./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu --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 874fb84f685baf0441a9bf8db1864605baa10908128545fe3028b9b499246108 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:54:44,791 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:54:44,876 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:54:44,883 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:54:44,884 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:54:44,923 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:54:44,924 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:54:44,925 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:54:44,926 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:54:44,932 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:54:44,933 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:54:44,934 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:54:44,935 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:54:44,937 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:54:44,937 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:54:44,938 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:54:44,938 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:54:44,939 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:54:44,939 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:54:44,940 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:54:44,940 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:54:44,944 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:54:44,944 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:54:44,945 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:54:44,945 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:54:44,946 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:54:44,947 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:54:44,947 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:54:44,948 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:54:44,948 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:54:44,950 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:54:44,950 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:54:44,951 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:54:44,951 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:54:44,951 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:54:44,951 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:54:44,952 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:54:44,952 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:54:44,952 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:54:44,953 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_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 874fb84f685baf0441a9bf8db1864605baa10908128545fe3028b9b499246108 [2023-11-19 07:54:45,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:54:45,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:54:45,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:54:45,341 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:54:45,341 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:54:45,343 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread/triangular-longest-2.i [2023-11-19 07:54:48,644 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:54:48,904 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:54:48,905 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/sv-benchmarks/c/pthread/triangular-longest-2.i [2023-11-19 07:54:48,922 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/data/4e902f5bc/976ed7b89f8c44ceb69a9727f5048183/FLAGc1bb96954 [2023-11-19 07:54:48,939 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/data/4e902f5bc/976ed7b89f8c44ceb69a9727f5048183 [2023-11-19 07:54:48,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:54:48,945 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:54:48,946 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:54:48,947 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:54:48,954 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:54:48,955 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:54:48" (1/1) ... [2023-11-19 07:54:48,956 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f7837c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:48, skipping insertion in model container [2023-11-19 07:54:48,956 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:54:48" (1/1) ... [2023-11-19 07:54:49,004 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:54:49,512 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_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/sv-benchmarks/c/pthread/triangular-longest-2.i[30964,30977] [2023-11-19 07:54:49,518 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:54:49,531 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:54:49,580 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_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/sv-benchmarks/c/pthread/triangular-longest-2.i[30964,30977] [2023-11-19 07:54:49,582 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:54:49,636 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:54:49,636 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:54:49,647 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:54:49,647 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:49 WrapperNode [2023-11-19 07:54:49,648 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:54:49,649 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:54:49,649 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:54:49,650 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:54:49,659 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:49" (1/1) ... [2023-11-19 07:54:49,692 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:49" (1/1) ... [2023-11-19 07:54:49,715 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 46 [2023-11-19 07:54:49,716 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:54:49,717 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:54:49,717 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:54:49,717 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:54:49,726 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:49" (1/1) ... [2023-11-19 07:54:49,727 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:49" (1/1) ... [2023-11-19 07:54:49,729 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:49" (1/1) ... [2023-11-19 07:54:49,730 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:49" (1/1) ... [2023-11-19 07:54:49,736 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:49" (1/1) ... [2023-11-19 07:54:49,740 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:49" (1/1) ... [2023-11-19 07:54:49,742 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:49" (1/1) ... [2023-11-19 07:54:49,743 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:49" (1/1) ... [2023-11-19 07:54:49,747 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:54:49,748 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:54:49,748 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:54:49,748 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:54:49,749 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:49" (1/1) ... [2023-11-19 07:54:49,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:54:49,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:49,789 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:54:49,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:54:49,826 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-19 07:54:49,827 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-19 07:54:49,827 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-19 07:54:49,827 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-19 07:54:49,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:54:49,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:54:49,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:54:49,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:54:49,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:54:49,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:54:49,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:54:49,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:54:49,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:54:49,833 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:54:49,985 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:54:49,988 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:54:50,211 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:54:50,221 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:54:50,222 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:54:50,226 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:54:50 BoogieIcfgContainer [2023-11-19 07:54:50,226 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:54:50,230 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:54:50,230 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:54:50,234 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:54:50,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:54:48" (1/3) ... [2023-11-19 07:54:50,236 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f6ea549 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:54:50, skipping insertion in model container [2023-11-19 07:54:50,236 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:49" (2/3) ... [2023-11-19 07:54:50,236 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f6ea549 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:54:50, skipping insertion in model container [2023-11-19 07:54:50,237 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:54:50" (3/3) ... [2023-11-19 07:54:50,239 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2023-11-19 07:54:50,250 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:54:50,264 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:54:50,264 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:54:50,264 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:54:50,332 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:54:50,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 69 transitions, 146 flow [2023-11-19 07:54:50,431 INFO L124 PetriNetUnfolderBase]: 5/67 cut-off events. [2023-11-19 07:54:50,432 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:54:50,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 67 events. 5/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2023-11-19 07:54:50,439 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 69 transitions, 146 flow [2023-11-19 07:54:50,444 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 67 transitions, 140 flow [2023-11-19 07:54:50,468 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:54:50,524 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 67 transitions, 140 flow [2023-11-19 07:54:50,536 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 67 transitions, 140 flow [2023-11-19 07:54:50,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 67 transitions, 140 flow [2023-11-19 07:54:50,580 INFO L124 PetriNetUnfolderBase]: 5/67 cut-off events. [2023-11-19 07:54:50,581 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:54:50,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 67 events. 5/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2023-11-19 07:54:50,586 INFO L119 LiptonReduction]: Number of co-enabled transitions 1296 [2023-11-19 07:54:53,365 INFO L134 LiptonReduction]: Checked pairs total: 1192 [2023-11-19 07:54:53,365 INFO L136 LiptonReduction]: Total number of compositions: 62 [2023-11-19 07:54:53,383 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:54:53,391 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;@3cc968a4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:54:53,391 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:54:53,396 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:54:53,396 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2023-11-19 07:54:53,396 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:54:53,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:53,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:54:53,398 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:54:53,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:53,404 INFO L85 PathProgramCache]: Analyzing trace with hash -425197577, now seen corresponding path program 1 times [2023-11-19 07:54:53,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:53,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716085745] [2023-11-19 07:54:53,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:53,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:53,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:53,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716085745] [2023-11-19 07:54:53,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716085745] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:53,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:53,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:54:53,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891814134] [2023-11-19 07:54:53,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:53,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:54:53,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:54,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:54:54,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:54:54,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 131 [2023-11-19 07:54:54,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 4 states, 4 states have (on average 57.5) internal successors, (230), 4 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:54,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:54,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 131 [2023-11-19 07:54:54,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:54,227 INFO L124 PetriNetUnfolderBase]: 94/152 cut-off events. [2023-11-19 07:54:54,228 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:54:54,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 152 events. 94/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 384 event pairs, 23 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 306. Up to 76 conditions per place. [2023-11-19 07:54:54,234 INFO L140 encePairwiseOnDemand]: 125/131 looper letters, 18 selfloop transitions, 4 changer transitions 4/26 dead transitions. [2023-11-19 07:54:54,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 26 transitions, 110 flow [2023-11-19 07:54:54,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:54:54,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:54:54,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 253 transitions. [2023-11-19 07:54:54,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48282442748091603 [2023-11-19 07:54:54,260 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 253 transitions. [2023-11-19 07:54:54,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 253 transitions. [2023-11-19 07:54:54,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:54,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 253 transitions. [2023-11-19 07:54:54,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:54,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 131.0) internal successors, (655), 5 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:54,278 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 131.0) internal successors, (655), 5 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:54,279 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 4 states and 253 transitions. [2023-11-19 07:54:54,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 26 transitions, 110 flow [2023-11-19 07:54:54,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 26 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:54:54,285 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 53 flow [2023-11-19 07:54:54,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=53, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2023-11-19 07:54:54,291 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 3 predicate places. [2023-11-19 07:54:54,291 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 53 flow [2023-11-19 07:54:54,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 4 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:54,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:54,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:54,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:54:54,292 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:54:54,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:54,293 INFO L85 PathProgramCache]: Analyzing trace with hash -593367787, now seen corresponding path program 1 times [2023-11-19 07:54:54,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:54,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035589735] [2023-11-19 07:54:54,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:54,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:54,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:54,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035589735] [2023-11-19 07:54:54,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035589735] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:54,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:54,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:54:54,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134786347] [2023-11-19 07:54:54,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:54,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:54:54,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:54,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:54:54,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:54:54,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-19 07:54:54,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 53 flow. Second operand has 5 states, 5 states have (on average 56.6) internal successors, (283), 5 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:54,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:54,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-19 07:54:54,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:54,748 INFO L124 PetriNetUnfolderBase]: 126/217 cut-off events. [2023-11-19 07:54:54,748 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2023-11-19 07:54:54,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 217 events. 126/217 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 658 event pairs, 19 based on Foata normal form. 10/191 useless extension candidates. Maximal degree in co-relation 535. Up to 89 conditions per place. [2023-11-19 07:54:54,755 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 33 selfloop transitions, 9 changer transitions 0/42 dead transitions. [2023-11-19 07:54:54,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 215 flow [2023-11-19 07:54:54,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:54:54,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:54:54,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 368 transitions. [2023-11-19 07:54:54,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681933842239186 [2023-11-19 07:54:54,762 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 368 transitions. [2023-11-19 07:54:54,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 368 transitions. [2023-11-19 07:54:54,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:54,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 368 transitions. [2023-11-19 07:54:54,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.333333333333336) internal successors, (368), 6 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:54,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 131.0) internal successors, (917), 7 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:54,775 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 131.0) internal successors, (917), 7 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:54,776 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 53 flow. Second operand 6 states and 368 transitions. [2023-11-19 07:54:54,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 215 flow [2023-11-19 07:54:54,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 42 transitions, 215 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:54:54,779 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 134 flow [2023-11-19 07:54:54,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2023-11-19 07:54:54,782 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 11 predicate places. [2023-11-19 07:54:54,783 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 134 flow [2023-11-19 07:54:54,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.6) internal successors, (283), 5 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:54,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:54,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:54,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:54:54,792 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:54:54,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:54,797 INFO L85 PathProgramCache]: Analyzing trace with hash -593353837, now seen corresponding path program 2 times [2023-11-19 07:54:54,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:54,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002136740] [2023-11-19 07:54:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:54,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:54,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:54,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:54,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002136740] [2023-11-19 07:54:54,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002136740] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:54,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:54,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:54:54,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54823964] [2023-11-19 07:54:54,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:54,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:54:54,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:54,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:54:54,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:54:54,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-19 07:54:54,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 56.6) internal successors, (283), 5 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:54,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:54,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-19 07:54:54,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:55,108 INFO L124 PetriNetUnfolderBase]: 114/199 cut-off events. [2023-11-19 07:54:55,109 INFO L125 PetriNetUnfolderBase]: For 280/280 co-relation queries the response was YES. [2023-11-19 07:54:55,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 199 events. 114/199 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 618 event pairs, 19 based on Foata normal form. 10/209 useless extension candidates. Maximal degree in co-relation 636. Up to 84 conditions per place. [2023-11-19 07:54:55,111 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 29 selfloop transitions, 9 changer transitions 4/42 dead transitions. [2023-11-19 07:54:55,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 42 transitions, 284 flow [2023-11-19 07:54:55,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:54:55,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:54:55,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 308 transitions. [2023-11-19 07:54:55,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47022900763358777 [2023-11-19 07:54:55,114 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 308 transitions. [2023-11-19 07:54:55,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 308 transitions. [2023-11-19 07:54:55,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:55,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 308 transitions. [2023-11-19 07:54:55,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,118 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,119 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 134 flow. Second operand 5 states and 308 transitions. [2023-11-19 07:54:55,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 42 transitions, 284 flow [2023-11-19 07:54:55,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 42 transitions, 282 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-19 07:54:55,124 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 182 flow [2023-11-19 07:54:55,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=182, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2023-11-19 07:54:55,125 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 17 predicate places. [2023-11-19 07:54:55,125 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 182 flow [2023-11-19 07:54:55,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.6) internal successors, (283), 5 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:55,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:55,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:54:55,126 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:54:55,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:55,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1274942511, now seen corresponding path program 1 times [2023-11-19 07:54:55,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:55,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025555036] [2023-11-19 07:54:55,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:55,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:55,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:55,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:55,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:55,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025555036] [2023-11-19 07:54:55,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025555036] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:55,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:55,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:54:55,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3579921] [2023-11-19 07:54:55,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:55,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:54:55,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:55,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:54:55,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:54:55,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-19 07:54:55,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 182 flow. Second operand has 6 states, 6 states have (on average 56.666666666666664) internal successors, (340), 6 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:55,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-19 07:54:55,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:55,431 INFO L124 PetriNetUnfolderBase]: 136/239 cut-off events. [2023-11-19 07:54:55,432 INFO L125 PetriNetUnfolderBase]: For 571/571 co-relation queries the response was YES. [2023-11-19 07:54:55,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 239 events. 136/239 cut-off events. For 571/571 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 795 event pairs, 31 based on Foata normal form. 4/243 useless extension candidates. Maximal degree in co-relation 842. Up to 101 conditions per place. [2023-11-19 07:54:55,434 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 30 selfloop transitions, 16 changer transitions 8/54 dead transitions. [2023-11-19 07:54:55,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 54 transitions, 419 flow [2023-11-19 07:54:55,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:54:55,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:54:55,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 426 transitions. [2023-11-19 07:54:55,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46455834242093785 [2023-11-19 07:54:55,438 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 426 transitions. [2023-11-19 07:54:55,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 426 transitions. [2023-11-19 07:54:55,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:55,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 426 transitions. [2023-11-19 07:54:55,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 60.857142857142854) internal successors, (426), 7 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,444 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,444 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 182 flow. Second operand 7 states and 426 transitions. [2023-11-19 07:54:55,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 54 transitions, 419 flow [2023-11-19 07:54:55,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 54 transitions, 379 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-11-19 07:54:55,450 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 269 flow [2023-11-19 07:54:55,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=269, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2023-11-19 07:54:55,451 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 22 predicate places. [2023-11-19 07:54:55,452 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 269 flow [2023-11-19 07:54:55,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.666666666666664) internal successors, (340), 6 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:55,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:55,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:54:55,453 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:54:55,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:55,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1275101541, now seen corresponding path program 2 times [2023-11-19 07:54:55,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:55,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456389320] [2023-11-19 07:54:55,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:55,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:55,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:55,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456389320] [2023-11-19 07:54:55,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456389320] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:55,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:55,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:54:55,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968618114] [2023-11-19 07:54:55,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:55,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:54:55,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:55,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:54:55,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:54:55,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-19 07:54:55,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 269 flow. Second operand has 6 states, 6 states have (on average 56.666666666666664) internal successors, (340), 6 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:55,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-19 07:54:55,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:55,825 INFO L124 PetriNetUnfolderBase]: 172/303 cut-off events. [2023-11-19 07:54:55,825 INFO L125 PetriNetUnfolderBase]: For 827/827 co-relation queries the response was YES. [2023-11-19 07:54:55,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1151 conditions, 303 events. 172/303 cut-off events. For 827/827 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1068 event pairs, 18 based on Foata normal form. 8/311 useless extension candidates. Maximal degree in co-relation 1127. Up to 79 conditions per place. [2023-11-19 07:54:55,830 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 38 selfloop transitions, 22 changer transitions 3/63 dead transitions. [2023-11-19 07:54:55,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 63 transitions, 519 flow [2023-11-19 07:54:55,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:54:55,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:54:55,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 486 transitions. [2023-11-19 07:54:55,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4637404580152672 [2023-11-19 07:54:55,834 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 486 transitions. [2023-11-19 07:54:55,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 486 transitions. [2023-11-19 07:54:55,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:55,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 486 transitions. [2023-11-19 07:54:55,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 60.75) internal successors, (486), 8 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 131.0) internal successors, (1179), 9 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,841 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 131.0) internal successors, (1179), 9 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,841 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 269 flow. Second operand 8 states and 486 transitions. [2023-11-19 07:54:55,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 63 transitions, 519 flow [2023-11-19 07:54:55,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 63 transitions, 495 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-11-19 07:54:55,849 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 375 flow [2023-11-19 07:54:55,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=375, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2023-11-19 07:54:55,852 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 32 predicate places. [2023-11-19 07:54:55,852 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 375 flow [2023-11-19 07:54:55,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.666666666666664) internal successors, (340), 6 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:55,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:55,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:54:55,854 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:54:55,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:55,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1305502311, now seen corresponding path program 3 times [2023-11-19 07:54:55,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:55,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475130117] [2023-11-19 07:54:55,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:55,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:55,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:56,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:56,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475130117] [2023-11-19 07:54:56,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475130117] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:56,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:56,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:54:56,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074710899] [2023-11-19 07:54:56,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:56,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:54:56,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:56,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:54:56,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:54:56,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-19 07:54:56,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 375 flow. Second operand has 6 states, 6 states have (on average 56.666666666666664) internal successors, (340), 6 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:56,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:56,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-19 07:54:56,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:56,220 INFO L124 PetriNetUnfolderBase]: 160/283 cut-off events. [2023-11-19 07:54:56,220 INFO L125 PetriNetUnfolderBase]: For 1348/1348 co-relation queries the response was YES. [2023-11-19 07:54:56,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1266 conditions, 283 events. 160/283 cut-off events. For 1348/1348 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 987 event pairs, 22 based on Foata normal form. 8/291 useless extension candidates. Maximal degree in co-relation 1237. Up to 69 conditions per place. [2023-11-19 07:54:56,224 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 30 selfloop transitions, 22 changer transitions 8/60 dead transitions. [2023-11-19 07:54:56,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 60 transitions, 601 flow [2023-11-19 07:54:56,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:54:56,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:54:56,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 425 transitions. [2023-11-19 07:54:56,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46346782988004365 [2023-11-19 07:54:56,228 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 425 transitions. [2023-11-19 07:54:56,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 425 transitions. [2023-11-19 07:54:56,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:56,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 425 transitions. [2023-11-19 07:54:56,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 60.714285714285715) internal successors, (425), 7 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:56,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:56,234 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:56,234 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 375 flow. Second operand 7 states and 425 transitions. [2023-11-19 07:54:56,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 60 transitions, 601 flow [2023-11-19 07:54:56,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 567 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-11-19 07:54:56,247 INFO L231 Difference]: Finished difference. Result has 55 places, 41 transitions, 427 flow [2023-11-19 07:54:56,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=427, PETRI_PLACES=55, PETRI_TRANSITIONS=41} [2023-11-19 07:54:56,248 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 37 predicate places. [2023-11-19 07:54:56,249 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 41 transitions, 427 flow [2023-11-19 07:54:56,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.666666666666664) internal successors, (340), 6 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:56,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:56,250 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:56,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:54:56,250 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:54:56,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:56,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1815886077, now seen corresponding path program 4 times [2023-11-19 07:54:56,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:56,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981069822] [2023-11-19 07:54:56,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:56,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:56,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:56,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:56,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981069822] [2023-11-19 07:54:56,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981069822] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:56,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295554573] [2023-11-19 07:54:56,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:54:56,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:56,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:56,411 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:56,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:54:56,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:54:56,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:56,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:54:56,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:56,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:56,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:56,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:56,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295554573] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:56,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:56,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-19 07:54:56,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148107146] [2023-11-19 07:54:56,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:56,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:54:56,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:56,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:54:56,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:54:57,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-19 07:54:57,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 41 transitions, 427 flow. Second operand has 12 states, 12 states have (on average 56.916666666666664) internal successors, (683), 12 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:57,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:57,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-19 07:54:57,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:57,429 INFO L124 PetriNetUnfolderBase]: 208/363 cut-off events. [2023-11-19 07:54:57,430 INFO L125 PetriNetUnfolderBase]: For 2341/2341 co-relation queries the response was YES. [2023-11-19 07:54:57,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1744 conditions, 363 events. 208/363 cut-off events. For 2341/2341 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1270 event pairs, 18 based on Foata normal form. 16/379 useless extension candidates. Maximal degree in co-relation 1713. Up to 90 conditions per place. [2023-11-19 07:54:57,435 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 34 selfloop transitions, 37 changer transitions 22/93 dead transitions. [2023-11-19 07:54:57,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 93 transitions, 989 flow [2023-11-19 07:54:57,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:54:57,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 07:54:57,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 844 transitions. [2023-11-19 07:54:57,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.460196292257361 [2023-11-19 07:54:57,441 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 844 transitions. [2023-11-19 07:54:57,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 844 transitions. [2023-11-19 07:54:57,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:57,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 844 transitions. [2023-11-19 07:54:57,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 60.285714285714285) internal successors, (844), 14 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:57,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 131.0) internal successors, (1965), 15 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:57,452 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 131.0) internal successors, (1965), 15 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:57,452 INFO L175 Difference]: Start difference. First operand has 55 places, 41 transitions, 427 flow. Second operand 14 states and 844 transitions. [2023-11-19 07:54:57,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 93 transitions, 989 flow [2023-11-19 07:54:57,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 93 transitions, 927 flow, removed 14 selfloop flow, removed 5 redundant places. [2023-11-19 07:54:57,468 INFO L231 Difference]: Finished difference. Result has 68 places, 57 transitions, 735 flow [2023-11-19 07:54:57,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=735, PETRI_PLACES=68, PETRI_TRANSITIONS=57} [2023-11-19 07:54:57,469 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 50 predicate places. [2023-11-19 07:54:57,470 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 57 transitions, 735 flow [2023-11-19 07:54:57,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 56.916666666666664) internal successors, (683), 12 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:57,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:57,471 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:57,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:57,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:54:57,688 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:54:57,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:57,688 INFO L85 PathProgramCache]: Analyzing trace with hash 173906857, now seen corresponding path program 5 times [2023-11-19 07:54:57,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:57,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291932406] [2023-11-19 07:54:57,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:57,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:57,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:57,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291932406] [2023-11-19 07:54:57,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291932406] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:57,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659216785] [2023-11-19 07:54:57,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:54:57,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:57,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:57,972 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:57,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:54:58,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-19 07:54:58,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:58,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:54:58,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:58,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:58,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:58,376 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:58,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659216785] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:58,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:58,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-19 07:54:58,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277484360] [2023-11-19 07:54:58,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:58,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:54:58,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:58,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:54:58,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:54:58,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-19 07:54:58,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 57 transitions, 735 flow. Second operand has 16 states, 16 states have (on average 56.75) internal successors, (908), 16 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:58,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:58,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-19 07:54:58,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:58,920 INFO L124 PetriNetUnfolderBase]: 264/475 cut-off events. [2023-11-19 07:54:58,920 INFO L125 PetriNetUnfolderBase]: For 4865/4865 co-relation queries the response was YES. [2023-11-19 07:54:58,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2527 conditions, 475 events. 264/475 cut-off events. For 4865/4865 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1736 event pairs, 55 based on Foata normal form. 32/507 useless extension candidates. Maximal degree in co-relation 2491. Up to 249 conditions per place. [2023-11-19 07:54:58,928 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 65 selfloop transitions, 27 changer transitions 27/119 dead transitions. [2023-11-19 07:54:58,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 119 transitions, 1505 flow [2023-11-19 07:54:58,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 07:54:58,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-19 07:54:58,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 963 transitions. [2023-11-19 07:54:58,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4594465648854962 [2023-11-19 07:54:58,935 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 963 transitions. [2023-11-19 07:54:58,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 963 transitions. [2023-11-19 07:54:58,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:58,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 963 transitions. [2023-11-19 07:54:58,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 60.1875) internal successors, (963), 16 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:58,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 131.0) internal successors, (2227), 17 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:58,949 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 131.0) internal successors, (2227), 17 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:58,949 INFO L175 Difference]: Start difference. First operand has 68 places, 57 transitions, 735 flow. Second operand 16 states and 963 transitions. [2023-11-19 07:54:58,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 119 transitions, 1505 flow [2023-11-19 07:54:58,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 119 transitions, 1144 flow, removed 167 selfloop flow, removed 5 redundant places. [2023-11-19 07:54:58,979 INFO L231 Difference]: Finished difference. Result has 88 places, 71 transitions, 813 flow [2023-11-19 07:54:58,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=813, PETRI_PLACES=88, PETRI_TRANSITIONS=71} [2023-11-19 07:54:58,980 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 70 predicate places. [2023-11-19 07:54:58,981 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 71 transitions, 813 flow [2023-11-19 07:54:58,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 56.75) internal successors, (908), 16 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:58,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:58,982 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:59,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:59,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 07:54:59,204 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:54:59,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:59,204 INFO L85 PathProgramCache]: Analyzing trace with hash 118604779, now seen corresponding path program 6 times [2023-11-19 07:54:59,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:59,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449059608] [2023-11-19 07:54:59,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:59,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:59,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:59,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:59,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:59,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449059608] [2023-11-19 07:54:59,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449059608] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:59,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258118478] [2023-11-19 07:54:59,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:54:59,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:59,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:59,392 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:59,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:54:59,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-19 07:54:59,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:59,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:54:59,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:59,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:59,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:59,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258118478] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:59,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:59,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-19 07:54:59,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452750336] [2023-11-19 07:54:59,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:59,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:54:59,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:59,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:54:59,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:54:59,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-19 07:54:59,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 71 transitions, 813 flow. Second operand has 17 states, 17 states have (on average 56.8235294117647) internal successors, (966), 17 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:59,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:59,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-19 07:54:59,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:00,490 INFO L124 PetriNetUnfolderBase]: 418/767 cut-off events. [2023-11-19 07:55:00,490 INFO L125 PetriNetUnfolderBase]: For 12996/12996 co-relation queries the response was YES. [2023-11-19 07:55:00,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4114 conditions, 767 events. 418/767 cut-off events. For 12996/12996 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3413 event pairs, 42 based on Foata normal form. 32/799 useless extension candidates. Maximal degree in co-relation 4069. Up to 230 conditions per place. [2023-11-19 07:55:00,504 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 73 selfloop transitions, 73 changer transitions 37/183 dead transitions. [2023-11-19 07:55:00,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 183 transitions, 2135 flow [2023-11-19 07:55:00,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-19 07:55:00,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-19 07:55:00,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1324 transitions. [2023-11-19 07:55:00,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4594031922276197 [2023-11-19 07:55:00,511 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1324 transitions. [2023-11-19 07:55:00,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1324 transitions. [2023-11-19 07:55:00,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:00,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1324 transitions. [2023-11-19 07:55:00,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 60.18181818181818) internal successors, (1324), 22 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:00,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 131.0) internal successors, (3013), 23 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:00,526 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 131.0) internal successors, (3013), 23 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:00,526 INFO L175 Difference]: Start difference. First operand has 88 places, 71 transitions, 813 flow. Second operand 22 states and 1324 transitions. [2023-11-19 07:55:00,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 183 transitions, 2135 flow [2023-11-19 07:55:00,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 183 transitions, 2040 flow, removed 38 selfloop flow, removed 4 redundant places. [2023-11-19 07:55:00,564 INFO L231 Difference]: Finished difference. Result has 119 places, 109 transitions, 1544 flow [2023-11-19 07:55:00,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=718, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1544, PETRI_PLACES=119, PETRI_TRANSITIONS=109} [2023-11-19 07:55:00,565 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 101 predicate places. [2023-11-19 07:55:00,566 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 109 transitions, 1544 flow [2023-11-19 07:55:00,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.8235294117647) internal successors, (966), 17 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:00,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:00,567 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:00,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:00,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 07:55:00,789 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:55:00,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:00,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1404696555, now seen corresponding path program 7 times [2023-11-19 07:55:00,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:00,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059053620] [2023-11-19 07:55:00,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:00,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:00,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:55:00,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:00,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059053620] [2023-11-19 07:55:00,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059053620] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:00,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975053612] [2023-11-19 07:55:00,967 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:55:00,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:00,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:00,969 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:01,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:55:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:01,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:55:01,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:01,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:55:01,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:55:01,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975053612] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:01,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:01,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-19 07:55:01,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741692217] [2023-11-19 07:55:01,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:01,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:55:01,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:01,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:55:01,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:55:01,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-19 07:55:01,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 109 transitions, 1544 flow. Second operand has 16 states, 16 states have (on average 56.8125) internal successors, (909), 16 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:01,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:01,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-19 07:55:01,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:02,205 INFO L124 PetriNetUnfolderBase]: 618/1123 cut-off events. [2023-11-19 07:55:02,206 INFO L125 PetriNetUnfolderBase]: For 39798/39798 co-relation queries the response was YES. [2023-11-19 07:55:02,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8045 conditions, 1123 events. 618/1123 cut-off events. For 39798/39798 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5469 event pairs, 30 based on Foata normal form. 36/1159 useless extension candidates. Maximal degree in co-relation 7985. Up to 358 conditions per place. [2023-11-19 07:55:02,226 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 71 selfloop transitions, 135 changer transitions 41/247 dead transitions. [2023-11-19 07:55:02,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 247 transitions, 3858 flow [2023-11-19 07:55:02,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-19 07:55:02,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-19 07:55:02,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1625 transitions. [2023-11-19 07:55:02,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45942889454339836 [2023-11-19 07:55:02,238 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1625 transitions. [2023-11-19 07:55:02,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1625 transitions. [2023-11-19 07:55:02,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:02,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1625 transitions. [2023-11-19 07:55:02,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 60.18518518518518) internal successors, (1625), 27 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:02,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 131.0) internal successors, (3668), 28 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:02,261 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 131.0) internal successors, (3668), 28 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:02,262 INFO L175 Difference]: Start difference. First operand has 119 places, 109 transitions, 1544 flow. Second operand 27 states and 1625 transitions. [2023-11-19 07:55:02,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 247 transitions, 3858 flow [2023-11-19 07:55:02,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 247 transitions, 3530 flow, removed 154 selfloop flow, removed 4 redundant places. [2023-11-19 07:55:02,403 INFO L231 Difference]: Finished difference. Result has 156 places, 159 transitions, 2707 flow [2023-11-19 07:55:02,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=1302, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2707, PETRI_PLACES=156, PETRI_TRANSITIONS=159} [2023-11-19 07:55:02,405 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 138 predicate places. [2023-11-19 07:55:02,405 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 159 transitions, 2707 flow [2023-11-19 07:55:02,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 56.8125) internal successors, (909), 16 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:02,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:02,406 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:02,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:02,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:02,624 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:55:02,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:02,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1794307131, now seen corresponding path program 8 times [2023-11-19 07:55:02,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:02,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166810365] [2023-11-19 07:55:02,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:02,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:55:02,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:02,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166810365] [2023-11-19 07:55:02,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166810365] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:02,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581872186] [2023-11-19 07:55:02,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:55:02,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:02,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:02,857 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:02,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:55:02,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:55:02,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:02,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:55:02,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:03,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:55:03,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:55:03,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581872186] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:03,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:03,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-11-19 07:55:03,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69617253] [2023-11-19 07:55:03,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:03,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:55:03,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:03,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:55:03,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:55:03,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-19 07:55:03,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 159 transitions, 2707 flow. Second operand has 18 states, 18 states have (on average 56.72222222222222) internal successors, (1021), 18 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:03,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:03,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-19 07:55:03,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:04,363 INFO L124 PetriNetUnfolderBase]: 762/1387 cut-off events. [2023-11-19 07:55:04,363 INFO L125 PetriNetUnfolderBase]: For 89091/89091 co-relation queries the response was YES. [2023-11-19 07:55:04,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12811 conditions, 1387 events. 762/1387 cut-off events. For 89091/89091 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6965 event pairs, 20 based on Foata normal form. 40/1427 useless extension candidates. Maximal degree in co-relation 12737. Up to 461 conditions per place. [2023-11-19 07:55:04,390 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 60 selfloop transitions, 175 changer transitions 50/285 dead transitions. [2023-11-19 07:55:04,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 285 transitions, 6098 flow [2023-11-19 07:55:04,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-19 07:55:04,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-19 07:55:04,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1681 transitions. [2023-11-19 07:55:04,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45828789531079606 [2023-11-19 07:55:04,400 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1681 transitions. [2023-11-19 07:55:04,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1681 transitions. [2023-11-19 07:55:04,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:04,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1681 transitions. [2023-11-19 07:55:04,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 60.035714285714285) internal successors, (1681), 28 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:04,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 131.0) internal successors, (3799), 29 states have internal predecessors, (3799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:04,426 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 131.0) internal successors, (3799), 29 states have internal predecessors, (3799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:04,427 INFO L175 Difference]: Start difference. First operand has 156 places, 159 transitions, 2707 flow. Second operand 28 states and 1681 transitions. [2023-11-19 07:55:04,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 285 transitions, 6098 flow [2023-11-19 07:55:04,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 285 transitions, 4641 flow, removed 699 selfloop flow, removed 11 redundant places. [2023-11-19 07:55:04,715 INFO L231 Difference]: Finished difference. Result has 187 places, 203 transitions, 3574 flow [2023-11-19 07:55:04,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=2058, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3574, PETRI_PLACES=187, PETRI_TRANSITIONS=203} [2023-11-19 07:55:04,717 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 169 predicate places. [2023-11-19 07:55:04,717 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 203 transitions, 3574 flow [2023-11-19 07:55:04,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.72222222222222) internal successors, (1021), 18 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:04,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:04,718 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:04,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:04,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:04,932 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:55:04,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:04,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1737774541, now seen corresponding path program 9 times [2023-11-19 07:55:04,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:04,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292656934] [2023-11-19 07:55:04,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:04,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:04,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:05,257 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:05,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:05,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292656934] [2023-11-19 07:55:05,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292656934] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:05,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977887189] [2023-11-19 07:55:05,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:55:05,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:05,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:05,260 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:05,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:55:05,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-19 07:55:05,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:05,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 07:55:05,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:05,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:05,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977887189] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:05,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:05,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2023-11-19 07:55:05,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964474680] [2023-11-19 07:55:05,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:05,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-19 07:55:05,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:05,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-19 07:55:05,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2023-11-19 07:55:05,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-19 07:55:05,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 203 transitions, 3574 flow. Second operand has 30 states, 30 states have (on average 56.36666666666667) internal successors, (1691), 30 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:05,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:05,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-19 07:55:05,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:08,137 INFO L124 PetriNetUnfolderBase]: 946/1695 cut-off events. [2023-11-19 07:55:08,138 INFO L125 PetriNetUnfolderBase]: For 124441/124441 co-relation queries the response was YES. [2023-11-19 07:55:08,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16748 conditions, 1695 events. 946/1695 cut-off events. For 124441/124441 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8076 event pairs, 18 based on Foata normal form. 52/1747 useless extension candidates. Maximal degree in co-relation 16661. Up to 577 conditions per place. [2023-11-19 07:55:08,170 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 90 selfloop transitions, 223 changer transitions 98/411 dead transitions. [2023-11-19 07:55:08,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 411 transitions, 8997 flow [2023-11-19 07:55:08,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-19 07:55:08,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-11-19 07:55:08,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3118 transitions. [2023-11-19 07:55:08,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577216676453318 [2023-11-19 07:55:08,180 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3118 transitions. [2023-11-19 07:55:08,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3118 transitions. [2023-11-19 07:55:08,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:08,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3118 transitions. [2023-11-19 07:55:08,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 59.96153846153846) internal successors, (3118), 52 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:08,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 131.0) internal successors, (6943), 53 states have internal predecessors, (6943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:08,210 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 131.0) internal successors, (6943), 53 states have internal predecessors, (6943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:08,210 INFO L175 Difference]: Start difference. First operand has 187 places, 203 transitions, 3574 flow. Second operand 52 states and 3118 transitions. [2023-11-19 07:55:08,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 411 transitions, 8997 flow [2023-11-19 07:55:08,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 411 transitions, 8099 flow, removed 423 selfloop flow, removed 6 redundant places. [2023-11-19 07:55:08,583 INFO L231 Difference]: Finished difference. Result has 258 places, 249 transitions, 5234 flow [2023-11-19 07:55:08,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=3000, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=5234, PETRI_PLACES=258, PETRI_TRANSITIONS=249} [2023-11-19 07:55:08,586 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 240 predicate places. [2023-11-19 07:55:08,587 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 249 transitions, 5234 flow [2023-11-19 07:55:08,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 56.36666666666667) internal successors, (1691), 30 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:08,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:08,588 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:08,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:08,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:08,811 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:55:08,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:08,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1210806945, now seen corresponding path program 10 times [2023-11-19 07:55:08,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:08,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571310187] [2023-11-19 07:55:08,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:08,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:09,571 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:09,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:09,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571310187] [2023-11-19 07:55:09,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571310187] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:09,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611221366] [2023-11-19 07:55:09,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:55:09,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:09,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:09,573 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:09,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:55:09,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:55:09,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:09,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-19 07:55:09,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:09,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:10,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611221366] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:10,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:10,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-11-19 07:55:10,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625516486] [2023-11-19 07:55:10,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:10,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-19 07:55:10,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:10,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-19 07:55:10,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2023-11-19 07:55:10,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-19 07:55:10,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 249 transitions, 5234 flow. Second operand has 50 states, 50 states have (on average 56.2) internal successors, (2810), 50 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:10,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:10,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-19 07:55:10,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:14,008 INFO L124 PetriNetUnfolderBase]: 1306/2415 cut-off events. [2023-11-19 07:55:14,008 INFO L125 PetriNetUnfolderBase]: For 336748/336748 co-relation queries the response was YES. [2023-11-19 07:55:14,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32144 conditions, 2415 events. 1306/2415 cut-off events. For 336748/336748 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 12206 event pairs, 236 based on Foata normal form. 72/2487 useless extension candidates. Maximal degree in co-relation 32030. Up to 993 conditions per place. [2023-11-19 07:55:14,070 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 219 selfloop transitions, 180 changer transitions 103/502 dead transitions. [2023-11-19 07:55:14,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 502 transitions, 14529 flow [2023-11-19 07:55:14,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-19 07:55:14,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-11-19 07:55:14,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3217 transitions. [2023-11-19 07:55:14,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476392422957307 [2023-11-19 07:55:14,081 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3217 transitions. [2023-11-19 07:55:14,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3217 transitions. [2023-11-19 07:55:14,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:14,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3217 transitions. [2023-11-19 07:55:14,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 59.574074074074076) internal successors, (3217), 54 states have internal predecessors, (3217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:14,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 131.0) internal successors, (7205), 55 states have internal predecessors, (7205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:14,130 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 131.0) internal successors, (7205), 55 states have internal predecessors, (7205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:14,130 INFO L175 Difference]: Start difference. First operand has 258 places, 249 transitions, 5234 flow. Second operand 54 states and 3217 transitions. [2023-11-19 07:55:14,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 502 transitions, 14529 flow [2023-11-19 07:55:15,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 502 transitions, 11228 flow, removed 1572 selfloop flow, removed 16 redundant places. [2023-11-19 07:55:15,431 INFO L231 Difference]: Finished difference. Result has 319 places, 341 transitions, 7010 flow [2023-11-19 07:55:15,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=3819, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=7010, PETRI_PLACES=319, PETRI_TRANSITIONS=341} [2023-11-19 07:55:15,433 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 301 predicate places. [2023-11-19 07:55:15,433 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 341 transitions, 7010 flow [2023-11-19 07:55:15,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 56.2) internal successors, (2810), 50 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:15,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:15,435 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:15,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:15,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 07:55:15,659 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:55:15,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:15,660 INFO L85 PathProgramCache]: Analyzing trace with hash 5881111, now seen corresponding path program 11 times [2023-11-19 07:55:15,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:15,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244820171] [2023-11-19 07:55:15,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:15,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:15,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:16,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:16,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244820171] [2023-11-19 07:55:16,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244820171] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:16,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751171936] [2023-11-19 07:55:16,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:55:16,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:16,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:16,427 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:16,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:55:16,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-11-19 07:55:16,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:16,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-19 07:55:16,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:16,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:17,546 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:17,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751171936] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:17,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:17,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 49 [2023-11-19 07:55:17,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445327068] [2023-11-19 07:55:17,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:17,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-19 07:55:17,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:17,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-19 07:55:17,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=2056, Unknown=0, NotChecked=0, Total=2550 [2023-11-19 07:55:17,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-19 07:55:17,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 341 transitions, 7010 flow. Second operand has 51 states, 51 states have (on average 56.21568627450981) internal successors, (2867), 51 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:17,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:17,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-19 07:55:17,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:21,628 INFO L124 PetriNetUnfolderBase]: 1658/3119 cut-off events. [2023-11-19 07:55:21,629 INFO L125 PetriNetUnfolderBase]: For 752858/752858 co-relation queries the response was YES. [2023-11-19 07:55:21,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46319 conditions, 3119 events. 1658/3119 cut-off events. For 752858/752858 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 16601 event pairs, 114 based on Foata normal form. 72/3191 useless extension candidates. Maximal degree in co-relation 46180. Up to 1269 conditions per place. [2023-11-19 07:55:21,690 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 152 selfloop transitions, 343 changer transitions 115/610 dead transitions. [2023-11-19 07:55:21,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 610 transitions, 16776 flow [2023-11-19 07:55:21,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-19 07:55:21,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-11-19 07:55:21,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3580 transitions. [2023-11-19 07:55:21,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455470737913486 [2023-11-19 07:55:21,699 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3580 transitions. [2023-11-19 07:55:21,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3580 transitions. [2023-11-19 07:55:21,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:21,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3580 transitions. [2023-11-19 07:55:21,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 59.666666666666664) internal successors, (3580), 60 states have internal predecessors, (3580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:21,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 131.0) internal successors, (7991), 61 states have internal predecessors, (7991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:21,723 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 131.0) internal successors, (7991), 61 states have internal predecessors, (7991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:21,723 INFO L175 Difference]: Start difference. First operand has 319 places, 341 transitions, 7010 flow. Second operand 60 states and 3580 transitions. [2023-11-19 07:55:21,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 610 transitions, 16776 flow [2023-11-19 07:55:23,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 610 transitions, 15050 flow, removed 795 selfloop flow, removed 21 redundant places. [2023-11-19 07:55:23,695 INFO L231 Difference]: Finished difference. Result has 379 places, 432 transitions, 9630 flow [2023-11-19 07:55:23,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=5564, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=9630, PETRI_PLACES=379, PETRI_TRANSITIONS=432} [2023-11-19 07:55:23,696 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 361 predicate places. [2023-11-19 07:55:23,696 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 432 transitions, 9630 flow [2023-11-19 07:55:23,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 56.21568627450981) internal successors, (2867), 51 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:23,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:23,698 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:23,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:23,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 07:55:23,920 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:55:23,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:23,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1929493429, now seen corresponding path program 12 times [2023-11-19 07:55:23,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:23,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038765943] [2023-11-19 07:55:23,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:23,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:24,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:24,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038765943] [2023-11-19 07:55:24,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038765943] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:24,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929810315] [2023-11-19 07:55:24,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:55:24,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:24,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:24,418 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:24,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6947e8e3-d2fb-4a9c-9afa-8fc9b9182a69/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:55:24,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-11-19 07:55:24,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:24,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-19 07:55:24,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:24,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:25,328 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:25,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929810315] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:25,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:25,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 49 [2023-11-19 07:55:25,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398139845] [2023-11-19 07:55:25,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:25,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-19 07:55:25,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:25,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-19 07:55:25,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=2093, Unknown=0, NotChecked=0, Total=2550 [2023-11-19 07:55:25,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-19 07:55:25,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 432 transitions, 9630 flow. Second operand has 51 states, 51 states have (on average 56.23529411764706) internal successors, (2868), 51 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:25,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:25,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-19 07:55:25,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:30,432 INFO L124 PetriNetUnfolderBase]: 2018/3755 cut-off events. [2023-11-19 07:55:30,432 INFO L125 PetriNetUnfolderBase]: For 1357894/1357894 co-relation queries the response was YES. [2023-11-19 07:55:30,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66218 conditions, 3755 events. 2018/3755 cut-off events. For 1357894/1357894 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 19957 event pairs, 10 based on Foata normal form. 84/3839 useless extension candidates. Maximal degree in co-relation 66067. Up to 1537 conditions per place. [2023-11-19 07:55:30,507 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 119 selfloop transitions, 493 changer transitions 161/773 dead transitions. [2023-11-19 07:55:30,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 773 transitions, 25658 flow [2023-11-19 07:55:30,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-11-19 07:55:30,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2023-11-19 07:55:30,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 5023 transitions. [2023-11-19 07:55:30,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564703744093057 [2023-11-19 07:55:30,516 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 5023 transitions. [2023-11-19 07:55:30,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 5023 transitions. [2023-11-19 07:55:30,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:30,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 5023 transitions. [2023-11-19 07:55:30,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 59.79761904761905) internal successors, (5023), 84 states have internal predecessors, (5023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:30,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 131.0) internal successors, (11135), 85 states have internal predecessors, (11135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:30,545 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 131.0) internal successors, (11135), 85 states have internal predecessors, (11135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:30,545 INFO L175 Difference]: Start difference. First operand has 379 places, 432 transitions, 9630 flow. Second operand 84 states and 5023 transitions. [2023-11-19 07:55:30,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 773 transitions, 25658 flow