./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/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_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/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_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/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 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:03:28,697 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:03:28,759 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:03:28,764 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:03:28,764 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:03:28,787 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:03:28,787 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:03:28,788 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:03:28,789 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:03:28,789 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:03:28,790 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:03:28,790 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:03:28,791 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:03:28,792 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:03:28,792 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:03:28,793 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:03:28,793 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:03:28,794 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:03:28,794 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:03:28,795 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:03:28,795 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:03:28,798 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:03:28,799 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:03:28,799 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:03:28,800 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:03:28,800 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:03:28,801 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:03:28,801 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:03:28,801 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:03:28,802 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:03:28,802 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:03:28,802 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:03:28,803 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:03:28,803 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:03:28,803 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:03:28,803 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:03:28,803 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:03:28,804 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:03:28,804 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:03:28,804 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:03:28,804 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:03:28,804 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:03:28,805 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_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 [2023-11-29 00:03:29,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:03:29,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:03:29,044 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:03:29,045 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:03:29,045 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:03:29,046 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/pthread/stack_longest-2.i [2023-11-29 00:03:31,805 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:03:32,029 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:03:32,030 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/sv-benchmarks/c/pthread/stack_longest-2.i [2023-11-29 00:03:32,046 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/data/bc1b5e370/91ecafb9864140beba17c495c2824ef2/FLAG04af3cc6c [2023-11-29 00:03:32,058 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/data/bc1b5e370/91ecafb9864140beba17c495c2824ef2 [2023-11-29 00:03:32,061 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:03:32,062 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:03:32,064 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:03:32,064 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:03:32,068 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:03:32,069 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:03:32" (1/1) ... [2023-11-29 00:03:32,070 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b57c9dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:32, skipping insertion in model container [2023-11-29 00:03:32,070 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:03:32" (1/1) ... [2023-11-29 00:03:32,116 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:03:32,453 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_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2023-11-29 00:03:32,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:03:32,486 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:03:32,522 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_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2023-11-29 00:03:32,532 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:03:32,585 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:03:32,586 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:32 WrapperNode [2023-11-29 00:03:32,586 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:03:32,587 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:03:32,587 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:03:32,587 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:03:32,593 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:32" (1/1) ... [2023-11-29 00:03:32,612 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:32" (1/1) ... [2023-11-29 00:03:32,640 INFO L138 Inliner]: procedures = 278, calls = 40, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 154 [2023-11-29 00:03:32,641 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:03:32,641 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:03:32,642 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:03:32,642 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:03:32,652 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:32" (1/1) ... [2023-11-29 00:03:32,652 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:32" (1/1) ... [2023-11-29 00:03:32,657 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:32" (1/1) ... [2023-11-29 00:03:32,674 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 5, 2, 2, 3]. 36 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0, 0, 0]. The 4 writes are split as follows [0, 0, 1, 1, 2]. [2023-11-29 00:03:32,674 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:32" (1/1) ... [2023-11-29 00:03:32,674 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:32" (1/1) ... [2023-11-29 00:03:32,684 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:32" (1/1) ... [2023-11-29 00:03:32,687 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:32" (1/1) ... [2023-11-29 00:03:32,690 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:32" (1/1) ... [2023-11-29 00:03:32,692 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:32" (1/1) ... [2023-11-29 00:03:32,696 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:03:32,697 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:03:32,697 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:03:32,697 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:03:32,698 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:32" (1/1) ... [2023-11-29 00:03:32,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:03:32,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:32,727 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:03:32,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:03:32,769 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-29 00:03:32,770 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-29 00:03:32,770 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-29 00:03:32,770 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-29 00:03:32,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:03:32,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:03:32,770 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 00:03:32,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 00:03:32,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 00:03:32,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 00:03:32,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 00:03:32,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 00:03:32,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 00:03:32,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 00:03:32,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 00:03:32,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 00:03:32,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 00:03:32,772 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 00:03:32,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:03:32,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:03:32,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 00:03:32,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 00:03:32,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 00:03:32,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 00:03:32,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:03:32,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:03:32,776 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 00:03:32,919 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:03:32,921 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:03:33,126 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:03:33,335 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:03:33,335 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 00:03:33,335 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:03:33 BoogieIcfgContainer [2023-11-29 00:03:33,335 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:03:33,338 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:03:33,338 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:03:33,342 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:03:33,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:03:32" (1/3) ... [2023-11-29 00:03:33,343 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a9f892c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:03:33, skipping insertion in model container [2023-11-29 00:03:33,343 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:32" (2/3) ... [2023-11-29 00:03:33,343 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a9f892c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:03:33, skipping insertion in model container [2023-11-29 00:03:33,343 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:03:33" (3/3) ... [2023-11-29 00:03:33,344 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2023-11-29 00:03:33,354 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 00:03:33,364 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:03:33,365 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-29 00:03:33,365 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 