./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:26:21,545 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:26:21,647 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:26:21,651 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:26:21,652 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:26:21,676 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:26:21,676 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:26:21,677 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:26:21,678 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:26:21,678 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:26:21,679 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:26:21,680 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:26:21,680 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:26:21,681 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:26:21,681 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:26:21,682 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:26:21,682 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:26:21,683 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:26:21,683 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:26:21,684 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:26:21,684 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:26:21,685 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:26:21,686 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:26:21,686 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:26:21,686 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:26:21,687 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:26:21,687 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:26:21,688 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:26:21,688 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:26:21,689 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:26:21,689 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:26:21,690 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:26:21,690 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:26:21,690 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:26:21,691 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:26:21,691 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:26:21,691 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:26:21,692 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:26:21,692 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:26:21,692 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_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e [2023-11-12 02:26:21,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:26:21,943 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:26:21,945 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:26:21,946 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:26:21,947 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:26:21,948 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2023-11-12 02:26:25,108 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:26:25,331 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:26:25,331 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2023-11-12 02:26:25,340 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/data/63fd04a24/25ed51f8978a4c2d80751f359f9721c3/FLAG0fe97d2ba [2023-11-12 02:26:25,359 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/data/63fd04a24/25ed51f8978a4c2d80751f359f9721c3 [2023-11-12 02:26:25,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:26:25,371 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:26:25,375 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:26:25,375 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:26:25,380 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:26:25,384 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:26:25" (1/1) ... [2023-11-12 02:26:25,385 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@84aed2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:25, skipping insertion in model container [2023-11-12 02:26:25,385 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:26:25" (1/1) ... [2023-11-12 02:26:25,413 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:26:25,596 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_804c7236-82ba-400f-b348-e26707f1dcf1/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2874,2887] [2023-11-12 02:26:25,605 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:26:25,617 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:26:25,644 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_804c7236-82ba-400f-b348-e26707f1dcf1/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2874,2887] [2023-11-12 02:26:25,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:26:25,666 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:26:25,666 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:25 WrapperNode [2023-11-12 02:26:25,666 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:26:25,668 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:26:25,668 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:26:25,669 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:26:25,677 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:25" (1/1) ... [2023-11-12 02:26:25,688 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:25" (1/1) ... [2023-11-12 02:26:25,718 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 135 [2023-11-12 02:26:25,719 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:26:25,719 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:26:25,720 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:26:25,720 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:26:25,730 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:25" (1/1) ... [2023-11-12 02:26:25,731 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:25" (1/1) ... [2023-11-12 02:26:25,735 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:25" (1/1) ... [2023-11-12 02:26:25,735 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:25" (1/1) ... [2023-11-12 02:26:25,749 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:25" (1/1) ... [2023-11-12 02:26:25,762 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:25" (1/1) ... [2023-11-12 02:26:25,765 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:25" (1/1) ... [2023-11-12 02:26:25,767 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:25" (1/1) ... [2023-11-12 02:26:25,778 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:26:25,790 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:26:25,791 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:26:25,791 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:26:25,792 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:25" (1/1) ... [2023-11-12 02:26:25,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:26:25,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:25,825 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:26:25,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:26:25,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:26:25,874 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:26:25,874 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:26:25,874 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:26:25,875 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:26:25,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:26:25,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:26:25,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:26:25,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:26:25,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:26:25,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:26:25,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:26:25,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:26:25,880 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:26:26,015 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:26:26,018 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:26:26,371 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:26:26,383 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:26:26,383 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-12 02:26:26,386 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:26:26 BoogieIcfgContainer [2023-11-12 02:26:26,386 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:26:26,389 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:26:26,390 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:26:26,394 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:26:26,394 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:26:25" (1/3) ... [2023-11-12 02:26:26,396 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41fb5198 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:26:26, skipping insertion in model container [2023-11-12 02:26:26,396 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:25" (2/3) ... [2023-11-12 02:26:26,397 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41fb5198 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:26:26, skipping insertion in model container [2023-11-12 02:26:26,397 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:26:26" (3/3) ... [2023-11-12 02:26:26,399 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2023-11-12 02:26:26,408 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:26:26,422 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:26:26,422 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:26:26,423 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:26:26,612 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:26:26,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 234 transitions, 482 flow [2023-11-12 02:26:26,772 INFO L124 PetriNetUnfolderBase]: 21/232 cut-off events. [2023-11-12 02:26:26,772 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:26:26,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241 conditions, 232 events. 21/232 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 243 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 159. Up to 3 conditions per place. [2023-11-12 02:26:26,781 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 234 transitions, 482 flow [2023-11-12 02:26:26,788 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 223 transitions, 458 flow [2023-11-12 02:26:26,792 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:26:26,802 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 223 transitions, 458 flow [2023-11-12 02:26:26,806 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 223 transitions, 458 flow [2023-11-12 02:26:26,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 223 transitions, 458 flow [2023-11-12 02:26:26,861 INFO L124 PetriNetUnfolderBase]: 21/223 cut-off events. [2023-11-12 02:26:26,861 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:26:26,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 223 events. 21/223 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 242 event pairs, 0 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 159. Up to 3 conditions per place. [2023-11-12 02:26:26,874 INFO L119 LiptonReduction]: Number of co-enabled transitions 3008 [2023-11-12 02:26:35,210 INFO L134 LiptonReduction]: Checked pairs total: 3462 [2023-11-12 02:26:35,211 INFO L136 LiptonReduction]: Total number of compositions: 245 [2023-11-12 02:26:35,228 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:26:35,233 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5e25f286, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:26:35,234 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-12 02:26:35,245 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:26:35,245 INFO L124 PetriNetUnfolderBase]: 7/24 cut-off events. [2023-11-12 02:26:35,246 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:26:35,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:35,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:35,247 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:26:35,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:35,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1216028637, now seen corresponding path program 1 times [2023-11-12 02:26:35,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:35,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18832507] [2023-11-12 02:26:35,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:35,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:35,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:36,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:36,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:36,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18832507] [2023-11-12 02:26:36,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18832507] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:36,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:36,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:26:36,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87601085] [2023-11-12 02:26:36,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:36,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:26:36,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:36,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:26:36,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:26:36,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 479 [2023-11-12 02:26:36,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 25 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:36,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:36,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 479 [2023-11-12 02:26:36,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:36,381 INFO L124 PetriNetUnfolderBase]: 112/192 cut-off events. [2023-11-12 02:26:36,381 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-12 02:26:36,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410 conditions, 192 events. 112/192 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 548 event pairs, 51 based on Foata normal form. 1/135 useless extension candidates. Maximal degree in co-relation 338. Up to 151 conditions per place. [2023-11-12 02:26:36,385 INFO L140 encePairwiseOnDemand]: 475/479 looper letters, 35 selfloop transitions, 1 changer transitions 5/41 dead transitions. [2023-11-12 02:26:36,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 41 transitions, 188 flow [2023-11-12 02:26:36,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:26:36,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:26:36,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 859 transitions. [2023-11-12 02:26:36,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44832985386221297 [2023-11-12 02:26:36,412 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 859 transitions. [2023-11-12 02:26:36,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 859 transitions. [2023-11-12 02:26:36,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:36,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 859 transitions. [2023-11-12 02:26:36,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 214.75) internal successors, (859), 4 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:36,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:36,438 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:36,461 INFO L175 Difference]: Start difference. First operand has 25 places, 25 transitions, 62 flow. Second operand 4 states and 859 transitions. [2023-11-12 02:26:36,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 41 transitions, 188 flow [2023-11-12 02:26:36,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 41 transitions, 172 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:26:36,470 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 63 flow [2023-11-12 02:26:36,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=63, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2023-11-12 02:26:36,480 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 1 predicate places. [2023-11-12 02:26:36,480 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 63 flow [2023-11-12 02:26:36,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:36,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:36,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:36,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:26:36,483 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:26:36,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:36,487 INFO L85 PathProgramCache]: Analyzing trace with hash 386120865, now seen corresponding path program 2 times [2023-11-12 02:26:36,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:36,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238650057] [2023-11-12 02:26:36,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:36,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:36,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:36,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238650057] [2023-11-12 02:26:36,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238650057] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:36,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:36,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:26:36,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137976123] [2023-11-12 02:26:36,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:36,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:26:36,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:36,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:26:36,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:26:36,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 479 [2023-11-12 02:26:36,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 63 flow. Second operand has 4 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:36,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:36,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 479 [2023-11-12 02:26:36,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:37,159 INFO L124 PetriNetUnfolderBase]: 119/215 cut-off events. [2023-11-12 02:26:37,160 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2023-11-12 02:26:37,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 215 events. 119/215 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 682 event pairs, 67 based on Foata normal form. 5/172 useless extension candidates. Maximal degree in co-relation 466. Up to 179 conditions per place. [2023-11-12 02:26:37,166 INFO L140 encePairwiseOnDemand]: 475/479 looper letters, 31 selfloop transitions, 1 changer transitions 7/39 dead transitions. [2023-11-12 02:26:37,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 39 transitions, 179 flow [2023-11-12 02:26:37,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:26:37,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:26:37,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 857 transitions. [2023-11-12 02:26:37,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.447286012526096 [2023-11-12 02:26:37,175 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 857 transitions. [2023-11-12 02:26:37,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 857 transitions. [2023-11-12 02:26:37,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:37,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 857 transitions. [2023-11-12 02:26:37,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 214.25) internal successors, (857), 4 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:37,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:37,188 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:37,189 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 63 flow. Second operand 4 states and 857 transitions. [2023-11-12 02:26:37,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 39 transitions, 179 flow [2023-11-12 02:26:37,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 39 transitions, 173 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-12 02:26:37,195 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 69 flow [2023-11-12 02:26:37,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=69, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-11-12 02:26:37,197 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-11-12 02:26:37,197 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 69 flow [2023-11-12 02:26:37,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:37,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:37,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:37,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:26:37,206 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:26:37,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:37,210 INFO L85 PathProgramCache]: Analyzing trace with hash 123395315, now seen corresponding path program 1 times [2023-11-12 02:26:37,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:37,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905572843] [2023-11-12 02:26:37,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:37,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:37,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:37,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:37,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905572843] [2023-11-12 02:26:37,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905572843] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:37,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:37,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:26:37,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001146797] [2023-11-12 02:26:37,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:37,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:26:37,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:37,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:26:37,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:26:37,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 479 [2023-11-12 02:26:37,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:37,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:37,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 479 [2023-11-12 02:26:37,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:37,388 INFO L124 PetriNetUnfolderBase]: 87/154 cut-off events. [2023-11-12 02:26:37,388 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2023-11-12 02:26:37,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 154 events. 87/154 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 418 event pairs, 24 based on Foata normal form. 16/138 useless extension candidates. Maximal degree in co-relation 348. Up to 133 conditions per place. [2023-11-12 02:26:37,392 INFO L140 encePairwiseOnDemand]: 475/479 looper letters, 26 selfloop transitions, 2 changer transitions 4/32 dead transitions. [2023-11-12 02:26:37,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 32 transitions, 153 flow [2023-11-12 02:26:37,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:26:37,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:26:37,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 664 transitions. [2023-11-12 02:26:37,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46207376478775225 [2023-11-12 02:26:37,396 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 664 transitions. [2023-11-12 02:26:37,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 664 transitions. [2023-11-12 02:26:37,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:37,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 664 transitions. [2023-11-12 02:26:37,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:37,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:37,405 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:37,405 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 69 flow. Second operand 3 states and 664 transitions. [2023-11-12 02:26:37,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 32 transitions, 153 flow [2023-11-12 02:26:37,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 32 transitions, 150 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-12 02:26:37,409 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 72 flow [2023-11-12 02:26:37,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-11-12 02:26:37,411 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-11-12 02:26:37,415 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 72 flow [2023-11-12 02:26:37,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:37,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:37,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:37,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:26:37,416 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:26:37,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:37,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1414452377, now seen corresponding path program 1 times [2023-11-12 02:26:37,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:37,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418758786] [2023-11-12 02:26:37,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:37,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:38,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:38,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:38,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418758786] [2023-11-12 02:26:38,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418758786] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:38,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:38,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:26:38,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572402376] [2023-11-12 02:26:38,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:38,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:26:38,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:38,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:26:38,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:26:38,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 479 [2023-11-12 02:26:38,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 72 flow. Second operand has 8 states, 8 states have (on average 189.875) internal successors, (1519), 8 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:38,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:38,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 479 [2023-11-12 02:26:38,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:38,775 INFO L124 PetriNetUnfolderBase]: 176/319 cut-off events. [2023-11-12 02:26:38,775 INFO L125 PetriNetUnfolderBase]: For 126/126 co-relation queries the response was YES. [2023-11-12 02:26:38,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 319 events. 176/319 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1110 event pairs, 34 based on Foata normal form. 1/252 useless extension candidates. Maximal degree in co-relation 263. Up to 76 conditions per place. [2023-11-12 02:26:38,779 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 73 selfloop transitions, 15 changer transitions 11/99 dead transitions. [2023-11-12 02:26:38,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 99 transitions, 469 flow [2023-11-12 02:26:38,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:26:38,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-12 02:26:38,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2166 transitions. [2023-11-12 02:26:38,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41108369709622317 [2023-11-12 02:26:38,789 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2166 transitions. [2023-11-12 02:26:38,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2166 transitions. [2023-11-12 02:26:38,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:38,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2166 transitions. [2023-11-12 02:26:38,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 196.9090909090909) internal successors, (2166), 11 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:38,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:38,817 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:38,817 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 72 flow. Second operand 11 states and 2166 transitions. [2023-11-12 02:26:38,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 99 transitions, 469 flow [2023-11-12 02:26:38,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 99 transitions, 443 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-11-12 02:26:38,834 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 179 flow [2023-11-12 02:26:38,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=179, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2023-11-12 02:26:38,836 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 17 predicate places. [2023-11-12 02:26:38,836 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 179 flow [2023-11-12 02:26:38,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 189.875) internal successors, (1519), 8 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:38,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:38,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:38,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:26:38,838 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:26:38,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:38,839 INFO L85 PathProgramCache]: Analyzing trace with hash 954213597, now seen corresponding path program 2 times [2023-11-12 02:26:38,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:38,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197802088] [2023-11-12 02:26:38,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:38,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:38,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:39,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:39,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:39,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197802088] [2023-11-12 02:26:39,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197802088] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:39,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:39,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:26:39,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990913218] [2023-11-12 02:26:39,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:39,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:26:39,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:39,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:26:39,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:26:39,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 479 [2023-11-12 02:26:39,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 179 flow. Second operand has 8 states, 8 states have (on average 189.875) internal successors, (1519), 8 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:39,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:39,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 479 [2023-11-12 02:26:39,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:40,166 INFO L124 PetriNetUnfolderBase]: 189/341 cut-off events. [2023-11-12 02:26:40,167 INFO L125 PetriNetUnfolderBase]: For 312/312 co-relation queries the response was YES. [2023-11-12 02:26:40,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1043 conditions, 341 events. 189/341 cut-off events. For 312/312 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1199 event pairs, 26 based on Foata normal form. 13/332 useless extension candidates. Maximal degree in co-relation 1022. Up to 122 conditions per place. [2023-11-12 02:26:40,171 INFO L140 encePairwiseOnDemand]: 467/479 looper letters, 69 selfloop transitions, 19 changer transitions 10/98 dead transitions. [2023-11-12 02:26:40,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 98 transitions, 570 flow [2023-11-12 02:26:40,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:26:40,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-12 02:26:40,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2163 transitions. [2023-11-12 02:26:40,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41051432909470487 [2023-11-12 02:26:40,180 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2163 transitions. [2023-11-12 02:26:40,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2163 transitions. [2023-11-12 02:26:40,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:40,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2163 transitions. [2023-11-12 02:26:40,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 196.63636363636363) internal successors, (2163), 11 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) [2023-11-12 02:26:40,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:40,202 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:40,202 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 179 flow. Second operand 11 states and 2163 transitions. [2023-11-12 02:26:40,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 98 transitions, 570 flow [2023-11-12 02:26:40,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 98 transitions, 546 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-11-12 02:26:40,208 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 276 flow [2023-11-12 02:26:40,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=276, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-11-12 02:26:40,210 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 28 predicate places. [2023-11-12 02:26:40,210 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 276 flow [2023-11-12 02:26:40,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 189.875) internal successors, (1519), 8 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:40,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:40,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:40,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:26:40,212 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:26:40,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:40,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1586080707, now seen corresponding path program 3 times [2023-11-12 02:26:40,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:40,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473210564] [2023-11-12 02:26:40,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:40,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:40,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:40,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473210564] [2023-11-12 02:26:40,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473210564] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:40,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:40,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:26:40,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152732652] [2023-11-12 02:26:40,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:40,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:26:40,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:40,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:26:40,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:26:41,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 479 [2023-11-12 02:26:41,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 276 flow. Second operand has 8 states, 8 states have (on average 187.875) internal successors, (1503), 8 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:41,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:41,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 479 [2023-11-12 02:26:41,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:41,360 INFO L124 PetriNetUnfolderBase]: 192/348 cut-off events. [2023-11-12 02:26:41,360 INFO L125 PetriNetUnfolderBase]: For 503/503 co-relation queries the response was YES. [2023-11-12 02:26:41,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1231 conditions, 348 events. 192/348 cut-off events. For 503/503 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1253 event pairs, 26 based on Foata normal form. 1/325 useless extension candidates. Maximal degree in co-relation 1087. Up to 116 conditions per place. [2023-11-12 02:26:41,364 INFO L140 encePairwiseOnDemand]: 470/479 looper letters, 76 selfloop transitions, 18 changer transitions 7/101 dead transitions. [2023-11-12 02:26:41,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 101 transitions, 649 flow [2023-11-12 02:26:41,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:26:41,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-12 02:26:41,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2140 transitions. [2023-11-12 02:26:41,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4061491744163978 [2023-11-12 02:26:41,374 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2140 transitions. [2023-11-12 02:26:41,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2140 transitions. [2023-11-12 02:26:41,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:41,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2140 transitions. [2023-11-12 02:26:41,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 194.54545454545453) internal successors, (2140), 11 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:41,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:41,396 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:41,396 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 276 flow. Second operand 11 states and 2140 transitions. [2023-11-12 02:26:41,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 101 transitions, 649 flow [2023-11-12 02:26:41,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 101 transitions, 580 flow, removed 18 selfloop flow, removed 8 redundant places. [2023-11-12 02:26:41,403 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 266 flow [2023-11-12 02:26:41,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=266, PETRI_PLACES=56, PETRI_TRANSITIONS=47} [2023-11-12 02:26:41,405 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 31 predicate places. [2023-11-12 02:26:41,405 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 266 flow [2023-11-12 02:26:41,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 187.875) internal successors, (1503), 8 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:41,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:41,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:41,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:26:41,407 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:26:41,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:41,408 INFO L85 PathProgramCache]: Analyzing trace with hash -780051967, now seen corresponding path program 4 times [2023-11-12 02:26:41,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:41,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468348880] [2023-11-12 02:26:41,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:41,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:41,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:41,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468348880] [2023-11-12 02:26:41,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468348880] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:41,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:41,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:26:41,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45915046] [2023-11-12 02:26:41,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:41,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:26:41,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:41,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:26:41,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:26:42,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 479 [2023-11-12 02:26:42,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 266 flow. Second operand has 8 states, 8 states have (on average 189.875) internal successors, (1519), 8 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:42,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:42,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 479 [2023-11-12 02:26:42,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:42,590 INFO L124 PetriNetUnfolderBase]: 172/328 cut-off events. [2023-11-12 02:26:42,590 INFO L125 PetriNetUnfolderBase]: For 357/357 co-relation queries the response was YES. [2023-11-12 02:26:42,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 328 events. 172/328 cut-off events. For 357/357 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1218 event pairs, 38 based on Foata normal form. 19/324 useless extension candidates. Maximal degree in co-relation 1069. Up to 83 conditions per place. [2023-11-12 02:26:42,594 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 75 selfloop transitions, 17 changer transitions 9/101 dead transitions. [2023-11-12 02:26:42,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 101 transitions, 629 flow [2023-11-12 02:26:42,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:26:42,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-12 02:26:42,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1979 transitions. [2023-11-12 02:26:42,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41315240083507304 [2023-11-12 02:26:42,603 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1979 transitions. [2023-11-12 02:26:42,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1979 transitions. [2023-11-12 02:26:42,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:42,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1979 transitions. [2023-11-12 02:26:42,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 197.9) internal successors, (1979), 10 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:42,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:42,623 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:42,624 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 266 flow. Second operand 10 states and 1979 transitions. [2023-11-12 02:26:42,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 101 transitions, 629 flow [2023-11-12 02:26:42,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 101 transitions, 587 flow, removed 2 selfloop flow, removed 9 redundant places. [2023-11-12 02:26:42,629 INFO L231 Difference]: Finished difference. Result has 61 places, 48 transitions, 310 flow [2023-11-12 02:26:42,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=310, PETRI_PLACES=61, PETRI_TRANSITIONS=48} [2023-11-12 02:26:42,630 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 36 predicate places. [2023-11-12 02:26:42,631 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 48 transitions, 310 flow [2023-11-12 02:26:42,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 189.875) internal successors, (1519), 8 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:42,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:42,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:42,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:26:42,633 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:26:42,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:42,633 INFO L85 PathProgramCache]: Analyzing trace with hash -153075609, now seen corresponding path program 5 times [2023-11-12 02:26:42,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:42,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965055966] [2023-11-12 02:26:42,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:42,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:43,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:43,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965055966] [2023-11-12 02:26:43,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965055966] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:43,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:43,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:26:43,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935332009] [2023-11-12 02:26:43,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:43,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:26:43,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:43,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:26:43,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:26:43,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 479 [2023-11-12 02:26:43,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 48 transitions, 310 flow. Second operand has 8 states, 8 states have (on average 189.875) internal successors, (1519), 8 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:43,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:43,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 479 [2023-11-12 02:26:43,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:43,796 INFO L124 PetriNetUnfolderBase]: 172/326 cut-off events. [2023-11-12 02:26:43,796 INFO L125 PetriNetUnfolderBase]: For 664/664 co-relation queries the response was YES. [2023-11-12 02:26:43,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1193 conditions, 326 events. 172/326 cut-off events. For 664/664 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1196 event pairs, 37 based on Foata normal form. 1/302 useless extension candidates. Maximal degree in co-relation 1075. Up to 76 conditions per place. [2023-11-12 02:26:43,801 INFO L140 encePairwiseOnDemand]: 470/479 looper letters, 78 selfloop transitions, 18 changer transitions 5/101 dead transitions. [2023-11-12 02:26:43,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 101 transitions, 668 flow [2023-11-12 02:26:43,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:26:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-12 02:26:43,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2161 transitions. [2023-11-12 02:26:43,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.410134750427026 [2023-11-12 02:26:43,810 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2161 transitions. [2023-11-12 02:26:43,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2161 transitions. [2023-11-12 02:26:43,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:43,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2161 transitions. [2023-11-12 02:26:43,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 196.45454545454547) internal successors, (2161), 11 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:43,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:43,834 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:43,834 INFO L175 Difference]: Start difference. First operand has 61 places, 48 transitions, 310 flow. Second operand 11 states and 2161 transitions. [2023-11-12 02:26:43,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 101 transitions, 668 flow [2023-11-12 02:26:43,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 101 transitions, 626 flow, removed 11 selfloop flow, removed 7 redundant places. [2023-11-12 02:26:43,842 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 328 flow [2023-11-12 02:26:43,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=328, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2023-11-12 02:26:43,843 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 39 predicate places. [2023-11-12 02:26:43,843 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 328 flow [2023-11-12 02:26:43,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 189.875) internal successors, (1519), 8 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:43,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:43,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:43,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:26:43,846 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:26:43,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:43,847 INFO L85 PathProgramCache]: Analyzing trace with hash -142966627, now seen corresponding path program 6 times [2023-11-12 02:26:43,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:43,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905019014] [2023-11-12 02:26:43,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:43,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:44,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:44,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905019014] [2023-11-12 02:26:44,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905019014] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:44,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:44,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:26:44,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634439667] [2023-11-12 02:26:44,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:44,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:26:44,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:44,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:26:44,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:26:44,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 479 [2023-11-12 02:26:44,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 328 flow. Second operand has 8 states, 8 states have (on average 187.875) internal successors, (1503), 8 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:44,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:44,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 479 [2023-11-12 02:26:44,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:44,985 INFO L124 PetriNetUnfolderBase]: 171/319 cut-off events. [2023-11-12 02:26:44,986 INFO L125 PetriNetUnfolderBase]: For 563/563 co-relation queries the response was YES. [2023-11-12 02:26:44,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1160 conditions, 319 events. 171/319 cut-off events. For 563/563 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1147 event pairs, 37 based on Foata normal form. 1/295 useless extension candidates. Maximal degree in co-relation 1135. Up to 119 conditions per place. [2023-11-12 02:26:44,991 INFO L140 encePairwiseOnDemand]: 470/479 looper letters, 73 selfloop transitions, 18 changer transitions 5/96 dead transitions. [2023-11-12 02:26:44,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 96 transitions, 644 flow [2023-11-12 02:26:44,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:26:44,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-12 02:26:44,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2134 transitions. [2023-11-12 02:26:45,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40501043841336115 [2023-11-12 02:26:45,000 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2134 transitions. [2023-11-12 02:26:45,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2134 transitions. [2023-11-12 02:26:45,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:45,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2134 transitions. [2023-11-12 02:26:45,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 194.0) internal successors, (2134), 11 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:45,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:45,035 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:45,035 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 328 flow. Second operand 11 states and 2134 transitions. [2023-11-12 02:26:45,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 96 transitions, 644 flow [2023-11-12 02:26:45,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 96 transitions, 604 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-11-12 02:26:45,042 INFO L231 Difference]: Finished difference. Result has 66 places, 48 transitions, 318 flow [2023-11-12 02:26:45,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=318, PETRI_PLACES=66, PETRI_TRANSITIONS=48} [2023-11-12 02:26:45,044 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 41 predicate places. [2023-11-12 02:26:45,044 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 48 transitions, 318 flow [2023-11-12 02:26:45,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 187.875) internal successors, (1503), 8 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:45,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:45,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:45,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 02:26:45,045 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:26:45,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:45,046 INFO L85 PathProgramCache]: Analyzing trace with hash -848543040, now seen corresponding path program 1 times [2023-11-12 02:26:45,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:45,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183910364] [2023-11-12 02:26:45,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:45,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:45,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:45,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:45,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183910364] [2023-11-12 02:26:45,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183910364] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:26:45,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992916679] [2023-11-12 02:26:45,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:45,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:45,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:45,499 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:45,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:26:45,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:45,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-12 02:26:45,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:46,199 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:26:46,200 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 132 treesize of output 97 [2023-11-12 02:26:46,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:46,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:26:46,522 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:26:46,522 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 168 treesize of output 132 [2023-11-12 02:26:47,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:47,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992916679] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:26:47,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:26:47,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 24 [2023-11-12 02:26:47,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526802096] [2023-11-12 02:26:47,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:47,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:26:47,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:47,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:26:47,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2023-11-12 02:26:48,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 479 [2023-11-12 02:26:48,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 48 transitions, 318 flow. Second operand has 10 states, 10 states have (on average 179.6) internal successors, (1796), 10 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:48,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:48,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 479 [2023-11-12 02:26:48,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:49,380 INFO L124 PetriNetUnfolderBase]: 365/684 cut-off events. [2023-11-12 02:26:49,381 INFO L125 PetriNetUnfolderBase]: For 1244/1244 co-relation queries the response was YES. [2023-11-12 02:26:49,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2444 conditions, 684 events. 365/684 cut-off events. For 1244/1244 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3135 event pairs, 56 based on Foata normal form. 17/651 useless extension candidates. Maximal degree in co-relation 2410. Up to 158 conditions per place. [2023-11-12 02:26:49,389 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 93 selfloop transitions, 42 changer transitions 8/143 dead transitions. [2023-11-12 02:26:49,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 143 transitions, 1088 flow [2023-11-12 02:26:49,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:26:49,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-12 02:26:49,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2244 transitions. [2023-11-12 02:26:49,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903966597077244 [2023-11-12 02:26:49,399 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2244 transitions. [2023-11-12 02:26:49,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2244 transitions. [2023-11-12 02:26:49,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:49,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2244 transitions. [2023-11-12 02:26:49,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 187.0) internal successors, (2244), 12 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:49,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 479.0) internal successors, (6227), 13 states have internal predecessors, (6227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:49,420 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 479.0) internal successors, (6227), 13 states have internal predecessors, (6227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:49,420 INFO L175 Difference]: Start difference. First operand has 66 places, 48 transitions, 318 flow. Second operand 12 states and 2244 transitions. [2023-11-12 02:26:49,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 143 transitions, 1088 flow [2023-11-12 02:26:49,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 143 transitions, 984 flow, removed 7 selfloop flow, removed 12 redundant places. [2023-11-12 02:26:49,430 INFO L231 Difference]: Finished difference. Result has 71 places, 76 transitions, 650 flow [2023-11-12 02:26:49,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=650, PETRI_PLACES=71, PETRI_TRANSITIONS=76} [2023-11-12 02:26:49,431 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 46 predicate places. [2023-11-12 02:26:49,432 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 76 transitions, 650 flow [2023-11-12 02:26:49,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 179.6) internal successors, (1796), 10 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:49,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:49,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:49,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:26:49,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:26:49,638 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:26:49,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:49,639 INFO L85 PathProgramCache]: Analyzing trace with hash -712860998, now seen corresponding path program 2 times [2023-11-12 02:26:49,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:49,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516309270] [2023-11-12 02:26:49,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:49,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:49,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:50,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:50,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516309270] [2023-11-12 02:26:50,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516309270] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:26:50,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041144470] [2023-11-12 02:26:50,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:26:50,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:50,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:50,057 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:50,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:26:50,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:26:50,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:26:50,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-12 02:26:50,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:50,458 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:26:50,458 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 134 treesize of output 99 [2023-11-12 02:26:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:26:50,506 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:26:50,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041144470] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:50,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:26:50,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-11-12 02:26:50,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152025936] [2023-11-12 02:26:50,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:50,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:26:50,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:50,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:26:50,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:26:50,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 479 [2023-11-12 02:26:50,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 76 transitions, 650 flow. Second operand has 9 states, 9 states have (on average 187.77777777777777) internal successors, (1690), 9 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:50,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:50,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 479 [2023-11-12 02:26:50,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:51,145 INFO L124 PetriNetUnfolderBase]: 360/675 cut-off events. [2023-11-12 02:26:51,146 INFO L125 PetriNetUnfolderBase]: For 2257/2257 co-relation queries the response was YES. [2023-11-12 02:26:51,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2691 conditions, 675 events. 360/675 cut-off events. For 2257/2257 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3064 event pairs, 66 based on Foata normal form. 1/628 useless extension candidates. Maximal degree in co-relation 2328. Up to 330 conditions per place. [2023-11-12 02:26:51,154 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 71 selfloop transitions, 33 changer transitions 11/115 dead transitions. [2023-11-12 02:26:51,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 115 transitions, 1055 flow [2023-11-12 02:26:51,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:26:51,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:26:51,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1749 transitions. [2023-11-12 02:26:51,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057063326374391 [2023-11-12 02:26:51,162 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1749 transitions. [2023-11-12 02:26:51,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1749 transitions. [2023-11-12 02:26:51,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:51,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1749 transitions. [2023-11-12 02:26:51,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 194.33333333333334) internal successors, (1749), 9 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:51,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:51,178 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:51,178 INFO L175 Difference]: Start difference. First operand has 71 places, 76 transitions, 650 flow. Second operand 9 states and 1749 transitions. [2023-11-12 02:26:51,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 115 transitions, 1055 flow [2023-11-12 02:26:51,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 115 transitions, 1018 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-11-12 02:26:51,196 INFO L231 Difference]: Finished difference. Result has 78 places, 75 transitions, 689 flow [2023-11-12 02:26:51,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=689, PETRI_PLACES=78, PETRI_TRANSITIONS=75} [2023-11-12 02:26:51,197 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 53 predicate places. [2023-11-12 02:26:51,198 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 75 transitions, 689 flow [2023-11-12 02:26:51,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 187.77777777777777) internal successors, (1690), 9 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:51,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:51,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:51,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:26:51,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:51,405 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:26:51,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:51,406 INFO L85 PathProgramCache]: Analyzing trace with hash -2007295210, now seen corresponding path program 3 times [2023-11-12 02:26:51,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:51,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929261348] [2023-11-12 02:26:51,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:51,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:51,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:51,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:51,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:51,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929261348] [2023-11-12 02:26:51,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929261348] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:26:51,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29778401] [2023-11-12 02:26:51,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:26:51,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:51,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:51,807 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:51,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:26:51,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-12 02:26:51,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:26:51,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-12 02:26:51,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:52,197 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:26:52,198 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 130 treesize of output 95 [2023-11-12 02:26:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:26:52,299 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:26:52,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29778401] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:52,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:26:52,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-11-12 02:26:52,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615133761] [2023-11-12 02:26:52,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:52,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:26:52,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:52,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:26:52,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:26:52,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 479 [2023-11-12 02:26:52,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 75 transitions, 689 flow. Second operand has 9 states, 9 states have (on average 187.77777777777777) internal successors, (1690), 9 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:52,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:52,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 479 [2023-11-12 02:26:52,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:52,963 INFO L124 PetriNetUnfolderBase]: 361/680 cut-off events. [2023-11-12 02:26:52,963 INFO L125 PetriNetUnfolderBase]: For 2319/2319 co-relation queries the response was YES. [2023-11-12 02:26:52,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2748 conditions, 680 events. 361/680 cut-off events. For 2319/2319 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3120 event pairs, 56 based on Foata normal form. 1/631 useless extension candidates. Maximal degree in co-relation 2708. Up to 322 conditions per place. [2023-11-12 02:26:52,973 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 75 selfloop transitions, 36 changer transitions 5/116 dead transitions. [2023-11-12 02:26:52,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 116 transitions, 1079 flow [2023-11-12 02:26:52,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:26:52,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:26:52,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1751 transitions. [2023-11-12 02:26:52,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4061702621201577 [2023-11-12 02:26:52,985 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1751 transitions. [2023-11-12 02:26:52,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1751 transitions. [2023-11-12 02:26:52,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:52,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1751 transitions. [2023-11-12 02:26:52,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 194.55555555555554) internal successors, (1751), 9 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:53,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:53,001 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:53,001 INFO L175 Difference]: Start difference. First operand has 78 places, 75 transitions, 689 flow. Second operand 9 states and 1751 transitions. [2023-11-12 02:26:53,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 116 transitions, 1079 flow [2023-11-12 02:26:53,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 116 transitions, 997 flow, removed 9 selfloop flow, removed 7 redundant places. [2023-11-12 02:26:53,019 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 703 flow [2023-11-12 02:26:53,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=703, PETRI_PLACES=78, PETRI_TRANSITIONS=76} [2023-11-12 02:26:53,021 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 53 predicate places. [2023-11-12 02:26:53,021 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 703 flow [2023-11-12 02:26:53,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 187.77777777777777) internal successors, (1690), 9 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:53,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:53,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:53,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:26:53,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 02:26:53,230 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:26:53,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:53,230 INFO L85 PathProgramCache]: Analyzing trace with hash -73242358, now seen corresponding path program 4 times [2023-11-12 02:26:53,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:53,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831389472] [2023-11-12 02:26:53,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:53,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:53,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:53,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:53,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831389472] [2023-11-12 02:26:53,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831389472] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:26:53,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317421581] [2023-11-12 02:26:53,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:26:53,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:53,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:53,637 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:53,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:26:53,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:26:53,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:26:53,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 02:26:53,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:54,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:54,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:26:54,337 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:26:54,338 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 168 treesize of output 132 [2023-11-12 02:26:55,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:55,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317421581] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:26:55,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:26:55,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 24 [2023-11-12 02:26:55,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800940983] [2023-11-12 02:26:55,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:55,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:26:55,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:55,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:26:55,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2023-11-12 02:26:56,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 479 [2023-11-12 02:26:56,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 76 transitions, 703 flow. Second operand has 10 states, 10 states have (on average 179.6) internal successors, (1796), 10 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:56,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:56,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 479 [2023-11-12 02:26:56,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:56,762 INFO L124 PetriNetUnfolderBase]: 341/660 cut-off events. [2023-11-12 02:26:56,763 INFO L125 PetriNetUnfolderBase]: For 2198/2198 co-relation queries the response was YES. [2023-11-12 02:26:56,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2614 conditions, 660 events. 341/660 cut-off events. For 2198/2198 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3089 event pairs, 77 based on Foata normal form. 19/629 useless extension candidates. Maximal degree in co-relation 2574. Up to 164 conditions per place. [2023-11-12 02:26:56,771 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 86 selfloop transitions, 38 changer transitions 9/133 dead transitions. [2023-11-12 02:26:56,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 133 transitions, 1184 flow [2023-11-12 02:26:56,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:26:56,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-12 02:26:56,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2055 transitions. [2023-11-12 02:26:56,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39001708104004557 [2023-11-12 02:26:56,777 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2055 transitions. [2023-11-12 02:26:56,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2055 transitions. [2023-11-12 02:26:56,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:56,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2055 transitions. [2023-11-12 02:26:56,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 186.8181818181818) internal successors, (2055), 11 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:56,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:56,794 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:56,794 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 703 flow. Second operand 11 states and 2055 transitions. [2023-11-12 02:26:56,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 133 transitions, 1184 flow [2023-11-12 02:26:56,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 133 transitions, 1108 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-11-12 02:26:56,809 INFO L231 Difference]: Finished difference. Result has 86 places, 81 transitions, 820 flow [2023-11-12 02:26:56,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=820, PETRI_PLACES=86, PETRI_TRANSITIONS=81} [2023-11-12 02:26:56,810 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 61 predicate places. [2023-11-12 02:26:56,810 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 81 transitions, 820 flow [2023-11-12 02:26:56,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 179.6) internal successors, (1796), 10 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:56,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:56,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:56,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:26:57,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-12 02:26:57,018 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:26:57,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:57,018 INFO L85 PathProgramCache]: Analyzing trace with hash 548515770, now seen corresponding path program 5 times [2023-11-12 02:26:57,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:57,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929806016] [2023-11-12 02:26:57,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:57,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:57,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:57,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:57,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929806016] [2023-11-12 02:26:57,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929806016] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:26:57,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069664975] [2023-11-12 02:26:57,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:26:57,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:57,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:57,391 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:57,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:26:57,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:26:57,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:26:57,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-12 02:26:57,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:57,789 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:26:57,789 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 130 treesize of output 95 [2023-11-12 02:26:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:57,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:26:58,219 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:26:58,220 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 168 treesize of output 132 [2023-11-12 02:26:58,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:58,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069664975] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:26:58,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:26:58,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 24 [2023-11-12 02:26:58,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890251802] [2023-11-12 02:26:58,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:58,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:26:58,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:58,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:26:58,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2023-11-12 02:26:59,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 479 [2023-11-12 02:26:59,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 81 transitions, 820 flow. Second operand has 10 states, 10 states have (on average 180.6) internal successors, (1806), 10 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:59,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:59,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 479 [2023-11-12 02:26:59,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:59,994 INFO L124 PetriNetUnfolderBase]: 341/658 cut-off events. [2023-11-12 02:26:59,995 INFO L125 PetriNetUnfolderBase]: For 2843/2843 co-relation queries the response was YES. [2023-11-12 02:26:59,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2786 conditions, 658 events. 341/658 cut-off events. For 2843/2843 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3061 event pairs, 76 based on Foata normal form. 1/607 useless extension candidates. Maximal degree in co-relation 2693. Up to 158 conditions per place. [2023-11-12 02:27:00,004 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 88 selfloop transitions, 40 changer transitions 5/133 dead transitions. [2023-11-12 02:27:00,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 133 transitions, 1256 flow [2023-11-12 02:27:00,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:27:00,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-12 02:27:00,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2239 transitions. [2023-11-12 02:27:00,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.389526791927627 [2023-11-12 02:27:00,011 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2239 transitions. [2023-11-12 02:27:00,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2239 transitions. [2023-11-12 02:27:00,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:00,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2239 transitions. [2023-11-12 02:27:00,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 186.58333333333334) internal successors, (2239), 12 states have internal predecessors, (2239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:00,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 479.0) internal successors, (6227), 13 states have internal predecessors, (6227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:00,034 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 479.0) internal successors, (6227), 13 states have internal predecessors, (6227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:00,034 INFO L175 Difference]: Start difference. First operand has 86 places, 81 transitions, 820 flow. Second operand 12 states and 2239 transitions. [2023-11-12 02:27:00,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 133 transitions, 1256 flow [2023-11-12 02:27:00,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 133 transitions, 1199 flow, removed 15 selfloop flow, removed 6 redundant places. [2023-11-12 02:27:00,055 INFO L231 Difference]: Finished difference. Result has 91 places, 82 transitions, 871 flow [2023-11-12 02:27:00,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=871, PETRI_PLACES=91, PETRI_TRANSITIONS=82} [2023-11-12 02:27:00,057 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 66 predicate places. [2023-11-12 02:27:00,057 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 82 transitions, 871 flow [2023-11-12 02:27:00,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 180.6) internal successors, (1806), 10 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:00,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:00,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:00,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-12 02:27:00,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 02:27:00,264 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:27:00,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:00,265 INFO L85 PathProgramCache]: Analyzing trace with hash 558624752, now seen corresponding path program 6 times [2023-11-12 02:27:00,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:00,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763176743] [2023-11-12 02:27:00,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:00,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:00,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:00,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:00,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:00,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763176743] [2023-11-12 02:27:00,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763176743] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:27:00,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611781815] [2023-11-12 02:27:00,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:27:00,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:00,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:00,642 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:00,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:27:00,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-12 02:27:00,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:27:00,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-12 02:27:00,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:01,002 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:27:01,003 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 130 treesize of output 95 [2023-11-12 02:27:01,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:27:01,075 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:01,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611781815] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:01,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:27:01,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-11-12 02:27:01,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353353204] [2023-11-12 02:27:01,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:01,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:27:01,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:01,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:27:01,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:27:01,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 479 [2023-11-12 02:27:01,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 82 transitions, 871 flow. Second operand has 9 states, 9 states have (on average 187.77777777777777) internal successors, (1690), 9 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:01,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:01,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 479 [2023-11-12 02:27:01,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:01,760 INFO L124 PetriNetUnfolderBase]: 340/651 cut-off events. [2023-11-12 02:27:01,760 INFO L125 PetriNetUnfolderBase]: For 2764/2764 co-relation queries the response was YES. [2023-11-12 02:27:01,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2836 conditions, 651 events. 340/651 cut-off events. For 2764/2764 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3000 event pairs, 76 based on Foata normal form. 1/600 useless extension candidates. Maximal degree in co-relation 2795. Up to 303 conditions per place. [2023-11-12 02:27:01,769 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 79 selfloop transitions, 36 changer transitions 5/120 dead transitions. [2023-11-12 02:27:01,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 120 transitions, 1230 flow [2023-11-12 02:27:01,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:27:01,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:27:01,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1750 transitions. [2023-11-12 02:27:01,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40593829737879844 [2023-11-12 02:27:01,774 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1750 transitions. [2023-11-12 02:27:01,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1750 transitions. [2023-11-12 02:27:01,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:01,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1750 transitions. [2023-11-12 02:27:01,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 194.44444444444446) internal successors, (1750), 9 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:01,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:01,785 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:01,786 INFO L175 Difference]: Start difference. First operand has 91 places, 82 transitions, 871 flow. Second operand 9 states and 1750 transitions. [2023-11-12 02:27:01,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 120 transitions, 1230 flow [2023-11-12 02:27:01,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 120 transitions, 1157 flow, removed 5 selfloop flow, removed 8 redundant places. [2023-11-12 02:27:01,807 INFO L231 Difference]: Finished difference. Result has 92 places, 82 transitions, 878 flow [2023-11-12 02:27:01,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=798, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=878, PETRI_PLACES=92, PETRI_TRANSITIONS=82} [2023-11-12 02:27:01,808 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 67 predicate places. [2023-11-12 02:27:01,808 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 82 transitions, 878 flow [2023-11-12 02:27:01,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 187.77777777777777) internal successors, (1690), 9 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:01,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:01,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:01,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-12 02:27:02,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:02,015 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:27:02,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:02,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1715580094, now seen corresponding path program 1 times [2023-11-12 02:27:02,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:02,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466063475] [2023-11-12 02:27:02,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:02,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:02,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:02,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:02,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:02,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466063475] [2023-11-12 02:27:02,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466063475] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:27:02,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582413492] [2023-11-12 02:27:02,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:02,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:02,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:02,193 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:02,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:27:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:02,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:27:02,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:02,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:02,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:27:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:02,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582413492] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:27:02,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:27:02,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2023-11-12 02:27:02,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124864380] [2023-11-12 02:27:02,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:02,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:27:02,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:02,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:27:02,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:27:02,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 479 [2023-11-12 02:27:02,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 82 transitions, 878 flow. Second operand has 7 states, 7 states have (on average 195.42857142857142) internal successors, (1368), 7 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:02,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:02,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 479 [2023-11-12 02:27:02,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:03,102 INFO L124 PetriNetUnfolderBase]: 350/664 cut-off events. [2023-11-12 02:27:03,102 INFO L125 PetriNetUnfolderBase]: For 3490/3490 co-relation queries the response was YES. [2023-11-12 02:27:03,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2928 conditions, 664 events. 350/664 cut-off events. For 3490/3490 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3178 event pairs, 69 based on Foata normal form. 8/620 useless extension candidates. Maximal degree in co-relation 2886. Up to 168 conditions per place. [2023-11-12 02:27:03,112 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 96 selfloop transitions, 34 changer transitions 0/130 dead transitions. [2023-11-12 02:27:03,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 130 transitions, 1412 flow [2023-11-12 02:27:03,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:27:03,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:27:03,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1816 transitions. [2023-11-12 02:27:03,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42124797030851313 [2023-11-12 02:27:03,117 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1816 transitions. [2023-11-12 02:27:03,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1816 transitions. [2023-11-12 02:27:03,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:03,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1816 transitions. [2023-11-12 02:27:03,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 201.77777777777777) internal successors, (1816), 9 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:03,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:03,129 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:03,129 INFO L175 Difference]: Start difference. First operand has 92 places, 82 transitions, 878 flow. Second operand 9 states and 1816 transitions. [2023-11-12 02:27:03,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 130 transitions, 1412 flow [2023-11-12 02:27:03,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 130 transitions, 1302 flow, removed 5 selfloop flow, removed 8 redundant places. [2023-11-12 02:27:03,144 INFO L231 Difference]: Finished difference. Result has 92 places, 87 transitions, 882 flow [2023-11-12 02:27:03,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=882, PETRI_PLACES=92, PETRI_TRANSITIONS=87} [2023-11-12 02:27:03,145 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 67 predicate places. [2023-11-12 02:27:03,145 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 87 transitions, 882 flow [2023-11-12 02:27:03,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.42857142857142) internal successors, (1368), 7 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:03,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:03,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:03,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:03,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-12 02:27:03,353 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:27:03,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:03,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1202464333, now seen corresponding path program 1 times [2023-11-12 02:27:03,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:03,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733686374] [2023-11-12 02:27:03,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:03,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:03,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:03,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:03,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733686374] [2023-11-12 02:27:03,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733686374] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:03,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:03,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:27:03,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906383547] [2023-11-12 02:27:03,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:03,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:27:03,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:03,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:27:03,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:27:03,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 479 [2023-11-12 02:27:03,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 87 transitions, 882 flow. Second operand has 5 states, 5 states have (on average 203.6) internal successors, (1018), 5 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) [2023-11-12 02:27:03,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:03,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 479 [2023-11-12 02:27:03,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:03,723 INFO L124 PetriNetUnfolderBase]: 200/398 cut-off events. [2023-11-12 02:27:03,724 INFO L125 PetriNetUnfolderBase]: For 1678/1678 co-relation queries the response was YES. [2023-11-12 02:27:03,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1851 conditions, 398 events. 200/398 cut-off events. For 1678/1678 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1611 event pairs, 113 based on Foata normal form. 28/424 useless extension candidates. Maximal degree in co-relation 1729. Up to 329 conditions per place. [2023-11-12 02:27:03,729 INFO L140 encePairwiseOnDemand]: 474/479 looper letters, 48 selfloop transitions, 2 changer transitions 28/78 dead transitions. [2023-11-12 02:27:03,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 78 transitions, 846 flow [2023-11-12 02:27:03,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:27:03,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:27:03,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1040 transitions. [2023-11-12 02:27:03,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4342379958246347 [2023-11-12 02:27:03,732 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1040 transitions. [2023-11-12 02:27:03,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1040 transitions. [2023-11-12 02:27:03,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:03,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1040 transitions. [2023-11-12 02:27:03,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:03,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:03,740 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:03,740 INFO L175 Difference]: Start difference. First operand has 92 places, 87 transitions, 882 flow. Second operand 5 states and 1040 transitions. [2023-11-12 02:27:03,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 78 transitions, 846 flow [2023-11-12 02:27:03,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 78 transitions, 787 flow, removed 11 selfloop flow, removed 8 redundant places. [2023-11-12 02:27:03,751 INFO L231 Difference]: Finished difference. Result has 85 places, 50 transitions, 382 flow [2023-11-12 02:27:03,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=606, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=382, PETRI_PLACES=85, PETRI_TRANSITIONS=50} [2023-11-12 02:27:03,752 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 60 predicate places. [2023-11-12 02:27:03,752 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 50 transitions, 382 flow [2023-11-12 02:27:03,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 203.6) internal successors, (1018), 5 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) [2023-11-12 02:27:03,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:03,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:03,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-12 02:27:03,754 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:27:03,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:03,754 INFO L85 PathProgramCache]: Analyzing trace with hash 747242498, now seen corresponding path program 1 times [2023-11-12 02:27:03,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:03,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501999693] [2023-11-12 02:27:03,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:03,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:03,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:04,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:04,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:04,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501999693] [2023-11-12 02:27:04,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501999693] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:27:04,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425110515] [2023-11-12 02:27:04,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:04,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:04,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:04,327 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:04,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804c7236-82ba-400f-b348-e26707f1dcf1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:27:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:04,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-12 02:27:04,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:04,612 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 15 treesize of output 1 [2023-11-12 02:27:04,658 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 [2023-11-12 02:27:04,711 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 [2023-11-12 02:27:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:04,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:27:05,308 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:27:05,308 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 48 treesize of output 37 [2023-11-12 02:27:05,324 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:27:05,324 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 598 treesize of output 546 [2023-11-12 02:27:05,345 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:27:05,346 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 262 treesize of output 239 [2023-11-12 02:27:05,364 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:27:05,364 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 230 treesize of output 223 [2023-11-12 02:27:05,597 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:27:05,597 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 48 treesize of output 37 [2023-11-12 02:27:05,611 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:27:05,612 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 294 treesize of output 274 [2023-11-12 02:27:05,629 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:27:05,630 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 262 treesize of output 239 [2023-11-12 02:27:05,648 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:27:05,651 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 230 treesize of output 223 [2023-11-12 02:27:06,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:06,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425110515] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:27:06,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:27:06,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2023-11-12 02:27:06,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252631558] [2023-11-12 02:27:06,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:27:06,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-12 02:27:06,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:06,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-12 02:27:06,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=499, Unknown=16, NotChecked=0, Total=650