 00:07:35,651 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:07:35,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:35,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1657216130, now seen corresponding path program 19 times [2023-11-29 00:07:35,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:35,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733961468] [2023-11-29 00:07:35,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:35,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:07:35,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:35,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733961468] [2023-11-29 00:07:35,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733961468] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:07:35,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616485599] [2023-11-29 00:07:35,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:07:35,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:35,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:35,843 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:35,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 00:07:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:35,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:07:35,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:36,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:07:36,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:36,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:07:36,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616485599] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:07:36,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:07:36,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-11-29 00:07:36,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616003235] [2023-11-29 00:07:36,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:07:36,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:07:36,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:36,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:07:36,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:07:36,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:07:36,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 1625 transitions, 45698 flow. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:07:36,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:07:36,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:07:36,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:07:42,899 INFO L124 PetriNetUnfolderBase]: 3954/8302 cut-off events. [2023-11-29 00:07:42,899 INFO L125 PetriNetUnfolderBase]: For 292749/292749 co-relation queries the response was YES. [2023-11-29 00:07:42,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97771 conditions, 8302 events. 3954/8302 cut-off events. For 292749/292749 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 72216 event pairs, 109 based on Foata normal form. 20/8322 useless extension candidates. Maximal degree in co-relation 97257. Up to 4986 conditions per place. [2023-11-29 00:07:43,049 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 1534 selfloop transitions, 372 changer transitions 2/1909 dead transitions. [2023-11-29 00:07:43,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 1909 transitions, 58061 flow [2023-11-29 00:07:43,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 00:07:43,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 00:07:43,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 126 transitions. [2023-11-29 00:07:43,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-11-29 00:07:43,051 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 126 transitions. [2023-11-29 00:07:43,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 126 transitions. [2023-11-29 00:07:43,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:07:43,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 126 transitions. [2023-11-29 00:07:43,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 9.0) internal successors, (126), 14 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) [2023-11-29 00:07:43,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 21.0) internal successors, (315), 15 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:07:43,052 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 21.0) internal successors, (315), 15 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:07:43,052 INFO L175 Difference]: Start difference. First operand has 522 places, 1625 transitions, 45698 flow. Second operand 14 states and 126 transitions. [2023-11-29 00:07:43,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 1909 transitions, 58061 flow [2023-11-29 00:07:49,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 1909 transitions, 57096 flow, removed 232 selfloop flow, removed 16 redundant places. [2023-11-29 00:07:49,809 INFO L231 Difference]: Finished difference. Result has 523 places, 1768 transitions, 51443 flow [2023-11-29 00:07:49,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=44741, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=51443, PETRI_PLACES=523, PETRI_TRANSITIONS=1768} [2023-11-29 00:07:49,811 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 501 predicate places. [2023-11-29 00:07:49,811 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 1768 transitions, 51443 flow [2023-11-29 00:07:49,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:07:49,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:07:49,811 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:07:49,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 00:07:50,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 00:07:50,012 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:07:50,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:50,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1258953370, now seen corresponding path program 20 times [2023-11-29 00:07:50,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:50,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039906295] [2023-11-29 00:07:50,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:50,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:50,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:07:50,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:50,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039906295] [2023-11-29 00:07:50,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039906295] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:07:50,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535393786] [2023-11-29 00:07:50,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:07:50,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:50,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:50,207 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:50,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 00:07:50,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:07:50,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:07:50,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:07:50,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:07:50,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:50,514 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:07:50,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535393786] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:07:50,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:07:50,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-29 00:07:50,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566433277] [2023-11-29 00:07:50,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:07:50,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:07:50,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:50,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:07:50,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:07:50,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:07:50,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 1768 transitions, 51443 flow. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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) [2023-11-29 00:07:50,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:07:50,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:07:50,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:07:58,877 INFO L124 PetriNetUnfolderBase]: 4121/8615 cut-off events. [2023-11-29 00:07:58,878 INFO L125 PetriNetUnfolderBase]: For 300153/300153 co-relation queries the response was YES. [2023-11-29 00:07:58,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101427 conditions, 8615 events. 4121/8615 cut-off events. For 300153/300153 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 75415 event pairs, 50 based on Foata normal form. 34/8649 useless extension candidates. Maximal degree in co-relation 101211. Up to 2925 conditions per place. [2023-11-29 00:07:59,018 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 948 selfloop transitions, 965 changer transitions 1/1915 dead transitions. [2023-11-29 00:07:59,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 1915 transitions, 57880 flow [2023-11-29 00:07:59,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-29 00:07:59,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-29 00:07:59,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 271 transitions. [2023-11-29 00:07:59,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39105339105339104 [2023-11-29 00:07:59,019 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 271 transitions. [2023-11-29 00:07:59,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 271 transitions. [2023-11-29 00:07:59,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:07:59,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 271 transitions. [2023-11-29 00:07:59,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 8.212121212121213) internal successors, (271), 33 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:07:59,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 21.0) internal successors, (714), 34 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:07:59,022 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 21.0) internal successors, (714), 34 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:07:59,022 INFO L175 Difference]: Start difference. First operand has 523 places, 1768 transitions, 51443 flow. Second operand 33 states and 271 transitions. [2023-11-29 00:07:59,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 1915 transitions, 57880 flow [2023-11-29 00:08:06,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 1915 transitions, 57055 flow, removed 19 selfloop flow, removed 19 redundant places. [2023-11-29 00:08:06,645 INFO L231 Difference]: Finished difference. Result has 545 places, 1835 transitions, 54587 flow [2023-11-29 00:08:06,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=50607, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=908, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=838, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=54587, PETRI_PLACES=545, PETRI_TRANSITIONS=1835} [2023-11-29 00:08:06,647 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 523 predicate places. [2023-11-29 00:08:06,647 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 1835 transitions, 54587 flow [2023-11-29 00:08:06,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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) [2023-11-29 00:08:06,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:08:06,647 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:08:06,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 00:08:06,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 00:08:06,848 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:08:06,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:08:06,848 INFO L85 PathProgramCache]: Analyzing trace with hash 998772572, now seen corresponding path program 21 times [2023-11-29 00:08:06,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:08:06,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729091921] [2023-11-29 00:08:06,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:06,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:08:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:07,016 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:08:07,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:08:07,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729091921] [2023-11-29 00:08:07,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729091921] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:08:07,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742644392] [2023-11-29 00:08:07,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:08:07,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:08:07,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:08:07,017 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:08:07,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 00:08:07,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 00:08:07,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:08:07,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:08:07,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:08:07,238 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:08:07,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:08:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:08:07,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742644392] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:08:07,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:08:07,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-29 00:08:07,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704147942] [2023-11-29 00:08:07,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:08:07,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 00:08:07,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:08:07,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 00:08:07,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:08:07,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:08:07,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 1835 transitions, 54587 flow. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 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) [2023-11-29 00:08:07,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:08:07,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:08:07,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:08:14,760 INFO L124 PetriNetUnfolderBase]: 4142/8660 cut-off events. [2023-11-29 00:08:14,760 INFO L125 PetriNetUnfolderBase]: For 331087/331087 co-relation queries the response was YES. [2023-11-29 00:08:14,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104171 conditions, 8660 events. 4142/8660 cut-off events. For 331087/331087 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 75846 event pairs, 102 based on Foata normal form. 12/8672 useless extension candidates. Maximal degree in co-relation 103437. Up to 5100 conditions per place. [2023-11-29 00:08:14,890 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1001 selfloop transitions, 876 changer transitions 1/1879 dead transitions. [2023-11-29 00:08:14,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 1879 transitions, 58979 flow [2023-11-29 00:08:14,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 00:08:14,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 00:08:14,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 133 transitions. [2023-11-29 00:08:14,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2023-11-29 00:08:14,891 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 133 transitions. [2023-11-29 00:08:14,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 133 transitions. [2023-11-29 00:08:14,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:08:14,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 133 transitions. [2023-11-29 00:08:14,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 8.866666666666667) internal successors, (133), 15 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) [2023-11-29 00:08:14,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 21.0) internal successors, (336), 16 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:14,892 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 21.0) internal successors, (336), 16 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:14,892 INFO L175 Difference]: Start difference. First operand has 545 places, 1835 transitions, 54587 flow. Second operand 15 states and 133 transitions. [2023-11-29 00:08:14,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 1879 transitions, 58979 flow [2023-11-29 00:08:22,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 1879 transitions, 56983 flow, removed 402 selfloop flow, removed 16 redundant places. [2023-11-29 00:08:22,872 INFO L231 Difference]: Finished difference. Result has 546 places, 1843 transitions, 54666 flow [2023-11-29 00:08:22,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=52713, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1835, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=870, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=961, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=54666, PETRI_PLACES=546, PETRI_TRANSITIONS=1843} [2023-11-29 00:08:22,874 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 524 predicate places. [2023-11-29 00:08:22,874 INFO L495 AbstractCegarLoop]: Abstraction has has 546 places, 1843 transitions, 54666 flow [2023-11-29 00:08:22,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 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) [2023-11-29 00:08:22,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:08:22,874 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:08:22,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-29 00:08:23,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:08:23,075 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:08:23,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:08:23,075 INFO L85 PathProgramCache]: Analyzing trace with hash -248458224, now seen corresponding path program 22 times [2023-11-29 00:08:23,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:08:23,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026035546] [2023-11-29 00:08:23,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:23,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:08:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:23,312 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:08:23,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:08:23,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026035546] [2023-11-29 00:08:23,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026035546] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:08:23,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601819102] [2023-11-29 00:08:23,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:08:23,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:08:23,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:08:23,313 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:08:23,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 00:08:23,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:08:23,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:08:23,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:08:23,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:08:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:08:23,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:08:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:08:23,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601819102] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:08:23,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:08:23,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-29 00:08:23,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271174648] [2023-11-29 00:08:23,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:08:23,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 00:08:23,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:08:23,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 00:08:23,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:08:23,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:08:23,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 1843 transitions, 54666 flow. Second operand has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:23,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:08:23,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:08:23,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:08:37,435 INFO L124 PetriNetUnfolderBase]: 4379/9237 cut-off events. [2023-11-29 00:08:37,436 INFO L125 PetriNetUnfolderBase]: For 359379/359379 co-relation queries the response was YES. [2023-11-29 00:08:37,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110022 conditions, 9237 events. 4379/9237 cut-off events. For 359379/359379 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 82329 event pairs, 64 based on Foata normal form. 46/9283 useless extension candidates. Maximal degree in co-relation 109203. Up to 4585 conditions per place. [2023-11-29 00:08:37,616 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 1338 selfloop transitions, 662 changer transitions 5/2006 dead transitions. [2023-11-29 00:08:37,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 2006 transitions, 62182 flow [2023-11-29 00:08:37,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 00:08:37,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-29 00:08:37,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 238 transitions. [2023-11-29 00:08:37,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41975308641975306 [2023-11-29 00:08:37,618 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 238 transitions. [2023-11-29 00:08:37,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 238 transitions. [2023-11-29 00:08:37,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:08:37,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 238 transitions. [2023-11-29 00:08:37,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 8.814814814814815) internal successors, (238), 27 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:37,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 21.0) internal successors, (588), 28 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:37,620 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 21.0) internal successors, (588), 28 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:37,620 INFO L175 Difference]: Start difference. First operand has 546 places, 1843 transitions, 54666 flow. Second operand 27 states and 238 transitions. [2023-11-29 00:08:37,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 2006 transitions, 62182 flow [2023-11-29 00:08:46,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 2006 transitions, 60131 flow, removed 23 selfloop flow, removed 11 redundant places. [2023-11-29 00:08:46,262 INFO L231 Difference]: Finished difference. Result has 566 places, 1910 transitions, 56452 flow [2023-11-29 00:08:46,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=52471, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=598, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=56452, PETRI_PLACES=566, PETRI_TRANSITIONS=1910} [2023-11-29 00:08:46,264 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 544 predicate places. [2023-11-29 00:08:46,264 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 1910 transitions, 56452 flow [2023-11-29 00:08:46,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:46,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:08:46,264 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:08:46,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 00:08:46,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-29 00:08:46,465 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:08:46,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:08:46,465 INFO L85 PathProgramCache]: Analyzing trace with hash 555873432, now seen corresponding path program 23 times [2023-11-29 00:08:46,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:08:46,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406703104] [2023-11-29 00:08:46,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:46,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:08:46,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:08:46,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:08:46,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406703104] [2023-11-29 00:08:46,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406703104] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:08:46,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024827755] [2023-11-29 00:08:46,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:08:46,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:08:46,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:08:46,617 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:08:46,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 00:08:46,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 00:08:46,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:08:46,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:08:46,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:08:46,783 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:08:46,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:08:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:08:46,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024827755] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:08:46,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:08:46,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-11-29 00:08:46,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977824959] [2023-11-29 00:08:46,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:08:46,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:08:46,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:08:46,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:08:46,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:08:46,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:08:46,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 1910 transitions, 56452 flow. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:46,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:08:46,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:08:46,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:08:55,417 INFO L124 PetriNetUnfolderBase]: 4464/9378 cut-off events. [2023-11-29 00:08:55,417 INFO L125 PetriNetUnfolderBase]: For 378245/378245 co-relation queries the response was YES. [2023-11-29 00:08:55,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113659 conditions, 9378 events. 4464/9378 cut-off events. For 378245/378245 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 83330 event pairs, 142 based on Foata normal form. 12/9390 useless extension candidates. Maximal degree in co-relation 112818. Up to 7405 conditions per place. [2023-11-29 00:08:55,599 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1502 selfloop transitions, 493 changer transitions 1/1997 dead transitions. [2023-11-29 00:08:55,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 1997 transitions, 61976 flow [2023-11-29 00:08:55,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 00:08:55,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 00:08:55,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 163 transitions. [2023-11-29 00:08:55,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40852130325814534 [2023-11-29 00:08:55,601 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 163 transitions. [2023-11-29 00:08:55,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 163 transitions. [2023-11-29 00:08:55,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:08:55,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 163 transitions. [2023-11-29 00:08:55,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 8.578947368421053) internal successors, (163), 19 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:55,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 21.0) internal successors, (420), 20 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:55,603 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 21.0) internal successors, (420), 20 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:55,603 INFO L175 Difference]: Start difference. First operand has 566 places, 1910 transitions, 56452 flow. Second operand 19 states and 163 transitions. [2023-11-29 00:08:55,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 1997 transitions, 61976 flow [2023-11-29 00:09:05,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 1997 transitions, 60529 flow, removed 591 selfloop flow, removed 13 redundant places. [2023-11-29 00:09:05,909 INFO L231 Difference]: Finished difference. Result has 579 places, 1941 transitions, 57386 flow [2023-11-29 00:09:05,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=55159, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1910, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=462, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=57386, PETRI_PLACES=579, PETRI_TRANSITIONS=1941} [2023-11-29 00:09:05,911 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 557 predicate places. [2023-11-29 00:09:05,911 INFO L495 AbstractCegarLoop]: Abstraction has has 579 places, 1941 transitions, 57386 flow [2023-11-29 00:09:05,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:05,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:09:05,912 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:09:05,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-29 00:09:06,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 00:09:06,112 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:09:06,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:09:06,113 INFO L85 PathProgramCache]: Analyzing trace with hash 439415772, now seen corresponding path program 24 times [2023-11-29 00:09:06,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:09:06,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595395379] [2023-11-29 00:09:06,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:09:06,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:09:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:09:06,285 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:09:06,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:09:06,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595395379] [2023-11-29 00:09:06,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595395379] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:09:06,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855024874] [2023-11-29 00:09:06,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:09:06,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:09:06,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:09:06,287 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:09:06,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 00:09:06,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 00:09:06,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:09:06,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:09:06,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:09:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:09:06,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:09:06,675 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:09:06,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855024874] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:09:06,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:09:06,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2023-11-29 00:09:06,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017936772] [2023-11-29 00:09:06,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:09:06,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 00:09:06,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:09:06,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 00:09:06,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:09:06,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:09:06,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 1941 transitions, 57386 flow. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:06,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:09:06,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:09:06,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:09:18,191 INFO L124 PetriNetUnfolderBase]: 4652/9711 cut-off events. [2023-11-29 00:09:18,191 INFO L125 PetriNetUnfolderBase]: For 389898/389898 co-relation queries the response was YES. [2023-11-29 00:09:18,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116675 conditions, 9711 events. 4652/9711 cut-off events. For 389898/389898 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 86595 event pairs, 1718 based on Foata normal form. 38/9749 useless extension candidates. Maximal degree in co-relation 115886. Up to 8595 conditions per place. [2023-11-29 00:09:18,408 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1843 selfloop transitions, 250 changer transitions 0/2094 dead transitions. [2023-11-29 00:09:18,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 2094 transitions, 64597 flow [2023-11-29 00:09:18,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 00:09:18,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-29 00:09:18,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 229 transitions. [2023-11-29 00:09:18,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4194139194139194 [2023-11-29 00:09:18,409 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 229 transitions. [2023-11-29 00:09:18,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 229 transitions. [2023-11-29 00:09:18,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:09:18,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 229 transitions. [2023-11-29 00:09:18,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 8.807692307692308) internal successors, (229), 26 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:18,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 21.0) internal successors, (567), 27 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:18,412 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 21.0) internal successors, (567), 27 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:18,412 INFO L175 Difference]: Start difference. First operand has 579 places, 1941 transitions, 57386 flow. Second operand 26 states and 229 transitions. [2023-11-29 00:09:18,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 2094 transitions, 64597 flow [2023-11-29 00:09:28,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 2094 transitions, 63956 flow, removed 32 selfloop flow, removed 10 redundant places. [2023-11-29 00:09:28,365 INFO L231 Difference]: Finished difference. Result has 608 places, 1995 transitions, 59126 flow [2023-11-29 00:09:28,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=56620, PETRI_DIFFERENCE_MINUEND_PLACES=569, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1934, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1702, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=59126, PETRI_PLACES=608, PETRI_TRANSITIONS=1995} [2023-11-29 00:09:28,367 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 586 predicate places. [2023-11-29 00:09:28,367 INFO L495 AbstractCegarLoop]: Abstraction has has 608 places, 1995 transitions, 59126 flow [2023-11-29 00:09:28,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:28,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:09:28,368 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:09:28,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 00:09:28,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 00:09:28,568 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:09:28,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:09:28,569 INFO L85 PathProgramCache]: Analyzing trace with hash -982290306, now seen corresponding path program 25 times [2023-11-29 00:09:28,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:09:28,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791590126] [2023-11-29 00:09:28,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:09:28,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:09:28,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:09:28,713 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:09:28,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:09:28,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791590126] [2023-11-29 00:09:28,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791590126] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:09:28,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209596592] [2023-11-29 00:09:28,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:09:28,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:09:28,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:09:28,715 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:09:28,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 00:09:28,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:09:28,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:09:28,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:09:28,880 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:09:28,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:09:29,029 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:09:29,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209596592] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:09:29,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:09:29,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-11-29 00:09:29,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921634081] [2023-11-29 00:09:29,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:09:29,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:09:29,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:09:29,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:09:29,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:09:29,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:09:29,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 608 places, 1995 transitions, 59126 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:29,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:09:29,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:09:29,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:09:40,375 INFO L124 PetriNetUnfolderBase]: 4879/10261 cut-off events. [2023-11-29 00:09:40,375 INFO L125 PetriNetUnfolderBase]: For 420978/420978 co-relation queries the response was YES. [2023-11-29 00:09:40,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122167 conditions, 10261 events. 4879/10261 cut-off events. For 420978/420978 co-relation queries the response was YES. Maximal size of possible extension queue 758. Compared 92927 event pairs, 1253 based on Foata normal form. 14/10275 useless extension candidates. Maximal degree in co-relation 121228. Up to 5601 conditions per place. [2023-11-29 00:09:40,579 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1668 selfloop transitions, 477 changer transitions 4/2150 dead transitions. [2023-11-29 00:09:40,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 628 places, 2150 transitions, 66556 flow [2023-11-29 00:09:40,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 00:09:40,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 00:09:40,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 173 transitions. [2023-11-29 00:09:40,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3922902494331066 [2023-11-29 00:09:40,581 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 173 transitions. [2023-11-29 00:09:40,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 173 transitions. [2023-11-29 00:09:40,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:09:40,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 173 transitions. [2023-11-29 00:09:40,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 8.238095238095237) internal successors, (173), 21 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) [2023-11-29 00:09:40,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 21.0) internal successors, (462), 22 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:40,582 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 21.0) internal successors, (462), 22 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:40,582 INFO L175 Difference]: Start difference. First operand has 608 places, 1995 transitions, 59126 flow. Second operand 21 states and 173 transitions. [2023-11-29 00:09:40,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 628 places, 2150 transitions, 66556 flow [2023-11-29 00:09:49,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 620 places, 2150 transitions, 66164 flow, removed 151 selfloop flow, removed 8 redundant places. [2023-11-29 00:09:49,533 INFO L231 Difference]: Finished difference. Result has 626 places, 2068 transitions, 61930 flow [2023-11-29 00:09:49,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=58717, PETRI_DIFFERENCE_MINUEND_PLACES=600, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1994, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=402, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=61930, PETRI_PLACES=626, PETRI_TRANSITIONS=2068} [2023-11-29 00:09:49,534 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 604 predicate places. [2023-11-29 00:09:49,535 INFO L495 AbstractCegarLoop]: Abstraction has has 626 places, 2068 transitions, 61930 flow [2023-11-29 00:09:49,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:49,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:09:49,535 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:09:49,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 00:09:49,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:09:49,735 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:09:49,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:09:49,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1303564316, now seen corresponding path program 26 times [2023-11-29 00:09:49,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:09:49,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390024880] [2023-11-29 00:09:49,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:09:49,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:09:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:09:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:09:49,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:09:49,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390024880] [2023-11-29 00:09:49,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390024880] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:09:49,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401154912] [2023-11-29 00:09:49,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:09:49,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:09:49,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:09:49,872 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:09:49,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 00:09:49,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:09:49,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:09:49,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:09:49,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:09:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:09:50,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:09:50,217 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:09:50,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401154912] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:09:50,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:09:50,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-11-29 00:09:50,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670114731] [2023-11-29 00:09:50,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:09:50,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:09:50,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:09:50,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:09:50,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:09:50,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:09:50,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 626 places, 2068 transitions, 61930 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 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) [2023-11-29 00:09:50,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:09:50,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:09:50,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:10:01,071 INFO L124 PetriNetUnfolderBase]: 4921/10345 cut-off events. [2023-11-29 00:10:01,071 INFO L125 PetriNetUnfolderBase]: For 446951/446951 co-relation queries the response was YES. [2023-11-29 00:10:01,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126013 conditions, 10345 events. 4921/10345 cut-off events. For 446951/446951 co-relation queries the response was YES. Maximal size of possible extension queue 765. Compared 93838 event pairs, 1386 based on Foata normal form. 6/10351 useless extension candidates. Maximal degree in co-relation 124850. Up to 5836 conditions per place. [2023-11-29 00:10:01,234 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1792 selfloop transitions, 340 changer transitions 7/2140 dead transitions. [2023-11-29 00:10:01,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 2140 transitions, 67742 flow [2023-11-29 00:10:01,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 00:10:01,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 00:10:01,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 148 transitions. [2023-11-29 00:10:01,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37092731829573933 [2023-11-29 00:10:01,236 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 148 transitions. [2023-11-29 00:10:01,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 148 transitions. [2023-11-29 00:10:01,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:10:01,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 148 transitions. [2023-11-29 00:10:01,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 7.7894736842105265) internal successors, (148), 19 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:10:01,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 21.0) internal successors, (420), 20 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:10:01,237 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 21.0) internal successors, (420), 20 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:10:01,237 INFO L175 Difference]: Start difference. First operand has 626 places, 2068 transitions, 61930 flow. Second operand 19 states and 148 transitions. [2023-11-29 00:10:01,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 2140 transitions, 67742 flow [2023-11-29 00:10:10,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 636 places, 2140 transitions, 67592 flow, removed 28 selfloop flow, removed 7 redundant places. [2023-11-29 00:10:10,346 INFO L231 Difference]: Finished difference. Result has 641 places, 2076 transitions, 63084 flow [2023-11-29 00:10:10,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=61688, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2064, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=324, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1730, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=63084, PETRI_PLACES=641, PETRI_TRANSITIONS=2076} [2023-11-29 00:10:10,347 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 619 predicate places. [2023-11-29 00:10:10,348 INFO L495 AbstractCegarLoop]: Abstraction has has 641 places, 2076 transitions, 63084 flow [2023-11-29 00:10:10,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 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) [2023-11-29 00:10:10,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:10:10,348 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:10:10,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 00:10:10,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:10:10,548 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:10:10,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:10:10,549 INFO L85 PathProgramCache]: Analyzing trace with hash -59849500, now seen corresponding path program 27 times [2023-11-29 00:10:10,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:10:10,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761861682] [2023-11-29 00:10:10,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:10:10,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:10:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:10:10,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:10:10,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:10:10,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761861682] [2023-11-29 00:10:10,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761861682] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:10:10,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207135024] [2023-11-29 00:10:10,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:10:10,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:10:10,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:10:10,756 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:10:10,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 00:10:11,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 00:10:11,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:10:11,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:10:11,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:10:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:10:11,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:10:11,220 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:10:11,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207135024] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:10:11,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:10:11,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-29 00:10:11,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336597523] [2023-11-29 00:10:11,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:10:11,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:10:11,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:10:11,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:10:11,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:10:11,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:10:11,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 641 places, 2076 transitions, 63084 flow. Second operand has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:10:11,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:10:11,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:10:11,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:10:22,467 INFO L124 PetriNetUnfolderBase]: 4934/10377 cut-off events. [2023-11-29 00:10:22,467 INFO L125 PetriNetUnfolderBase]: For 485264/485264 co-relation queries the response was YES. [2023-11-29 00:10:22,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129120 conditions, 10377 events. 4934/10377 cut-off events. For 485264/485264 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 94360 event pairs, 1389 based on Foata normal form. 20/10397 useless extension candidates. Maximal degree in co-relation 128512. Up to 6669 conditions per place. [2023-11-29 00:10:22,646 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 1729 selfloop transitions, 434 changer transitions 0/2164 dead transitions. [2023-11-29 00:10:22,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 661 places, 2164 transitions, 69082 flow [2023-11-29 00:10:22,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 00:10:22,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-29 00:10:22,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 205 transitions. [2023-11-29 00:10:22,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40674603174603174 [2023-11-29 00:10:22,647 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 205 transitions. [2023-11-29 00:10:22,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 205 transitions. [2023-11-29 00:10:22,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:10:22,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 205 transitions. [2023-11-29 00:10:22,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 8.541666666666666) internal successors, (205), 24 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) [2023-11-29 00:10:22,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 21.0) internal successors, (525), 25 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:10:22,649 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 21.0) internal successors, (525), 25 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:10:22,649 INFO L175 Difference]: Start difference. First operand has 641 places, 2076 transitions, 63084 flow. Second operand 24 states and 205 transitions. [2023-11-29 00:10:22,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 661 places, 2164 transitions, 69082 flow [2023-11-29 00:10:31,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 654 places, 2164 transitions, 68833 flow, removed 41 selfloop flow, removed 7 redundant places. [2023-11-29 00:10:32,006 INFO L231 Difference]: Finished difference. Result has 660 places, 2095 transitions, 64708 flow [2023-11-29 00:10:32,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=62753, PETRI_DIFFERENCE_MINUEND_PLACES=631, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2072, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=414, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=64708, PETRI_PLACES=660, PETRI_TRANSITIONS=2095} [2023-11-29 00:10:32,008 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 638 predicate places. [2023-11-29 00:10:32,008 INFO L495 AbstractCegarLoop]: Abstraction has has 660 places, 2095 transitions, 64708 flow [2023-11-29 00:10:32,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:10:32,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:10:32,008 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:10:32,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 00:10:32,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-29 00:10:32,209 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:10:32,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:10:32,209 INFO L85 PathProgramCache]: Analyzing trace with hash 341419228, now seen corresponding path program 28 times [2023-11-29 00:10:32,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:10:32,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609302693] [2023-11-29 00:10:32,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:10:32,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:10:32,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:10:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:10:32,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:10:32,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609302693] [2023-11-29 00:10:32,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609302693] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:10:32,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691916435] [2023-11-29 00:10:32,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:10:32,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:10:32,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:10:32,394 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:10:32,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 00:10:32,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:10:32,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:10:32,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:10:32,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:10:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:10:32,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:10:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:10:32,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691916435] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:10:32,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:10:32,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-11-29 00:10:32,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699015630] [2023-11-29 00:10:32,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:10:32,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:10:32,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:10:32,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:10:32,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:10:32,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:10:32,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 660 places, 2095 transitions, 64708 flow. Second operand has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 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) [2023-11-29 00:10:32,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:10:32,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:10:32,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:10:43,134 INFO L124 PetriNetUnfolderBase]: 5072/10639 cut-off events. [2023-11-29 00:10:43,134 INFO L125 PetriNetUnfolderBase]: For 524849/524849 co-relation queries the response was YES. [2023-11-29 00:10:43,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134324 conditions, 10639 events. 5072/10639 cut-off events. For 524849/524849 co-relation queries the response was YES. Maximal size of possible extension queue 795. Compared 96789 event pairs, 1994 based on Foata normal form. 46/10685 useless extension candidates. Maximal degree in co-relation 133725. Up to 9814 conditions per place. [2023-11-29 00:10:43,375 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 2050 selfloop transitions, 179 changer transitions 0/2230 dead transitions. [2023-11-29 00:10:43,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 688 places, 2230 transitions, 72214 flow [2023-11-29 00:10:43,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 00:10:43,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-29 00:10:43,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 248 transitions. [2023-11-29 00:10:43,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4072249589490969 [2023-11-29 00:10:43,377 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 248 transitions. [2023-11-29 00:10:43,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 248 transitions. [2023-11-29 00:10:43,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:10:43,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 248 transitions. [2023-11-29 00:10:43,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 8.551724137931034) internal successors, (248), 29 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:10:43,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 21.0) internal successors, (630), 30 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:10:43,379 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 21.0) internal successors, (630), 30 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:10:43,379 INFO L175 Difference]: Start difference. First operand has 660 places, 2095 transitions, 64708 flow. Second operand 29 states and 248 transitions. [2023-11-29 00:10:43,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 688 places, 2230 transitions, 72214 flow [2023-11-29 00:10:53,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 676 places, 2230 transitions, 71641 flow, removed 229 selfloop flow, removed 12 redundant places. [2023-11-29 00:10:53,888 INFO L231 Difference]: Finished difference. Result has 691 places, 2144 transitions, 66549 flow [2023-11-29 00:10:53,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=64093, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2093, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1934, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=66549, PETRI_PLACES=691, PETRI_TRANSITIONS=2144} [2023-11-29 00:10:53,890 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 669 predicate places. [2023-11-29 00:10:53,890 INFO L495 AbstractCegarLoop]: Abstraction has has 691 places, 2144 transitions, 66549 flow [2023-11-29 00:10:53,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 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) [2023-11-29 00:10:53,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:10:53,891 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:10:53,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 00:10:54,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:10:54,091 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:10:54,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:10:54,092 INFO L85 PathProgramCache]: Analyzing trace with hash -2075232646, now seen corresponding path program 29 times [2023-11-29 00:10:54,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:10:54,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105854425] [2023-11-29 00:10:54,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:10:54,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:10:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:10:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:10:54,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:10:54,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105854425] [2023-11-29 00:10:54,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105854425] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:10:54,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95671300] [2023-11-29 00:10:54,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:10:54,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:10:54,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:10:54,294 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:10:54,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 00:10:54,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 00:10:54,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:10:54,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:10:54,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:10:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:10:54,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:10:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:10:54,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95671300] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:10:54,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:10:54,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-29 00:10:54,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252172081] [2023-11-29 00:10:54,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:10:54,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 00:10:54,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:10:54,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 00:10:54,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:10:54,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:10:54,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 691 places, 2144 transitions, 66549 flow. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:10:54,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:10:54,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:10:54,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:11:08,550 INFO L124 PetriNetUnfolderBase]: 5189/10853 cut-off events. [2023-11-29 00:11:08,550 INFO L125 PetriNetUnfolderBase]: For 547485/547485 co-relation queries the response was YES. [2023-11-29 00:11:08,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138932 conditions, 10853 events. 5189/10853 cut-off events. For 547485/547485 co-relation queries the response was YES. Maximal size of possible extension queue 815. Compared 98780 event pairs, 1435 based on Foata normal form. 42/10895 useless extension candidates. Maximal degree in co-relation 138725. Up to 6873 conditions per place. [2023-11-29 00:11:08,809 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 1740 selfloop transitions, 543 changer transitions 1/2285 dead transitions. [2023-11-29 00:11:08,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 717 places, 2285 transitions, 74762 flow [2023-11-29 00:11:08,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 00:11:08,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-29 00:11:08,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 250 transitions. [2023-11-29 00:11:08,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41050903119868637 [2023-11-29 00:11:08,811 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 250 transitions. [2023-11-29 00:11:08,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 250 transitions. [2023-11-29 00:11:08,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:11:08,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 250 transitions. [2023-11-29 00:11:08,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 8.620689655172415) internal successors, (250), 29 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:08,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 21.0) internal successors, (630), 30 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:08,813 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 21.0) internal successors, (630), 30 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:08,813 INFO L175 Difference]: Start difference. First operand has 691 places, 2144 transitions, 66549 flow. Second operand 29 states and 250 transitions. [2023-11-29 00:11:08,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 717 places, 2285 transitions, 74762 flow [2023-11-29 00:11:20,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 711 places, 2285 transitions, 73999 flow, removed 346 selfloop flow, removed 6 redundant places. [2023-11-29 00:11:20,586 INFO L231 Difference]: Finished difference. Result has 718 places, 2207 transitions, 70165 flow [2023-11-29 00:11:20,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=65591, PETRI_DIFFERENCE_MINUEND_PLACES=683, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=477, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=70165, PETRI_PLACES=718, PETRI_TRANSITIONS=2207} [2023-11-29 00:11:20,588 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 696 predicate places. [2023-11-29 00:11:20,588 INFO L495 AbstractCegarLoop]: Abstraction has has 718 places, 2207 transitions, 70165 flow [2023-11-29 00:11:20,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:20,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:11:20,589 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:11:20,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 00:11:20,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-29 00:11:20,789 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:11:20,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:11:20,789 INFO L85 PathProgramCache]: Analyzing trace with hash 667097462, now seen corresponding path program 30 times [2023-11-29 00:11:20,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:11:20,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032678809] [2023-11-29 00:11:20,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:11:20,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:11:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:11:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:11:20,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:11:20,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032678809] [2023-11-29 00:11:20,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032678809] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:11:20,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871427393] [2023-11-29 00:11:20,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:11:20,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:11:20,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:11:20,913 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:11:20,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 00:11:21,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 00:11:21,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:11:21,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:11:21,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:11:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:11:21,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:11:21,210 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:11:21,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871427393] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:11:21,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:11:21,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-11-29 00:11:21,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722788892] [2023-11-29 00:11:21,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:11:21,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:11:21,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:11:21,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:11:21,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:11:21,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:11:21,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 718 places, 2207 transitions, 70165 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 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) [2023-11-29 00:11:21,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:11:21,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:11:21,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:11:32,817 INFO L124 PetriNetUnfolderBase]: 5201/10897 cut-off events. [2023-11-29 00:11:32,817 INFO L125 PetriNetUnfolderBase]: For 560914/560914 co-relation queries the response was YES. [2023-11-29 00:11:32,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141317 conditions, 10897 events. 5201/10897 cut-off events. For 560914/560914 co-relation queries the response was YES. Maximal size of possible extension queue 822. Compared 99460 event pairs, 1506 based on Foata normal form. 18/10915 useless extension candidates. Maximal degree in co-relation 141104. Up to 6258 conditions per place. [2023-11-29 00:11:33,036 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1911 selfloop transitions, 349 changer transitions 13/2274 dead transitions. [2023-11-29 00:11:33,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 739 places, 2274 transitions, 76300 flow [2023-11-29 00:11:33,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 00:11:33,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 00:11:33,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 166 transitions. [2023-11-29 00:11:33,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3593073593073593 [2023-11-29 00:11:33,037 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 166 transitions. [2023-11-29 00:11:33,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 166 transitions. [2023-11-29 00:11:33,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:11:33,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 166 transitions. [2023-11-29 00:11:33,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 7.545454545454546) internal successors, (166), 22 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:33,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 21.0) internal successors, (483), 23 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:33,039 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 21.0) internal successors, (483), 23 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:33,039 INFO L175 Difference]: Start difference. First operand has 718 places, 2207 transitions, 70165 flow. Second operand 22 states and 166 transitions. [2023-11-29 00:11:33,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 739 places, 2274 transitions, 76300 flow [2023-11-29 00:11:45,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 731 places, 2274 transitions, 73759 flow, removed 1217 selfloop flow, removed 8 redundant places. [2023-11-29 00:11:45,626 INFO L231 Difference]: Finished difference. Result has 736 places, 2206 transitions, 69051 flow [2023-11-29 00:11:45,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=67717, PETRI_DIFFERENCE_MINUEND_PLACES=710, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=336, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1857, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=69051, PETRI_PLACES=736, PETRI_TRANSITIONS=2206} [2023-11-29 00:11:45,627 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 714 predicate places. [2023-11-29 00:11:45,628 INFO L495 AbstractCegarLoop]: Abstraction has has 736 places, 2206 transitions, 69051 flow [2023-11-29 00:11:45,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 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) [2023-11-29 00:11:45,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:11:45,628 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:11:45,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 00:11:45,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 00:11:45,828 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:11:45,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:11:45,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1214545176, now seen corresponding path program 31 times [2023-11-29 00:11:45,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:11:45,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482870478] [2023-11-29 00:11:45,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:11:45,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:11:45,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:11:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:11:45,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:11:45,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482870478] [2023-11-29 00:11:45,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482870478] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:11:45,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440190830] [2023-11-29 00:11:45,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:11:45,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:11:45,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:11:45,986 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:11:45,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 00:11:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:11:46,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:11:46,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:11:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:11:46,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:11:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:11:46,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440190830] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:11:46,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:11:46,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-29 00:11:46,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301188470] [2023-11-29 00:11:46,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:11:46,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 00:11:46,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:11:46,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 00:11:46,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:11:46,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:11:46,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 736 places, 2206 transitions, 69051 flow. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:46,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:11:46,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:11:46,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:12:02,404 INFO L124 PetriNetUnfolderBase]: 5435/11382 cut-off events. [2023-11-29 00:12:02,404 INFO L125 PetriNetUnfolderBase]: For 585907/585907 co-relation queries the response was YES. [2023-11-29 00:12:02,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144625 conditions, 11382 events. 5435/11382 cut-off events. For 585907/585907 co-relation queries the response was YES. Maximal size of possible extension queue 849. Compared 104656 event pairs, 1510 based on Foata normal form. 78/11460 useless extension candidates. Maximal degree in co-relation 144406. Up to 7094 conditions per place. [2023-11-29 00:12:02,752 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 1863 selfloop transitions, 495 changer transitions 0/2359 dead transitions. [2023-11-29 00:12:02,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 754 places, 2359 transitions, 77863 flow [2023-11-29 00:12:02,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 00:12:02,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-29 00:12:02,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 202 transitions. [2023-11-29 00:12:02,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2023-11-29 00:12:02,754 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 202 transitions. [2023-11-29 00:12:02,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 202 transitions. [2023-11-29 00:12:02,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:12:02,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 202 transitions. [2023-11-29 00:12:02,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 8.416666666666666) internal successors, (202), 24 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:12:02,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 21.0) internal successors, (525), 25 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:12:02,757 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 21.0) internal successors, (525), 25 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:12:02,757 INFO L175 Difference]: Start difference. First operand has 736 places, 2206 transitions, 69051 flow. Second operand 24 states and 202 transitions. [2023-11-29 00:12:02,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 754 places, 2359 transitions, 77863 flow [2023-11-29 00:12:17,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 735 places, 2359 transitions, 76940 flow, removed 264 selfloop flow, removed 19 redundant places. [2023-11-29 00:12:17,315 INFO L231 Difference]: Finished difference. Result has 744 places, 2291 transitions, 73389 flow [2023-11-29 00:12:17,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=67800, PETRI_DIFFERENCE_MINUEND_PLACES=712, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=409, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1749, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=73389, PETRI_PLACES=744, PETRI_TRANSITIONS=2291} [2023-11-29 00:12:17,317 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 722 predicate places. [2023-11-29 00:12:17,317 INFO L495 AbstractCegarLoop]: Abstraction has has 744 places, 2291 transitions, 73389 flow [2023-11-29 00:12:17,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:12:17,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:12:17,317 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:12:17,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 00:12:17,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-29 00:12:17,518 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:12:17,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:12:17,518 INFO L85 PathProgramCache]: Analyzing trace with hash -165541770, now seen corresponding path program 32 times [2023-11-29 00:12:17,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:12:17,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019110429] [2023-11-29 00:12:17,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:12:17,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:12:17,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:12:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:12:17,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:12:17,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019110429] [2023-11-29 00:12:17,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019110429] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:12:17,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075516221] [2023-11-29 00:12:17,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:12:17,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:12:17,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:12:17,685 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:12:17,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 00:12:17,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:12:17,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:12:17,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:12:17,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:12:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:12:17,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:12:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:12:17,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075516221] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:12:17,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:12:17,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-11-29 00:12:17,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361420090] [2023-11-29 00:12:17,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:12:17,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:12:17,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:12:17,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:12:17,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:12:17,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:12:17,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 744 places, 2291 transitions, 73389 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 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) [2023-11-29 00:12:17,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:12:17,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:12:17,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:12:35,058 INFO L124 PetriNetUnfolderBase]: 5518/11594 cut-off events. [2023-11-29 00:12:35,059 INFO L125 PetriNetUnfolderBase]: For 671995/671995 co-relation queries the response was YES. [2023-11-29 00:12:35,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152130 conditions, 11594 events. 5518/11594 cut-off events. For 671995/671995 co-relation queries the response was YES. Maximal size of possible extension queue 855. Compared 107054 event pairs, 1801 based on Foata normal form. 26/11620 useless extension candidates. Maximal degree in co-relation 151914. Up to 8822 conditions per place. [2023-11-29 00:12:35,301 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 1941 selfloop transitions, 435 changer transitions 4/2381 dead transitions. [2023-11-29 00:12:35,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 757 places, 2381 transitions, 80950 flow [2023-11-29 00:12:35,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 00:12:35,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 00:12:35,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 139 transitions. [2023-11-29 00:12:35,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2023-11-29 00:12:35,303 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 139 transitions. [2023-11-29 00:12:35,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 139 transitions. [2023-11-29 00:12:35,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:12:35,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 139 transitions. [2023-11-29 00:12:35,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 8.6875) internal successors, (139), 16 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:12:35,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 21.0) internal successors, (357), 17 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:12:35,304 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 21.0) internal successors, (357), 17 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:12:35,304 INFO L175 Difference]: Start difference. First operand has 744 places, 2291 transitions, 73389 flow. Second operand 16 states and 139 transitions. [2023-11-29 00:12:35,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 757 places, 2381 transitions, 80950 flow [2023-11-29 00:12:51,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 739 places, 2381 transitions, 78930 flow, removed 807 selfloop flow, removed 18 redundant places. [2023-11-29 00:12:52,005 INFO L231 Difference]: Finished difference. Result has 742 places, 2307 transitions, 73878 flow [2023-11-29 00:12:52,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=71351, PETRI_DIFFERENCE_MINUEND_PLACES=724, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=414, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1865, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=73878, PETRI_PLACES=742, PETRI_TRANSITIONS=2307} [2023-11-29 00:12:52,007 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 720 predicate places. [2023-11-29 00:12:52,007 INFO L495 AbstractCegarLoop]: Abstraction has has 742 places, 2307 transitions, 73878 flow [2023-11-29 00:12:52,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 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) [2023-11-29 00:12:52,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:12:52,008 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:12:52,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-29 00:12:52,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:12:52,208 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:12:52,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:12:52,209 INFO L85 PathProgramCache]: Analyzing trace with hash -358607570, now seen corresponding path program 33 times [2023-11-29 00:12:52,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:12:52,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012238333] [2023-11-29 00:12:52,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:12:52,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:12:52,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:12:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:12:54,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:12:54,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012238333] [2023-11-29 00:12:54,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012238333] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:12:54,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076401382] [2023-11-29 00:12:54,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:12:54,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:12:54,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:12:54,425 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:12:54,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7168ca2-ffb4-45ba-a474-72e72ac62c01/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-29 00:12:54,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 00:12:54,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:12:54,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 00:12:54,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:12:54,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 00:12:54,873 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:12:54,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-11-29 00:12:54,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:12:54,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:12:55,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 107 [2023-11-29 00:12:57,267 INFO L349 Elim1Store]: treesize reduction 5, result has 99.1 percent of original size [2023-11-29 00:12:57,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 19 new quantified variables, introduced 55 case distinctions, treesize of input 4312 treesize of output 3071 [2023-11-29 00:18:46,693 WARN L293 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 1326 DAG size of output: 1767 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)