00:03:33,420 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 00:03:33,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 35 transitions, 84 flow [2023-11-29 00:03:33,484 INFO L124 PetriNetUnfolderBase]: 5/33 cut-off events. [2023-11-29 00:03:33,484 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 00:03:33,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 5/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 61 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 29. Up to 3 conditions per place. [2023-11-29 00:03:33,488 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 35 transitions, 84 flow [2023-11-29 00:03:33,491 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 31 transitions, 71 flow [2023-11-29 00:03:33,501 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:03:33,508 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;@4099295, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:03:33,509 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-29 00:03:33,518 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:03:33,518 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2023-11-29 00:03:33,519 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 00:03:33,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:03:33,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:33,520 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 00:03:33,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:33,525 INFO L85 PathProgramCache]: Analyzing trace with hash -28897917, now seen corresponding path program 1 times [2023-11-29 00:03:33,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:33,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094213266] [2023-11-29 00:03:33,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:33,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:33,873 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 00:03:33,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:33,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094213266] [2023-11-29 00:03:33,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094213266] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:03:33,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:03:33,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:03:33,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759645788] [2023-11-29 00:03:33,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:03:33,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:03:33,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:33,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:03:33,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:03:33,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2023-11-29 00:03:33,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 00:03:33,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:03:33,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2023-11-29 00:03:33,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:03:34,162 INFO L124 PetriNetUnfolderBase]: 321/604 cut-off events. [2023-11-29 00:03:34,162 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-29 00:03:34,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1187 conditions, 604 events. 321/604 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2742 event pairs, 57 based on Foata normal form. 45/610 useless extension candidates. Maximal degree in co-relation 1056. Up to 375 conditions per place. [2023-11-29 00:03:34,171 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 42 selfloop transitions, 3 changer transitions 3/54 dead transitions. [2023-11-29 00:03:34,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 54 transitions, 222 flow [2023-11-29 00:03:34,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:03:34,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:03:34,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2023-11-29 00:03:34,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2023-11-29 00:03:34,186 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 85 transitions. [2023-11-29 00:03:34,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 85 transitions. [2023-11-29 00:03:34,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:03:34,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 85 transitions. [2023-11-29 00:03:34,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 21.25) internal successors, (85), 4 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 00:03:34,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states 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 00:03:34,195 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states 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 00:03:34,197 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 71 flow. Second operand 4 states and 85 transitions. [2023-11-29 00:03:34,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 54 transitions, 222 flow [2023-11-29 00:03:34,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 54 transitions, 213 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 00:03:34,204 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 84 flow [2023-11-29 00:03:34,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-11-29 00:03:34,210 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2023-11-29 00:03:34,210 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 84 flow [2023-11-29 00:03:34,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 00:03:34,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:03:34,211 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:34,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:03:34,211 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 00:03:34,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:34,212 INFO L85 PathProgramCache]: Analyzing trace with hash 994745822, now seen corresponding path program 1 times [2023-11-29 00:03:34,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:34,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205462567] [2023-11-29 00:03:34,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:34,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:34,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:34,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:34,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205462567] [2023-11-29 00:03:34,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205462567] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:03:34,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127890717] [2023-11-29 00:03:34,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:34,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:34,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:34,383 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:34,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:03:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:34,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 00:03:34,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:34,605 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 8 treesize of output 1 [2023-11-29 00:03:34,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:34,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:03:34,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:34,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127890717] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:03:34,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:03:34,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-29 00:03:34,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9456877] [2023-11-29 00:03:34,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:03:34,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:03:34,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:34,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:03:34,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:03:34,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 00:03:34,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 84 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 00:03:34,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:03:34,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 00:03:34,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:03:35,529 INFO L124 PetriNetUnfolderBase]: 1316/2465 cut-off events. [2023-11-29 00:03:35,529 INFO L125 PetriNetUnfolderBase]: For 306/308 co-relation queries the response was YES. [2023-11-29 00:03:35,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5171 conditions, 2465 events. 1316/2465 cut-off events. For 306/308 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 13438 event pairs, 164 based on Foata normal form. 52/2411 useless extension candidates. Maximal degree in co-relation 4582. Up to 383 conditions per place. [2023-11-29 00:03:35,551 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 168 selfloop transitions, 32 changer transitions 6/211 dead transitions. [2023-11-29 00:03:35,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 211 transitions, 928 flow [2023-11-29 00:03:35,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 00:03:35,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 00:03:35,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 320 transitions. [2023-11-29 00:03:35,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2023-11-29 00:03:35,556 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 320 transitions. [2023-11-29 00:03:35,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 320 transitions. [2023-11-29 00:03:35,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:03:35,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 320 transitions. [2023-11-29 00:03:35,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 21.333333333333332) internal successors, (320), 15 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 00:03:35,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 0 states have call successors, (0), 0 states 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 00:03:35,564 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 0 states have call successors, (0), 0 states 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 00:03:35,564 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 84 flow. Second operand 15 states and 320 transitions. [2023-11-29 00:03:35,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 211 transitions, 928 flow [2023-11-29 00:03:35,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 211 transitions, 924 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:03:35,571 INFO L231 Difference]: Finished difference. Result has 55 places, 67 transitions, 331 flow [2023-11-29 00:03:35,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=331, PETRI_PLACES=55, PETRI_TRANSITIONS=67} [2023-11-29 00:03:35,573 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 22 predicate places. [2023-11-29 00:03:35,573 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 67 transitions, 331 flow [2023-11-29 00:03:35,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 00:03:35,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:03:35,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:35,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:03:35,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:35,775 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 00:03:35,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:35,775 INFO L85 PathProgramCache]: Analyzing trace with hash 134985196, now seen corresponding path program 1 times [2023-11-29 00:03:35,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:35,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278952691] [2023-11-29 00:03:35,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:35,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:35,884 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 00:03:35,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:35,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278952691] [2023-11-29 00:03:35,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278952691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:03:35,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:03:35,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:03:35,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762205043] [2023-11-29 00:03:35,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:03:35,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:03:35,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:35,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:03:35,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:03:35,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2023-11-29 00:03:35,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 67 transitions, 331 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 00:03:35,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:03:35,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2023-11-29 00:03:35,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:03:36,141 INFO L124 PetriNetUnfolderBase]: 716/1463 cut-off events. [2023-11-29 00:03:36,142 INFO L125 PetriNetUnfolderBase]: For 615/615 co-relation queries the response was YES. [2023-11-29 00:03:36,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3275 conditions, 1463 events. 716/1463 cut-off events. For 615/615 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7625 event pairs, 252 based on Foata normal form. 66/1512 useless extension candidates. Maximal degree in co-relation 3127. Up to 664 conditions per place. [2023-11-29 00:03:36,154 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 45 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2023-11-29 00:03:36,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 61 transitions, 347 flow [2023-11-29 00:03:36,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:03:36,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:03:36,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2023-11-29 00:03:36,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2023-11-29 00:03:36,156 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 60 transitions. [2023-11-29 00:03:36,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 60 transitions. [2023-11-29 00:03:36,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:03:36,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 60 transitions. [2023-11-29 00:03:36,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states 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 00:03:36,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 00:03:36,157 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 00:03:36,158 INFO L175 Difference]: Start difference. First operand has 55 places, 67 transitions, 331 flow. Second operand 3 states and 60 transitions. [2023-11-29 00:03:36,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 61 transitions, 347 flow [2023-11-29 00:03:36,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 315 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-11-29 00:03:36,166 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 200 flow [2023-11-29 00:03:36,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2023-11-29 00:03:36,167 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 18 predicate places. [2023-11-29 00:03:36,167 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 200 flow [2023-11-29 00:03:36,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 00:03:36,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:03:36,168 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 00:03:36,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 00:03:36,168 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 00:03:36,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:36,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1587857623, now seen corresponding path program 1 times [2023-11-29 00:03:36,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:36,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402470501] [2023-11-29 00:03:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:36,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:36,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:36,590 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 00:03:36,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:36,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402470501] [2023-11-29 00:03:36,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402470501] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:03:36,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:03:36,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:03:36,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748803334] [2023-11-29 00:03:36,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:03:36,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:03:36,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:36,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:03:36,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:03:36,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2023-11-29 00:03:36,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 200 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 00:03:36,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:03:36,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2023-11-29 00:03:36,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:03:36,994 INFO L124 PetriNetUnfolderBase]: 894/1823 cut-off events. [2023-11-29 00:03:36,995 INFO L125 PetriNetUnfolderBase]: For 598/598 co-relation queries the response was YES. [2023-11-29 00:03:37,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4123 conditions, 1823 events. 894/1823 cut-off events. For 598/598 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 9841 event pairs, 294 based on Foata normal form. 0/1801 useless extension candidates. Maximal degree in co-relation 3739. Up to 1052 conditions per place. [2023-11-29 00:03:37,010 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 59 selfloop transitions, 7 changer transitions 8/86 dead transitions. [2023-11-29 00:03:37,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 86 transitions, 454 flow [2023-11-29 00:03:37,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:03:37,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:03:37,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2023-11-29 00:03:37,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2023-11-29 00:03:37,012 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 100 transitions. [2023-11-29 00:03:37,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 100 transitions. [2023-11-29 00:03:37,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:03:37,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 100 transitions. [2023-11-29 00:03:37,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 00:03:37,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states 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 00:03:37,014 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states 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 00:03:37,014 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 200 flow. Second operand 5 states and 100 transitions. [2023-11-29 00:03:37,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 86 transitions, 454 flow [2023-11-29 00:03:37,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 86 transitions, 443 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:03:37,020 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 253 flow [2023-11-29 00:03:37,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=253, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2023-11-29 00:03:37,021 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 23 predicate places. [2023-11-29 00:03:37,022 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 253 flow [2023-11-29 00:03:37,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 00:03:37,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:03:37,022 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:37,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 00:03:37,022 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 00:03:37,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:37,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1957737570, now seen corresponding path program 1 times [2023-11-29 00:03:37,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:37,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306688569] [2023-11-29 00:03:37,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:37,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:37,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:37,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:37,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306688569] [2023-11-29 00:03:37,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306688569] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:03:37,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993456233] [2023-11-29 00:03:37,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:37,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:37,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:37,489 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:37,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:03:37,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:37,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 00:03:37,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:37,689 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 18 treesize of output 14 [2023-11-29 00:03:37,870 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 80 treesize of output 32 [2023-11-29 00:03:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:03:37,923 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:03:37,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993456233] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:03:37,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:03:37,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2023-11-29 00:03:37,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192667895] [2023-11-29 00:03:37,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:03:37,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:03:37,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:37,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:03:37,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:03:37,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 00:03:37,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 253 flow. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:37,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:03:37,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 00:03:37,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:03:38,357 INFO L124 PetriNetUnfolderBase]: 1068/2117 cut-off events. [2023-11-29 00:03:38,358 INFO L125 PetriNetUnfolderBase]: For 982/982 co-relation queries the response was YES. [2023-11-29 00:03:38,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4855 conditions, 2117 events. 1068/2117 cut-off events. For 982/982 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 11646 event pairs, 547 based on Foata normal form. 0/2075 useless extension candidates. Maximal degree in co-relation 4216. Up to 1170 conditions per place. [2023-11-29 00:03:38,373 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 53 selfloop transitions, 31 changer transitions 0/89 dead transitions. [2023-11-29 00:03:38,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 89 transitions, 530 flow [2023-11-29 00:03:38,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:03:38,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 00:03:38,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2023-11-29 00:03:38,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2023-11-29 00:03:38,374 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 97 transitions. [2023-11-29 00:03:38,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 97 transitions. [2023-11-29 00:03:38,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:03:38,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 97 transitions. [2023-11-29 00:03:38,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:38,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states 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 00:03:38,376 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states 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 00:03:38,376 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 253 flow. Second operand 6 states and 97 transitions. [2023-11-29 00:03:38,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 89 transitions, 530 flow [2023-11-29 00:03:38,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 89 transitions, 522 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-29 00:03:38,381 INFO L231 Difference]: Finished difference. Result has 61 places, 62 transitions, 386 flow [2023-11-29 00:03:38,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=386, PETRI_PLACES=61, PETRI_TRANSITIONS=62} [2023-11-29 00:03:38,382 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 28 predicate places. [2023-11-29 00:03:38,383 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 62 transitions, 386 flow [2023-11-29 00:03:38,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:38,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:03:38,383 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:38,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:03:38,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:38,589 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 00:03:38,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:38,590 INFO L85 PathProgramCache]: Analyzing trace with hash 742439305, now seen corresponding path program 1 times [2023-11-29 00:03:38,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:38,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927467650] [2023-11-29 00:03:38,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:38,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:38,858 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:03:38,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:38,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927467650] [2023-11-29 00:03:38,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927467650] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:03:38,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798768176] [2023-11-29 00:03:38,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:38,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:38,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:38,862 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:38,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:03:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:39,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 00:03:39,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:39,038 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 8 treesize of output 1 [2023-11-29 00:03:39,100 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 8 treesize of output 1 [2023-11-29 00:03:39,330 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:39,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:03:39,407 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:03:39,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798768176] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:03:39,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:03:39,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 14 [2023-11-29 00:03:39,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133686380] [2023-11-29 00:03:39,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:03:39,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:03:39,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:39,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:03:39,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:03:39,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 00:03:39,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 62 transitions, 386 flow. Second operand has 14 states, 14 states have (on average 11.642857142857142) internal successors, (163), 14 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 00:03:39,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:03:39,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 00:03:39,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:03:40,462 INFO L124 PetriNetUnfolderBase]: 1896/3753 cut-off events. [2023-11-29 00:03:40,462 INFO L125 PetriNetUnfolderBase]: For 2992/2992 co-relation queries the response was YES. [2023-11-29 00:03:40,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9073 conditions, 3753 events. 1896/3753 cut-off events. For 2992/2992 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 22008 event pairs, 281 based on Foata normal form. 52/3787 useless extension candidates. Maximal degree in co-relation 8260. Up to 561 conditions per place. [2023-11-29 00:03:40,482 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 180 selfloop transitions, 61 changer transitions 18/264 dead transitions. [2023-11-29 00:03:40,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 264 transitions, 1572 flow [2023-11-29 00:03:40,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 00:03:40,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 00:03:40,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 362 transitions. [2023-11-29 00:03:40,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.544360902255639 [2023-11-29 00:03:40,484 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 362 transitions. [2023-11-29 00:03:40,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 362 transitions. [2023-11-29 00:03:40,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:03:40,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 362 transitions. [2023-11-29 00:03:40,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 19.05263157894737) internal successors, (362), 19 states have internal predecessors, (362), 0 states have call successors, (0), 0 states 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 00:03:40,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 35.0) internal successors, (700), 20 states have internal predecessors, (700), 0 states have call successors, (0), 0 states 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 00:03:40,489 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 35.0) internal successors, (700), 20 states have internal predecessors, (700), 0 states have call successors, (0), 0 states 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 00:03:40,489 INFO L175 Difference]: Start difference. First operand has 61 places, 62 transitions, 386 flow. Second operand 19 states and 362 transitions. [2023-11-29 00:03:40,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 264 transitions, 1572 flow [2023-11-29 00:03:40,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 264 transitions, 1497 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-11-29 00:03:40,532 INFO L231 Difference]: Finished difference. Result has 81 places, 97 transitions, 737 flow [2023-11-29 00:03:40,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=737, PETRI_PLACES=81, PETRI_TRANSITIONS=97} [2023-11-29 00:03:40,533 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 48 predicate places. [2023-11-29 00:03:40,534 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 97 transitions, 737 flow [2023-11-29 00:03:40,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.642857142857142) internal successors, (163), 14 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 00:03:40,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:03:40,534 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:40,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 00:03:40,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 00:03:40,738 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 00:03:40,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:40,739 INFO L85 PathProgramCache]: Analyzing trace with hash -235686699, now seen corresponding path program 1 times [2023-11-29 00:03:40,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:40,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832868101] [2023-11-29 00:03:40,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:40,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:41,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:41,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:41,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832868101] [2023-11-29 00:03:41,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832868101] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:03:41,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28404311] [2023-11-29 00:03:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:41,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:41,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:41,763 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:41,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:03:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:41,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 00:03:41,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:41,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 00:03:42,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 50 treesize of output 19 [2023-11-29 00:03:42,313 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 56 treesize of output 32 [2023-11-29 00:03:42,359 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:42,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:03:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:42,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28404311] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:03:42,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:03:42,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2023-11-29 00:03:42,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255170475] [2023-11-29 00:03:42,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:03:42,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:03:42,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:42,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:03:42,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:03:42,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 00:03:42,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 97 transitions, 737 flow. Second operand has 18 states, 18 states have (on average 10.833333333333334) internal successors, (195), 18 states have internal predecessors, (195), 0 states have call successors, (0), 0 states 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 00:03:42,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:03:42,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 00:03:42,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:03:47,148 INFO L124 PetriNetUnfolderBase]: 3241/6396 cut-off events. [2023-11-29 00:03:47,148 INFO L125 PetriNetUnfolderBase]: For 7282/7282 co-relation queries the response was YES. [2023-11-29 00:03:47,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15916 conditions, 6396 events. 3241/6396 cut-off events. For 7282/7282 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 39798 event pairs, 467 based on Foata normal form. 0/6386 useless extension candidates. Maximal degree in co-relation 14919. Up to 972 conditions per place. [2023-11-29 00:03:47,180 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 281 selfloop transitions, 102 changer transitions 69/457 dead transitions. [2023-11-29 00:03:47,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 457 transitions, 2894 flow [2023-11-29 00:03:47,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 00:03:47,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-29 00:03:47,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 659 transitions. [2023-11-29 00:03:47,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49548872180451126 [2023-11-29 00:03:47,185 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 659 transitions. [2023-11-29 00:03:47,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 659 transitions. [2023-11-29 00:03:47,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:03:47,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 659 transitions. [2023-11-29 00:03:47,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 17.342105263157894) internal successors, (659), 38 states have internal predecessors, (659), 0 states have call successors, (0), 0 states 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 00:03:47,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 35.0) internal successors, (1365), 39 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states 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 00:03:47,193 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 35.0) internal successors, (1365), 39 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states 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 00:03:47,193 INFO L175 Difference]: Start difference. First operand has 81 places, 97 transitions, 737 flow. Second operand 38 states and 659 transitions. [2023-11-29 00:03:47,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 457 transitions, 2894 flow [2023-11-29 00:03:47,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 457 transitions, 2731 flow, removed 41 selfloop flow, removed 4 redundant places. [2023-11-29 00:03:47,225 INFO L231 Difference]: Finished difference. Result has 122 places, 151 transitions, 1340 flow [2023-11-29 00:03:47,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1340, PETRI_PLACES=122, PETRI_TRANSITIONS=151} [2023-11-29 00:03:47,227 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 89 predicate places. [2023-11-29 00:03:47,227 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 151 transitions, 1340 flow [2023-11-29 00:03:47,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.833333333333334) internal successors, (195), 18 states have internal predecessors, (195), 0 states have call successors, (0), 0 states 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 00:03:47,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:03:47,227 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2023-11-29 00:03:47,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 00:03:47,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:47,433 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 00:03:47,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:47,434 INFO L85 PathProgramCache]: Analyzing trace with hash 449342831, now seen corresponding path program 2 times [2023-11-29 00:03:47,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:47,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717040420] [2023-11-29 00:03:47,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:47,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:47,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:47,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717040420] [2023-11-29 00:03:47,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717040420] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:03:47,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576150556] [2023-11-29 00:03:47,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:03:47,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:47,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:47,881 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:47,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:03:48,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:03:48,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:03:48,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 00:03:48,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:48,070 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 8 treesize of output 1 [2023-11-29 00:03:48,129 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 8 treesize of output 1 [2023-11-29 00:03:48,206 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 8 treesize of output 1 [2023-11-29 00:03:48,276 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 8 treesize of output 1 [2023-11-29 00:03:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:48,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:03:48,535 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:48,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576150556] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:03:48,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:03:48,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 27 [2023-11-29 00:03:48,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947905519] [2023-11-29 00:03:48,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:03:48,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 00:03:48,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:48,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 00:03:48,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2023-11-29 00:03:48,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 00:03:48,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 151 transitions, 1340 flow. Second operand has 28 states, 28 states have (on average 9.785714285714286) internal successors, (274), 28 states have internal predecessors, (274), 0 states have call successors, (0), 0 states 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 00:03:48,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:03:48,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 00:03:48,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:03:52,495 INFO L124 PetriNetUnfolderBase]: 9954/19432 cut-off events. [2023-11-29 00:03:52,496 INFO L125 PetriNetUnfolderBase]: For 30534/30534 co-relation queries the response was YES. [2023-11-29 00:03:52,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50913 conditions, 19432 events. 9954/19432 cut-off events. For 30534/30534 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 137696 event pairs, 1975 based on Foata normal form. 178/19608 useless extension candidates. Maximal degree in co-relation 48843. Up to 2949 conditions per place. [2023-11-29 00:03:52,587 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 591 selfloop transitions, 357 changer transitions 36/989 dead transitions. [2023-11-29 00:03:52,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 989 transitions, 7633 flow [2023-11-29 00:03:52,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-29 00:03:52,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-11-29 00:03:52,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 1101 transitions. [2023-11-29 00:03:52,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5242857142857142 [2023-11-29 00:03:52,592 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 1101 transitions. [2023-11-29 00:03:52,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 1101 transitions. [2023-11-29 00:03:52,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:03:52,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 1101 transitions. [2023-11-29 00:03:52,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 18.35) internal successors, (1101), 60 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states 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 00:03:52,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 35.0) internal successors, (2135), 61 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states 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 00:03:52,600 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 35.0) internal successors, (2135), 61 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states 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 00:03:52,600 INFO L175 Difference]: Start difference. First operand has 122 places, 151 transitions, 1340 flow. Second operand 60 states and 1101 transitions. [2023-11-29 00:03:52,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 989 transitions, 7633 flow [2023-11-29 00:03:52,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 989 transitions, 7282 flow, removed 145 selfloop flow, removed 5 redundant places. [2023-11-29 00:03:52,759 INFO L231 Difference]: Finished difference. Result has 192 places, 425 transitions, 4542 flow [2023-11-29 00:03:52,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=4542, PETRI_PLACES=192, PETRI_TRANSITIONS=425} [2023-11-29 00:03:52,760 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 159 predicate places. [2023-11-29 00:03:52,760 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 425 transitions, 4542 flow [2023-11-29 00:03:52,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 9.785714285714286) internal successors, (274), 28 states have internal predecessors, (274), 0 states have call successors, (0), 0 states 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 00:03:52,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:03:52,761 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:52,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:03:52,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:52,967 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 00:03:52,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:52,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1522174711, now seen corresponding path program 2 times [2023-11-29 00:03:52,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:52,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696947548] [2023-11-29 00:03:52,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:52,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:53,942 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:53,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:53,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696947548] [2023-11-29 00:03:53,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696947548] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:03:53,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680613286] [2023-11-29 00:03:53,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:03:53,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:53,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:53,944 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:53,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:03:54,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:03:54,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:03:54,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 00:03:54,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:54,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 00:03:54,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:03:54,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 18 [2023-11-29 00:03:54,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 19 [2023-11-29 00:03:55,186 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 80 treesize of output 32 [2023-11-29 00:03:55,235 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:55,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:03:56,045 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:56,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680613286] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:03:56,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:03:56,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 26 [2023-11-29 00:03:56,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855266838] [2023-11-29 00:03:56,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:03:56,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 00:03:56,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:56,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 00:03:56,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2023-11-29 00:03:56,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 00:03:56,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 425 transitions, 4542 flow. Second operand has 26 states, 26 states have (on average 10.538461538461538) internal successors, (274), 26 states have internal predecessors, (274), 0 states have call successors, (0), 0 states 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 00:03:56,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:03:56,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 00:03:56,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:04:09,405 INFO L124 PetriNetUnfolderBase]: 23321/45203 cut-off events. [2023-11-29 00:04:09,405 INFO L125 PetriNetUnfolderBase]: For 103612/103612 co-relation queries the response was YES. [2023-11-29 00:04:09,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125262 conditions, 45203 events. 23321/45203 cut-off events. For 103612/103612 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 363210 event pairs, 3045 based on Foata normal form. 104/45305 useless extension candidates. Maximal degree in co-relation 123011. Up to 6936 conditions per place. [2023-11-29 00:04:09,735 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 480 selfloop transitions, 983 changer transitions 84/1552 dead transitions. [2023-11-29 00:04:09,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 1552 transitions, 15706 flow [2023-11-29 00:04:09,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-11-29 00:04:09,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2023-11-29 00:04:09,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 1160 transitions. [2023-11-29 00:04:09,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45401174168297453 [2023-11-29 00:04:09,741 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 1160 transitions. [2023-11-29 00:04:09,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 1160 transitions. [2023-11-29 00:04:09,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:04:09,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 1160 transitions. [2023-11-29 00:04:09,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 15.89041095890411) internal successors, (1160), 73 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states 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 00:04:09,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 35.0) internal successors, (2590), 74 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states 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 00:04:09,753 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 35.0) internal successors, (2590), 74 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states 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 00:04:09,753 INFO L175 Difference]: Start difference. First operand has 192 places, 425 transitions, 4542 flow. Second operand 73 states and 1160 transitions. [2023-11-29 00:04:09,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 1552 transitions, 15706 flow [2023-11-29 00:04:10,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 1552 transitions, 15356 flow, removed 175 selfloop flow, removed 0 redundant places. [2023-11-29 00:04:10,560 INFO L231 Difference]: Finished difference. Result has 274 places, 1033 transitions, 13261 flow [2023-11-29 00:04:10,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4416, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=13261, PETRI_PLACES=274, PETRI_TRANSITIONS=1033} [2023-11-29 00:04:10,561 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 241 predicate places. [2023-11-29 00:04:10,561 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 1033 transitions, 13261 flow [2023-11-29 00:04:10,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 10.538461538461538) internal successors, (274), 26 states have internal predecessors, (274), 0 states have call successors, (0), 0 states 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 00:04:10,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:04:10,562 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:04:10,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:04:10,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:04:10,763 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 00:04:10,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:04:10,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1396664621, now seen corresponding path program 1 times [2023-11-29 00:04:10,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:04:10,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289903412] [2023-11-29 00:04:10,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:04:10,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:04:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:04:11,295 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 75 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:04:11,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:04:11,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289903412] [2023-11-29 00:04:11,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289903412] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:04:11,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7135566] [2023-11-29 00:04:11,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:04:11,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:04:11,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:04:11,297 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:04:11,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:04:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:04:11,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 00:04:11,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:04:11,524 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 8 treesize of output 1 [2023-11-29 00:04:11,570 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 8 treesize of output 1 [2023-11-29 00:04:11,624 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 8 treesize of output 1 [2023-11-29 00:04:11,687 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 8 treesize of output 1 [2023-11-29 00:04:11,738 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 8 treesize of output 1 [2023-11-29 00:04:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:04:11,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:04:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 00:04:12,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7135566] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:04:12,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:04:12,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 8] total 28 [2023-11-29 00:04:12,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410739878] [2023-11-29 00:04:12,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:04:12,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 00:04:12,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:04:12,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 00:04:12,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=541, Unknown=0, NotChecked=0, Total=756 [2023-11-29 00:04:12,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 00:04:12,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 1033 transitions, 13261 flow. Second operand has 28 states, 28 states have (on average 11.178571428571429) internal successors, (313), 28 states have internal predecessors, (313), 0 states have call successors, (0), 0 states 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 00:04:12,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:04:12,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 00:04:12,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:04:38,684 INFO L124 PetriNetUnfolderBase]: 49490/95534 cut-off events. [2023-11-29 00:04:38,684 INFO L125 PetriNetUnfolderBase]: For 326842/326842 co-relation queries the response was YES. [2023-11-29 00:04:39,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284442 conditions, 95534 events. 49490/95534 cut-off events. For 326842/326842 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 806856 event pairs, 7246 based on Foata normal form. 858/96390 useless extension candidates. Maximal degree in co-relation 282187. Up to 14661 conditions per place. [2023-11-29 00:04:39,489 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 746 selfloop transitions, 2017 changer transitions 51/2819 dead transitions. [2023-11-29 00:04:39,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 2819 transitions, 35599 flow [2023-11-29 00:04:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-29 00:04:39,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-11-29 00:04:39,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 1174 transitions. [2023-11-29 00:04:39,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516043956043956 [2023-11-29 00:04:39,493 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 1174 transitions. [2023-11-29 00:04:39,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 1174 transitions. [2023-11-29 00:04:39,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:04:39,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 1174 transitions. [2023-11-29 00:04:39,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 18.06153846153846) internal successors, (1174), 65 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states 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 00:04:39,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 35.0) internal successors, (2310), 66 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states 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 00:04:39,500 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 35.0) internal successors, (2310), 66 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states 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 00:04:39,500 INFO L175 Difference]: Start difference. First operand has 274 places, 1033 transitions, 13261 flow. Second operand 65 states and 1174 transitions. [2023-11-29 00:04:39,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 2819 transitions, 35599 flow [2023-11-29 00:04:44,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 2819 transitions, 32811 flow, removed 487 selfloop flow, removed 9 redundant places. [2023-11-29 00:04:44,756 INFO L231 Difference]: Finished difference. Result has 340 places, 2198 transitions, 30329 flow [2023-11-29 00:04:44,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=11867, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1031, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=920, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=30329, PETRI_PLACES=340, PETRI_TRANSITIONS=2198} [2023-11-29 00:04:44,758 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 307 predicate places. [2023-11-29 00:04:44,758 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 2198 transitions, 30329 flow [2023-11-29 00:04:44,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 11.178571428571429) internal successors, (313), 28 states have internal predecessors, (313), 0 states have call successors, (0), 0 states 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 00:04:44,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:04:44,759 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:04:44,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:04:44,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:04:44,960 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 00:04:44,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:04:44,960 INFO L85 PathProgramCache]: Analyzing trace with hash -408974119, now seen corresponding path program 3 times [2023-11-29 00:04:44,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:04:44,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655559294] [2023-11-29 00:04:44,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:04:44,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:04:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:04:46,652 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:04:46,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:04:46,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655559294] [2023-11-29 00:04:46,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655559294] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:04:46,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942006622] [2023-11-29 00:04:46,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:04:46,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:04:46,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:04:46,654 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:04:46,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:04:46,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 00:04:46,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:04:46,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 00:04:46,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:04:46,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 00:04:47,148 INFO L349 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2023-11-29 00:04:47,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 18 [2023-11-29 00:04:47,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:04:47,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 19 [2023-11-29 00:04:47,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2023-11-29 00:04:48,727 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:04:48,727 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 104 treesize of output 38 [2023-11-29 00:04:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 9 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:04:48,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:04:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 9 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:04:50,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942006622] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:04:50,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:04:50,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 14] total 33 [2023-11-29 00:04:50,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547431118] [2023-11-29 00:04:50,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:04:50,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 00:04:50,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:04:50,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 00:04:50,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 00:04:50,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 00:04:50,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 2198 transitions, 30329 flow. Second operand has 33 states, 33 states have (on average 10.696969696969697) internal successors, (353), 33 states have internal predecessors, (353), 0 states have call successors, (0), 0 states 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 00:04:50,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:04:50,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 00:04:50,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:06:36,676 INFO L124 PetriNetUnfolderBase]: 113919/218556 cut-off events. [2023-11-29 00:06:36,676 INFO L125 PetriNetUnfolderBase]: For 716365/716365 co-relation queries the response was YES. [2023-11-29 00:06:38,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675792 conditions, 218556 events. 113919/218556 cut-off events. For 716365/716365 co-relation queries the response was YES. Maximal size of possible extension queue 1431. Compared 2055466 event pairs, 13635 based on Foata normal form. 240/218794 useless extension candidates. Maximal degree in co-relation 673496. Up to 33768 conditions per place. [2023-11-29 00:06:38,838 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 1005 selfloop transitions, 5131 changer transitions 168/6309 dead transitions. [2023-11-29 00:06:38,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 6309 transitions, 87610 flow [2023-11-29 00:06:38,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2023-11-29 00:06:38,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2023-11-29 00:06:38,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 2475 transitions. [2023-11-29 00:06:38,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45040946314831665 [2023-11-29 00:06:38,845 INFO L72 ComplementDD]: Start complementDD. Operand 157 states and 2475 transitions. [2023-11-29 00:06:38,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 157 states and 2475 transitions. [2023-11-29 00:06:38,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:06:38,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 157 states and 2475 transitions. [2023-11-29 00:06:38,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 158 states, 157 states have (on average 15.764331210191083) internal successors, (2475), 157 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states 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 00:06:38,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 158 states, 158 states have (on average 35.0) internal successors, (5530), 158 states have internal predecessors, (5530), 0 states have call successors, (0), 0 states 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 00:06:38,866 INFO L81 ComplementDD]: Finished complementDD. Result has 158 states, 158 states have (on average 35.0) internal successors, (5530), 158 states have internal predecessors, (5530), 0 states have call successors, (0), 0 states 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 00:06:38,867 INFO L175 Difference]: Start difference. First operand has 340 places, 2198 transitions, 30329 flow. Second operand 157 states and 2475 transitions. [2023-11-29 00:06:38,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 6309 transitions, 87610 flow [2023-11-29 00:07:08,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 6309 transitions, 87068 flow, removed 265 selfloop flow, removed 1 redundant places. [2023-11-29 00:07:08,977 INFO L231 Difference]: Finished difference. Result has 507 places, 5226 transitions, 82976 flow [2023-11-29 00:07:08,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=30129, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=157, PETRI_FLOW=82976, PETRI_PLACES=507, PETRI_TRANSITIONS=5226} [2023-11-29 00:07:08,979 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 474 predicate places. [2023-11-29 00:07:08,979 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 5226 transitions, 82976 flow [2023-11-29 00:07:08,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 10.696969696969697) internal successors, (353), 33 states have internal predecessors, (353), 0 states have call successors, (0), 0 states 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 00:07:08,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:07:08,980 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 7, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:07:08,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:07:09,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:09,180 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 00:07:09,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:09,181 INFO L85 PathProgramCache]: Analyzing trace with hash -334184317, now seen corresponding path program 2 times [2023-11-29 00:07:09,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:09,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321852699] [2023-11-29 00:07:09,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:09,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:09,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:09,920 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 12 proven. 139 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 00:07:09,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:09,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321852699] [2023-11-29 00:07:09,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321852699] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:07:09,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663597429] [2023-11-29 00:07:09,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:07:09,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:09,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:09,922 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:09,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:07:10,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:07:10,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:07:10,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 00:07:10,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:10,188 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 8 treesize of output 1 [2023-11-29 00:07:10,252 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 8 treesize of output 1 [2023-11-29 00:07:10,316 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 8 treesize of output 1 [2023-11-29 00:07:10,382 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 8 treesize of output 1 [2023-11-29 00:07:10,454 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 8 treesize of output 1 [2023-11-29 00:07:10,518 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 8 treesize of output 1 [2023-11-29 00:07:10,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 36 treesize of output 23 [2023-11-29 00:07:10,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 5 [2023-11-29 00:07:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 9 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:07:10,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 71 proven. 14 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-29 00:07:10,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663597429] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:07:10,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:07:10,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 19, 8] total 34 [2023-11-29 00:07:10,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331737726] [2023-11-29 00:07:10,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:07:10,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 00:07:10,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:10,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 00:07:10,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 00:07:10,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 00:07:10,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 5226 transitions, 82976 flow. Second operand has 34 states, 34 states have (on average 10.882352941176471) internal successors, (370), 34 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 00:07:10,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:07:10,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 00:07:10,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:11:11,146 INFO L124 PetriNetUnfolderBase]: 170316/331101 cut-off events. [2023-11-29 00:11:11,146 INFO L125 PetriNetUnfolderBase]: For 1581618/1581618 co-relation queries the response was YES. [2023-11-29 00:11:13,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1075545 conditions, 331101 events. 170316/331101 cut-off events. For 1581618/1581618 co-relation queries the response was YES. Maximal size of possible extension queue 2157. Compared 3364290 event pairs, 26546 based on Foata normal form. 5600/336699 useless extension candidates. Maximal degree in co-relation 1073160. Up to 51447 conditions per place. [2023-11-29 00:11:14,851 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 1464 selfloop transitions, 7292 changer transitions 81/8842 dead transitions. [2023-11-29 00:11:14,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 595 places, 8842 transitions, 143466 flow [2023-11-29 00:11:14,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-11-29 00:11:14,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2023-11-29 00:11:14,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 1657 transitions. [2023-11-29 00:11:14,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5036474164133738 [2023-11-29 00:11:14,855 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 1657 transitions. [2023-11-29 00:11:14,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 1657 transitions. [2023-11-29 00:11:14,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:11:14,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 1657 transitions. [2023-11-29 00:11:14,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 17.627659574468087) internal successors, (1657), 94 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states 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 00:11:14,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 35.0) internal successors, (3325), 95 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states 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 00:11:14,867 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 35.0) internal successors, (3325), 95 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states 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 00:11:14,867 INFO L175 Difference]: Start difference. First operand has 507 places, 5226 transitions, 82976 flow. Second operand 94 states and 1657 transitions. [2023-11-29 00:11:14,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 595 places, 8842 transitions, 143466 flow [2023-11-29 00:13:00,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 8842 transitions, 142241 flow, removed 379 selfloop flow, removed 5 redundant places. [2023-11-29 00:13:01,063 INFO L231 Difference]: Finished difference. Result has 610 places, 7692 transitions, 139879 flow [2023-11-29 00:13:01,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=73254, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4432, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=139879, PETRI_PLACES=610, PETRI_TRANSITIONS=7692} [2023-11-29 00:13:01,067 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 577 predicate places. [2023-11-29 00:13:01,067 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 7692 transitions, 139879 flow [2023-11-29 00:13:01,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 10.882352941176471) internal successors, (370), 34 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 00:13:01,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:13:01,068 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2023-11-29 00:13:01,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:13:01,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 00:13:01,268 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 00:13:01,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:13:01,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1297943087, now seen corresponding path program 3 times [2023-11-29 00:13:01,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:13:01,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069976932] [2023-11-29 00:13:01,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:13:01,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:13:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:13:02,208 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:13:02,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:13:02,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069976932] [2023-11-29 00:13:02,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069976932] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:13:02,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430622252] [2023-11-29 00:13:02,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:13:02,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:13:02,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:13:02,210 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:13:02,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6e11b3-2e8d-4a4d-9245-d3235fdc16b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:13:02,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-29 00:13:02,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:13:02,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 00:13:02,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:13:02,866 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 8 treesize of output 1 [2023-11-29 00:13:02,888 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 8 treesize of output 1 [2023-11-29 00:13:02,910 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 8 treesize of output 1 [2023-11-29 00:13:02,949 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 8 treesize of output 1 [2023-11-29 00:13:02,987 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 8 treesize of output 1 [2023-11-29 00:13:03,023 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 8 treesize of output 1 [2023-11-29 00:13:03,064 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 8 treesize of output 1 [2023-11-29 00:13:03,102 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 8 treesize of output 1 [2023-11-29 00:13:03,145 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 8 treesize of output 1 [2023-11-29 00:13:03,194 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 8 treesize of output 1 [2023-11-29 00:13:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:13:03,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:13:03,604 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:13:03,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430622252] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:13:03,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:13:03,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 21] total 50 [2023-11-29 00:13:03,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913617461] [2023-11-29 00:13:03,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:13:03,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 00:13:03,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:13:03,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 00:13:03,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=1730, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 00:13:03,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 00:13:03,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 7692 transitions, 139879 flow. Second operand has 51 states, 51 states have (on average 10.176470588235293) internal successors, (519), 51 states have internal predecessors, (519), 0 states have call successors, (0), 0 states 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 00:13:03,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:13:03,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 00:13:03,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand