./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:05:51,559 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:05:51,686 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:05:51,691 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:05:51,699 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:05:51,739 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:05:51,740 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:05:51,741 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:05:51,743 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:05:51,748 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:05:51,749 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:05:51,750 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:05:51,750 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:05:51,752 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:05:51,753 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:05:51,753 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:05:51,754 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:05:51,754 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:05:51,754 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:05:51,755 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:05:51,755 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:05:51,756 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:05:51,756 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:05:51,757 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:05:51,757 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:05:51,758 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:05:51,759 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:05:51,759 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:05:51,760 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:05:51,760 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:05:51,761 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:05:51,762 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:05:51,762 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:05:51,762 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:05:51,763 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:05:51,763 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:05:51,763 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:05:51,763 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:05:51,764 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:05:51,764 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_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 [2023-11-06 23:05:52,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:05:52,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:05:52,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:05:52,111 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:05:52,111 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:05:52,113 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2023-11-06 23:05:55,386 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:05:55,632 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:05:55,633 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2023-11-06 23:05:55,642 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/data/508721f55/c9e56fb7d486437a934471eaf730c27a/FLAG5a2d71ea6 [2023-11-06 23:05:55,662 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/data/508721f55/c9e56fb7d486437a934471eaf730c27a [2023-11-06 23:05:55,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:05:55,671 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:05:55,674 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:05:55,675 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:05:55,680 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:05:55,681 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:05:55" (1/1) ... [2023-11-06 23:05:55,682 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f5b067 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:55, skipping insertion in model container [2023-11-06 23:05:55,683 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:05:55" (1/1) ... [2023-11-06 23:05:55,717 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:05:55,955 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_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2023-11-06 23:05:55,978 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:05:55,990 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:05:56,019 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_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2023-11-06 23:05:56,025 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:05:56,043 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:05:56,044 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:56 WrapperNode [2023-11-06 23:05:56,044 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:05:56,046 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:05:56,047 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:05:56,047 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:05:56,059 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:56" (1/1) ... [2023-11-06 23:05:56,067 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:56" (1/1) ... [2023-11-06 23:05:56,093 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 117 [2023-11-06 23:05:56,093 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:05:56,094 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:05:56,094 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:05:56,094 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:05:56,104 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:56" (1/1) ... [2023-11-06 23:05:56,104 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:56" (1/1) ... [2023-11-06 23:05:56,108 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:56" (1/1) ... [2023-11-06 23:05:56,108 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:56" (1/1) ... [2023-11-06 23:05:56,118 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:56" (1/1) ... [2023-11-06 23:05:56,123 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:56" (1/1) ... [2023-11-06 23:05:56,125 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:56" (1/1) ... [2023-11-06 23:05:56,126 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:56" (1/1) ... [2023-11-06 23:05:56,129 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:05:56,130 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:05:56,131 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:05:56,131 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:05:56,132 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:56" (1/1) ... [2023-11-06 23:05:56,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:05:56,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:56,185 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:05:56,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:05:56,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:05:56,226 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 23:05:56,227 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 23:05:56,227 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 23:05:56,227 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 23:05:56,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:05:56,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:05:56,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:05:56,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 23:05:56,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:05:56,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:05:56,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:05:56,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:05:56,232 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 23:05:56,395 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:05:56,399 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:05:56,785 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:05:56,796 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:05:56,796 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 23:05:56,799 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:05:56 BoogieIcfgContainer [2023-11-06 23:05:56,799 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:05:56,802 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:05:56,803 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:05:56,806 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:05:56,806 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:05:55" (1/3) ... [2023-11-06 23:05:56,807 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f5b6a4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:05:56, skipping insertion in model container [2023-11-06 23:05:56,807 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:56" (2/3) ... [2023-11-06 23:05:56,808 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f5b6a4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:05:56, skipping insertion in model container [2023-11-06 23:05:56,808 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:05:56" (3/3) ... [2023-11-06 23:05:56,809 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2023-11-06 23:05:56,817 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 23:05:56,827 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:05:56,827 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:05:56,827 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:05:56,910 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 23:05:56,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 176 transitions, 366 flow [2023-11-06 23:05:57,041 INFO L124 PetriNetUnfolderBase]: 15/174 cut-off events. [2023-11-06 23:05:57,041 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:05:57,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 174 events. 15/174 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 125 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 133. Up to 3 conditions per place. [2023-11-06 23:05:57,047 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 176 transitions, 366 flow [2023-11-06 23:05:57,054 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 165 transitions, 342 flow [2023-11-06 23:05:57,058 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:05:57,078 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 165 transitions, 342 flow [2023-11-06 23:05:57,081 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 165 transitions, 342 flow [2023-11-06 23:05:57,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 165 transitions, 342 flow [2023-11-06 23:05:57,147 INFO L124 PetriNetUnfolderBase]: 15/165 cut-off events. [2023-11-06 23:05:57,147 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:05:57,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 165 events. 15/165 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 124 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 133. Up to 3 conditions per place. [2023-11-06 23:05:57,151 INFO L119 LiptonReduction]: Number of co-enabled transitions 992 [2023-11-06 23:06:03,588 INFO L134 LiptonReduction]: Checked pairs total: 1299 [2023-11-06 23:06:03,588 INFO L136 LiptonReduction]: Total number of compositions: 180 [2023-11-06 23:06:03,604 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:06:03,612 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=LoopsAndPotentialCycles, 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;@59bfb7a8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:06:03,612 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 23:06:03,619 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:06:03,619 INFO L124 PetriNetUnfolderBase]: 5/18 cut-off events. [2023-11-06 23:06:03,619 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:06:03,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:03,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:03,621 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:03,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:03,626 INFO L85 PathProgramCache]: Analyzing trace with hash -277681995, now seen corresponding path program 1 times [2023-11-06 23:06:03,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:03,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183267092] [2023-11-06 23:06:03,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:03,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:04,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:04,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:04,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183267092] [2023-11-06 23:06:04,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183267092] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:06:04,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:06:04,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:06:04,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673004939] [2023-11-06 23:06:04,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:06:04,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:06:04,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:04,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:06:04,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:06:04,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 356 [2023-11-06 23:06:04,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:04,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:04,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 356 [2023-11-06 23:06:04,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:04,437 INFO L124 PetriNetUnfolderBase]: 71/121 cut-off events. [2023-11-06 23:06:04,438 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-06 23:06:04,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 121 events. 71/121 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 273 event pairs, 15 based on Foata normal form. 1/80 useless extension candidates. Maximal degree in co-relation 204. Up to 73 conditions per place. [2023-11-06 23:06:04,443 INFO L140 encePairwiseOnDemand]: 352/356 looper letters, 27 selfloop transitions, 3 changer transitions 1/31 dead transitions. [2023-11-06 23:06:04,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 31 transitions, 145 flow [2023-11-06 23:06:04,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:06:04,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:06:04,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 512 transitions. [2023-11-06 23:06:04,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4794007490636704 [2023-11-06 23:06:04,471 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 512 transitions. [2023-11-06 23:06:04,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 512 transitions. [2023-11-06 23:06:04,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:04,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 512 transitions. [2023-11-06 23:06:04,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:04,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:04,491 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:04,493 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 50 flow. Second operand 3 states and 512 transitions. [2023-11-06 23:06:04,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 31 transitions, 145 flow [2023-11-06 23:06:04,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 31 transitions, 131 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 23:06:04,500 INFO L231 Difference]: Finished difference. Result has 20 places, 21 transitions, 61 flow [2023-11-06 23:06:04,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=20, PETRI_TRANSITIONS=21} [2023-11-06 23:06:04,506 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-06 23:06:04,506 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 21 transitions, 61 flow [2023-11-06 23:06:04,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:04,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:04,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:04,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:06:04,508 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:04,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:04,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1707352121, now seen corresponding path program 1 times [2023-11-06 23:06:04,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:04,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119672178] [2023-11-06 23:06:04,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:04,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:04,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:04,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:04,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:04,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119672178] [2023-11-06 23:06:04,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119672178] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:06:04,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:06:04,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:06:04,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969473870] [2023-11-06 23:06:04,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:06:04,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:06:04,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:04,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:06:04,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:06:04,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 356 [2023-11-06 23:06:04,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 21 transitions, 61 flow. Second operand has 4 states, 4 states have (on average 149.5) internal successors, (598), 4 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:04,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:04,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 356 [2023-11-06 23:06:04,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:05,109 INFO L124 PetriNetUnfolderBase]: 125/225 cut-off events. [2023-11-06 23:06:05,110 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-06 23:06:05,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 531 conditions, 225 events. 125/225 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 677 event pairs, 71 based on Foata normal form. 16/213 useless extension candidates. Maximal degree in co-relation 200. Up to 122 conditions per place. [2023-11-06 23:06:05,119 INFO L140 encePairwiseOnDemand]: 352/356 looper letters, 36 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-11-06 23:06:05,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 39 transitions, 186 flow [2023-11-06 23:06:05,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:06:05,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:06:05,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 621 transitions. [2023-11-06 23:06:05,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43609550561797755 [2023-11-06 23:06:05,126 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 621 transitions. [2023-11-06 23:06:05,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 621 transitions. [2023-11-06 23:06:05,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:05,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 621 transitions. [2023-11-06 23:06:05,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.25) internal successors, (621), 4 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:05,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 356.0) internal successors, (1780), 5 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:05,137 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 356.0) internal successors, (1780), 5 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:05,137 INFO L175 Difference]: Start difference. First operand has 20 places, 21 transitions, 61 flow. Second operand 4 states and 621 transitions. [2023-11-06 23:06:05,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 39 transitions, 186 flow [2023-11-06 23:06:05,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 39 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:06:05,140 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 80 flow [2023-11-06 23:06:05,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=80, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2023-11-06 23:06:05,141 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2023-11-06 23:06:05,141 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 80 flow [2023-11-06 23:06:05,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.5) internal successors, (598), 4 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:05,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:05,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:05,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:06:05,143 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:05,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:05,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1977729849, now seen corresponding path program 1 times [2023-11-06 23:06:05,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:05,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105950373] [2023-11-06 23:06:05,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:05,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:05,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:05,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:05,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:05,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105950373] [2023-11-06 23:06:05,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105950373] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:06:05,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:06:05,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:06:05,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812874117] [2023-11-06 23:06:05,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:06:05,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:06:05,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:05,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:06:05,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:06:05,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 356 [2023-11-06 23:06:05,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:05,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:05,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 356 [2023-11-06 23:06:05,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:05,539 INFO L124 PetriNetUnfolderBase]: 81/151 cut-off events. [2023-11-06 23:06:05,540 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2023-11-06 23:06:05,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 151 events. 81/151 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 392 event pairs, 45 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 294. Up to 122 conditions per place. [2023-11-06 23:06:05,542 INFO L140 encePairwiseOnDemand]: 352/356 looper letters, 20 selfloop transitions, 2 changer transitions 12/34 dead transitions. [2023-11-06 23:06:05,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 34 transitions, 174 flow [2023-11-06 23:06:05,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:06:05,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:06:05,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 617 transitions. [2023-11-06 23:06:05,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4332865168539326 [2023-11-06 23:06:05,547 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 617 transitions. [2023-11-06 23:06:05,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 617 transitions. [2023-11-06 23:06:05,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:05,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 617 transitions. [2023-11-06 23:06:05,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.25) internal successors, (617), 4 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:05,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 356.0) internal successors, (1780), 5 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:05,556 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 356.0) internal successors, (1780), 5 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:05,557 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 80 flow. Second operand 4 states and 617 transitions. [2023-11-06 23:06:05,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 34 transitions, 174 flow [2023-11-06 23:06:05,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 34 transitions, 168 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-06 23:06:05,560 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 74 flow [2023-11-06 23:06:05,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2023-11-06 23:06:05,561 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 6 predicate places. [2023-11-06 23:06:05,561 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 74 flow [2023-11-06 23:06:05,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:05,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:05,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:05,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:06:05,563 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:05,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:05,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1680791750, now seen corresponding path program 1 times [2023-11-06 23:06:05,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:05,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406575065] [2023-11-06 23:06:05,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:05,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:05,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:06:05,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:05,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406575065] [2023-11-06 23:06:05,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406575065] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:06:05,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:06:05,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:06:05,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892960378] [2023-11-06 23:06:05,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:06:05,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:06:05,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:05,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:06:05,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:06:05,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 356 [2023-11-06 23:06:05,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 74 flow. Second operand has 5 states, 5 states have (on average 148.0) internal successors, (740), 5 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:05,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:05,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 356 [2023-11-06 23:06:05,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:06,020 INFO L124 PetriNetUnfolderBase]: 150/268 cut-off events. [2023-11-06 23:06:06,020 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2023-11-06 23:06:06,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 268 events. 150/268 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 867 event pairs, 70 based on Foata normal form. 16/281 useless extension candidates. Maximal degree in co-relation 639. Up to 106 conditions per place. [2023-11-06 23:06:06,023 INFO L140 encePairwiseOnDemand]: 351/356 looper letters, 43 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2023-11-06 23:06:06,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 49 transitions, 248 flow [2023-11-06 23:06:06,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:06:06,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:06:06,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 771 transitions. [2023-11-06 23:06:06,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43314606741573036 [2023-11-06 23:06:06,031 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 771 transitions. [2023-11-06 23:06:06,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 771 transitions. [2023-11-06 23:06:06,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:06,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 771 transitions. [2023-11-06 23:06:06,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 154.2) internal successors, (771), 5 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:06,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 356.0) internal successors, (2136), 6 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:06,042 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 356.0) internal successors, (2136), 6 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:06,042 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 74 flow. Second operand 5 states and 771 transitions. [2023-11-06 23:06:06,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 49 transitions, 248 flow [2023-11-06 23:06:06,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 49 transitions, 236 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-06 23:06:06,045 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 103 flow [2023-11-06 23:06:06,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-11-06 23:06:06,047 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-11-06 23:06:06,047 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 103 flow [2023-11-06 23:06:06,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.0) internal successors, (740), 5 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:06,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:06,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:06,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 23:06:06,049 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:06,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:06,050 INFO L85 PathProgramCache]: Analyzing trace with hash -750739081, now seen corresponding path program 1 times [2023-11-06 23:06:06,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:06,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774758301] [2023-11-06 23:06:06,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:06,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:06,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:06:06,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:06,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774758301] [2023-11-06 23:06:06,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774758301] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:06,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127090721] [2023-11-06 23:06:06,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:06,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:06,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:06,284 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:06,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:06:06,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:06,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:06:06,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:06:06,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:06:06,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127090721] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:06,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:06:06,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 13 [2023-11-06 23:06:06,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986732307] [2023-11-06 23:06:06,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:06:06,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:06:06,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:06,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:06:06,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:06:06,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 356 [2023-11-06 23:06:06,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 103 flow. Second operand has 6 states, 6 states have (on average 140.66666666666666) internal successors, (844), 6 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) [2023-11-06 23:06:06,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:06,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 356 [2023-11-06 23:06:06,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:07,149 INFO L124 PetriNetUnfolderBase]: 182/363 cut-off events. [2023-11-06 23:06:07,149 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2023-11-06 23:06:07,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 923 conditions, 363 events. 182/363 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1459 event pairs, 50 based on Foata normal form. 0/340 useless extension candidates. Maximal degree in co-relation 900. Up to 117 conditions per place. [2023-11-06 23:06:07,154 INFO L140 encePairwiseOnDemand]: 348/356 looper letters, 43 selfloop transitions, 10 changer transitions 4/57 dead transitions. [2023-11-06 23:06:07,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 57 transitions, 314 flow [2023-11-06 23:06:07,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:06:07,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 23:06:07,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1020 transitions. [2023-11-06 23:06:07,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40930979133226325 [2023-11-06 23:06:07,160 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1020 transitions. [2023-11-06 23:06:07,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1020 transitions. [2023-11-06 23:06:07,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:07,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1020 transitions. [2023-11-06 23:06:07,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 145.71428571428572) internal successors, (1020), 7 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:07,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 356.0) internal successors, (2848), 8 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:07,172 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 356.0) internal successors, (2848), 8 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:07,172 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 103 flow. Second operand 7 states and 1020 transitions. [2023-11-06 23:06:07,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 57 transitions, 314 flow [2023-11-06 23:06:07,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 57 transitions, 308 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 23:06:07,176 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 134 flow [2023-11-06 23:06:07,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=134, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-11-06 23:06:07,177 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2023-11-06 23:06:07,178 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 134 flow [2023-11-06 23:06:07,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 140.66666666666666) internal successors, (844), 6 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) [2023-11-06 23:06:07,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:07,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:07,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:07,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:07,386 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:07,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:07,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1128325220, now seen corresponding path program 1 times [2023-11-06 23:06:07,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:07,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729638012] [2023-11-06 23:06:07,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:07,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:07,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:06:07,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:07,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729638012] [2023-11-06 23:06:07,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729638012] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:06:07,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:06:07,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:06:07,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780911170] [2023-11-06 23:06:07,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:06:07,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:06:07,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:07,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:06:07,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:06:07,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 356 [2023-11-06 23:06:07,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:07,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:07,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 356 [2023-11-06 23:06:07,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:07,779 INFO L124 PetriNetUnfolderBase]: 134/262 cut-off events. [2023-11-06 23:06:07,779 INFO L125 PetriNetUnfolderBase]: For 165/165 co-relation queries the response was YES. [2023-11-06 23:06:07,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 262 events. 134/262 cut-off events. For 165/165 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 857 event pairs, 62 based on Foata normal form. 6/267 useless extension candidates. Maximal degree in co-relation 725. Up to 147 conditions per place. [2023-11-06 23:06:07,782 INFO L140 encePairwiseOnDemand]: 350/356 looper letters, 31 selfloop transitions, 5 changer transitions 10/46 dead transitions. [2023-11-06 23:06:07,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 46 transitions, 276 flow [2023-11-06 23:06:07,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:06:07,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:06:07,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 768 transitions. [2023-11-06 23:06:07,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314606741573034 [2023-11-06 23:06:07,786 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 768 transitions. [2023-11-06 23:06:07,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 768 transitions. [2023-11-06 23:06:07,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:07,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 768 transitions. [2023-11-06 23:06:07,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 153.6) internal successors, (768), 5 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:07,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 356.0) internal successors, (2136), 6 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:07,795 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 356.0) internal successors, (2136), 6 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:07,795 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 134 flow. Second operand 5 states and 768 transitions. [2023-11-06 23:06:07,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 46 transitions, 276 flow [2023-11-06 23:06:07,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 46 transitions, 266 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-06 23:06:07,799 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 125 flow [2023-11-06 23:06:07,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=125, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2023-11-06 23:06:07,800 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-11-06 23:06:07,801 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 125 flow [2023-11-06 23:06:07,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:07,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:07,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:07,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 23:06:07,802 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:07,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:07,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1294656465, now seen corresponding path program 1 times [2023-11-06 23:06:07,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:07,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613034035] [2023-11-06 23:06:07,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:07,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:07,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:08,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:06:08,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:08,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613034035] [2023-11-06 23:06:08,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613034035] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:06:08,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:06:08,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:06:08,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826566028] [2023-11-06 23:06:08,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:06:08,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:06:08,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:08,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:06:08,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:06:08,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 356 [2023-11-06 23:06:08,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 125 flow. Second operand has 7 states, 7 states have (on average 145.42857142857142) internal successors, (1018), 7 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:08,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:08,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 356 [2023-11-06 23:06:08,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:08,740 INFO L124 PetriNetUnfolderBase]: 139/264 cut-off events. [2023-11-06 23:06:08,740 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2023-11-06 23:06:08,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 761 conditions, 264 events. 139/264 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 903 event pairs, 33 based on Foata normal form. 4/267 useless extension candidates. Maximal degree in co-relation 734. Up to 198 conditions per place. [2023-11-06 23:06:08,743 INFO L140 encePairwiseOnDemand]: 349/356 looper letters, 32 selfloop transitions, 10 changer transitions 7/49 dead transitions. [2023-11-06 23:06:08,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 49 transitions, 289 flow [2023-11-06 23:06:08,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:06:08,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:06:08,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 903 transitions. [2023-11-06 23:06:08,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42275280898876405 [2023-11-06 23:06:08,749 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 903 transitions. [2023-11-06 23:06:08,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 903 transitions. [2023-11-06 23:06:08,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:08,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 903 transitions. [2023-11-06 23:06:08,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 150.5) internal successors, (903), 6 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:08,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 356.0) internal successors, (2492), 7 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:08,759 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 356.0) internal successors, (2492), 7 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:08,759 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 125 flow. Second operand 6 states and 903 transitions. [2023-11-06 23:06:08,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 49 transitions, 289 flow [2023-11-06 23:06:08,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 49 transitions, 277 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 23:06:08,762 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 179 flow [2023-11-06 23:06:08,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=179, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2023-11-06 23:06:08,763 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 17 predicate places. [2023-11-06 23:06:08,763 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 179 flow [2023-11-06 23:06:08,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 145.42857142857142) internal successors, (1018), 7 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:08,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:08,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:08,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 23:06:08,765 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:08,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:08,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1251390933, now seen corresponding path program 1 times [2023-11-06 23:06:08,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:08,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461268761] [2023-11-06 23:06:08,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:08,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:09,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:09,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:09,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461268761] [2023-11-06 23:06:09,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461268761] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:09,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624008449] [2023-11-06 23:06:09,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:09,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:09,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:09,476 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:09,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:06:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:09,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 23:06:09,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:09,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:10,044 INFO L322 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-06 23:06:10,045 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 84 [2023-11-06 23:06:10,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:10,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624008449] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:10,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:06:10,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 19 [2023-11-06 23:06:10,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511785118] [2023-11-06 23:06:10,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:06:10,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:06:10,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:10,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:06:10,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-11-06 23:06:10,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 356 [2023-11-06 23:06:10,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 179 flow. Second operand has 8 states, 8 states have (on average 125.125) internal successors, (1001), 8 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:10,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:10,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 356 [2023-11-06 23:06:10,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:11,034 INFO L124 PetriNetUnfolderBase]: 140/267 cut-off events. [2023-11-06 23:06:11,034 INFO L125 PetriNetUnfolderBase]: For 274/274 co-relation queries the response was YES. [2023-11-06 23:06:11,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 861 conditions, 267 events. 140/267 cut-off events. For 274/274 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 924 event pairs, 38 based on Foata normal form. 2/269 useless extension candidates. Maximal degree in co-relation 832. Up to 198 conditions per place. [2023-11-06 23:06:11,037 INFO L140 encePairwiseOnDemand]: 347/356 looper letters, 31 selfloop transitions, 11 changer transitions 8/50 dead transitions. [2023-11-06 23:06:11,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 50 transitions, 357 flow [2023-11-06 23:06:11,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:06:11,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 23:06:11,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1025 transitions. [2023-11-06 23:06:11,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35990168539325845 [2023-11-06 23:06:11,044 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1025 transitions. [2023-11-06 23:06:11,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1025 transitions. [2023-11-06 23:06:11,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:11,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1025 transitions. [2023-11-06 23:06:11,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 128.125) internal successors, (1025), 8 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:11,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 356.0) internal successors, (3204), 9 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:11,056 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 356.0) internal successors, (3204), 9 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:11,057 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 179 flow. Second operand 8 states and 1025 transitions. [2023-11-06 23:06:11,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 50 transitions, 357 flow [2023-11-06 23:06:11,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 50 transitions, 337 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-06 23:06:11,062 INFO L231 Difference]: Finished difference. Result has 45 places, 35 transitions, 220 flow [2023-11-06 23:06:11,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=220, PETRI_PLACES=45, PETRI_TRANSITIONS=35} [2023-11-06 23:06:11,066 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2023-11-06 23:06:11,066 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 35 transitions, 220 flow [2023-11-06 23:06:11,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 125.125) internal successors, (1001), 8 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:11,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:11,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:11,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:11,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 23:06:11,277 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:11,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:11,277 INFO L85 PathProgramCache]: Analyzing trace with hash 604239039, now seen corresponding path program 2 times [2023-11-06 23:06:11,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:11,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297569503] [2023-11-06 23:06:11,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:11,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:11,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:11,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297569503] [2023-11-06 23:06:11,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297569503] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:11,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939081451] [2023-11-06 23:06:11,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:06:11,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:11,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:11,924 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:11,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:06:12,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:06:12,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:12,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 23:06:12,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:12,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:12,550 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-06 23:06:12,550 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-06 23:06:12,582 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-06 23:06:12,582 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-11-06 23:06:12,592 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-06 23:06:12,592 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-11-06 23:06:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:12,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939081451] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:12,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:12,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-06 23:06:12,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202056417] [2023-11-06 23:06:12,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:12,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 23:06:12,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:12,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 23:06:12,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:06:13,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 356 [2023-11-06 23:06:13,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 220 flow. Second operand has 18 states, 18 states have (on average 122.88888888888889) internal successors, (2212), 18 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:13,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:13,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 356 [2023-11-06 23:06:13,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:14,347 INFO L124 PetriNetUnfolderBase]: 161/318 cut-off events. [2023-11-06 23:06:14,347 INFO L125 PetriNetUnfolderBase]: For 328/328 co-relation queries the response was YES. [2023-11-06 23:06:14,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1100 conditions, 318 events. 161/318 cut-off events. For 328/328 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1249 event pairs, 22 based on Foata normal form. 12/330 useless extension candidates. Maximal degree in co-relation 1067. Up to 200 conditions per place. [2023-11-06 23:06:14,351 INFO L140 encePairwiseOnDemand]: 345/356 looper letters, 39 selfloop transitions, 16 changer transitions 1/56 dead transitions. [2023-11-06 23:06:14,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 56 transitions, 407 flow [2023-11-06 23:06:14,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:06:14,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:06:14,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1140 transitions. [2023-11-06 23:06:14,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35580524344569286 [2023-11-06 23:06:14,358 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1140 transitions. [2023-11-06 23:06:14,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1140 transitions. [2023-11-06 23:06:14,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:14,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1140 transitions. [2023-11-06 23:06:14,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 126.66666666666667) internal successors, (1140), 9 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:14,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 356.0) internal successors, (3560), 10 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:14,372 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 356.0) internal successors, (3560), 10 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:14,372 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 220 flow. Second operand 9 states and 1140 transitions. [2023-11-06 23:06:14,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 56 transitions, 407 flow [2023-11-06 23:06:14,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 56 transitions, 392 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-06 23:06:14,376 INFO L231 Difference]: Finished difference. Result has 48 places, 37 transitions, 259 flow [2023-11-06 23:06:14,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=259, PETRI_PLACES=48, PETRI_TRANSITIONS=37} [2023-11-06 23:06:14,378 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 27 predicate places. [2023-11-06 23:06:14,378 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 37 transitions, 259 flow [2023-11-06 23:06:14,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 122.88888888888889) internal successors, (2212), 18 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:14,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:14,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:14,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:14,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:14,587 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:14,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:14,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1683209549, now seen corresponding path program 3 times [2023-11-06 23:06:14,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:14,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095495945] [2023-11-06 23:06:14,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:14,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:15,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:15,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:15,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095495945] [2023-11-06 23:06:15,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095495945] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:15,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48780165] [2023-11-06 23:06:15,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:06:15,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:15,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:15,337 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:15,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:06:15,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 23:06:15,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:15,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 23:06:15,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:15,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:15,915 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-06 23:06:15,915 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-06 23:06:15,945 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-06 23:06:15,945 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-11-06 23:06:15,953 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-06 23:06:15,954 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-11-06 23:06:16,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:16,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48780165] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:16,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:06:16,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 18 [2023-11-06 23:06:16,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707700673] [2023-11-06 23:06:16,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:06:16,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:06:16,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:16,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:06:16,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:06:16,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 356 [2023-11-06 23:06:16,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 37 transitions, 259 flow. Second operand has 8 states, 8 states have (on average 125.125) internal successors, (1001), 8 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:16,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:16,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 356 [2023-11-06 23:06:16,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:16,967 INFO L124 PetriNetUnfolderBase]: 155/296 cut-off events. [2023-11-06 23:06:16,967 INFO L125 PetriNetUnfolderBase]: For 523/523 co-relation queries the response was YES. [2023-11-06 23:06:16,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1116 conditions, 296 events. 155/296 cut-off events. For 523/523 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1075 event pairs, 57 based on Foata normal form. 2/298 useless extension candidates. Maximal degree in co-relation 1083. Up to 232 conditions per place. [2023-11-06 23:06:16,970 INFO L140 encePairwiseOnDemand]: 346/356 looper letters, 31 selfloop transitions, 12 changer transitions 4/47 dead transitions. [2023-11-06 23:06:16,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 47 transitions, 378 flow [2023-11-06 23:06:16,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:06:16,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 23:06:16,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1026 transitions. [2023-11-06 23:06:16,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36025280898876405 [2023-11-06 23:06:16,976 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1026 transitions. [2023-11-06 23:06:16,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1026 transitions. [2023-11-06 23:06:16,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:16,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1026 transitions. [2023-11-06 23:06:16,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 128.25) internal successors, (1026), 8 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:16,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 356.0) internal successors, (3204), 9 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:16,987 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 356.0) internal successors, (3204), 9 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:16,987 INFO L175 Difference]: Start difference. First operand has 48 places, 37 transitions, 259 flow. Second operand 8 states and 1026 transitions. [2023-11-06 23:06:16,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 47 transitions, 378 flow [2023-11-06 23:06:16,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 349 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-11-06 23:06:16,993 INFO L231 Difference]: Finished difference. Result has 50 places, 36 transitions, 250 flow [2023-11-06 23:06:16,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=250, PETRI_PLACES=50, PETRI_TRANSITIONS=36} [2023-11-06 23:06:16,994 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2023-11-06 23:06:16,994 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 36 transitions, 250 flow [2023-11-06 23:06:16,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 125.125) internal successors, (1001), 8 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:16,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:16,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:17,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:17,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 23:06:17,202 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:17,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:17,202 INFO L85 PathProgramCache]: Analyzing trace with hash 74435967, now seen corresponding path program 2 times [2023-11-06 23:06:17,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:17,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221289817] [2023-11-06 23:06:17,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:17,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:17,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:06:17,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:17,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221289817] [2023-11-06 23:06:17,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221289817] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:06:17,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:06:17,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:06:17,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138290065] [2023-11-06 23:06:17,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:06:17,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:06:17,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:17,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:06:17,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:06:17,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 356 [2023-11-06 23:06:17,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 36 transitions, 250 flow. Second operand has 7 states, 7 states have (on average 144.42857142857142) internal successors, (1011), 7 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:17,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:17,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 356 [2023-11-06 23:06:17,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:18,016 INFO L124 PetriNetUnfolderBase]: 158/301 cut-off events. [2023-11-06 23:06:18,016 INFO L125 PetriNetUnfolderBase]: For 507/507 co-relation queries the response was YES. [2023-11-06 23:06:18,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1144 conditions, 301 events. 158/301 cut-off events. For 507/507 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1125 event pairs, 40 based on Foata normal form. 4/305 useless extension candidates. Maximal degree in co-relation 1110. Up to 234 conditions per place. [2023-11-06 23:06:18,020 INFO L140 encePairwiseOnDemand]: 349/356 looper letters, 36 selfloop transitions, 11 changer transitions 1/48 dead transitions. [2023-11-06 23:06:18,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 389 flow [2023-11-06 23:06:18,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:06:18,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:06:18,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 893 transitions. [2023-11-06 23:06:18,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41807116104868913 [2023-11-06 23:06:18,025 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 893 transitions. [2023-11-06 23:06:18,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 893 transitions. [2023-11-06 23:06:18,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:18,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 893 transitions. [2023-11-06 23:06:18,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 148.83333333333334) internal successors, (893), 6 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:18,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 356.0) internal successors, (2492), 7 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:18,034 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 356.0) internal successors, (2492), 7 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:18,035 INFO L175 Difference]: Start difference. First operand has 50 places, 36 transitions, 250 flow. Second operand 6 states and 893 transitions. [2023-11-06 23:06:18,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 389 flow [2023-11-06 23:06:18,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 48 transitions, 365 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 23:06:18,040 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 261 flow [2023-11-06 23:06:18,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=261, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2023-11-06 23:06:18,041 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2023-11-06 23:06:18,041 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 261 flow [2023-11-06 23:06:18,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.42857142857142) internal successors, (1011), 7 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:18,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:18,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:18,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 23:06:18,042 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:18,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:18,043 INFO L85 PathProgramCache]: Analyzing trace with hash -823305567, now seen corresponding path program 3 times [2023-11-06 23:06:18,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:18,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159537430] [2023-11-06 23:06:18,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:18,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:06:18,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:18,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159537430] [2023-11-06 23:06:18,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159537430] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:06:18,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:06:18,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 23:06:18,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198073307] [2023-11-06 23:06:18,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:06:18,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 23:06:18,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:18,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 23:06:18,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:06:19,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 356 [2023-11-06 23:06:19,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 261 flow. Second operand has 9 states, 9 states have (on average 140.88888888888889) internal successors, (1268), 9 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:19,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:19,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 356 [2023-11-06 23:06:19,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:19,368 INFO L124 PetriNetUnfolderBase]: 154/297 cut-off events. [2023-11-06 23:06:19,368 INFO L125 PetriNetUnfolderBase]: For 585/585 co-relation queries the response was YES. [2023-11-06 23:06:19,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1149 conditions, 297 events. 154/297 cut-off events. For 585/585 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1109 event pairs, 41 based on Foata normal form. 4/301 useless extension candidates. Maximal degree in co-relation 1116. Up to 238 conditions per place. [2023-11-06 23:06:19,372 INFO L140 encePairwiseOnDemand]: 350/356 looper letters, 31 selfloop transitions, 9 changer transitions 10/50 dead transitions. [2023-11-06 23:06:19,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 50 transitions, 417 flow [2023-11-06 23:06:19,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:06:19,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:06:19,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 874 transitions. [2023-11-06 23:06:19,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4091760299625468 [2023-11-06 23:06:19,376 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 874 transitions. [2023-11-06 23:06:19,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 874 transitions. [2023-11-06 23:06:19,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:19,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 874 transitions. [2023-11-06 23:06:19,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 145.66666666666666) internal successors, (874), 6 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:19,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 356.0) internal successors, (2492), 7 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:19,384 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 356.0) internal successors, (2492), 7 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:19,385 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 261 flow. Second operand 6 states and 874 transitions. [2023-11-06 23:06:19,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 50 transitions, 417 flow [2023-11-06 23:06:19,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 50 transitions, 395 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 23:06:19,389 INFO L231 Difference]: Finished difference. Result has 51 places, 36 transitions, 263 flow [2023-11-06 23:06:19,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=263, PETRI_PLACES=51, PETRI_TRANSITIONS=36} [2023-11-06 23:06:19,390 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2023-11-06 23:06:19,390 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 36 transitions, 263 flow [2023-11-06 23:06:19,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 140.88888888888889) internal successors, (1268), 9 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:19,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:19,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:19,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 23:06:19,392 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:19,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:19,392 INFO L85 PathProgramCache]: Analyzing trace with hash 884340067, now seen corresponding path program 4 times [2023-11-06 23:06:19,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:19,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892334322] [2023-11-06 23:06:19,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:19,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:20,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:20,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892334322] [2023-11-06 23:06:20,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892334322] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:20,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786327101] [2023-11-06 23:06:20,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:06:20,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:20,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:20,149 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:20,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:06:20,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:06:20,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:20,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 23:06:20,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:20,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:20,486 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 23:06:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:06:20,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:20,774 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~B~0.offset (* c_~i_AB~0 4)))) (let ((.cse0 (forall ((v_ArrVal_273 (Array Int Int)) (~B~0.base Int)) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_273) ~B~0.base) .cse2) |c_thread1Thread1of1ForFork1_#t~mem1|))))) (and (or (< c_~i_BA~0 c_~An~0) .cse0) (forall ((v_ArrVal_273 (Array Int Int)) (~B~0.base Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_273))) (let ((.cse1 (select .cse3 ~B~0.base))) (or (not (= (select .cse1 .cse2) |c_thread1Thread1of1ForFork1_#t~mem1|)) (let ((.cse4 (* c_~i_BA~0 4))) (= (select (select .cse3 c_~A~0.base) (+ c_~A~0.offset .cse4)) (select .cse1 (+ .cse4 c_~B~0.offset)))))))) (or .cse0 (< c_~i_BA~0 c_~Bn~0))))) is different from false [2023-11-06 23:06:20,993 INFO L322 Elim1Store]: treesize reduction 22, result has 88.0 percent of original size [2023-11-06 23:06:20,994 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 251 treesize of output 308 [2023-11-06 23:06:21,041 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:06:21,042 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 150 [2023-11-06 23:06:21,068 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 111 [2023-11-06 23:06:21,093 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 105 [2023-11-06 23:06:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:06:25,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786327101] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:25,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:25,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 18 [2023-11-06 23:06:25,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842169235] [2023-11-06 23:06:25,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:25,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 23:06:25,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:25,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 23:06:25,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=256, Unknown=1, NotChecked=32, Total=342 [2023-11-06 23:06:25,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 356 [2023-11-06 23:06:25,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 36 transitions, 263 flow. Second operand has 19 states, 19 states have (on average 94.0) internal successors, (1786), 19 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:25,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:25,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 356 [2023-11-06 23:06:25,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:26,380 INFO L124 PetriNetUnfolderBase]: 165/319 cut-off events. [2023-11-06 23:06:26,381 INFO L125 PetriNetUnfolderBase]: For 656/656 co-relation queries the response was YES. [2023-11-06 23:06:26,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1244 conditions, 319 events. 165/319 cut-off events. For 656/656 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1224 event pairs, 14 based on Foata normal form. 12/331 useless extension candidates. Maximal degree in co-relation 1210. Up to 213 conditions per place. [2023-11-06 23:06:26,385 INFO L140 encePairwiseOnDemand]: 346/356 looper letters, 36 selfloop transitions, 15 changer transitions 1/52 dead transitions. [2023-11-06 23:06:26,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 52 transitions, 432 flow [2023-11-06 23:06:26,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:06:26,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:06:26,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 873 transitions. [2023-11-06 23:06:26,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27247191011235955 [2023-11-06 23:06:26,391 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 873 transitions. [2023-11-06 23:06:26,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 873 transitions. [2023-11-06 23:06:26,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:26,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 873 transitions. [2023-11-06 23:06:26,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:26,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 356.0) internal successors, (3560), 10 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:26,401 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 356.0) internal successors, (3560), 10 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:26,401 INFO L175 Difference]: Start difference. First operand has 51 places, 36 transitions, 263 flow. Second operand 9 states and 873 transitions. [2023-11-06 23:06:26,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 52 transitions, 432 flow [2023-11-06 23:06:26,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 52 transitions, 417 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-06 23:06:26,406 INFO L231 Difference]: Finished difference. Result has 55 places, 37 transitions, 298 flow [2023-11-06 23:06:26,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=298, PETRI_PLACES=55, PETRI_TRANSITIONS=37} [2023-11-06 23:06:26,408 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 34 predicate places. [2023-11-06 23:06:26,408 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 37 transitions, 298 flow [2023-11-06 23:06:26,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 94.0) internal successors, (1786), 19 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:26,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:26,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:26,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:26,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 23:06:26,615 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:26,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:26,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1006859615, now seen corresponding path program 5 times [2023-11-06 23:06:26,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:26,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084994499] [2023-11-06 23:06:26,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:26,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:26,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:27,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:27,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084994499] [2023-11-06 23:06:27,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084994499] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:27,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780253855] [2023-11-06 23:06:27,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:06:27,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:27,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:27,478 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:27,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:06:27,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:06:27,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:27,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 23:06:27,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:27,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:27,624 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-11-06 23:06:27,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:27,641 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2023-11-06 23:06:27,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:27,652 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-11-06 23:06:27,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:27,724 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-06 23:06:27,725 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-06 23:06:28,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:28,187 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 23:06:28,187 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 18 [2023-11-06 23:06:28,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:06:28,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:28,549 INFO L322 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-06 23:06:28,549 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 130 treesize of output 147 [2023-11-06 23:06:28,576 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:06:28,577 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 62 [2023-11-06 23:06:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:06:29,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780253855] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:29,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:29,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2023-11-06 23:06:29,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889740034] [2023-11-06 23:06:29,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:29,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 23:06:29,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:29,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 23:06:29,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=390, Unknown=2, NotChecked=0, Total=462 [2023-11-06 23:06:29,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 356 [2023-11-06 23:06:29,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 37 transitions, 298 flow. Second operand has 22 states, 22 states have (on average 87.95454545454545) internal successors, (1935), 22 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:29,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:29,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 356 [2023-11-06 23:06:29,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:30,647 INFO L124 PetriNetUnfolderBase]: 149/287 cut-off events. [2023-11-06 23:06:30,647 INFO L125 PetriNetUnfolderBase]: For 890/890 co-relation queries the response was YES. [2023-11-06 23:06:30,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1232 conditions, 287 events. 149/287 cut-off events. For 890/890 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1068 event pairs, 15 based on Foata normal form. 12/299 useless extension candidates. Maximal degree in co-relation 1196. Up to 153 conditions per place. [2023-11-06 23:06:30,651 INFO L140 encePairwiseOnDemand]: 347/356 looper letters, 35 selfloop transitions, 15 changer transitions 1/51 dead transitions. [2023-11-06 23:06:30,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 51 transitions, 452 flow [2023-11-06 23:06:30,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:06:30,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:06:30,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 818 transitions. [2023-11-06 23:06:30,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25530586766541824 [2023-11-06 23:06:30,656 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 818 transitions. [2023-11-06 23:06:30,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 818 transitions. [2023-11-06 23:06:30,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:30,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 818 transitions. [2023-11-06 23:06:30,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 90.88888888888889) internal successors, (818), 9 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:30,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 356.0) internal successors, (3560), 10 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:30,665 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 356.0) internal successors, (3560), 10 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:30,666 INFO L175 Difference]: Start difference. First operand has 55 places, 37 transitions, 298 flow. Second operand 9 states and 818 transitions. [2023-11-06 23:06:30,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 51 transitions, 452 flow [2023-11-06 23:06:30,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 51 transitions, 428 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-06 23:06:30,670 INFO L231 Difference]: Finished difference. Result has 57 places, 37 transitions, 312 flow [2023-11-06 23:06:30,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=312, PETRI_PLACES=57, PETRI_TRANSITIONS=37} [2023-11-06 23:06:30,671 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 36 predicate places. [2023-11-06 23:06:30,671 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 37 transitions, 312 flow [2023-11-06 23:06:30,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 87.95454545454545) internal successors, (1935), 22 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:30,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:30,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:30,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:30,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 23:06:30,888 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:30,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:30,889 INFO L85 PathProgramCache]: Analyzing trace with hash -143741473, now seen corresponding path program 6 times [2023-11-06 23:06:30,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:30,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192748359] [2023-11-06 23:06:30,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:30,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:31,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:31,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:31,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192748359] [2023-11-06 23:06:31,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192748359] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:31,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593012288] [2023-11-06 23:06:31,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:06:31,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:31,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:31,657 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:31,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:06:31,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 23:06:31,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:31,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 23:06:31,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:32,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:32,097 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 23:06:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:32,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:32,357 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~B~0.offset (* c_~i_AB~0 4)))) (let ((.cse0 (forall ((v_ArrVal_342 (Array Int Int)) (~B~0.base Int)) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_342) ~B~0.base) .cse2)))))) (and (or (< c_~i_BA~0 c_~Bn~0) .cse0) (forall ((v_ArrVal_342 (Array Int Int)) (~B~0.base Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_342))) (let ((.cse1 (select .cse3 ~B~0.base))) (or (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse1 .cse2))) (let ((.cse4 (* c_~i_BA~0 4))) (= (select (select .cse3 c_~A~0.base) (+ c_~A~0.offset .cse4)) (select .cse1 (+ .cse4 c_~B~0.offset)))))))) (or (< c_~i_BA~0 c_~An~0) .cse0)))) is different from false [2023-11-06 23:06:32,374 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:06:32,375 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 36 [2023-11-06 23:06:32,379 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-11-06 23:06:32,448 INFO L322 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-11-06 23:06:32,448 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 146 treesize of output 151 [2023-11-06 23:06:32,483 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:06:32,483 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 92 [2023-11-06 23:06:32,847 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-06 23:06:32,847 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2023-11-06 23:06:33,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:33,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593012288] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:33,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:06:33,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 9] total 23 [2023-11-06 23:06:33,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003448585] [2023-11-06 23:06:33,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:06:33,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 23:06:33,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:33,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 23:06:33,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=432, Unknown=1, NotChecked=42, Total=552 [2023-11-06 23:06:33,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 356 [2023-11-06 23:06:33,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 37 transitions, 312 flow. Second operand has 9 states, 9 states have (on average 93.88888888888889) internal successors, (845), 9 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:33,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:33,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 356 [2023-11-06 23:06:33,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:33,553 INFO L124 PetriNetUnfolderBase]: 146/270 cut-off events. [2023-11-06 23:06:33,553 INFO L125 PetriNetUnfolderBase]: For 1215/1215 co-relation queries the response was YES. [2023-11-06 23:06:33,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1280 conditions, 270 events. 146/270 cut-off events. For 1215/1215 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 923 event pairs, 34 based on Foata normal form. 2/272 useless extension candidates. Maximal degree in co-relation 1243. Up to 244 conditions per place. [2023-11-06 23:06:33,557 INFO L140 encePairwiseOnDemand]: 345/356 looper letters, 28 selfloop transitions, 15 changer transitions 3/46 dead transitions. [2023-11-06 23:06:33,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 46 transitions, 448 flow [2023-11-06 23:06:33,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:06:33,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:06:33,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 867 transitions. [2023-11-06 23:06:33,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2705992509363296 [2023-11-06 23:06:33,562 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 867 transitions. [2023-11-06 23:06:33,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 867 transitions. [2023-11-06 23:06:33,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:33,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 867 transitions. [2023-11-06 23:06:33,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 96.33333333333333) internal successors, (867), 9 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:33,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 356.0) internal successors, (3560), 10 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:33,572 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 356.0) internal successors, (3560), 10 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:33,572 INFO L175 Difference]: Start difference. First operand has 57 places, 37 transitions, 312 flow. Second operand 9 states and 867 transitions. [2023-11-06 23:06:33,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 46 transitions, 448 flow [2023-11-06 23:06:33,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 46 transitions, 410 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-11-06 23:06:33,580 INFO L231 Difference]: Finished difference. Result has 58 places, 39 transitions, 330 flow [2023-11-06 23:06:33,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=330, PETRI_PLACES=58, PETRI_TRANSITIONS=39} [2023-11-06 23:06:33,581 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 37 predicate places. [2023-11-06 23:06:33,581 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 39 transitions, 330 flow [2023-11-06 23:06:33,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 93.88888888888889) internal successors, (845), 9 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:33,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:33,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:33,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:33,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:33,790 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:33,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:33,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1752515055, now seen corresponding path program 4 times [2023-11-06 23:06:33,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:33,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331456578] [2023-11-06 23:06:33,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:33,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:06:34,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:34,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331456578] [2023-11-06 23:06:34,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331456578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:06:34,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:06:34,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 23:06:34,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344762766] [2023-11-06 23:06:34,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:06:34,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:06:34,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:34,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:06:34,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:06:34,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 356 [2023-11-06 23:06:34,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 39 transitions, 330 flow. Second operand has 8 states, 8 states have (on average 141.125) internal successors, (1129), 8 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:34,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:34,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 356 [2023-11-06 23:06:34,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:34,901 INFO L124 PetriNetUnfolderBase]: 150/274 cut-off events. [2023-11-06 23:06:34,901 INFO L125 PetriNetUnfolderBase]: For 961/961 co-relation queries the response was YES. [2023-11-06 23:06:34,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1310 conditions, 274 events. 150/274 cut-off events. For 961/961 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 924 event pairs, 35 based on Foata normal form. 4/278 useless extension candidates. Maximal degree in co-relation 1273. Up to 236 conditions per place. [2023-11-06 23:06:34,905 INFO L140 encePairwiseOnDemand]: 349/356 looper letters, 34 selfloop transitions, 13 changer transitions 0/47 dead transitions. [2023-11-06 23:06:34,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 47 transitions, 469 flow [2023-11-06 23:06:34,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:06:34,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 23:06:34,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1007 transitions. [2023-11-06 23:06:34,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40409309791332265 [2023-11-06 23:06:34,913 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1007 transitions. [2023-11-06 23:06:34,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1007 transitions. [2023-11-06 23:06:34,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:34,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1007 transitions. [2023-11-06 23:06:34,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 143.85714285714286) internal successors, (1007), 7 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:34,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 356.0) internal successors, (2848), 8 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:34,925 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 356.0) internal successors, (2848), 8 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:34,925 INFO L175 Difference]: Start difference. First operand has 58 places, 39 transitions, 330 flow. Second operand 7 states and 1007 transitions. [2023-11-06 23:06:34,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 47 transitions, 469 flow [2023-11-06 23:06:34,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 47 transitions, 429 flow, removed 1 selfloop flow, removed 9 redundant places. [2023-11-06 23:06:34,932 INFO L231 Difference]: Finished difference. Result has 54 places, 40 transitions, 334 flow [2023-11-06 23:06:34,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=334, PETRI_PLACES=54, PETRI_TRANSITIONS=40} [2023-11-06 23:06:34,933 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 33 predicate places. [2023-11-06 23:06:34,934 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 40 transitions, 334 flow [2023-11-06 23:06:34,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 141.125) internal successors, (1129), 8 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:34,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:34,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:34,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-06 23:06:34,935 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:34,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:34,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1929341599, now seen corresponding path program 5 times [2023-11-06 23:06:34,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:34,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197476674] [2023-11-06 23:06:34,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:34,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:06:35,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:35,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197476674] [2023-11-06 23:06:35,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197476674] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:35,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651694546] [2023-11-06 23:06:35,273 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:06:35,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:35,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:35,275 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:35,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:06:35,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:06:35,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:35,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 23:06:35,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:35,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:06:35,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:35,573 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-06 23:06:35,573 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-06 23:06:35,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:06:35,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651694546] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:35,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:35,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-11-06 23:06:35,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657195466] [2023-11-06 23:06:35,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:35,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:06:35,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:35,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:06:35,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:06:35,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 356 [2023-11-06 23:06:35,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 40 transitions, 334 flow. Second operand has 10 states, 10 states have (on average 144.0) internal successors, (1440), 10 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:35,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:35,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 356 [2023-11-06 23:06:35,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:36,155 INFO L124 PetriNetUnfolderBase]: 140/254 cut-off events. [2023-11-06 23:06:36,155 INFO L125 PetriNetUnfolderBase]: For 885/885 co-relation queries the response was YES. [2023-11-06 23:06:36,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1252 conditions, 254 events. 140/254 cut-off events. For 885/885 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 824 event pairs, 29 based on Foata normal form. 4/258 useless extension candidates. Maximal degree in co-relation 1217. Up to 198 conditions per place. [2023-11-06 23:06:36,159 INFO L140 encePairwiseOnDemand]: 349/356 looper letters, 34 selfloop transitions, 14 changer transitions 0/48 dead transitions. [2023-11-06 23:06:36,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 48 transitions, 475 flow [2023-11-06 23:06:36,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:06:36,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 23:06:36,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1023 transitions. [2023-11-06 23:06:36,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105136436597111 [2023-11-06 23:06:36,162 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1023 transitions. [2023-11-06 23:06:36,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1023 transitions. [2023-11-06 23:06:36,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:36,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1023 transitions. [2023-11-06 23:06:36,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 146.14285714285714) internal successors, (1023), 7 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:36,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 356.0) internal successors, (2848), 8 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:36,170 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 356.0) internal successors, (2848), 8 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:36,171 INFO L175 Difference]: Start difference. First operand has 54 places, 40 transitions, 334 flow. Second operand 7 states and 1023 transitions. [2023-11-06 23:06:36,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 48 transitions, 475 flow [2023-11-06 23:06:36,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 48 transitions, 450 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-06 23:06:36,175 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 341 flow [2023-11-06 23:06:36,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=341, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2023-11-06 23:06:36,176 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 35 predicate places. [2023-11-06 23:06:36,176 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 341 flow [2023-11-06 23:06:36,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 144.0) internal successors, (1440), 10 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:36,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:36,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:36,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-06 23:06:36,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 23:06:36,382 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:36,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:36,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1754953607, now seen corresponding path program 1 times [2023-11-06 23:06:36,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:36,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558710519] [2023-11-06 23:06:36,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:36,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:36,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:36,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:06:36,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:36,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558710519] [2023-11-06 23:06:36,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558710519] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:36,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176756035] [2023-11-06 23:06:36,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:36,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:36,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:36,504 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:36,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:06:36,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:36,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:06:36,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:36,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:06:36,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:36,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:06:36,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176756035] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:36,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:36,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-11-06 23:06:36,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376397331] [2023-11-06 23:06:36,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:36,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:06:36,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:36,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:06:36,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:06:36,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 356 [2023-11-06 23:06:36,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 163.28571428571428) internal successors, (1143), 7 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:36,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:36,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 356 [2023-11-06 23:06:36,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:37,006 INFO L124 PetriNetUnfolderBase]: 300/546 cut-off events. [2023-11-06 23:06:37,006 INFO L125 PetriNetUnfolderBase]: For 1678/1678 co-relation queries the response was YES. [2023-11-06 23:06:37,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2455 conditions, 546 events. 300/546 cut-off events. For 1678/1678 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2256 event pairs, 26 based on Foata normal form. 4/550 useless extension candidates. Maximal degree in co-relation 2419. Up to 263 conditions per place. [2023-11-06 23:06:37,015 INFO L140 encePairwiseOnDemand]: 352/356 looper letters, 65 selfloop transitions, 18 changer transitions 2/85 dead transitions. [2023-11-06 23:06:37,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 85 transitions, 751 flow [2023-11-06 23:06:37,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:06:37,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 23:06:37,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1174 transitions. [2023-11-06 23:06:37,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471107544141252 [2023-11-06 23:06:37,018 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1174 transitions. [2023-11-06 23:06:37,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1174 transitions. [2023-11-06 23:06:37,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:37,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1174 transitions. [2023-11-06 23:06:37,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 167.71428571428572) internal successors, (1174), 7 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:37,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 356.0) internal successors, (2848), 8 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:37,026 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 356.0) internal successors, (2848), 8 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:37,026 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 341 flow. Second operand 7 states and 1174 transitions. [2023-11-06 23:06:37,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 85 transitions, 751 flow [2023-11-06 23:06:37,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 85 transitions, 713 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-11-06 23:06:37,033 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 443 flow [2023-11-06 23:06:37,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=443, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2023-11-06 23:06:37,034 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 38 predicate places. [2023-11-06 23:06:37,034 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 443 flow [2023-11-06 23:06:37,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 163.28571428571428) internal successors, (1143), 7 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:37,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:37,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:37,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:37,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 23:06:37,241 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:37,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:37,241 INFO L85 PathProgramCache]: Analyzing trace with hash 572780409, now seen corresponding path program 2 times [2023-11-06 23:06:37,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:37,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303660810] [2023-11-06 23:06:37,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:37,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:37,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:06:37,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:37,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303660810] [2023-11-06 23:06:37,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303660810] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:37,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210041039] [2023-11-06 23:06:37,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:06:37,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:37,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:37,341 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:37,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:06:37,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:06:37,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:37,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:06:37,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:06:37,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:37,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:06:37,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210041039] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:37,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:37,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-11-06 23:06:37,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473498921] [2023-11-06 23:06:37,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:37,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:06:37,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:37,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:06:37,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:06:37,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 356 [2023-11-06 23:06:37,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 443 flow. Second operand has 7 states, 7 states have (on average 163.28571428571428) internal successors, (1143), 7 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:37,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:37,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 356 [2023-11-06 23:06:37,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:37,886 INFO L124 PetriNetUnfolderBase]: 420/762 cut-off events. [2023-11-06 23:06:37,886 INFO L125 PetriNetUnfolderBase]: For 2921/2921 co-relation queries the response was YES. [2023-11-06 23:06:37,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3577 conditions, 762 events. 420/762 cut-off events. For 2921/2921 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3493 event pairs, 95 based on Foata normal form. 4/766 useless extension candidates. Maximal degree in co-relation 3540. Up to 546 conditions per place. [2023-11-06 23:06:37,896 INFO L140 encePairwiseOnDemand]: 352/356 looper letters, 70 selfloop transitions, 18 changer transitions 2/90 dead transitions. [2023-11-06 23:06:37,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 855 flow [2023-11-06 23:06:37,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:06:37,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 23:06:37,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1169 transitions. [2023-11-06 23:06:37,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4691011235955056 [2023-11-06 23:06:37,902 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1169 transitions. [2023-11-06 23:06:37,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1169 transitions. [2023-11-06 23:06:37,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:37,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1169 transitions. [2023-11-06 23:06:37,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 167.0) internal successors, (1169), 7 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:37,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 356.0) internal successors, (2848), 8 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:37,913 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 356.0) internal successors, (2848), 8 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:37,914 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 443 flow. Second operand 7 states and 1169 transitions. [2023-11-06 23:06:37,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 855 flow [2023-11-06 23:06:37,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 90 transitions, 821 flow, removed 13 selfloop flow, removed 1 redundant places. [2023-11-06 23:06:37,922 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 561 flow [2023-11-06 23:06:37,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=561, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2023-11-06 23:06:37,923 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 46 predicate places. [2023-11-06 23:06:37,924 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 561 flow [2023-11-06 23:06:37,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 163.28571428571428) internal successors, (1143), 7 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:37,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:37,924 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:37,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:38,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:38,130 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:38,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:38,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1525381585, now seen corresponding path program 3 times [2023-11-06 23:06:38,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:38,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842792658] [2023-11-06 23:06:38,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:38,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:38,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:06:38,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:38,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842792658] [2023-11-06 23:06:38,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842792658] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:38,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990192897] [2023-11-06 23:06:38,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:06:38,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:38,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:38,253 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:38,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:06:38,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 23:06:38,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:38,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:06:38,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:06:38,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:06:38,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990192897] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:38,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:38,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2023-11-06 23:06:38,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728318284] [2023-11-06 23:06:38,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:38,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 23:06:38,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:38,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 23:06:38,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:06:39,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 356 [2023-11-06 23:06:39,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 561 flow. Second operand has 15 states, 15 states have (on average 142.0) internal successors, (2130), 15 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:39,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:39,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 356 [2023-11-06 23:06:39,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:39,731 INFO L124 PetriNetUnfolderBase]: 1147/2220 cut-off events. [2023-11-06 23:06:39,731 INFO L125 PetriNetUnfolderBase]: For 9932/9932 co-relation queries the response was YES. [2023-11-06 23:06:39,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10695 conditions, 2220 events. 1147/2220 cut-off events. For 9932/9932 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 14048 event pairs, 484 based on Foata normal form. 168/2388 useless extension candidates. Maximal degree in co-relation 10305. Up to 760 conditions per place. [2023-11-06 23:06:39,761 INFO L140 encePairwiseOnDemand]: 350/356 looper letters, 166 selfloop transitions, 41 changer transitions 0/207 dead transitions. [2023-11-06 23:06:39,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 207 transitions, 2295 flow [2023-11-06 23:06:39,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 23:06:39,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 23:06:39,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2181 transitions. [2023-11-06 23:06:39,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4084269662921348 [2023-11-06 23:06:39,769 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2181 transitions. [2023-11-06 23:06:39,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2181 transitions. [2023-11-06 23:06:39,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:39,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2181 transitions. [2023-11-06 23:06:39,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 145.4) internal successors, (2181), 15 states have internal predecessors, (2181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:39,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 356.0) internal successors, (5696), 16 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:39,787 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 356.0) internal successors, (5696), 16 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:39,787 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 561 flow. Second operand 15 states and 2181 transitions. [2023-11-06 23:06:39,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 207 transitions, 2295 flow [2023-11-06 23:06:39,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 207 transitions, 2194 flow, removed 36 selfloop flow, removed 1 redundant places. [2023-11-06 23:06:39,814 INFO L231 Difference]: Finished difference. Result has 86 places, 97 transitions, 1146 flow [2023-11-06 23:06:39,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1146, PETRI_PLACES=86, PETRI_TRANSITIONS=97} [2023-11-06 23:06:39,815 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2023-11-06 23:06:39,816 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 97 transitions, 1146 flow [2023-11-06 23:06:39,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 142.0) internal successors, (2130), 15 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:39,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:39,817 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:39,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:40,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:40,030 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:40,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:40,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1184991409, now seen corresponding path program 4 times [2023-11-06 23:06:40,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:40,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880601574] [2023-11-06 23:06:40,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:40,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:06:40,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:40,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880601574] [2023-11-06 23:06:40,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880601574] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:40,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806236238] [2023-11-06 23:06:40,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:06:40,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:40,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:40,178 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:40,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 23:06:40,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:06:40,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:40,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:06:40,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:06:40,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:40,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:06:40,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806236238] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:40,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:40,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-06 23:06:40,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892829887] [2023-11-06 23:06:40,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:40,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 23:06:40,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:40,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 23:06:40,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:06:40,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 356 [2023-11-06 23:06:40,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 97 transitions, 1146 flow. Second operand has 13 states, 13 states have (on average 144.07692307692307) internal successors, (1873), 13 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:40,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:40,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 356 [2023-11-06 23:06:40,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:41,289 INFO L124 PetriNetUnfolderBase]: 799/1552 cut-off events. [2023-11-06 23:06:41,289 INFO L125 PetriNetUnfolderBase]: For 8334/8334 co-relation queries the response was YES. [2023-11-06 23:06:41,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7847 conditions, 1552 events. 799/1552 cut-off events. For 8334/8334 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8873 event pairs, 448 based on Foata normal form. 36/1588 useless extension candidates. Maximal degree in co-relation 7518. Up to 1247 conditions per place. [2023-11-06 23:06:41,309 INFO L140 encePairwiseOnDemand]: 351/356 looper letters, 70 selfloop transitions, 3 changer transitions 44/117 dead transitions. [2023-11-06 23:06:41,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 117 transitions, 1490 flow [2023-11-06 23:06:41,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:06:41,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:06:41,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 888 transitions. [2023-11-06 23:06:41,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4157303370786517 [2023-11-06 23:06:41,311 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 888 transitions. [2023-11-06 23:06:41,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 888 transitions. [2023-11-06 23:06:41,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:41,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 888 transitions. [2023-11-06 23:06:41,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 148.0) internal successors, (888), 6 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:41,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 356.0) internal successors, (2492), 7 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:41,317 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 356.0) internal successors, (2492), 7 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:41,317 INFO L175 Difference]: Start difference. First operand has 86 places, 97 transitions, 1146 flow. Second operand 6 states and 888 transitions. [2023-11-06 23:06:41,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 117 transitions, 1490 flow [2023-11-06 23:06:41,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 117 transitions, 1461 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-11-06 23:06:41,345 INFO L231 Difference]: Finished difference. Result has 90 places, 73 transitions, 774 flow [2023-11-06 23:06:41,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=774, PETRI_PLACES=90, PETRI_TRANSITIONS=73} [2023-11-06 23:06:41,346 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 69 predicate places. [2023-11-06 23:06:41,346 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 73 transitions, 774 flow [2023-11-06 23:06:41,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 144.07692307692307) internal successors, (1873), 13 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:41,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:41,347 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:41,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:41,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:41,563 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:41,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:41,564 INFO L85 PathProgramCache]: Analyzing trace with hash -474774156, now seen corresponding path program 5 times [2023-11-06 23:06:41,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:41,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033382068] [2023-11-06 23:06:41,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:41,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:06:41,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:41,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033382068] [2023-11-06 23:06:41,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033382068] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:41,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149722703] [2023-11-06 23:06:41,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:06:41,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:41,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:41,684 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:41,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 23:06:41,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 23:06:41,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:41,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:06:41,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:06:41,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:06:41,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149722703] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:41,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:41,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-11-06 23:06:41,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009891481] [2023-11-06 23:06:41,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:41,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 23:06:41,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:41,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 23:06:41,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:06:42,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 356 [2023-11-06 23:06:42,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 73 transitions, 774 flow. Second operand has 15 states, 15 states have (on average 143.53333333333333) internal successors, (2153), 15 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:42,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:42,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 356 [2023-11-06 23:06:42,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:42,657 INFO L124 PetriNetUnfolderBase]: 488/914 cut-off events. [2023-11-06 23:06:42,657 INFO L125 PetriNetUnfolderBase]: For 4592/4592 co-relation queries the response was YES. [2023-11-06 23:06:42,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4662 conditions, 914 events. 488/914 cut-off events. For 4592/4592 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4505 event pairs, 168 based on Foata normal form. 18/932 useless extension candidates. Maximal degree in co-relation 4614. Up to 677 conditions per place. [2023-11-06 23:06:42,670 INFO L140 encePairwiseOnDemand]: 350/356 looper letters, 53 selfloop transitions, 13 changer transitions 32/98 dead transitions. [2023-11-06 23:06:42,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 98 transitions, 1154 flow [2023-11-06 23:06:42,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:06:42,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 23:06:42,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1175 transitions. [2023-11-06 23:06:42,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125702247191011 [2023-11-06 23:06:42,673 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1175 transitions. [2023-11-06 23:06:42,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1175 transitions. [2023-11-06 23:06:42,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:42,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1175 transitions. [2023-11-06 23:06:42,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 146.875) internal successors, (1175), 8 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:42,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 356.0) internal successors, (3204), 9 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:42,682 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 356.0) internal successors, (3204), 9 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:42,683 INFO L175 Difference]: Start difference. First operand has 90 places, 73 transitions, 774 flow. Second operand 8 states and 1175 transitions. [2023-11-06 23:06:42,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 98 transitions, 1154 flow [2023-11-06 23:06:42,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 98 transitions, 1096 flow, removed 26 selfloop flow, removed 8 redundant places. [2023-11-06 23:06:42,701 INFO L231 Difference]: Finished difference. Result has 82 places, 62 transitions, 584 flow [2023-11-06 23:06:42,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=584, PETRI_PLACES=82, PETRI_TRANSITIONS=62} [2023-11-06 23:06:42,702 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 61 predicate places. [2023-11-06 23:06:42,702 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 62 transitions, 584 flow [2023-11-06 23:06:42,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 143.53333333333333) internal successors, (2153), 15 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:42,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:42,703 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:42,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:42,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:42,909 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:42,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:42,910 INFO L85 PathProgramCache]: Analyzing trace with hash 346908367, now seen corresponding path program 6 times [2023-11-06 23:06:42,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:42,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772607629] [2023-11-06 23:06:42,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:42,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:06:43,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:43,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772607629] [2023-11-06 23:06:43,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772607629] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:43,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334868453] [2023-11-06 23:06:43,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:06:43,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:43,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:43,149 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:43,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 23:06:43,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 23:06:43,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:43,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 23:06:43,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:06:43,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:43,707 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:06:43,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334868453] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:43,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:43,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-06 23:06:43,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275296115] [2023-11-06 23:06:43,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:43,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 23:06:43,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:43,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 23:06:43,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2023-11-06 23:06:44,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 356 [2023-11-06 23:06:44,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 62 transitions, 584 flow. Second operand has 22 states, 22 states have (on average 140.13636363636363) internal successors, (3083), 22 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:44,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:44,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 356 [2023-11-06 23:06:44,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:44,967 INFO L124 PetriNetUnfolderBase]: 425/771 cut-off events. [2023-11-06 23:06:44,967 INFO L125 PetriNetUnfolderBase]: For 3355/3355 co-relation queries the response was YES. [2023-11-06 23:06:44,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3746 conditions, 771 events. 425/771 cut-off events. For 3355/3355 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3446 event pairs, 88 based on Foata normal form. 26/797 useless extension candidates. Maximal degree in co-relation 3700. Up to 246 conditions per place. [2023-11-06 23:06:44,978 INFO L140 encePairwiseOnDemand]: 348/356 looper letters, 69 selfloop transitions, 27 changer transitions 0/96 dead transitions. [2023-11-06 23:06:44,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 96 transitions, 1016 flow [2023-11-06 23:06:44,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 23:06:44,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 23:06:44,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1570 transitions. [2023-11-06 23:06:44,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4009193054136874 [2023-11-06 23:06:44,982 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1570 transitions. [2023-11-06 23:06:44,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1570 transitions. [2023-11-06 23:06:44,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:44,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1570 transitions. [2023-11-06 23:06:44,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 142.72727272727272) internal successors, (1570), 11 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:44,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 356.0) internal successors, (4272), 12 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:44,991 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 356.0) internal successors, (4272), 12 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:44,992 INFO L175 Difference]: Start difference. First operand has 82 places, 62 transitions, 584 flow. Second operand 11 states and 1570 transitions. [2023-11-06 23:06:44,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 96 transitions, 1016 flow [2023-11-06 23:06:45,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 96 transitions, 955 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-11-06 23:06:45,004 INFO L231 Difference]: Finished difference. Result has 84 places, 65 transitions, 642 flow [2023-11-06 23:06:45,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=642, PETRI_PLACES=84, PETRI_TRANSITIONS=65} [2023-11-06 23:06:45,005 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 63 predicate places. [2023-11-06 23:06:45,005 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 65 transitions, 642 flow [2023-11-06 23:06:45,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 140.13636363636363) internal successors, (3083), 22 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:45,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:45,007 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:45,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:45,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:45,212 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:45,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:45,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1038107201, now seen corresponding path program 1 times [2023-11-06 23:06:45,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:45,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962943198] [2023-11-06 23:06:45,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:45,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:45,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:06:45,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:45,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962943198] [2023-11-06 23:06:45,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962943198] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:45,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019224437] [2023-11-06 23:06:45,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:45,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:45,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:45,798 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:45,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 23:06:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:45,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 23:06:45,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:46,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:06:46,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:46,282 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-06 23:06:46,283 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-06 23:06:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:06:46,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019224437] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:46,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:46,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 18 [2023-11-06 23:06:46,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498144323] [2023-11-06 23:06:46,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:46,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 23:06:46,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:46,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 23:06:46,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:06:47,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 356 [2023-11-06 23:06:47,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 65 transitions, 642 flow. Second operand has 19 states, 19 states have (on average 143.42105263157896) internal successors, (2725), 19 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:47,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:47,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 356 [2023-11-06 23:06:47,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:47,882 INFO L124 PetriNetUnfolderBase]: 439/811 cut-off events. [2023-11-06 23:06:47,883 INFO L125 PetriNetUnfolderBase]: For 3402/3402 co-relation queries the response was YES. [2023-11-06 23:06:47,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3981 conditions, 811 events. 439/811 cut-off events. For 3402/3402 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3748 event pairs, 97 based on Foata normal form. 8/819 useless extension candidates. Maximal degree in co-relation 3933. Up to 539 conditions per place. [2023-11-06 23:06:47,897 INFO L140 encePairwiseOnDemand]: 349/356 looper letters, 79 selfloop transitions, 30 changer transitions 19/128 dead transitions. [2023-11-06 23:06:47,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 128 transitions, 1277 flow [2023-11-06 23:06:47,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 23:06:47,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 23:06:47,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1922 transitions. [2023-11-06 23:06:47,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152981849611063 [2023-11-06 23:06:47,901 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1922 transitions. [2023-11-06 23:06:47,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1922 transitions. [2023-11-06 23:06:47,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:47,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1922 transitions. [2023-11-06 23:06:47,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 147.84615384615384) internal successors, (1922), 13 states have internal predecessors, (1922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:47,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 356.0) internal successors, (4984), 14 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:47,912 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 356.0) internal successors, (4984), 14 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:47,912 INFO L175 Difference]: Start difference. First operand has 84 places, 65 transitions, 642 flow. Second operand 13 states and 1922 transitions. [2023-11-06 23:06:47,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 128 transitions, 1277 flow [2023-11-06 23:06:47,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 128 transitions, 1252 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-06 23:06:47,926 INFO L231 Difference]: Finished difference. Result has 93 places, 76 transitions, 820 flow [2023-11-06 23:06:47,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=820, PETRI_PLACES=93, PETRI_TRANSITIONS=76} [2023-11-06 23:06:47,927 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 72 predicate places. [2023-11-06 23:06:47,927 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 76 transitions, 820 flow [2023-11-06 23:06:47,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 143.42105263157896) internal successors, (2725), 19 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:47,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:47,928 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:47,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:48,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 23:06:48,135 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:48,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:48,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1976241935, now seen corresponding path program 7 times [2023-11-06 23:06:48,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:48,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572247526] [2023-11-06 23:06:48,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:48,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:48,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:48,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572247526] [2023-11-06 23:06:48,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572247526] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:48,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722497839] [2023-11-06 23:06:48,859 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:06:48,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:48,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:48,861 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:48,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 23:06:48,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:48,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 23:06:49,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:49,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:49,650 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-06 23:06:49,651 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-11-06 23:06:49,706 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-06 23:06:49,707 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-06 23:06:49,728 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-06 23:06:49,729 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-11-06 23:06:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:50,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722497839] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:50,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:50,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2023-11-06 23:06:50,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392827927] [2023-11-06 23:06:50,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:50,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 23:06:50,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:50,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 23:06:50,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2023-11-06 23:06:52,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:06:57,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:06:57,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 356 [2023-11-06 23:06:57,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 76 transitions, 820 flow. Second operand has 32 states, 32 states have (on average 124.8125) internal successors, (3994), 32 states have internal predecessors, (3994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:57,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:57,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 356 [2023-11-06 23:06:57,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:58,543 INFO L124 PetriNetUnfolderBase]: 455/837 cut-off events. [2023-11-06 23:06:58,544 INFO L125 PetriNetUnfolderBase]: For 4227/4227 co-relation queries the response was YES. [2023-11-06 23:06:58,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4482 conditions, 837 events. 455/837 cut-off events. For 4227/4227 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3900 event pairs, 113 based on Foata normal form. 12/849 useless extension candidates. Maximal degree in co-relation 4431. Up to 612 conditions per place. [2023-11-06 23:06:58,554 INFO L140 encePairwiseOnDemand]: 345/356 looper letters, 73 selfloop transitions, 30 changer transitions 0/103 dead transitions. [2023-11-06 23:06:58,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 103 transitions, 1214 flow [2023-11-06 23:06:58,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 23:06:58,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 23:06:58,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1661 transitions. [2023-11-06 23:06:58,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35890233362143475 [2023-11-06 23:06:58,558 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1661 transitions. [2023-11-06 23:06:58,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1661 transitions. [2023-11-06 23:06:58,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:58,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1661 transitions. [2023-11-06 23:06:58,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 127.76923076923077) internal successors, (1661), 13 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:58,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 356.0) internal successors, (4984), 14 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:58,567 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 356.0) internal successors, (4984), 14 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:58,567 INFO L175 Difference]: Start difference. First operand has 93 places, 76 transitions, 820 flow. Second operand 13 states and 1661 transitions. [2023-11-06 23:06:58,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 103 transitions, 1214 flow [2023-11-06 23:06:58,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 103 transitions, 1144 flow, removed 11 selfloop flow, removed 6 redundant places. [2023-11-06 23:06:58,583 INFO L231 Difference]: Finished difference. Result has 99 places, 79 transitions, 862 flow [2023-11-06 23:06:58,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=862, PETRI_PLACES=99, PETRI_TRANSITIONS=79} [2023-11-06 23:06:58,584 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 78 predicate places. [2023-11-06 23:06:58,584 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 79 transitions, 862 flow [2023-11-06 23:06:58,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 124.8125) internal successors, (3994), 32 states have internal predecessors, (3994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:58,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:58,585 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:58,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:58,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-06 23:06:58,791 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:58,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:58,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1101063587, now seen corresponding path program 2 times [2023-11-06 23:06:58,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:58,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765365766] [2023-11-06 23:06:58,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:58,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:59,186 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:06:59,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:59,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765365766] [2023-11-06 23:06:59,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765365766] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:59,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087555513] [2023-11-06 23:06:59,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:06:59,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:59,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:59,189 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:59,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 23:06:59,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:06:59,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:59,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 23:06:59,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:59,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:06:59,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:59,740 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-06 23:06:59,740 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-06 23:06:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:06:59,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087555513] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:59,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:59,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 19 [2023-11-06 23:06:59,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268375602] [2023-11-06 23:06:59,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:59,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 23:06:59,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:59,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 23:06:59,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-11-06 23:07:01,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 356 [2023-11-06 23:07:01,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 79 transitions, 862 flow. Second operand has 20 states, 20 states have (on average 143.4) internal successors, (2868), 20 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) [2023-11-06 23:07:01,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:01,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 356 [2023-11-06 23:07:01,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:02,538 INFO L124 PetriNetUnfolderBase]: 493/895 cut-off events. [2023-11-06 23:07:02,538 INFO L125 PetriNetUnfolderBase]: For 5862/5862 co-relation queries the response was YES. [2023-11-06 23:07:02,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5015 conditions, 895 events. 493/895 cut-off events. For 5862/5862 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4196 event pairs, 101 based on Foata normal form. 12/907 useless extension candidates. Maximal degree in co-relation 4960. Up to 597 conditions per place. [2023-11-06 23:07:02,546 INFO L140 encePairwiseOnDemand]: 349/356 looper letters, 82 selfloop transitions, 45 changer transitions 1/128 dead transitions. [2023-11-06 23:07:02,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 128 transitions, 1472 flow [2023-11-06 23:07:02,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 23:07:02,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 23:07:02,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2063 transitions. [2023-11-06 23:07:02,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41392455858747995 [2023-11-06 23:07:02,556 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2063 transitions. [2023-11-06 23:07:02,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2063 transitions. [2023-11-06 23:07:02,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:02,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2063 transitions. [2023-11-06 23:07:02,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 147.35714285714286) internal successors, (2063), 14 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:02,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 356.0) internal successors, (5340), 15 states have internal predecessors, (5340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:02,566 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 356.0) internal successors, (5340), 15 states have internal predecessors, (5340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:02,566 INFO L175 Difference]: Start difference. First operand has 99 places, 79 transitions, 862 flow. Second operand 14 states and 2063 transitions. [2023-11-06 23:07:02,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 128 transitions, 1472 flow [2023-11-06 23:07:02,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 128 transitions, 1409 flow, removed 6 selfloop flow, removed 10 redundant places. [2023-11-06 23:07:02,589 INFO L231 Difference]: Finished difference. Result has 107 places, 91 transitions, 1065 flow [2023-11-06 23:07:02,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1065, PETRI_PLACES=107, PETRI_TRANSITIONS=91} [2023-11-06 23:07:02,590 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 86 predicate places. [2023-11-06 23:07:02,591 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 91 transitions, 1065 flow [2023-11-06 23:07:02,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 143.4) internal successors, (2868), 20 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) [2023-11-06 23:07:02,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:02,591 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:02,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:02,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 23:07:02,797 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:07:02,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:02,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1838111777, now seen corresponding path program 3 times [2023-11-06 23:07:02,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:02,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109212848] [2023-11-06 23:07:02,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:02,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:02,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:03,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:07:03,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:03,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109212848] [2023-11-06 23:07:03,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109212848] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:03,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578277456] [2023-11-06 23:07:03,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:07:03,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:03,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:03,347 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:03,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 23:07:03,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 23:07:03,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:03,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-06 23:07:03,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:03,524 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-11-06 23:07:03,533 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 23:07:03,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:03,559 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 23:07:03,566 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-11-06 23:07:03,722 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 23:07:03,827 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 23:07:03,827 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 23:07:03,918 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:07:03,992 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 23:07:04,083 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:07:04,211 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:07:04,539 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:04,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:05,477 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:07:05,478 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 87 [2023-11-06 23:07:05,924 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:07:05,924 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 84 [2023-11-06 23:07:05,970 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 23:07:05,971 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15180 treesize of output 14543 [2023-11-06 23:07:06,204 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:07:06,266 INFO L322 Elim1Store]: treesize reduction 8, result has 84.9 percent of original size [2023-11-06 23:07:06,266 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 1436 treesize of output 1368 [2023-11-06 23:07:06,326 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:07:06,331 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:07:06,363 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:07:06,364 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 1324 treesize of output 1208 [2023-11-06 23:07:06,431 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:07:06,437 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:07:06,468 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:07:06,468 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 1164 treesize of output 888 [2023-11-06 23:07:11,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:11,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578277456] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:11,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:11,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 32 [2023-11-06 23:07:11,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614218837] [2023-11-06 23:07:11,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:11,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-06 23:07:11,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:11,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-06 23:07:11,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=859, Unknown=26, NotChecked=0, Total=1056 [2023-11-06 23:07:13,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 356 [2023-11-06 23:07:13,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 91 transitions, 1065 flow. Second operand has 33 states, 33 states have (on average 89.63636363636364) internal successors, (2958), 33 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:13,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:13,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 356 [2023-11-06 23:07:13,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:18,269 INFO L124 PetriNetUnfolderBase]: 1266/2376 cut-off events. [2023-11-06 23:07:18,269 INFO L125 PetriNetUnfolderBase]: For 19249/19249 co-relation queries the response was YES. [2023-11-06 23:07:18,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13739 conditions, 2376 events. 1266/2376 cut-off events. For 19249/19249 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14707 event pairs, 134 based on Foata normal form. 60/2436 useless extension candidates. Maximal degree in co-relation 12658. Up to 726 conditions per place. [2023-11-06 23:07:18,289 INFO L140 encePairwiseOnDemand]: 346/356 looper letters, 167 selfloop transitions, 155 changer transitions 14/336 dead transitions. [2023-11-06 23:07:18,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 336 transitions, 4083 flow [2023-11-06 23:07:18,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 23:07:18,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-06 23:07:18,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3460 transitions. [2023-11-06 23:07:18,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2626784087458245 [2023-11-06 23:07:18,298 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3460 transitions. [2023-11-06 23:07:18,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3460 transitions. [2023-11-06 23:07:18,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:18,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3460 transitions. [2023-11-06 23:07:18,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 93.51351351351352) internal successors, (3460), 37 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:18,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 356.0) internal successors, (13528), 38 states have internal predecessors, (13528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:18,318 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 356.0) internal successors, (13528), 38 states have internal predecessors, (13528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:18,318 INFO L175 Difference]: Start difference. First operand has 107 places, 91 transitions, 1065 flow. Second operand 37 states and 3460 transitions. [2023-11-06 23:07:18,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 336 transitions, 4083 flow [2023-11-06 23:07:18,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 336 transitions, 3924 flow, removed 35 selfloop flow, removed 7 redundant places. [2023-11-06 23:07:18,389 INFO L231 Difference]: Finished difference. Result has 150 places, 221 transitions, 3142 flow [2023-11-06 23:07:18,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=995, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3142, PETRI_PLACES=150, PETRI_TRANSITIONS=221} [2023-11-06 23:07:18,390 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 129 predicate places. [2023-11-06 23:07:18,391 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 221 transitions, 3142 flow [2023-11-06 23:07:18,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 89.63636363636364) internal successors, (2958), 33 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:18,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:18,391 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:18,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:18,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 23:07:18,597 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:07:18,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:18,598 INFO L85 PathProgramCache]: Analyzing trace with hash -847487291, now seen corresponding path program 8 times [2023-11-06 23:07:18,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:18,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59008027] [2023-11-06 23:07:18,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:18,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:19,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:19,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59008027] [2023-11-06 23:07:19,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59008027] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:19,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666807186] [2023-11-06 23:07:19,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:07:19,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:19,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:19,401 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:19,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 23:07:19,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:07:19,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:19,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 23:07:19,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:20,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:20,295 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-06 23:07:20,295 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-11-06 23:07:20,346 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-06 23:07:20,348 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-06 23:07:20,372 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-06 23:07:20,372 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-11-06 23:07:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:20,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666807186] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:20,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:20,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2023-11-06 23:07:20,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836852567] [2023-11-06 23:07:20,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:20,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 23:07:20,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:20,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 23:07:20,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2023-11-06 23:07:24,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 356 [2023-11-06 23:07:24,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 221 transitions, 3142 flow. Second operand has 32 states, 32 states have (on average 124.75) internal successors, (3992), 32 states have internal predecessors, (3992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:24,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:24,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 356 [2023-11-06 23:07:24,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:25,180 INFO L124 PetriNetUnfolderBase]: 1316/2511 cut-off events. [2023-11-06 23:07:25,181 INFO L125 PetriNetUnfolderBase]: For 22995/22995 co-relation queries the response was YES. [2023-11-06 23:07:25,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15846 conditions, 2511 events. 1316/2511 cut-off events. For 22995/22995 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 15926 event pairs, 319 based on Foata normal form. 48/2559 useless extension candidates. Maximal degree in co-relation 15402. Up to 2103 conditions per place. [2023-11-06 23:07:25,206 INFO L140 encePairwiseOnDemand]: 345/356 looper letters, 201 selfloop transitions, 76 changer transitions 4/281 dead transitions. [2023-11-06 23:07:25,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 281 transitions, 4296 flow [2023-11-06 23:07:25,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 23:07:25,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 23:07:25,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2175 transitions. [2023-11-06 23:07:25,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3593853271645737 [2023-11-06 23:07:25,211 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2175 transitions. [2023-11-06 23:07:25,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2175 transitions. [2023-11-06 23:07:25,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:25,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2175 transitions. [2023-11-06 23:07:25,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 127.94117647058823) internal successors, (2175), 17 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:25,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 356.0) internal successors, (6408), 18 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:25,222 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 356.0) internal successors, (6408), 18 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:25,222 INFO L175 Difference]: Start difference. First operand has 150 places, 221 transitions, 3142 flow. Second operand 17 states and 2175 transitions. [2023-11-06 23:07:25,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 281 transitions, 4296 flow [2023-11-06 23:07:25,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 281 transitions, 3785 flow, removed 197 selfloop flow, removed 12 redundant places. [2023-11-06 23:07:25,369 INFO L231 Difference]: Finished difference. Result has 153 places, 233 transitions, 3030 flow [2023-11-06 23:07:25,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=2703, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3030, PETRI_PLACES=153, PETRI_TRANSITIONS=233} [2023-11-06 23:07:25,370 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 132 predicate places. [2023-11-06 23:07:25,371 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 233 transitions, 3030 flow [2023-11-06 23:07:25,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 124.75) internal successors, (3992), 32 states have internal predecessors, (3992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:25,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:25,372 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:25,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:25,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 23:07:25,578 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:07:25,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:25,578 INFO L85 PathProgramCache]: Analyzing trace with hash 9008655, now seen corresponding path program 9 times [2023-11-06 23:07:25,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:25,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976453399] [2023-11-06 23:07:25,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:25,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:26,319 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:26,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:26,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976453399] [2023-11-06 23:07:26,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976453399] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:26,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264763319] [2023-11-06 23:07:26,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:07:26,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:26,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:26,321 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:26,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 23:07:26,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 23:07:26,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:26,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-06 23:07:26,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:26,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:26,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:27,149 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-06 23:07:27,149 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-06 23:07:27,170 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-06 23:07:27,170 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-11-06 23:07:27,178 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-06 23:07:27,179 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-11-06 23:07:27,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:27,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264763319] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:27,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:27,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2023-11-06 23:07:27,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940070655] [2023-11-06 23:07:27,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:27,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 23:07:27,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:27,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 23:07:27,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2023-11-06 23:07:30,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 356 [2023-11-06 23:07:30,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 233 transitions, 3030 flow. Second operand has 28 states, 28 states have (on average 124.67857142857143) internal successors, (3491), 28 states have internal predecessors, (3491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:30,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:30,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 356 [2023-11-06 23:07:30,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:31,661 INFO L124 PetriNetUnfolderBase]: 1288/2399 cut-off events. [2023-11-06 23:07:31,662 INFO L125 PetriNetUnfolderBase]: For 15874/15874 co-relation queries the response was YES. [2023-11-06 23:07:31,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14279 conditions, 2399 events. 1288/2399 cut-off events. For 15874/15874 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 14641 event pairs, 350 based on Foata normal form. 4/2403 useless extension candidates. Maximal degree in co-relation 14210. Up to 2235 conditions per place. [2023-11-06 23:07:31,731 INFO L140 encePairwiseOnDemand]: 345/356 looper letters, 182 selfloop transitions, 61 changer transitions 2/245 dead transitions. [2023-11-06 23:07:31,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 245 transitions, 3576 flow [2023-11-06 23:07:31,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 23:07:31,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 23:07:31,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1777 transitions. [2023-11-06 23:07:31,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35654093097913325 [2023-11-06 23:07:31,737 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1777 transitions. [2023-11-06 23:07:31,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1777 transitions. [2023-11-06 23:07:31,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:31,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1777 transitions. [2023-11-06 23:07:31,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 126.92857142857143) internal successors, (1777), 14 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:31,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 356.0) internal successors, (5340), 15 states have internal predecessors, (5340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:31,745 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 356.0) internal successors, (5340), 15 states have internal predecessors, (5340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:31,745 INFO L175 Difference]: Start difference. First operand has 153 places, 233 transitions, 3030 flow. Second operand 14 states and 1777 transitions. [2023-11-06 23:07:31,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 245 transitions, 3576 flow [2023-11-06 23:07:31,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 245 transitions, 3394 flow, removed 29 selfloop flow, removed 12 redundant places. [2023-11-06 23:07:31,822 INFO L231 Difference]: Finished difference. Result has 155 places, 233 transitions, 2982 flow [2023-11-06 23:07:31,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=2848, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2982, PETRI_PLACES=155, PETRI_TRANSITIONS=233} [2023-11-06 23:07:31,824 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 134 predicate places. [2023-11-06 23:07:31,824 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 233 transitions, 2982 flow [2023-11-06 23:07:31,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 124.67857142857143) internal successors, (3491), 28 states have internal predecessors, (3491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:31,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:31,825 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:31,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:32,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 23:07:32,032 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:07:32,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:32,032 INFO L85 PathProgramCache]: Analyzing trace with hash -898331253, now seen corresponding path program 10 times [2023-11-06 23:07:32,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:32,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139532123] [2023-11-06 23:07:32,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:32,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:32,668 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:32,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:32,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139532123] [2023-11-06 23:07:32,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139532123] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:32,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669714446] [2023-11-06 23:07:32,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:07:32,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:32,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:32,671 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:32,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 23:07:32,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:07:32,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:32,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 23:07:32,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:33,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:07:33,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:33,129 INFO L322 Elim1Store]: treesize reduction 24, result has 68.8 percent of original size [2023-11-06 23:07:33,129 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 71 [2023-11-06 23:07:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:07:33,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669714446] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:33,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:33,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 5] total 21 [2023-11-06 23:07:33,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866517348] [2023-11-06 23:07:33,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:33,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 23:07:33,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:33,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 23:07:33,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-11-06 23:07:34,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 356 [2023-11-06 23:07:34,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 233 transitions, 2982 flow. Second operand has 22 states, 22 states have (on average 123.36363636363636) internal successors, (2714), 22 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:34,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:34,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 356 [2023-11-06 23:07:34,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:36,092 INFO L124 PetriNetUnfolderBase]: 1302/2457 cut-off events. [2023-11-06 23:07:36,092 INFO L125 PetriNetUnfolderBase]: For 17902/17902 co-relation queries the response was YES. [2023-11-06 23:07:36,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14748 conditions, 2457 events. 1302/2457 cut-off events. For 17902/17902 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 15387 event pairs, 197 based on Foata normal form. 20/2477 useless extension candidates. Maximal degree in co-relation 14678. Up to 1501 conditions per place. [2023-11-06 23:07:36,114 INFO L140 encePairwiseOnDemand]: 344/356 looper letters, 214 selfloop transitions, 89 changer transitions 30/333 dead transitions. [2023-11-06 23:07:36,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 333 transitions, 4533 flow [2023-11-06 23:07:36,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 23:07:36,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 23:07:36,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2404 transitions. [2023-11-06 23:07:36,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35541099940863397 [2023-11-06 23:07:36,119 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2404 transitions. [2023-11-06 23:07:36,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2404 transitions. [2023-11-06 23:07:36,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:36,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2404 transitions. [2023-11-06 23:07:36,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 126.52631578947368) internal successors, (2404), 19 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:36,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 356.0) internal successors, (7120), 20 states have internal predecessors, (7120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:36,132 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 356.0) internal successors, (7120), 20 states have internal predecessors, (7120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:36,132 INFO L175 Difference]: Start difference. First operand has 155 places, 233 transitions, 2982 flow. Second operand 19 states and 2404 transitions. [2023-11-06 23:07:36,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 333 transitions, 4533 flow [2023-11-06 23:07:36,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 333 transitions, 4403 flow, removed 4 selfloop flow, removed 12 redundant places. [2023-11-06 23:07:36,209 INFO L231 Difference]: Finished difference. Result has 167 places, 244 transitions, 3272 flow [2023-11-06 23:07:36,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=2852, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3272, PETRI_PLACES=167, PETRI_TRANSITIONS=244} [2023-11-06 23:07:36,210 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 146 predicate places. [2023-11-06 23:07:36,210 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 244 transitions, 3272 flow [2023-11-06 23:07:36,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 123.36363636363636) internal successors, (2714), 22 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:36,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:36,211 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:36,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:36,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:36,412 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:07:36,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:36,412 INFO L85 PathProgramCache]: Analyzing trace with hash -924559169, now seen corresponding path program 4 times [2023-11-06 23:07:36,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:36,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26062669] [2023-11-06 23:07:36,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:36,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:07:36,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:36,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26062669] [2023-11-06 23:07:36,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26062669] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:36,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324233021] [2023-11-06 23:07:36,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:07:36,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:36,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:36,882 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:36,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 23:07:37,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:07:37,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:37,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 23:07:37,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:07:37,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:37,330 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-06 23:07:37,331 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-06 23:07:37,393 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 23:07:37,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324233021] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:37,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:37,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 17 [2023-11-06 23:07:37,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560852762] [2023-11-06 23:07:37,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:37,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 23:07:37,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:37,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 23:07:37,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:07:39,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 356 [2023-11-06 23:07:39,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 244 transitions, 3272 flow. Second operand has 18 states, 18 states have (on average 144.0) internal successors, (2592), 18 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:39,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:39,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 356 [2023-11-06 23:07:39,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:40,158 INFO L124 PetriNetUnfolderBase]: 1256/2398 cut-off events. [2023-11-06 23:07:40,158 INFO L125 PetriNetUnfolderBase]: For 23187/23187 co-relation queries the response was YES. [2023-11-06 23:07:40,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15415 conditions, 2398 events. 1256/2398 cut-off events. For 23187/23187 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 15071 event pairs, 300 based on Foata normal form. 16/2414 useless extension candidates. Maximal degree in co-relation 15338. Up to 1859 conditions per place. [2023-11-06 23:07:40,182 INFO L140 encePairwiseOnDemand]: 349/356 looper letters, 182 selfloop transitions, 88 changer transitions 16/286 dead transitions. [2023-11-06 23:07:40,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 286 transitions, 4145 flow [2023-11-06 23:07:40,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 23:07:40,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 23:07:40,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1923 transitions. [2023-11-06 23:07:40,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415514261019879 [2023-11-06 23:07:40,232 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1923 transitions. [2023-11-06 23:07:40,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1923 transitions. [2023-11-06 23:07:40,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:40,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1923 transitions. [2023-11-06 23:07:40,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 147.92307692307693) internal successors, (1923), 13 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:40,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 356.0) internal successors, (4984), 14 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:40,241 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 356.0) internal successors, (4984), 14 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:40,241 INFO L175 Difference]: Start difference. First operand has 167 places, 244 transitions, 3272 flow. Second operand 13 states and 1923 transitions. [2023-11-06 23:07:40,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 286 transitions, 4145 flow [2023-11-06 23:07:40,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 286 transitions, 3914 flow, removed 58 selfloop flow, removed 12 redundant places. [2023-11-06 23:07:40,342 INFO L231 Difference]: Finished difference. Result has 167 places, 246 transitions, 3334 flow [2023-11-06 23:07:40,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=3102, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3334, PETRI_PLACES=167, PETRI_TRANSITIONS=246} [2023-11-06 23:07:40,343 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 146 predicate places. [2023-11-06 23:07:40,343 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 246 transitions, 3334 flow [2023-11-06 23:07:40,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 144.0) internal successors, (2592), 18 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:40,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:40,344 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:40,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:40,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-06 23:07:40,551 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:07:40,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:40,552 INFO L85 PathProgramCache]: Analyzing trace with hash -2012566017, now seen corresponding path program 5 times [2023-11-06 23:07:40,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:40,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341963404] [2023-11-06 23:07:40,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:40,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:40,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:07:40,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:40,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341963404] [2023-11-06 23:07:40,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341963404] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:40,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371091695] [2023-11-06 23:07:40,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:07:40,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:40,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:40,885 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:40,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 23:07:41,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 23:07:41,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:41,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 23:07:41,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:41,186 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:07:41,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:41,283 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-06 23:07:41,283 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-06 23:07:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:07:41,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371091695] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:41,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:41,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 5] total 12 [2023-11-06 23:07:41,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435135133] [2023-11-06 23:07:41,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:41,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 23:07:41,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:41,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 23:07:41,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:07:41,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 356 [2023-11-06 23:07:41,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 246 transitions, 3334 flow. Second operand has 13 states, 13 states have (on average 143.76923076923077) internal successors, (1869), 13 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:41,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:41,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 356 [2023-11-06 23:07:41,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:42,610 INFO L124 PetriNetUnfolderBase]: 1358/2580 cut-off events. [2023-11-06 23:07:42,610 INFO L125 PetriNetUnfolderBase]: For 24637/24637 co-relation queries the response was YES. [2023-11-06 23:07:42,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16530 conditions, 2580 events. 1358/2580 cut-off events. For 24637/24637 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 16366 event pairs, 216 based on Foata normal form. 32/2612 useless extension candidates. Maximal degree in co-relation 16454. Up to 1675 conditions per place. [2023-11-06 23:07:42,637 INFO L140 encePairwiseOnDemand]: 349/356 looper letters, 195 selfloop transitions, 119 changer transitions 2/316 dead transitions. [2023-11-06 23:07:42,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 316 transitions, 4600 flow [2023-11-06 23:07:42,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 23:07:42,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 23:07:42,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1927 transitions. [2023-11-06 23:07:42,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41637856525496975 [2023-11-06 23:07:42,642 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1927 transitions. [2023-11-06 23:07:42,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1927 transitions. [2023-11-06 23:07:42,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:42,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1927 transitions. [2023-11-06 23:07:42,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 148.23076923076923) internal successors, (1927), 13 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:42,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 356.0) internal successors, (4984), 14 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:42,651 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 356.0) internal successors, (4984), 14 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:42,651 INFO L175 Difference]: Start difference. First operand has 167 places, 246 transitions, 3334 flow. Second operand 13 states and 1927 transitions. [2023-11-06 23:07:42,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 316 transitions, 4600 flow [2023-11-06 23:07:42,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 316 transitions, 4472 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-11-06 23:07:42,761 INFO L231 Difference]: Finished difference. Result has 175 places, 260 transitions, 3755 flow [2023-11-06 23:07:42,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=3216, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3755, PETRI_PLACES=175, PETRI_TRANSITIONS=260} [2023-11-06 23:07:42,762 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 154 predicate places. [2023-11-06 23:07:42,762 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 260 transitions, 3755 flow [2023-11-06 23:07:42,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 143.76923076923077) internal successors, (1869), 13 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:42,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:42,763 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:42,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:42,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-06 23:07:42,963 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:07:42,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:42,964 INFO L85 PathProgramCache]: Analyzing trace with hash 2036269229, now seen corresponding path program 11 times [2023-11-06 23:07:42,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:42,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220937604] [2023-11-06 23:07:42,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:42,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:43,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:43,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220937604] [2023-11-06 23:07:43,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220937604] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:43,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628230170] [2023-11-06 23:07:43,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:07:43,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:43,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:43,778 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:43,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 23:07:43,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-06 23:07:43,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:43,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 23:07:43,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:44,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:07:44,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:44,565 INFO L322 Elim1Store]: treesize reduction 13, result has 93.8 percent of original size [2023-11-06 23:07:44,565 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 220 [2023-11-06 23:07:52,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 23:07:52,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628230170] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:52,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:52,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 5] total 22 [2023-11-06 23:07:52,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139044245] [2023-11-06 23:07:52,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:52,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 23:07:52,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:52,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 23:07:52,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2023-11-06 23:07:54,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 356 [2023-11-06 23:07:54,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 260 transitions, 3755 flow. Second operand has 23 states, 23 states have (on average 125.26086956521739) internal successors, (2881), 23 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:54,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:54,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 356 [2023-11-06 23:07:54,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:55,732 INFO L124 PetriNetUnfolderBase]: 1350/2572 cut-off events. [2023-11-06 23:07:55,732 INFO L125 PetriNetUnfolderBase]: For 25019/25019 co-relation queries the response was YES. [2023-11-06 23:07:55,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16796 conditions, 2572 events. 1350/2572 cut-off events. For 25019/25019 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 16393 event pairs, 342 based on Foata normal form. 8/2580 useless extension candidates. Maximal degree in co-relation 16715. Up to 2101 conditions per place. [2023-11-06 23:07:55,757 INFO L140 encePairwiseOnDemand]: 346/356 looper letters, 186 selfloop transitions, 92 changer transitions 6/284 dead transitions. [2023-11-06 23:07:55,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 284 transitions, 4372 flow [2023-11-06 23:07:55,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 23:07:55,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 23:07:55,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2298 transitions. [2023-11-06 23:07:55,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3586142322097378 [2023-11-06 23:07:55,761 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2298 transitions. [2023-11-06 23:07:55,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2298 transitions. [2023-11-06 23:07:55,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:55,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2298 transitions. [2023-11-06 23:07:55,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 127.66666666666667) internal successors, (2298), 18 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:55,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 356.0) internal successors, (6764), 19 states have internal predecessors, (6764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:55,826 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 356.0) internal successors, (6764), 19 states have internal predecessors, (6764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:55,826 INFO L175 Difference]: Start difference. First operand has 175 places, 260 transitions, 3755 flow. Second operand 18 states and 2298 transitions. [2023-11-06 23:07:55,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 284 transitions, 4372 flow [2023-11-06 23:07:55,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 284 transitions, 4222 flow, removed 14 selfloop flow, removed 7 redundant places. [2023-11-06 23:07:55,939 INFO L231 Difference]: Finished difference. Result has 187 places, 256 transitions, 3718 flow [2023-11-06 23:07:55,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=3517, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3718, PETRI_PLACES=187, PETRI_TRANSITIONS=256} [2023-11-06 23:07:55,940 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 166 predicate places. [2023-11-06 23:07:55,940 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 256 transitions, 3718 flow [2023-11-06 23:07:55,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 125.26086956521739) internal successors, (2881), 23 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:55,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:55,941 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:55,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:56,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-06 23:07:56,142 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:07:56,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:56,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1230616527, now seen corresponding path program 12 times [2023-11-06 23:07:56,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:56,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202014277] [2023-11-06 23:07:56,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:56,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:56,816 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:56,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:56,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202014277] [2023-11-06 23:07:56,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202014277] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:56,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710584512] [2023-11-06 23:07:56,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:07:56,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:56,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:56,818 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:56,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 23:07:57,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 23:07:57,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:57,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 23:07:57,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:07:57,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:57,638 INFO L322 Elim1Store]: treesize reduction 13, result has 93.8 percent of original size [2023-11-06 23:07:57,638 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 220 [2023-11-06 23:07:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 23:07:58,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710584512] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:58,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:58,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 23 [2023-11-06 23:07:58,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189682321] [2023-11-06 23:07:58,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:58,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 23:07:58,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:58,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 23:07:58,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2023-11-06 23:08:00,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 356 [2023-11-06 23:08:00,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 256 transitions, 3718 flow. Second operand has 24 states, 24 states have (on average 125.25) internal successors, (3006), 24 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:00,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:00,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 356 [2023-11-06 23:08:00,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:01,625 INFO L124 PetriNetUnfolderBase]: 1430/2726 cut-off events. [2023-11-06 23:08:01,625 INFO L125 PetriNetUnfolderBase]: For 28287/28287 co-relation queries the response was YES. [2023-11-06 23:08:01,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17902 conditions, 2726 events. 1430/2726 cut-off events. For 28287/28287 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 17557 event pairs, 294 based on Foata normal form. 96/2822 useless extension candidates. Maximal degree in co-relation 17817. Up to 2085 conditions per place. [2023-11-06 23:08:01,649 INFO L140 encePairwiseOnDemand]: 346/356 looper letters, 204 selfloop transitions, 121 changer transitions 14/339 dead transitions. [2023-11-06 23:08:01,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 339 transitions, 5172 flow [2023-11-06 23:08:01,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 23:08:01,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 23:08:01,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2706 transitions. [2023-11-06 23:08:01,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619582664526485 [2023-11-06 23:08:01,654 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2706 transitions. [2023-11-06 23:08:01,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2706 transitions. [2023-11-06 23:08:01,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:01,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2706 transitions. [2023-11-06 23:08:01,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 128.85714285714286) internal successors, (2706), 21 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:01,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 356.0) internal successors, (7832), 22 states have internal predecessors, (7832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:01,666 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 356.0) internal successors, (7832), 22 states have internal predecessors, (7832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:01,666 INFO L175 Difference]: Start difference. First operand has 187 places, 256 transitions, 3718 flow. Second operand 21 states and 2706 transitions. [2023-11-06 23:08:01,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 339 transitions, 5172 flow [2023-11-06 23:08:01,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 339 transitions, 4966 flow, removed 0 selfloop flow, removed 15 redundant places. [2023-11-06 23:08:01,804 INFO L231 Difference]: Finished difference. Result has 194 places, 275 transitions, 4122 flow [2023-11-06 23:08:01,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=3534, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4122, PETRI_PLACES=194, PETRI_TRANSITIONS=275} [2023-11-06 23:08:01,805 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 173 predicate places. [2023-11-06 23:08:01,805 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 275 transitions, 4122 flow [2023-11-06 23:08:01,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 125.25) internal successors, (3006), 24 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:01,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:01,806 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:01,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:02,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-06 23:08:02,012 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:08:02,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:02,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1896340849, now seen corresponding path program 13 times [2023-11-06 23:08:02,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:02,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738939446] [2023-11-06 23:08:02,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:02,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:02,718 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:02,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:02,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738939446] [2023-11-06 23:08:02,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738939446] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:02,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355226934] [2023-11-06 23:08:02,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:08:02,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:02,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:02,719 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:02,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 23:08:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:02,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 23:08:02,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:03,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:03,473 INFO L322 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2023-11-06 23:08:03,473 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 90 [2023-11-06 23:08:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:03,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355226934] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:03,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:03,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-11-06 23:08:03,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884516718] [2023-11-06 23:08:03,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:03,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-06 23:08:03,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:03,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-06 23:08:03,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 23:08:06,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 356 [2023-11-06 23:08:06,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 275 transitions, 4122 flow. Second operand has 33 states, 33 states have (on average 123.6969696969697) internal successors, (4082), 33 states have internal predecessors, (4082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:06,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:06,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 356 [2023-11-06 23:08:06,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:07,712 INFO L124 PetriNetUnfolderBase]: 1432/2746 cut-off events. [2023-11-06 23:08:07,713 INFO L125 PetriNetUnfolderBase]: For 39179/39179 co-relation queries the response was YES. [2023-11-06 23:08:07,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19676 conditions, 2746 events. 1432/2746 cut-off events. For 39179/39179 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17838 event pairs, 392 based on Foata normal form. 4/2750 useless extension candidates. Maximal degree in co-relation 19587. Up to 2616 conditions per place. [2023-11-06 23:08:07,741 INFO L140 encePairwiseOnDemand]: 346/356 looper letters, 245 selfloop transitions, 34 changer transitions 19/298 dead transitions. [2023-11-06 23:08:07,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 298 transitions, 4984 flow [2023-11-06 23:08:07,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 23:08:07,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 23:08:07,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1631 transitions. [2023-11-06 23:08:07,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3524200518582541 [2023-11-06 23:08:07,744 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1631 transitions. [2023-11-06 23:08:07,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1631 transitions. [2023-11-06 23:08:07,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:07,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1631 transitions. [2023-11-06 23:08:07,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 125.46153846153847) internal successors, (1631), 13 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:07,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 356.0) internal successors, (4984), 14 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:07,750 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 356.0) internal successors, (4984), 14 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:07,750 INFO L175 Difference]: Start difference. First operand has 194 places, 275 transitions, 4122 flow. Second operand 13 states and 1631 transitions. [2023-11-06 23:08:07,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 298 transitions, 4984 flow [2023-11-06 23:08:07,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 298 transitions, 4764 flow, removed 38 selfloop flow, removed 14 redundant places. [2023-11-06 23:08:07,885 INFO L231 Difference]: Finished difference. Result has 195 places, 275 transitions, 4001 flow [2023-11-06 23:08:07,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=3902, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4001, PETRI_PLACES=195, PETRI_TRANSITIONS=275} [2023-11-06 23:08:07,885 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 174 predicate places. [2023-11-06 23:08:07,886 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 275 transitions, 4001 flow [2023-11-06 23:08:07,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 123.6969696969697) internal successors, (4082), 33 states have internal predecessors, (4082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:07,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:07,886 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:07,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-06 23:08:08,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:08,087 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:08:08,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:08,087 INFO L85 PathProgramCache]: Analyzing trace with hash -355224123, now seen corresponding path program 14 times [2023-11-06 23:08:08,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:08,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953221092] [2023-11-06 23:08:08,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:08,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:08,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:08,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953221092] [2023-11-06 23:08:08,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953221092] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:08,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753402913] [2023-11-06 23:08:08,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:08:08,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:08,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:08,729 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:08,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 23:08:08,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:08:08,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:08,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 23:08:08,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:09,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:09,409 INFO L322 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-06 23:08:09,409 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 84 [2023-11-06 23:08:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:09,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753402913] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:09,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:09,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-11-06 23:08:09,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014235758] [2023-11-06 23:08:09,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:09,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-06 23:08:09,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:09,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-06 23:08:09,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 23:08:12,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 356 [2023-11-06 23:08:12,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 275 transitions, 4001 flow. Second operand has 33 states, 33 states have (on average 122.6969696969697) internal successors, (4049), 33 states have internal predecessors, (4049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:12,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:12,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 356 [2023-11-06 23:08:12,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:13,563 INFO L124 PetriNetUnfolderBase]: 1408/2692 cut-off events. [2023-11-06 23:08:13,564 INFO L125 PetriNetUnfolderBase]: For 41484/41484 co-relation queries the response was YES. [2023-11-06 23:08:13,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19496 conditions, 2692 events. 1408/2692 cut-off events. For 41484/41484 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 17397 event pairs, 366 based on Foata normal form. 4/2696 useless extension candidates. Maximal degree in co-relation 19403. Up to 2550 conditions per place. [2023-11-06 23:08:13,590 INFO L140 encePairwiseOnDemand]: 346/356 looper letters, 247 selfloop transitions, 43 changer transitions 10/300 dead transitions. [2023-11-06 23:08:13,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 300 transitions, 4877 flow [2023-11-06 23:08:13,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 23:08:13,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 23:08:13,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1624 transitions. [2023-11-06 23:08:13,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3509075194468453 [2023-11-06 23:08:13,594 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1624 transitions. [2023-11-06 23:08:13,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1624 transitions. [2023-11-06 23:08:13,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:13,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1624 transitions. [2023-11-06 23:08:13,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 124.92307692307692) internal successors, (1624), 13 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:13,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 356.0) internal successors, (4984), 14 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:13,601 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 356.0) internal successors, (4984), 14 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:13,602 INFO L175 Difference]: Start difference. First operand has 195 places, 275 transitions, 4001 flow. Second operand 13 states and 1624 transitions. [2023-11-06 23:08:13,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 300 transitions, 4877 flow [2023-11-06 23:08:13,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 300 transitions, 4767 flow, removed 21 selfloop flow, removed 11 redundant places. [2023-11-06 23:08:13,754 INFO L231 Difference]: Finished difference. Result has 196 places, 278 transitions, 4080 flow [2023-11-06 23:08:13,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=3915, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4080, PETRI_PLACES=196, PETRI_TRANSITIONS=278} [2023-11-06 23:08:13,755 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 175 predicate places. [2023-11-06 23:08:13,755 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 278 transitions, 4080 flow [2023-11-06 23:08:13,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 122.6969696969697) internal successors, (4049), 33 states have internal predecessors, (4049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:13,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:13,756 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:13,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:13,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:13,957 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:08:13,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:13,957 INFO L85 PathProgramCache]: Analyzing trace with hash -687509397, now seen corresponding path program 15 times [2023-11-06 23:08:13,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:13,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364928897] [2023-11-06 23:08:13,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:13,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:14,649 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:14,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:14,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364928897] [2023-11-06 23:08:14,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364928897] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:14,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260898334] [2023-11-06 23:08:14,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:08:14,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:14,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:14,651 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:14,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 23:08:14,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 23:08:14,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:14,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-06 23:08:14,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:15,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:15,653 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-06 23:08:15,654 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-06 23:08:15,679 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-06 23:08:15,679 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-11-06 23:08:15,686 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-06 23:08:15,687 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-11-06 23:08:16,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:16,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260898334] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:16,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:16,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 30 [2023-11-06 23:08:16,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481248633] [2023-11-06 23:08:16,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:16,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-06 23:08:16,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:16,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-06 23:08:16,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2023-11-06 23:08:18,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 356 [2023-11-06 23:08:18,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 278 transitions, 4080 flow. Second operand has 31 states, 31 states have (on average 122.64516129032258) internal successors, (3802), 31 states have internal predecessors, (3802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:18,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:18,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 356 [2023-11-06 23:08:18,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:19,458 INFO L124 PetriNetUnfolderBase]: 1442/2778 cut-off events. [2023-11-06 23:08:19,458 INFO L125 PetriNetUnfolderBase]: For 48474/48474 co-relation queries the response was YES. [2023-11-06 23:08:19,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20391 conditions, 2778 events. 1442/2778 cut-off events. For 48474/48474 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18254 event pairs, 354 based on Foata normal form. 24/2802 useless extension candidates. Maximal degree in co-relation 20297. Up to 2458 conditions per place. [2023-11-06 23:08:19,490 INFO L140 encePairwiseOnDemand]: 345/356 looper letters, 250 selfloop transitions, 69 changer transitions 2/321 dead transitions. [2023-11-06 23:08:19,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 321 transitions, 5193 flow [2023-11-06 23:08:19,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 23:08:19,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 23:08:19,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1885 transitions. [2023-11-06 23:08:19,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3529962546816479 [2023-11-06 23:08:19,494 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1885 transitions. [2023-11-06 23:08:19,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1885 transitions. [2023-11-06 23:08:19,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:19,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1885 transitions. [2023-11-06 23:08:19,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 125.66666666666667) internal successors, (1885), 15 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:19,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 356.0) internal successors, (5696), 16 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:19,499 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 356.0) internal successors, (5696), 16 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:19,499 INFO L175 Difference]: Start difference. First operand has 196 places, 278 transitions, 4080 flow. Second operand 15 states and 1885 transitions. [2023-11-06 23:08:19,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 321 transitions, 5193 flow [2023-11-06 23:08:19,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 321 transitions, 5033 flow, removed 37 selfloop flow, removed 11 redundant places. [2023-11-06 23:08:19,653 INFO L231 Difference]: Finished difference. Result has 201 places, 287 transitions, 4282 flow [2023-11-06 23:08:19,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=3960, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4282, PETRI_PLACES=201, PETRI_TRANSITIONS=287} [2023-11-06 23:08:19,653 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 180 predicate places. [2023-11-06 23:08:19,654 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 287 transitions, 4282 flow [2023-11-06 23:08:19,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 122.64516129032258) internal successors, (3802), 31 states have internal predecessors, (3802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:19,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:19,654 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:19,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:19,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-06 23:08:19,855 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:08:19,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:19,855 INFO L85 PathProgramCache]: Analyzing trace with hash 113512185, now seen corresponding path program 6 times [2023-11-06 23:08:19,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:19,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145414955] [2023-11-06 23:08:19,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:19,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:19,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:20,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:08:20,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:20,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145414955] [2023-11-06 23:08:20,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145414955] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:20,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897174064] [2023-11-06 23:08:20,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:08:20,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:20,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:20,209 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:20,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 23:08:20,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 23:08:20,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:20,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 23:08:20,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:20,533 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 23:08:20,568 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:08:20,612 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:08:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:08:20,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:21,086 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:08:21,087 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 80 [2023-11-06 23:08:21,155 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-06 23:08:21,155 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 892 treesize of output 796 [2023-11-06 23:08:21,182 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:08:21,185 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:08:21,210 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:08:21,210 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 748 treesize of output 572 [2023-11-06 23:08:21,235 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:08:21,238 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:08:21,267 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:08:21,268 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 524 treesize of output 460 [2023-11-06 23:08:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 2 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:08:23,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897174064] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:23,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:23,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 26 [2023-11-06 23:08:23,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972387922] [2023-11-06 23:08:23,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:23,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 23:08:23,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:23,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 23:08:23,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=541, Unknown=8, NotChecked=0, Total=702 [2023-11-06 23:08:23,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 356 [2023-11-06 23:08:23,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 287 transitions, 4282 flow. Second operand has 27 states, 27 states have (on average 101.92592592592592) internal successors, (2752), 27 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:23,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:23,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 356 [2023-11-06 23:08:23,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:25,386 INFO L124 PetriNetUnfolderBase]: 1580/3069 cut-off events. [2023-11-06 23:08:25,386 INFO L125 PetriNetUnfolderBase]: For 59308/59308 co-relation queries the response was YES. [2023-11-06 23:08:25,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23013 conditions, 3069 events. 1580/3069 cut-off events. For 59308/59308 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 20447 event pairs, 360 based on Foata normal form. 32/3101 useless extension candidates. Maximal degree in co-relation 22917. Up to 2558 conditions per place. [2023-11-06 23:08:25,425 INFO L140 encePairwiseOnDemand]: 346/356 looper letters, 277 selfloop transitions, 81 changer transitions 16/374 dead transitions. [2023-11-06 23:08:25,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 374 transitions, 5919 flow [2023-11-06 23:08:25,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 23:08:25,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 23:08:25,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2109 transitions. [2023-11-06 23:08:25,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2962078651685393 [2023-11-06 23:08:25,429 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2109 transitions. [2023-11-06 23:08:25,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2109 transitions. [2023-11-06 23:08:25,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:25,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2109 transitions. [2023-11-06 23:08:25,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 105.45) internal successors, (2109), 20 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:25,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 356.0) internal successors, (7476), 21 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:25,439 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 356.0) internal successors, (7476), 21 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:25,440 INFO L175 Difference]: Start difference. First operand has 201 places, 287 transitions, 4282 flow. Second operand 20 states and 2109 transitions. [2023-11-06 23:08:25,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 374 transitions, 5919 flow [2023-11-06 23:08:25,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 374 transitions, 5745 flow, removed 33 selfloop flow, removed 11 redundant places. [2023-11-06 23:08:25,703 INFO L231 Difference]: Finished difference. Result has 217 places, 312 transitions, 4684 flow [2023-11-06 23:08:25,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=4100, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4684, PETRI_PLACES=217, PETRI_TRANSITIONS=312} [2023-11-06 23:08:25,704 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 196 predicate places. [2023-11-06 23:08:25,704 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 312 transitions, 4684 flow [2023-11-06 23:08:25,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 101.92592592592592) internal successors, (2752), 27 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:25,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:25,705 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:25,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:25,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:25,905 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:08:25,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:25,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1715590937, now seen corresponding path program 16 times [2023-11-06 23:08:25,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:25,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593426623] [2023-11-06 23:08:25,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:25,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:25,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:26,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:26,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593426623] [2023-11-06 23:08:26,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593426623] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:26,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866376708] [2023-11-06 23:08:26,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:08:26,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:26,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:26,625 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:26,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-06 23:08:26,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:08:26,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:26,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 23:08:26,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:08:26,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:27,288 INFO L322 Elim1Store]: treesize reduction 13, result has 93.8 percent of original size [2023-11-06 23:08:27,288 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 220 [2023-11-06 23:08:37,988 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 23:08:37,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866376708] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:37,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:37,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 5] total 21 [2023-11-06 23:08:37,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839214368] [2023-11-06 23:08:37,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:37,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 23:08:37,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:37,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 23:08:37,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-11-06 23:08:39,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 356 [2023-11-06 23:08:39,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 312 transitions, 4684 flow. Second operand has 22 states, 22 states have (on average 125.36363636363636) internal successors, (2758), 22 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:39,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:39,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 356 [2023-11-06 23:08:39,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:40,936 INFO L124 PetriNetUnfolderBase]: 1544/2973 cut-off events. [2023-11-06 23:08:40,936 INFO L125 PetriNetUnfolderBase]: For 60516/60516 co-relation queries the response was YES. [2023-11-06 23:08:40,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23080 conditions, 2973 events. 1544/2973 cut-off events. For 60516/60516 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19424 event pairs, 362 based on Foata normal form. 12/2985 useless extension candidates. Maximal degree in co-relation 22976. Up to 2303 conditions per place. [2023-11-06 23:08:40,968 INFO L140 encePairwiseOnDemand]: 345/356 looper letters, 256 selfloop transitions, 88 changer transitions 8/352 dead transitions. [2023-11-06 23:08:40,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 352 transitions, 5859 flow [2023-11-06 23:08:40,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 23:08:40,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 23:08:40,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2289 transitions. [2023-11-06 23:08:40,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35720973782771537 [2023-11-06 23:08:40,972 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2289 transitions. [2023-11-06 23:08:40,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2289 transitions. [2023-11-06 23:08:40,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:40,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2289 transitions. [2023-11-06 23:08:40,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 127.16666666666667) internal successors, (2289), 18 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:40,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 356.0) internal successors, (6764), 19 states have internal predecessors, (6764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:40,979 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 356.0) internal successors, (6764), 19 states have internal predecessors, (6764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:40,980 INFO L175 Difference]: Start difference. First operand has 217 places, 312 transitions, 4684 flow. Second operand 18 states and 2289 transitions. [2023-11-06 23:08:40,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 352 transitions, 5859 flow [2023-11-06 23:08:41,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 352 transitions, 5666 flow, removed 52 selfloop flow, removed 10 redundant places. [2023-11-06 23:08:41,174 INFO L231 Difference]: Finished difference. Result has 225 places, 315 transitions, 4796 flow [2023-11-06 23:08:41,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=4466, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4796, PETRI_PLACES=225, PETRI_TRANSITIONS=315} [2023-11-06 23:08:41,175 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 204 predicate places. [2023-11-06 23:08:41,175 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 315 transitions, 4796 flow [2023-11-06 23:08:41,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 125.36363636363636) internal successors, (2758), 22 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:41,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:41,176 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:41,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:41,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-06 23:08:41,376 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:08:41,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:41,377 INFO L85 PathProgramCache]: Analyzing trace with hash 576557237, now seen corresponding path program 7 times [2023-11-06 23:08:41,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:41,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966841748] [2023-11-06 23:08:41,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:41,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:41,802 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:08:41,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:41,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966841748] [2023-11-06 23:08:41,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966841748] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:41,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868790568] [2023-11-06 23:08:41,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:08:41,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:41,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:41,805 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:41,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-06 23:08:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:41,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 23:08:41,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:08:42,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:42,271 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-06 23:08:42,272 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-06 23:08:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:08:42,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868790568] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:42,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:42,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 18 [2023-11-06 23:08:42,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991201503] [2023-11-06 23:08:42,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:42,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 23:08:42,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:42,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 23:08:42,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:08:43,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 356 [2023-11-06 23:08:43,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 315 transitions, 4796 flow. Second operand has 19 states, 19 states have (on average 143.52631578947367) internal successors, (2727), 19 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:43,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:43,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 356 [2023-11-06 23:08:43,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:44,451 INFO L124 PetriNetUnfolderBase]: 1692/3235 cut-off events. [2023-11-06 23:08:44,451 INFO L125 PetriNetUnfolderBase]: For 77561/77561 co-relation queries the response was YES. [2023-11-06 23:08:44,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25982 conditions, 3235 events. 1692/3235 cut-off events. For 77561/77561 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 21196 event pairs, 304 based on Foata normal form. 84/3319 useless extension candidates. Maximal degree in co-relation 25876. Up to 1909 conditions per place. [2023-11-06 23:08:44,491 INFO L140 encePairwiseOnDemand]: 349/356 looper letters, 296 selfloop transitions, 124 changer transitions 1/421 dead transitions. [2023-11-06 23:08:44,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 421 transitions, 7125 flow [2023-11-06 23:08:44,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 23:08:44,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 23:08:44,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2645 transitions. [2023-11-06 23:08:44,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127652933832709 [2023-11-06 23:08:44,496 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2645 transitions. [2023-11-06 23:08:44,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2645 transitions. [2023-11-06 23:08:44,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:44,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2645 transitions. [2023-11-06 23:08:44,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 146.94444444444446) internal successors, (2645), 18 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:44,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 356.0) internal successors, (6764), 19 states have internal predecessors, (6764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:44,506 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 356.0) internal successors, (6764), 19 states have internal predecessors, (6764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:44,506 INFO L175 Difference]: Start difference. First operand has 225 places, 315 transitions, 4796 flow. Second operand 18 states and 2645 transitions. [2023-11-06 23:08:44,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 421 transitions, 7125 flow [2023-11-06 23:08:44,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 421 transitions, 6853 flow, removed 46 selfloop flow, removed 17 redundant places. [2023-11-06 23:08:44,783 INFO L231 Difference]: Finished difference. Result has 227 places, 349 transitions, 5436 flow [2023-11-06 23:08:44,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=4556, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5436, PETRI_PLACES=227, PETRI_TRANSITIONS=349} [2023-11-06 23:08:44,784 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 206 predicate places. [2023-11-06 23:08:44,784 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 349 transitions, 5436 flow [2023-11-06 23:08:44,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 143.52631578947367) internal successors, (2727), 19 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:44,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:44,785 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:44,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:44,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-06 23:08:44,985 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:08:44,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:44,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1469304117, now seen corresponding path program 8 times [2023-11-06 23:08:44,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:44,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261494311] [2023-11-06 23:08:44,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:44,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:08:45,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:45,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261494311] [2023-11-06 23:08:45,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261494311] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:45,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374397923] [2023-11-06 23:08:45,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:08:45,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:45,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:45,330 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:45,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-06 23:08:45,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:08:45,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:45,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 23:08:45,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:45,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:08:45,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:45,764 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-06 23:08:45,764 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-06 23:08:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 23:08:45,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374397923] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:45,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:45,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 5] total 18 [2023-11-06 23:08:45,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913694030] [2023-11-06 23:08:45,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:45,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 23:08:45,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:45,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 23:08:45,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:08:47,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 356 [2023-11-06 23:08:47,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 349 transitions, 5436 flow. Second operand has 19 states, 19 states have (on average 143.52631578947367) internal successors, (2727), 19 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:47,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:47,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 356 [2023-11-06 23:08:47,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:48,498 INFO L124 PetriNetUnfolderBase]: 1624/3067 cut-off events. [2023-11-06 23:08:48,498 INFO L125 PetriNetUnfolderBase]: For 72951/72951 co-relation queries the response was YES. [2023-11-06 23:08:48,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25104 conditions, 3067 events. 1624/3067 cut-off events. For 72951/72951 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 19699 event pairs, 340 based on Foata normal form. 48/3115 useless extension candidates. Maximal degree in co-relation 24996. Up to 2491 conditions per place. [2023-11-06 23:08:48,535 INFO L140 encePairwiseOnDemand]: 349/356 looper letters, 284 selfloop transitions, 93 changer transitions 1/378 dead transitions. [2023-11-06 23:08:48,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 378 transitions, 6507 flow [2023-11-06 23:08:48,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 23:08:48,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 23:08:48,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2341 transitions. [2023-11-06 23:08:48,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41099016853932585 [2023-11-06 23:08:48,539 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2341 transitions. [2023-11-06 23:08:48,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2341 transitions. [2023-11-06 23:08:48,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:48,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2341 transitions. [2023-11-06 23:08:48,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 146.3125) internal successors, (2341), 16 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:48,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 356.0) internal successors, (6052), 17 states have internal predecessors, (6052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:48,547 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 356.0) internal successors, (6052), 17 states have internal predecessors, (6052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:48,547 INFO L175 Difference]: Start difference. First operand has 227 places, 349 transitions, 5436 flow. Second operand 16 states and 2341 transitions. [2023-11-06 23:08:48,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 378 transitions, 6507 flow [2023-11-06 23:08:48,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 378 transitions, 6063 flow, removed 112 selfloop flow, removed 14 redundant places. [2023-11-06 23:08:48,780 INFO L231 Difference]: Finished difference. Result has 228 places, 345 transitions, 5177 flow [2023-11-06 23:08:48,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=4953, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5177, PETRI_PLACES=228, PETRI_TRANSITIONS=345} [2023-11-06 23:08:48,780 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 207 predicate places. [2023-11-06 23:08:48,781 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 345 transitions, 5177 flow [2023-11-06 23:08:48,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 143.52631578947367) internal successors, (2727), 19 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:48,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:48,781 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:48,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:48,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-11-06 23:08:48,982 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:08:48,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:48,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1823929323, now seen corresponding path program 17 times [2023-11-06 23:08:48,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:48,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591600082] [2023-11-06 23:08:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:48,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:49,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:49,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:49,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591600082] [2023-11-06 23:08:49,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591600082] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:49,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146271752] [2023-11-06 23:08:49,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:08:49,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:49,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:49,833 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:49,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-06 23:08:50,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 23:08:50,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:50,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 23:08:50,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:50,061 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-06 23:08:50,321 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 23:08:50,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:08:50,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:50,718 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~B~0.offset (* c_~i_AB~0 4)))) (let ((.cse1 (forall ((v_ArrVal_1368 (Array Int Int)) (~B~0.base Int)) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1368) ~B~0.base) .cse3))))) (.cse0 (+ c_~i_BA~0 1))) (and (or (< .cse0 c_~An~0) .cse1) (or .cse1 (< .cse0 c_~Bn~0)) (forall ((v_ArrVal_1368 (Array Int Int)) (~B~0.base Int)) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1368))) (let ((.cse2 (select .cse5 ~B~0.base))) (or (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse2 .cse3))) (let ((.cse4 (* c_~i_BA~0 4))) (= (select .cse2 (+ .cse4 4 c_~B~0.offset)) (select (select .cse5 c_~A~0.base) (+ c_~A~0.offset .cse4 4))))))))))) is different from false [2023-11-06 23:08:50,905 INFO L322 Elim1Store]: treesize reduction 26, result has 86.7 percent of original size [2023-11-06 23:08:50,905 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 263 treesize of output 324 [2023-11-06 23:08:50,939 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:08:50,940 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 155 treesize of output 157 [2023-11-06 23:08:50,955 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 115 [2023-11-06 23:08:50,971 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 109 [2023-11-06 23:08:54,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:08:54,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146271752] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:54,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:54,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 27 [2023-11-06 23:08:54,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277811086] [2023-11-06 23:08:54,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:54,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 23:08:54,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:54,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 23:08:54,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=618, Unknown=1, NotChecked=50, Total=756 [2023-11-06 23:08:54,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 356 [2023-11-06 23:08:54,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 345 transitions, 5177 flow. Second operand has 28 states, 28 states have (on average 93.96428571428571) internal successors, (2631), 28 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:54,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:54,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 356 [2023-11-06 23:08:54,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:56,624 INFO L124 PetriNetUnfolderBase]: 1846/3469 cut-off events. [2023-11-06 23:08:56,624 INFO L125 PetriNetUnfolderBase]: For 87789/87789 co-relation queries the response was YES. [2023-11-06 23:08:56,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27918 conditions, 3469 events. 1846/3469 cut-off events. For 87789/87789 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 22818 event pairs, 300 based on Foata normal form. 80/3549 useless extension candidates. Maximal degree in co-relation 27815. Up to 2145 conditions per place. [2023-11-06 23:08:56,666 INFO L140 encePairwiseOnDemand]: 344/356 looper letters, 274 selfloop transitions, 178 changer transitions 3/455 dead transitions. [2023-11-06 23:08:56,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 455 transitions, 7699 flow [2023-11-06 23:08:56,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 23:08:56,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 23:08:56,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1856 transitions. [2023-11-06 23:08:56,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2743938497930219 [2023-11-06 23:08:56,669 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1856 transitions. [2023-11-06 23:08:56,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1856 transitions. [2023-11-06 23:08:56,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:56,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1856 transitions. [2023-11-06 23:08:56,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 97.6842105263158) internal successors, (1856), 19 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:56,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 356.0) internal successors, (7120), 20 states have internal predecessors, (7120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:56,678 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 356.0) internal successors, (7120), 20 states have internal predecessors, (7120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:56,679 INFO L175 Difference]: Start difference. First operand has 228 places, 345 transitions, 5177 flow. Second operand 19 states and 1856 transitions. [2023-11-06 23:08:56,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 455 transitions, 7699 flow [2023-11-06 23:08:56,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 455 transitions, 7549 flow, removed 4 selfloop flow, removed 11 redundant places. [2023-11-06 23:08:56,945 INFO L231 Difference]: Finished difference. Result has 239 places, 384 transitions, 6134 flow [2023-11-06 23:08:56,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=5027, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6134, PETRI_PLACES=239, PETRI_TRANSITIONS=384} [2023-11-06 23:08:56,946 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 218 predicate places. [2023-11-06 23:08:56,946 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 384 transitions, 6134 flow [2023-11-06 23:08:56,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 93.96428571428571) internal successors, (2631), 28 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:56,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:56,947 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:56,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:57,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:57,147 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:08:57,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:57,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1913953675, now seen corresponding path program 9 times [2023-11-06 23:08:57,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:57,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986195590] [2023-11-06 23:08:57,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:57,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:08:57,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:57,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986195590] [2023-11-06 23:08:57,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986195590] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:57,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964005453] [2023-11-06 23:08:57,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:08:57,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:57,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:57,663 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:57,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-06 23:08:57,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 23:08:57,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:57,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 23:08:57,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:58,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:58,030 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 23:08:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:08:58,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:58,232 WARN L839 $PredicateComparison]: unable to prove that (forall ((~B~0.offset Int) (~B~0.base Int) (v_ArrVal_1409 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1409))) (let ((.cse0 (select .cse2 ~B~0.base))) (or (not (let ((.cse1 (* c_~i_BA~0 4))) (= (select .cse0 (+ .cse1 ~B~0.offset 4)) (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse1 4))))) (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse0 (+ ~B~0.offset (* c_~i_AB~0 4)))))))) is different from false [2023-11-06 23:08:58,275 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:08:58,276 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 178 [2023-11-06 23:08:58,300 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:08:58,300 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 89 [2023-11-06 23:08:58,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:08:58,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964005453] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:58,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:58,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 24 [2023-11-06 23:08:58,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206901480] [2023-11-06 23:08:58,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:58,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 23:08:58,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:58,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 23:08:58,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=481, Unknown=1, NotChecked=44, Total=600 [2023-11-06 23:08:59,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 356 [2023-11-06 23:08:59,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 384 transitions, 6134 flow. Second operand has 25 states, 25 states have (on average 119.92) internal successors, (2998), 25 states have internal predecessors, (2998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:59,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:59,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 356 [2023-11-06 23:08:59,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:00,646 INFO L124 PetriNetUnfolderBase]: 1856/3507 cut-off events. [2023-11-06 23:09:00,646 INFO L125 PetriNetUnfolderBase]: For 105273/105273 co-relation queries the response was YES. [2023-11-06 23:09:00,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30769 conditions, 3507 events. 1856/3507 cut-off events. For 105273/105273 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23263 event pairs, 435 based on Foata normal form. 8/3515 useless extension candidates. Maximal degree in co-relation 30660. Up to 2940 conditions per place. [2023-11-06 23:09:00,690 INFO L140 encePairwiseOnDemand]: 348/356 looper letters, 291 selfloop transitions, 117 changer transitions 14/422 dead transitions. [2023-11-06 23:09:00,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 422 transitions, 7310 flow [2023-11-06 23:09:00,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 23:09:00,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 23:09:00,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1613 transitions. [2023-11-06 23:09:00,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3485306828003457 [2023-11-06 23:09:00,693 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1613 transitions. [2023-11-06 23:09:00,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1613 transitions. [2023-11-06 23:09:00,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:00,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1613 transitions. [2023-11-06 23:09:00,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 124.07692307692308) internal successors, (1613), 13 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:00,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 356.0) internal successors, (4984), 14 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:00,698 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 356.0) internal successors, (4984), 14 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:00,698 INFO L175 Difference]: Start difference. First operand has 239 places, 384 transitions, 6134 flow. Second operand 13 states and 1613 transitions. [2023-11-06 23:09:00,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 422 transitions, 7310 flow [2023-11-06 23:09:01,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 422 transitions, 6985 flow, removed 79 selfloop flow, removed 10 redundant places. [2023-11-06 23:09:01,063 INFO L231 Difference]: Finished difference. Result has 241 places, 382 transitions, 6031 flow [2023-11-06 23:09:01,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=5811, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6031, PETRI_PLACES=241, PETRI_TRANSITIONS=382} [2023-11-06 23:09:01,064 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 220 predicate places. [2023-11-06 23:09:01,064 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 382 transitions, 6031 flow [2023-11-06 23:09:01,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 119.92) internal successors, (2998), 25 states have internal predecessors, (2998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:01,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:01,065 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:01,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:01,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:01,265 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:09:01,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:01,265 INFO L85 PathProgramCache]: Analyzing trace with hash 780575767, now seen corresponding path program 10 times [2023-11-06 23:09:01,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:01,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433570170] [2023-11-06 23:09:01,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:01,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:09:01,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:01,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433570170] [2023-11-06 23:09:01,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433570170] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:01,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999729919] [2023-11-06 23:09:01,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:09:01,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:01,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:01,848 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:01,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-06 23:09:02,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:09:02,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:02,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-06 23:09:02,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:02,052 INFO L322 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-06 23:09:02,052 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2023-11-06 23:09:02,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:02,072 INFO L322 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2023-11-06 23:09:02,073 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-06 23:09:02,084 INFO L322 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2023-11-06 23:09:02,085 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 23:09:02,143 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 23:09:02,143 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 23:09:02,346 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 23:09:02,346 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 21 [2023-11-06 23:09:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:09:02,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:02,629 INFO L322 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-11-06 23:09:02,629 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 130 treesize of output 145 [2023-11-06 23:09:02,644 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:09:02,645 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 55 [2023-11-06 23:09:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:09:02,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999729919] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:02,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:02,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-06 23:09:02,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995511961] [2023-11-06 23:09:02,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:02,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 23:09:02,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:02,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 23:09:02,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=517, Unknown=3, NotChecked=0, Total=600 [2023-11-06 23:09:05,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 356 [2023-11-06 23:09:05,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 382 transitions, 6031 flow. Second operand has 25 states, 25 states have (on average 111.88) internal successors, (2797), 25 states have internal predecessors, (2797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:05,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:05,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 356 [2023-11-06 23:09:05,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:06,587 INFO L124 PetriNetUnfolderBase]: 1832/3454 cut-off events. [2023-11-06 23:09:06,587 INFO L125 PetriNetUnfolderBase]: For 101235/101235 co-relation queries the response was YES. [2023-11-06 23:09:06,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29960 conditions, 3454 events. 1832/3454 cut-off events. For 101235/101235 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 22727 event pairs, 439 based on Foata normal form. 8/3462 useless extension candidates. Maximal degree in co-relation 29852. Up to 2920 conditions per place. [2023-11-06 23:09:06,633 INFO L140 encePairwiseOnDemand]: 350/356 looper letters, 291 selfloop transitions, 111 changer transitions 15/417 dead transitions. [2023-11-06 23:09:06,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 417 transitions, 7174 flow [2023-11-06 23:09:06,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 23:09:06,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 23:09:06,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1397 transitions. [2023-11-06 23:09:06,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3270131086142322 [2023-11-06 23:09:06,636 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1397 transitions. [2023-11-06 23:09:06,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1397 transitions. [2023-11-06 23:09:06,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:06,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1397 transitions. [2023-11-06 23:09:06,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 116.41666666666667) internal successors, (1397), 12 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:06,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 356.0) internal successors, (4628), 13 states have internal predecessors, (4628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:06,642 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 356.0) internal successors, (4628), 13 states have internal predecessors, (4628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:06,643 INFO L175 Difference]: Start difference. First operand has 241 places, 382 transitions, 6031 flow. Second operand 12 states and 1397 transitions. [2023-11-06 23:09:06,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 417 transitions, 7174 flow [2023-11-06 23:09:07,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 417 transitions, 6916 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-11-06 23:09:07,011 INFO L231 Difference]: Finished difference. Result has 240 places, 378 transitions, 5950 flow [2023-11-06 23:09:07,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=5776, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5950, PETRI_PLACES=240, PETRI_TRANSITIONS=378} [2023-11-06 23:09:07,012 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 219 predicate places. [2023-11-06 23:09:07,012 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 378 transitions, 5950 flow [2023-11-06 23:09:07,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 111.88) internal successors, (2797), 25 states have internal predecessors, (2797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:07,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:07,013 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:07,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:07,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:07,219 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:09:07,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:07,219 INFO L85 PathProgramCache]: Analyzing trace with hash -150987887, now seen corresponding path program 18 times [2023-11-06 23:09:07,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:07,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107618092] [2023-11-06 23:09:07,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:07,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:08,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:08,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107618092] [2023-11-06 23:09:08,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107618092] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:08,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526532056] [2023-11-06 23:09:08,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:09:08,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:08,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:08,158 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:08,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-06 23:09:08,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 23:09:08,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:08,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 23:09:08,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:08,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:08,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:08,712 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 23:09:08,713 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2023-11-06 23:09:08,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:09:08,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:09,258 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:09:09,259 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 179 treesize of output 298 [2023-11-06 23:09:09,283 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:09:09,284 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 76 [2023-11-06 23:09:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:09:10,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526532056] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:10,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:10,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 29 [2023-11-06 23:09:10,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819981463] [2023-11-06 23:09:10,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:10,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 23:09:10,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:10,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 23:09:10,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=787, Unknown=2, NotChecked=0, Total=870 [2023-11-06 23:09:17,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 356 [2023-11-06 23:09:17,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 378 transitions, 5950 flow. Second operand has 30 states, 30 states have (on average 91.8) internal successors, (2754), 30 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:17,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:17,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 356 [2023-11-06 23:09:17,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:20,042 INFO L124 PetriNetUnfolderBase]: 1863/3483 cut-off events. [2023-11-06 23:09:20,042 INFO L125 PetriNetUnfolderBase]: For 107841/107841 co-relation queries the response was YES. [2023-11-06 23:09:20,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30317 conditions, 3483 events. 1863/3483 cut-off events. For 107841/107841 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 22826 event pairs, 261 based on Foata normal form. 48/3531 useless extension candidates. Maximal degree in co-relation 30209. Up to 2057 conditions per place. [2023-11-06 23:09:20,084 INFO L140 encePairwiseOnDemand]: 346/356 looper letters, 270 selfloop transitions, 179 changer transitions 3/452 dead transitions. [2023-11-06 23:09:20,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 452 transitions, 7967 flow [2023-11-06 23:09:20,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 23:09:20,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 23:09:20,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1718 transitions. [2023-11-06 23:09:20,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2681023720349563 [2023-11-06 23:09:20,088 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1718 transitions. [2023-11-06 23:09:20,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1718 transitions. [2023-11-06 23:09:20,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:20,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1718 transitions. [2023-11-06 23:09:20,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 95.44444444444444) internal successors, (1718), 18 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:20,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 356.0) internal successors, (6764), 19 states have internal predecessors, (6764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:20,095 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 356.0) internal successors, (6764), 19 states have internal predecessors, (6764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:20,095 INFO L175 Difference]: Start difference. First operand has 240 places, 378 transitions, 5950 flow. Second operand 18 states and 1718 transitions. [2023-11-06 23:09:20,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 452 transitions, 7967 flow [2023-11-06 23:09:20,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 452 transitions, 7747 flow, removed 1 selfloop flow, removed 9 redundant places. [2023-11-06 23:09:20,386 INFO L231 Difference]: Finished difference. Result has 245 places, 384 transitions, 6241 flow [2023-11-06 23:09:20,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=5730, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6241, PETRI_PLACES=245, PETRI_TRANSITIONS=384} [2023-11-06 23:09:20,387 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 224 predicate places. [2023-11-06 23:09:20,387 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 384 transitions, 6241 flow [2023-11-06 23:09:20,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 91.8) internal successors, (2754), 30 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:20,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:20,388 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:20,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:20,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:20,589 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:09:20,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:20,589 INFO L85 PathProgramCache]: Analyzing trace with hash -20290589, now seen corresponding path program 11 times [2023-11-06 23:09:20,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:20,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224968571] [2023-11-06 23:09:20,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:20,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:09:21,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:21,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224968571] [2023-11-06 23:09:21,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224968571] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:21,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177279208] [2023-11-06 23:09:21,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:09:21,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:21,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:21,002 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:21,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a46d13d-3d3b-40ef-8b1e-2fe0bd9e244b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-06 23:09:21,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:09:21,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:21,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-06 23:09:21,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:21,190 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-11-06 23:09:21,346 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 23:09:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:09:21,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:21,500 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1537 (Array Int Int)) (~B~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1537))) (let ((.cse0 (select .cse1 ~B~0.base))) (or (= (select .cse0 (+ c_~B~0.offset (* c_~i_AB~0 4))) |c_thread1Thread1of1ForFork1_#t~mem1|) (not (let ((.cse2 (* c_~i_BA~0 4))) (= (select (select .cse1 c_~A~0.base) (+ c_~A~0.offset .cse2 4)) (select .cse0 (+ .cse2 4 c_~B~0.offset))))))))) is different from false [2023-11-06 23:09:21,543 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:09:21,543 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 178 [2023-11-06 23:09:21,568 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:09:21,568 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 89 [2023-11-06 23:09:22,281 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:09:22,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177279208] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:22,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:22,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 8] total 19 [2023-11-06 23:09:22,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930992569] [2023-11-06 23:09:22,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:22,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 23:09:22,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:22,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 23:09:22,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=291, Unknown=1, NotChecked=34, Total=380 [2023-11-06 23:09:22,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 356 [2023-11-06 23:09:22,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 384 transitions, 6241 flow. Second operand has 20 states, 20 states have (on average 108.15) internal successors, (2163), 20 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:22,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:22,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 356 [2023-11-06 23:09:22,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand