./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:04:17,104 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:04:17,239 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:04:17,256 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:04:17,257 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:04:17,297 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:04:17,298 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:04:17,299 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:04:17,301 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:04:17,307 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:04:17,309 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:04:17,309 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:04:17,310 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:04:17,312 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:04:17,313 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:04:17,313 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:04:17,314 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:04:17,314 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:04:17,315 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:04:17,315 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:04:17,316 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:04:17,317 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:04:17,317 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:04:17,317 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:04:17,318 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:04:17,319 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:04:17,320 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:04:17,320 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:04:17,321 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:04:17,321 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:04:17,323 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:04:17,323 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:04:17,323 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:04:17,324 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:04:17,324 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:04:17,324 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:04:17,325 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:04:17,325 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:04:17,325 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:04:17,325 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_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 [2023-11-06 23:04:17,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:04:17,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:04:17,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:04:17,741 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:04:17,742 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:04:17,743 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2023-11-06 23:04:21,008 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:04:21,267 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:04:21,268 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2023-11-06 23:04:21,277 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/data/1407690e3/d9c13411519945d4b6e5e6b6c7825c1b/FLAGa8e6dc0c3 [2023-11-06 23:04:21,292 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/data/1407690e3/d9c13411519945d4b6e5e6b6c7825c1b [2023-11-06 23:04:21,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:04:21,297 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:04:21,298 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:04:21,299 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:04:21,308 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:04:21,309 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:04:21" (1/1) ... [2023-11-06 23:04:21,310 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59a87290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:21, skipping insertion in model container [2023-11-06 23:04:21,310 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:04:21" (1/1) ... [2023-11-06 23:04:21,336 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:04:21,532 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_406710ed-a5f5-4115-83d6-06ace9343ea7/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2023-11-06 23:04:21,555 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:04:21,568 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:04:21,598 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_406710ed-a5f5-4115-83d6-06ace9343ea7/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2023-11-06 23:04:21,608 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:04:21,618 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:04:21,618 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:04:21,628 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:04:21,628 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:21 WrapperNode [2023-11-06 23:04:21,629 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:04:21,630 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:04:21,630 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:04:21,630 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:04:21,640 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:21" (1/1) ... [2023-11-06 23:04:21,661 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:21" (1/1) ... [2023-11-06 23:04:21,694 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 142 [2023-11-06 23:04:21,695 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:04:21,696 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:04:21,696 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:04:21,696 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:04:21,706 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:21" (1/1) ... [2023-11-06 23:04:21,707 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:21" (1/1) ... [2023-11-06 23:04:21,711 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:21" (1/1) ... [2023-11-06 23:04:21,711 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:21" (1/1) ... [2023-11-06 23:04:21,720 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:21" (1/1) ... [2023-11-06 23:04:21,725 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:21" (1/1) ... [2023-11-06 23:04:21,728 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:21" (1/1) ... [2023-11-06 23:04:21,730 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:21" (1/1) ... [2023-11-06 23:04:21,734 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:04:21,737 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:04:21,737 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:04:21,737 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:04:21,738 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:21" (1/1) ... [2023-11-06 23:04:21,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:04:21,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:21,806 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:04:21,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:04:21,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:04:21,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:04:21,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:04:21,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:04:21,870 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 23:04:21,872 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 23:04:21,872 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 23:04:21,872 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 23:04:21,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:04:21,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 23:04:21,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 23:04:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 23:04:21,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:04:21,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:04:21,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:04:21,880 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 23:04:22,071 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:04:22,073 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:04:22,548 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:04:22,816 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:04:22,816 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 23:04:22,820 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:04:22 BoogieIcfgContainer [2023-11-06 23:04:22,820 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:04:22,823 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:04:22,824 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:04:22,827 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:04:22,828 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:04:21" (1/3) ... [2023-11-06 23:04:22,829 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2d69cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:04:22, skipping insertion in model container [2023-11-06 23:04:22,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:21" (2/3) ... [2023-11-06 23:04:22,832 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2d69cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:04:22, skipping insertion in model container [2023-11-06 23:04:22,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:04:22" (3/3) ... [2023-11-06 23:04:22,834 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2023-11-06 23:04:22,846 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 23:04:22,859 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:04:22,859 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:04:22,860 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:04:22,942 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 23:04:22,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 118 transitions, 250 flow [2023-11-06 23:04:23,096 INFO L124 PetriNetUnfolderBase]: 9/116 cut-off events. [2023-11-06 23:04:23,097 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:04:23,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 116 events. 9/116 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 71 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 80. Up to 2 conditions per place. [2023-11-06 23:04:23,104 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 118 transitions, 250 flow [2023-11-06 23:04:23,113 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 107 transitions, 226 flow [2023-11-06 23:04:23,117 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:04:23,137 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 107 transitions, 226 flow [2023-11-06 23:04:23,140 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 107 transitions, 226 flow [2023-11-06 23:04:23,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 107 transitions, 226 flow [2023-11-06 23:04:23,179 INFO L124 PetriNetUnfolderBase]: 9/107 cut-off events. [2023-11-06 23:04:23,179 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:04:23,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 107 events. 9/107 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 70 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 80. Up to 2 conditions per place. [2023-11-06 23:04:23,182 INFO L119 LiptonReduction]: Number of co-enabled transitions 572 [2023-11-06 23:04:27,680 INFO L134 LiptonReduction]: Checked pairs total: 643 [2023-11-06 23:04:27,680 INFO L136 LiptonReduction]: Total number of compositions: 108 [2023-11-06 23:04:27,716 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:04:27,725 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@275003bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:04:27,725 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 23:04:27,740 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:04:27,740 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-06 23:04:27,741 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:04:27,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:27,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:27,743 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:04:27,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:27,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1725981171, now seen corresponding path program 1 times [2023-11-06 23:04:27,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:27,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144639799] [2023-11-06 23:04:27,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:27,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:28,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:28,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144639799] [2023-11-06 23:04:28,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144639799] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:28,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:28,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:04:28,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450951022] [2023-11-06 23:04:28,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:28,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:04:28,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:28,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:04:28,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:04:28,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 226 [2023-11-06 23:04:28,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:28,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:28,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 226 [2023-11-06 23:04:28,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:28,396 INFO L124 PetriNetUnfolderBase]: 66/116 cut-off events. [2023-11-06 23:04:28,397 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-06 23:04:28,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 116 events. 66/116 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 322 event pairs, 9 based on Foata normal form. 1/76 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-11-06 23:04:28,405 INFO L140 encePairwiseOnDemand]: 222/226 looper letters, 21 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2023-11-06 23:04:28,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 27 transitions, 125 flow [2023-11-06 23:04:28,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:04:28,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:04:28,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 338 transitions. [2023-11-06 23:04:28,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49852507374631266 [2023-11-06 23:04:28,426 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 338 transitions. [2023-11-06 23:04:28,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 338 transitions. [2023-11-06 23:04:28,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:28,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 338 transitions. [2023-11-06 23:04:28,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:28,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:28,450 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:28,452 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 338 transitions. [2023-11-06 23:04:28,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 27 transitions, 125 flow [2023-11-06 23:04:28,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 27 transitions, 111 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 23:04:28,459 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2023-11-06 23:04:28,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2023-11-06 23:04:28,467 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-06 23:04:28,467 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2023-11-06 23:04:28,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:28,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:28,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:28,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:04:28,469 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:04:28,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:28,481 INFO L85 PathProgramCache]: Analyzing trace with hash 384024530, now seen corresponding path program 1 times [2023-11-06 23:04:28,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:28,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303752241] [2023-11-06 23:04:28,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:28,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:28,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:28,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303752241] [2023-11-06 23:04:28,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303752241] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:28,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:28,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:04:28,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443653895] [2023-11-06 23:04:28,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:28,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:04:28,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:28,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:04:28,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:04:28,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 226 [2023-11-06 23:04:28,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 5 states, 5 states have (on average 93.8) internal successors, (469), 5 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:28,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:28,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 226 [2023-11-06 23:04:28,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:29,043 INFO L124 PetriNetUnfolderBase]: 113/217 cut-off events. [2023-11-06 23:04:29,043 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-11-06 23:04:29,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 217 events. 113/217 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 813 event pairs, 62 based on Foata normal form. 12/227 useless extension candidates. Maximal degree in co-relation 168. Up to 122 conditions per place. [2023-11-06 23:04:29,047 INFO L140 encePairwiseOnDemand]: 220/226 looper letters, 34 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-11-06 23:04:29,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 194 flow [2023-11-06 23:04:29,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:04:29,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:04:29,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 491 transitions. [2023-11-06 23:04:29,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4345132743362832 [2023-11-06 23:04:29,057 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 491 transitions. [2023-11-06 23:04:29,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 491 transitions. [2023-11-06 23:04:29,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:29,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 491 transitions. [2023-11-06 23:04:29,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:29,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 226.0) internal successors, (1356), 6 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:29,071 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 226.0) internal successors, (1356), 6 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:29,072 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 5 states and 491 transitions. [2023-11-06 23:04:29,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 194 flow [2023-11-06 23:04:29,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:04:29,077 INFO L231 Difference]: Finished difference. Result has 26 places, 23 transitions, 92 flow [2023-11-06 23:04:29,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=92, PETRI_PLACES=26, PETRI_TRANSITIONS=23} [2023-11-06 23:04:29,078 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-11-06 23:04:29,085 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 23 transitions, 92 flow [2023-11-06 23:04:29,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.8) internal successors, (469), 5 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:29,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:29,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:29,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:04:29,087 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:04:29,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:29,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1555213555, now seen corresponding path program 1 times [2023-11-06 23:04:29,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:29,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139308009] [2023-11-06 23:04:29,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:29,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:29,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:29,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:29,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139308009] [2023-11-06 23:04:29,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139308009] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:29,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:29,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:04:29,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952835967] [2023-11-06 23:04:29,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:29,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:04:29,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:29,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:04:29,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:04:29,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 226 [2023-11-06 23:04:29,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 93.8) internal successors, (469), 5 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:29,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:29,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 226 [2023-11-06 23:04:29,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:29,501 INFO L124 PetriNetUnfolderBase]: 79/162 cut-off events. [2023-11-06 23:04:29,501 INFO L125 PetriNetUnfolderBase]: For 95/101 co-relation queries the response was YES. [2023-11-06 23:04:29,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 162 events. 79/162 cut-off events. For 95/101 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 555 event pairs, 44 based on Foata normal form. 12/161 useless extension candidates. Maximal degree in co-relation 320. Up to 116 conditions per place. [2023-11-06 23:04:29,507 INFO L140 encePairwiseOnDemand]: 220/226 looper letters, 17 selfloop transitions, 2 changer transitions 16/36 dead transitions. [2023-11-06 23:04:29,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 36 transitions, 195 flow [2023-11-06 23:04:29,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:04:29,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:04:29,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 488 transitions. [2023-11-06 23:04:29,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.431858407079646 [2023-11-06 23:04:29,511 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 488 transitions. [2023-11-06 23:04:29,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 488 transitions. [2023-11-06 23:04:29,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:29,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 488 transitions. [2023-11-06 23:04:29,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 97.6) internal successors, (488), 5 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:29,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 226.0) internal successors, (1356), 6 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:29,521 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 226.0) internal successors, (1356), 6 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:29,521 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 92 flow. Second operand 5 states and 488 transitions. [2023-11-06 23:04:29,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 36 transitions, 195 flow [2023-11-06 23:04:29,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 36 transitions, 191 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 23:04:29,526 INFO L231 Difference]: Finished difference. Result has 31 places, 20 transitions, 80 flow [2023-11-06 23:04:29,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=80, PETRI_PLACES=31, PETRI_TRANSITIONS=20} [2023-11-06 23:04:29,528 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-11-06 23:04:29,532 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 80 flow [2023-11-06 23:04:29,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.8) internal successors, (469), 5 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:29,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:29,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:29,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:04:29,535 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:04:29,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:29,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1814161805, now seen corresponding path program 1 times [2023-11-06 23:04:29,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:29,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416261882] [2023-11-06 23:04:29,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:29,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:29,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:29,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416261882] [2023-11-06 23:04:29,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416261882] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:29,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923525364] [2023-11-06 23:04:29,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:29,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:29,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:29,723 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:29,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:04:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:29,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:04:29,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:29,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:29,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:30,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923525364] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:30,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:04:30,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-06 23:04:30,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670115292] [2023-11-06 23:04:30,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:30,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:04:30,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:30,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:04:30,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:04:30,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 226 [2023-11-06 23:04:30,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 20 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 93.0) internal successors, (465), 5 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:30,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:30,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 226 [2023-11-06 23:04:30,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:30,207 INFO L124 PetriNetUnfolderBase]: 68/122 cut-off events. [2023-11-06 23:04:30,208 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2023-11-06 23:04:30,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 122 events. 68/122 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 334 event pairs, 23 based on Foata normal form. 12/133 useless extension candidates. Maximal degree in co-relation 354. Up to 92 conditions per place. [2023-11-06 23:04:30,209 INFO L140 encePairwiseOnDemand]: 221/226 looper letters, 21 selfloop transitions, 5 changer transitions 0/27 dead transitions. [2023-11-06 23:04:30,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 159 flow [2023-11-06 23:04:30,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:04:30,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:04:30,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 474 transitions. [2023-11-06 23:04:30,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4194690265486726 [2023-11-06 23:04:30,213 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 474 transitions. [2023-11-06 23:04:30,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 474 transitions. [2023-11-06 23:04:30,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:30,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 474 transitions. [2023-11-06 23:04:30,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.8) internal successors, (474), 5 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:30,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 226.0) internal successors, (1356), 6 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:30,221 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 226.0) internal successors, (1356), 6 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:30,221 INFO L175 Difference]: Start difference. First operand has 31 places, 20 transitions, 80 flow. Second operand 5 states and 474 transitions. [2023-11-06 23:04:30,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 159 flow [2023-11-06 23:04:30,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 27 transitions, 133 flow, removed 11 selfloop flow, removed 6 redundant places. [2023-11-06 23:04:30,226 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 81 flow [2023-11-06 23:04:30,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=81, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2023-11-06 23:04:30,228 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-11-06 23:04:30,228 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 81 flow [2023-11-06 23:04:30,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.0) internal successors, (465), 5 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:30,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:30,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:30,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:30,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:30,440 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:04:30,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:30,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1505502288, now seen corresponding path program 1 times [2023-11-06 23:04:30,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:30,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933639057] [2023-11-06 23:04:30,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:30,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:30,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:30,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933639057] [2023-11-06 23:04:30,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933639057] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:30,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937482693] [2023-11-06 23:04:30,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:30,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:30,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:30,577 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:30,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:04:30,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:30,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:04:30,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:30,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:30,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:30,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:30,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937482693] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:30,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:04:30,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-06 23:04:30,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923011056] [2023-11-06 23:04:30,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:30,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:04:30,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:30,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:04:30,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:04:30,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 226 [2023-11-06 23:04:30,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 81 flow. Second operand has 5 states, 5 states have (on average 93.0) internal successors, (465), 5 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:30,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:30,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 226 [2023-11-06 23:04:30,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:30,951 INFO L124 PetriNetUnfolderBase]: 52/97 cut-off events. [2023-11-06 23:04:30,952 INFO L125 PetriNetUnfolderBase]: For 65/72 co-relation queries the response was YES. [2023-11-06 23:04:30,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 97 events. 52/97 cut-off events. For 65/72 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 225 event pairs, 20 based on Foata normal form. 15/108 useless extension candidates. Maximal degree in co-relation 267. Up to 75 conditions per place. [2023-11-06 23:04:30,953 INFO L140 encePairwiseOnDemand]: 221/226 looper letters, 22 selfloop transitions, 5 changer transitions 0/28 dead transitions. [2023-11-06 23:04:30,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 28 transitions, 163 flow [2023-11-06 23:04:30,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:04:30,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:04:30,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 474 transitions. [2023-11-06 23:04:30,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4194690265486726 [2023-11-06 23:04:30,957 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 474 transitions. [2023-11-06 23:04:30,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 474 transitions. [2023-11-06 23:04:30,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:30,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 474 transitions. [2023-11-06 23:04:30,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.8) internal successors, (474), 5 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:30,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 226.0) internal successors, (1356), 6 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:30,967 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 226.0) internal successors, (1356), 6 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:30,967 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 81 flow. Second operand 5 states and 474 transitions. [2023-11-06 23:04:30,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 28 transitions, 163 flow [2023-11-06 23:04:30,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 28 transitions, 149 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-06 23:04:30,971 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 91 flow [2023-11-06 23:04:30,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-11-06 23:04:30,974 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-11-06 23:04:30,978 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 91 flow [2023-11-06 23:04:30,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.0) internal successors, (465), 5 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:30,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:30,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:30,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:31,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:31,186 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:04:31,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:31,186 INFO L85 PathProgramCache]: Analyzing trace with hash 75797240, now seen corresponding path program 1 times [2023-11-06 23:04:31,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:31,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251614097] [2023-11-06 23:04:31,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:31,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:31,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:31,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:31,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251614097] [2023-11-06 23:04:31,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251614097] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:31,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056468501] [2023-11-06 23:04:31,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:31,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:31,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:31,775 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:31,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:04:31,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:31,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 23:04:31,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:31,958 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 23:04:32,006 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:04:32,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:32,104 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 23:04:32,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:32,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:32,195 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_105 (Array Int Int))) (= c_~counter~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_105) c_~A~0.base) c_~A~0.offset))) is different from false [2023-11-06 23:04:32,302 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_105 (Array Int Int)) (v_ArrVal_104 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_104))) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_105) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (+ (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) c_~counter~0)))) is different from false [2023-11-06 23:04:32,315 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:32,315 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 46 treesize of output 35 [2023-11-06 23:04:32,324 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 286 treesize of output 254 [2023-11-06 23:04:32,340 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2023-11-06 23:04:32,359 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-06 23:04:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-06 23:04:32,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056468501] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:32,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:32,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2023-11-06 23:04:32,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817833964] [2023-11-06 23:04:32,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:32,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 23:04:32,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:32,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 23:04:32,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=266, Unknown=11, NotChecked=70, Total=420 [2023-11-06 23:04:32,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 226 [2023-11-06 23:04:32,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 91 flow. Second operand has 21 states, 21 states have (on average 65.61904761904762) internal successors, (1378), 21 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:32,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:32,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 226 [2023-11-06 23:04:32,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:32,843 INFO L124 PetriNetUnfolderBase]: 110/198 cut-off events. [2023-11-06 23:04:32,843 INFO L125 PetriNetUnfolderBase]: For 107/107 co-relation queries the response was YES. [2023-11-06 23:04:32,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 198 events. 110/198 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 610 event pairs, 5 based on Foata normal form. 1/198 useless extension candidates. Maximal degree in co-relation 587. Up to 115 conditions per place. [2023-11-06 23:04:32,846 INFO L140 encePairwiseOnDemand]: 218/226 looper letters, 39 selfloop transitions, 14 changer transitions 1/54 dead transitions. [2023-11-06 23:04:32,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 54 transitions, 309 flow [2023-11-06 23:04:32,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:04:32,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 23:04:32,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 564 transitions. [2023-11-06 23:04:32,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31194690265486724 [2023-11-06 23:04:32,850 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 564 transitions. [2023-11-06 23:04:32,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 564 transitions. [2023-11-06 23:04:32,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:32,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 564 transitions. [2023-11-06 23:04:32,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 70.5) internal successors, (564), 8 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:32,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 226.0) internal successors, (2034), 9 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:32,858 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 226.0) internal successors, (2034), 9 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:32,859 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 91 flow. Second operand 8 states and 564 transitions. [2023-11-06 23:04:32,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 54 transitions, 309 flow [2023-11-06 23:04:32,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 54 transitions, 297 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-06 23:04:32,862 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 174 flow [2023-11-06 23:04:32,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=174, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-11-06 23:04:32,863 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2023-11-06 23:04:32,863 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 174 flow [2023-11-06 23:04:32,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 65.61904761904762) internal successors, (1378), 21 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:32,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:32,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:32,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-06 23:04:33,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 23:04:33,071 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:04:33,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:33,071 INFO L85 PathProgramCache]: Analyzing trace with hash -797350176, now seen corresponding path program 2 times [2023-11-06 23:04:33,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:33,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103599642] [2023-11-06 23:04:33,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:33,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:33,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:33,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:33,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:33,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103599642] [2023-11-06 23:04:33,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103599642] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:33,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117319339] [2023-11-06 23:04:33,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:04:33,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:33,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:33,892 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:33,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:04:34,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:04:34,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:04:34,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 23:04:34,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:34,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:34,141 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:34,142 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 21 treesize of output 14 [2023-11-06 23:04:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:34,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117319339] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:34,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:34,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 4] total 12 [2023-11-06 23:04:34,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897185658] [2023-11-06 23:04:34,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:34,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:04:34,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:34,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:04:34,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:04:34,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 226 [2023-11-06 23:04:34,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 174 flow. Second operand has 14 states, 14 states have (on average 83.57142857142857) internal successors, (1170), 14 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:34,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:34,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 226 [2023-11-06 23:04:34,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:34,916 INFO L124 PetriNetUnfolderBase]: 137/246 cut-off events. [2023-11-06 23:04:34,916 INFO L125 PetriNetUnfolderBase]: For 272/272 co-relation queries the response was YES. [2023-11-06 23:04:34,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 892 conditions, 246 events. 137/246 cut-off events. For 272/272 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 780 event pairs, 25 based on Foata normal form. 1/247 useless extension candidates. Maximal degree in co-relation 868. Up to 190 conditions per place. [2023-11-06 23:04:34,919 INFO L140 encePairwiseOnDemand]: 218/226 looper letters, 39 selfloop transitions, 15 changer transitions 1/55 dead transitions. [2023-11-06 23:04:34,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 389 flow [2023-11-06 23:04:34,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:04:34,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:04:34,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 775 transitions. [2023-11-06 23:04:34,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3810226155358899 [2023-11-06 23:04:34,923 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 775 transitions. [2023-11-06 23:04:34,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 775 transitions. [2023-11-06 23:04:34,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:34,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 775 transitions. [2023-11-06 23:04:34,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 86.11111111111111) internal successors, (775), 9 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:34,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 226.0) internal successors, (2260), 10 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:34,932 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 226.0) internal successors, (2260), 10 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:34,932 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 174 flow. Second operand 9 states and 775 transitions. [2023-11-06 23:04:34,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 389 flow [2023-11-06 23:04:34,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 55 transitions, 375 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-06 23:04:34,937 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 283 flow [2023-11-06 23:04:34,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=283, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-11-06 23:04:34,938 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2023-11-06 23:04:34,938 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 283 flow [2023-11-06 23:04:34,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 83.57142857142857) internal successors, (1170), 14 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:34,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:34,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:34,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:35,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 23:04:35,146 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:04:35,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:35,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1398270806, now seen corresponding path program 3 times [2023-11-06 23:04:35,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:35,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590979919] [2023-11-06 23:04:35,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:35,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:35,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:35,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:35,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590979919] [2023-11-06 23:04:35,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590979919] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:35,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57192410] [2023-11-06 23:04:35,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:04:35,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:35,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:35,433 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:35,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:04:35,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 23:04:35,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:04:35,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 23:04:35,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:35,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:35,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:35,691 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:35,691 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 21 treesize of output 14 [2023-11-06 23:04:35,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:35,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57192410] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:35,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:35,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-11-06 23:04:35,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771787298] [2023-11-06 23:04:35,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:35,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 23:04:35,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:35,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 23:04:35,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:04:35,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 226 [2023-11-06 23:04:35,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 283 flow. Second operand has 11 states, 11 states have (on average 92.63636363636364) internal successors, (1019), 11 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:35,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:35,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 226 [2023-11-06 23:04:35,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:36,243 INFO L124 PetriNetUnfolderBase]: 159/285 cut-off events. [2023-11-06 23:04:36,243 INFO L125 PetriNetUnfolderBase]: For 544/544 co-relation queries the response was YES. [2023-11-06 23:04:36,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1128 conditions, 285 events. 159/285 cut-off events. For 544/544 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 954 event pairs, 39 based on Foata normal form. 1/286 useless extension candidates. Maximal degree in co-relation 1097. Up to 233 conditions per place. [2023-11-06 23:04:36,247 INFO L140 encePairwiseOnDemand]: 219/226 looper letters, 43 selfloop transitions, 15 changer transitions 1/59 dead transitions. [2023-11-06 23:04:36,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 59 transitions, 483 flow [2023-11-06 23:04:36,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:04:36,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 23:04:36,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 673 transitions. [2023-11-06 23:04:36,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254108723135272 [2023-11-06 23:04:36,251 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 673 transitions. [2023-11-06 23:04:36,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 673 transitions. [2023-11-06 23:04:36,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:36,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 673 transitions. [2023-11-06 23:04:36,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.14285714285714) internal successors, (673), 7 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:36,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 226.0) internal successors, (1808), 8 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:36,258 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 226.0) internal successors, (1808), 8 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:36,258 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 283 flow. Second operand 7 states and 673 transitions. [2023-11-06 23:04:36,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 59 transitions, 483 flow [2023-11-06 23:04:36,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 59 transitions, 451 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-06 23:04:36,265 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 351 flow [2023-11-06 23:04:36,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=351, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-11-06 23:04:36,268 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2023-11-06 23:04:36,268 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 351 flow [2023-11-06 23:04:36,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 92.63636363636364) internal successors, (1019), 11 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:36,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:36,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:36,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:36,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:36,476 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:04:36,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:36,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1143854870, now seen corresponding path program 4 times [2023-11-06 23:04:36,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:36,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280441776] [2023-11-06 23:04:36,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:36,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:36,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:36,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:36,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280441776] [2023-11-06 23:04:36,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280441776] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:36,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403541391] [2023-11-06 23:04:36,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:04:36,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:36,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:36,787 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:36,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:04:36,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:04:36,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:04:36,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 23:04:36,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:36,957 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 23:04:37,006 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:04:37,038 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:04:37,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:37,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:37,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403541391] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:37,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:37,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 4] total 12 [2023-11-06 23:04:37,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885122313] [2023-11-06 23:04:37,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:37,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:04:37,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:37,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:04:37,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:04:37,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 226 [2023-11-06 23:04:37,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 351 flow. Second operand has 14 states, 14 states have (on average 83.42857142857143) internal successors, (1168), 14 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:37,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:37,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 226 [2023-11-06 23:04:37,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:38,024 INFO L124 PetriNetUnfolderBase]: 175/314 cut-off events. [2023-11-06 23:04:38,025 INFO L125 PetriNetUnfolderBase]: For 701/701 co-relation queries the response was YES. [2023-11-06 23:04:38,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1299 conditions, 314 events. 175/314 cut-off events. For 701/701 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1105 event pairs, 37 based on Foata normal form. 1/315 useless extension candidates. Maximal degree in co-relation 1266. Up to 258 conditions per place. [2023-11-06 23:04:38,029 INFO L140 encePairwiseOnDemand]: 218/226 looper letters, 48 selfloop transitions, 16 changer transitions 1/65 dead transitions. [2023-11-06 23:04:38,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 65 transitions, 559 flow [2023-11-06 23:04:38,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:04:38,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:04:38,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 777 transitions. [2023-11-06 23:04:38,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38200589970501475 [2023-11-06 23:04:38,034 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 777 transitions. [2023-11-06 23:04:38,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 777 transitions. [2023-11-06 23:04:38,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:38,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 777 transitions. [2023-11-06 23:04:38,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 86.33333333333333) internal successors, (777), 9 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:38,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 226.0) internal successors, (2260), 10 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:38,043 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 226.0) internal successors, (2260), 10 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:38,043 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 351 flow. Second operand 9 states and 777 transitions. [2023-11-06 23:04:38,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 65 transitions, 559 flow [2023-11-06 23:04:38,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 65 transitions, 538 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-06 23:04:38,050 INFO L231 Difference]: Finished difference. Result has 58 places, 48 transitions, 409 flow [2023-11-06 23:04:38,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=409, PETRI_PLACES=58, PETRI_TRANSITIONS=48} [2023-11-06 23:04:38,052 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 37 predicate places. [2023-11-06 23:04:38,052 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 48 transitions, 409 flow [2023-11-06 23:04:38,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 83.42857142857143) internal successors, (1168), 14 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:38,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:38,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:38,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:38,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:38,260 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:04:38,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:38,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1743079584, now seen corresponding path program 5 times [2023-11-06 23:04:38,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:38,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494398101] [2023-11-06 23:04:38,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:38,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:38,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:38,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:38,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494398101] [2023-11-06 23:04:38,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494398101] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:38,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970415775] [2023-11-06 23:04:38,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:04:38,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:38,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:38,573 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:38,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:04:38,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:04:38,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:04:38,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 23:04:38,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:38,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:38,786 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:38,787 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 21 treesize of output 14 [2023-11-06 23:04:38,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:38,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970415775] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:38,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:38,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-11-06 23:04:38,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527338257] [2023-11-06 23:04:38,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:38,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 23:04:38,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:38,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 23:04:38,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:04:39,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 226 [2023-11-06 23:04:39,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 48 transitions, 409 flow. Second operand has 11 states, 11 states have (on average 92.63636363636364) internal successors, (1019), 11 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:39,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:39,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 226 [2023-11-06 23:04:39,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:39,326 INFO L124 PetriNetUnfolderBase]: 197/353 cut-off events. [2023-11-06 23:04:39,327 INFO L125 PetriNetUnfolderBase]: For 1110/1110 co-relation queries the response was YES. [2023-11-06 23:04:39,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1531 conditions, 353 events. 197/353 cut-off events. For 1110/1110 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1283 event pairs, 53 based on Foata normal form. 1/354 useless extension candidates. Maximal degree in co-relation 1493. Up to 301 conditions per place. [2023-11-06 23:04:39,332 INFO L140 encePairwiseOnDemand]: 219/226 looper letters, 48 selfloop transitions, 15 changer transitions 1/64 dead transitions. [2023-11-06 23:04:39,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 64 transitions, 618 flow [2023-11-06 23:04:39,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:04:39,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 23:04:39,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 671 transitions. [2023-11-06 23:04:39,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42414664981036665 [2023-11-06 23:04:39,337 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 671 transitions. [2023-11-06 23:04:39,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 671 transitions. [2023-11-06 23:04:39,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:39,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 671 transitions. [2023-11-06 23:04:39,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 95.85714285714286) internal successors, (671), 7 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:39,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 226.0) internal successors, (1808), 8 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:39,347 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 226.0) internal successors, (1808), 8 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:39,347 INFO L175 Difference]: Start difference. First operand has 58 places, 48 transitions, 409 flow. Second operand 7 states and 671 transitions. [2023-11-06 23:04:39,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 64 transitions, 618 flow [2023-11-06 23:04:39,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 64 transitions, 576 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-11-06 23:04:39,357 INFO L231 Difference]: Finished difference. Result has 61 places, 52 transitions, 463 flow [2023-11-06 23:04:39,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=463, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2023-11-06 23:04:39,359 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 40 predicate places. [2023-11-06 23:04:39,359 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 463 flow [2023-11-06 23:04:39,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 92.63636363636364) internal successors, (1019), 11 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:39,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:39,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:39,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:39,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 23:04:39,567 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:04:39,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:39,568 INFO L85 PathProgramCache]: Analyzing trace with hash -685480930, now seen corresponding path program 6 times [2023-11-06 23:04:39,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:39,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058713110] [2023-11-06 23:04:39,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:39,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:39,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:39,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:39,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:39,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058713110] [2023-11-06 23:04:39,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058713110] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:39,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616370498] [2023-11-06 23:04:39,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:04:39,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:39,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:39,936 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:39,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:04:40,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 23:04:40,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:04:40,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 23:04:40,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:40,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:40,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:40,170 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:40,171 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 17 treesize of output 14 [2023-11-06 23:04:40,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:40,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616370498] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:40,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:40,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-11-06 23:04:40,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253457737] [2023-11-06 23:04:40,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:40,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 23:04:40,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:40,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 23:04:40,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:04:40,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 226 [2023-11-06 23:04:40,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 52 transitions, 463 flow. Second operand has 11 states, 11 states have (on average 92.63636363636364) internal successors, (1019), 11 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:40,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:40,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 226 [2023-11-06 23:04:40,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:40,628 INFO L124 PetriNetUnfolderBase]: 225/402 cut-off events. [2023-11-06 23:04:40,629 INFO L125 PetriNetUnfolderBase]: For 1396/1396 co-relation queries the response was YES. [2023-11-06 23:04:40,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1768 conditions, 402 events. 225/402 cut-off events. For 1396/1396 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1518 event pairs, 47 based on Foata normal form. 1/403 useless extension candidates. Maximal degree in co-relation 1728. Up to 330 conditions per place. [2023-11-06 23:04:40,635 INFO L140 encePairwiseOnDemand]: 219/226 looper letters, 50 selfloop transitions, 20 changer transitions 1/71 dead transitions. [2023-11-06 23:04:40,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 71 transitions, 720 flow [2023-11-06 23:04:40,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:04:40,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 23:04:40,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 673 transitions. [2023-11-06 23:04:40,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254108723135272 [2023-11-06 23:04:40,639 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 673 transitions. [2023-11-06 23:04:40,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 673 transitions. [2023-11-06 23:04:40,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:40,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 673 transitions. [2023-11-06 23:04:40,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.14285714285714) internal successors, (673), 7 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:40,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 226.0) internal successors, (1808), 8 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:40,648 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 226.0) internal successors, (1808), 8 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:40,648 INFO L175 Difference]: Start difference. First operand has 61 places, 52 transitions, 463 flow. Second operand 7 states and 673 transitions. [2023-11-06 23:04:40,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 71 transitions, 720 flow [2023-11-06 23:04:40,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 71 transitions, 687 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-11-06 23:04:40,657 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 577 flow [2023-11-06 23:04:40,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=577, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2023-11-06 23:04:40,658 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 46 predicate places. [2023-11-06 23:04:40,658 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 577 flow [2023-11-06 23:04:40,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 92.63636363636364) internal successors, (1019), 11 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:40,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:40,659 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:40,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:40,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:40,866 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:04:40,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:40,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1266476304, now seen corresponding path program 7 times [2023-11-06 23:04:40,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:40,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119803160] [2023-11-06 23:04:40,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:40,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:40,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:41,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:41,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:41,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119803160] [2023-11-06 23:04:41,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119803160] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:41,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874060053] [2023-11-06 23:04:41,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:04:41,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:41,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:41,005 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:41,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:04:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:41,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:04:41,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:41,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:41,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:41,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:41,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874060053] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:41,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:41,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-06 23:04:41,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601017691] [2023-11-06 23:04:41,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:41,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:04:41,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:41,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:04:41,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:04:41,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 226 [2023-11-06 23:04:41,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 577 flow. Second operand has 14 states, 14 states have (on average 92.42857142857143) internal successors, (1294), 14 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:41,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:41,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 226 [2023-11-06 23:04:41,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:41,822 INFO L124 PetriNetUnfolderBase]: 371/696 cut-off events. [2023-11-06 23:04:41,822 INFO L125 PetriNetUnfolderBase]: For 3409/3433 co-relation queries the response was YES. [2023-11-06 23:04:41,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3113 conditions, 696 events. 371/696 cut-off events. For 3409/3433 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3360 event pairs, 151 based on Foata normal form. 56/744 useless extension candidates. Maximal degree in co-relation 2599. Up to 378 conditions per place. [2023-11-06 23:04:41,831 INFO L140 encePairwiseOnDemand]: 220/226 looper letters, 97 selfloop transitions, 16 changer transitions 0/117 dead transitions. [2023-11-06 23:04:41,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 117 transitions, 1343 flow [2023-11-06 23:04:41,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:04:41,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 23:04:41,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 673 transitions. [2023-11-06 23:04:41,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254108723135272 [2023-11-06 23:04:41,837 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 673 transitions. [2023-11-06 23:04:41,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 673 transitions. [2023-11-06 23:04:41,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:41,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 673 transitions. [2023-11-06 23:04:41,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.14285714285714) internal successors, (673), 7 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:41,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 226.0) internal successors, (1808), 8 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:41,844 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 226.0) internal successors, (1808), 8 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:41,844 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 577 flow. Second operand 7 states and 673 transitions. [2023-11-06 23:04:41,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 117 transitions, 1343 flow [2023-11-06 23:04:41,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 117 transitions, 1256 flow, removed 36 selfloop flow, removed 2 redundant places. [2023-11-06 23:04:41,860 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 785 flow [2023-11-06 23:04:41,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=785, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2023-11-06 23:04:41,861 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 54 predicate places. [2023-11-06 23:04:41,861 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 785 flow [2023-11-06 23:04:41,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 92.42857142857143) internal successors, (1294), 14 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:41,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:41,863 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:41,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:42,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:42,069 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:04:42,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:42,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1274548941, now seen corresponding path program 8 times [2023-11-06 23:04:42,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:42,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946076079] [2023-11-06 23:04:42,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:42,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:42,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:42,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:42,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:42,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946076079] [2023-11-06 23:04:42,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946076079] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:42,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249018667] [2023-11-06 23:04:42,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:04:42,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:42,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:42,171 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:42,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:04:42,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:04:42,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:04:42,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:04:42,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:42,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:42,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249018667] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:42,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:42,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-06 23:04:42,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328619857] [2023-11-06 23:04:42,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:42,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:04:42,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:42,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:04:42,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:04:42,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 226 [2023-11-06 23:04:42,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 785 flow. Second operand has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:42,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:42,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 226 [2023-11-06 23:04:42,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:42,873 INFO L124 PetriNetUnfolderBase]: 305/610 cut-off events. [2023-11-06 23:04:42,873 INFO L125 PetriNetUnfolderBase]: For 2774/2805 co-relation queries the response was YES. [2023-11-06 23:04:42,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2768 conditions, 610 events. 305/610 cut-off events. For 2774/2805 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3059 event pairs, 143 based on Foata normal form. 63/671 useless extension candidates. Maximal degree in co-relation 2431. Up to 380 conditions per place. [2023-11-06 23:04:42,880 INFO L140 encePairwiseOnDemand]: 220/226 looper letters, 52 selfloop transitions, 3 changer transitions 39/98 dead transitions. [2023-11-06 23:04:42,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 98 transitions, 1127 flow [2023-11-06 23:04:42,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:04:42,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 23:04:42,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 672 transitions. [2023-11-06 23:04:42,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4247787610619469 [2023-11-06 23:04:42,884 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 672 transitions. [2023-11-06 23:04:42,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 672 transitions. [2023-11-06 23:04:42,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:42,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 672 transitions. [2023-11-06 23:04:42,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.0) internal successors, (672), 7 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:42,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 226.0) internal successors, (1808), 8 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:42,921 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 226.0) internal successors, (1808), 8 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:42,921 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 785 flow. Second operand 7 states and 672 transitions. [2023-11-06 23:04:42,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 98 transitions, 1127 flow [2023-11-06 23:04:42,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 98 transitions, 1111 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-06 23:04:42,936 INFO L231 Difference]: Finished difference. Result has 82 places, 59 transitions, 632 flow [2023-11-06 23:04:42,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=632, PETRI_PLACES=82, PETRI_TRANSITIONS=59} [2023-11-06 23:04:42,937 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 61 predicate places. [2023-11-06 23:04:42,937 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 59 transitions, 632 flow [2023-11-06 23:04:42,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:42,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:42,939 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:42,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:43,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 23:04:43,145 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:04:43,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:43,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1807619826, now seen corresponding path program 9 times [2023-11-06 23:04:43,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:43,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458647062] [2023-11-06 23:04:43,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:43,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:04:43,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:43,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458647062] [2023-11-06 23:04:43,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458647062] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:43,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638952975] [2023-11-06 23:04:43,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:04:43,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:43,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:43,274 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:43,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:04:43,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 23:04:43,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:04:43,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:04:43,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:04:43,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:43,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:04:43,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638952975] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:43,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:43,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-06 23:04:43,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741604229] [2023-11-06 23:04:43,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:43,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:04:43,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:43,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:04:43,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:04:43,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 226 [2023-11-06 23:04:43,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 59 transitions, 632 flow. Second operand has 14 states, 14 states have (on average 92.14285714285714) internal successors, (1290), 14 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:43,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:43,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 226 [2023-11-06 23:04:43,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:43,998 INFO L124 PetriNetUnfolderBase]: 166/297 cut-off events. [2023-11-06 23:04:43,998 INFO L125 PetriNetUnfolderBase]: For 1974/1981 co-relation queries the response was YES. [2023-11-06 23:04:44,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1679 conditions, 297 events. 166/297 cut-off events. For 1974/1981 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1040 event pairs, 28 based on Foata normal form. 51/348 useless extension candidates. Maximal degree in co-relation 1633. Up to 137 conditions per place. [2023-11-06 23:04:44,004 INFO L140 encePairwiseOnDemand]: 220/226 looper letters, 40 selfloop transitions, 26 changer transitions 0/70 dead transitions. [2023-11-06 23:04:44,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 70 transitions, 848 flow [2023-11-06 23:04:44,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:04:44,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 23:04:44,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 751 transitions. [2023-11-06 23:04:44,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153761061946903 [2023-11-06 23:04:44,009 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 751 transitions. [2023-11-06 23:04:44,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 751 transitions. [2023-11-06 23:04:44,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:44,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 751 transitions. [2023-11-06 23:04:44,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 93.875) internal successors, (751), 8 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:44,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 226.0) internal successors, (2034), 9 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:44,018 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 226.0) internal successors, (2034), 9 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:44,018 INFO L175 Difference]: Start difference. First operand has 82 places, 59 transitions, 632 flow. Second operand 8 states and 751 transitions. [2023-11-06 23:04:44,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 70 transitions, 848 flow [2023-11-06 23:04:44,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 70 transitions, 708 flow, removed 67 selfloop flow, removed 9 redundant places. [2023-11-06 23:04:44,031 INFO L231 Difference]: Finished difference. Result has 75 places, 60 transitions, 592 flow [2023-11-06 23:04:44,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=592, PETRI_PLACES=75, PETRI_TRANSITIONS=60} [2023-11-06 23:04:44,032 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 54 predicate places. [2023-11-06 23:04:44,033 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 60 transitions, 592 flow [2023-11-06 23:04:44,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 92.14285714285714) internal successors, (1290), 14 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:44,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:44,034 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:44,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:44,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 23:04:44,241 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:04:44,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:44,242 INFO L85 PathProgramCache]: Analyzing trace with hash -641615885, now seen corresponding path program 10 times [2023-11-06 23:04:44,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:44,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214165183] [2023-11-06 23:04:44,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:44,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:04:44,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:44,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214165183] [2023-11-06 23:04:44,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214165183] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:44,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724290935] [2023-11-06 23:04:44,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:04:44,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:44,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:44,346 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:44,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 23:04:44,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:04:44,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:04:44,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:04:44,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:04:44,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:04:44,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724290935] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:44,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:44,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-06 23:04:44,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843322192] [2023-11-06 23:04:44,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:44,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:04:44,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:44,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:04:44,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:04:44,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 226 [2023-11-06 23:04:44,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 60 transitions, 592 flow. Second operand has 14 states, 14 states have (on average 92.14285714285714) internal successors, (1290), 14 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:44,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:44,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 226 [2023-11-06 23:04:44,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:45,008 INFO L124 PetriNetUnfolderBase]: 120/214 cut-off events. [2023-11-06 23:04:45,008 INFO L125 PetriNetUnfolderBase]: For 1578/1584 co-relation queries the response was YES. [2023-11-06 23:04:45,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274 conditions, 214 events. 120/214 cut-off events. For 1578/1584 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 644 event pairs, 27 based on Foata normal form. 30/240 useless extension candidates. Maximal degree in co-relation 1218. Up to 116 conditions per place. [2023-11-06 23:04:45,012 INFO L140 encePairwiseOnDemand]: 220/226 looper letters, 41 selfloop transitions, 26 changer transitions 0/71 dead transitions. [2023-11-06 23:04:45,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 71 transitions, 810 flow [2023-11-06 23:04:45,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:04:45,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 23:04:45,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 751 transitions. [2023-11-06 23:04:45,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153761061946903 [2023-11-06 23:04:45,019 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 751 transitions. [2023-11-06 23:04:45,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 751 transitions. [2023-11-06 23:04:45,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:45,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 751 transitions. [2023-11-06 23:04:45,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 93.875) internal successors, (751), 8 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:45,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 226.0) internal successors, (2034), 9 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:45,066 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 226.0) internal successors, (2034), 9 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:45,066 INFO L175 Difference]: Start difference. First operand has 75 places, 60 transitions, 592 flow. Second operand 8 states and 751 transitions. [2023-11-06 23:04:45,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 71 transitions, 810 flow [2023-11-06 23:04:45,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 71 transitions, 732 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-11-06 23:04:45,082 INFO L231 Difference]: Finished difference. Result has 77 places, 61 transitions, 606 flow [2023-11-06 23:04:45,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=606, PETRI_PLACES=77, PETRI_TRANSITIONS=61} [2023-11-06 23:04:45,087 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 56 predicate places. [2023-11-06 23:04:45,087 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 61 transitions, 606 flow [2023-11-06 23:04:45,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 92.14285714285714) internal successors, (1290), 14 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:45,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:45,089 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:45,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:45,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 23:04:45,295 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:04:45,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:45,296 INFO L85 PathProgramCache]: Analyzing trace with hash -2049845841, now seen corresponding path program 11 times [2023-11-06 23:04:45,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:45,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482115746] [2023-11-06 23:04:45,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:45,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:46,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:46,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:46,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482115746] [2023-11-06 23:04:46,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482115746] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:46,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227269412] [2023-11-06 23:04:46,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:04:46,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:46,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:46,214 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:46,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 23:04:46,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:04:46,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:04:46,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-06 23:04:46,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:46,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:46,644 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 15 [2023-11-06 23:04:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:46,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:47,022 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:47,022 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 66 [2023-11-06 23:04:47,034 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:47,035 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 18 treesize of output 12 [2023-11-06 23:04:47,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:04:47,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227269412] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:47,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:47,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 26 [2023-11-06 23:04:47,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23492867] [2023-11-06 23:04:47,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:47,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 23:04:47,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:47,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 23:04:47,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=642, Unknown=12, NotChecked=0, Total=756 [2023-11-06 23:04:47,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 226 [2023-11-06 23:04:47,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 61 transitions, 606 flow. Second operand has 28 states, 28 states have (on average 65.75) internal successors, (1841), 28 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:47,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:47,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 226 [2023-11-06 23:04:47,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:48,382 INFO L124 PetriNetUnfolderBase]: 179/316 cut-off events. [2023-11-06 23:04:48,383 INFO L125 PetriNetUnfolderBase]: For 1961/1961 co-relation queries the response was YES. [2023-11-06 23:04:48,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1839 conditions, 316 events. 179/316 cut-off events. For 1961/1961 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1050 event pairs, 6 based on Foata normal form. 1/317 useless extension candidates. Maximal degree in co-relation 1782. Up to 196 conditions per place. [2023-11-06 23:04:48,389 INFO L140 encePairwiseOnDemand]: 218/226 looper letters, 68 selfloop transitions, 31 changer transitions 1/100 dead transitions. [2023-11-06 23:04:48,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 100 transitions, 1035 flow [2023-11-06 23:04:48,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 23:04:48,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 23:04:48,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 903 transitions. [2023-11-06 23:04:48,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3073519400953029 [2023-11-06 23:04:48,398 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 903 transitions. [2023-11-06 23:04:48,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 903 transitions. [2023-11-06 23:04:48,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:48,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 903 transitions. [2023-11-06 23:04:48,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 69.46153846153847) internal successors, (903), 13 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:48,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 226.0) internal successors, (3164), 14 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:48,410 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 226.0) internal successors, (3164), 14 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:48,411 INFO L175 Difference]: Start difference. First operand has 77 places, 61 transitions, 606 flow. Second operand 13 states and 903 transitions. [2023-11-06 23:04:48,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 100 transitions, 1035 flow [2023-11-06 23:04:48,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 100 transitions, 985 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-11-06 23:04:48,423 INFO L231 Difference]: Finished difference. Result has 86 places, 70 transitions, 783 flow [2023-11-06 23:04:48,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=783, PETRI_PLACES=86, PETRI_TRANSITIONS=70} [2023-11-06 23:04:48,424 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2023-11-06 23:04:48,425 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 70 transitions, 783 flow [2023-11-06 23:04:48,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 65.75) internal successors, (1841), 28 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:48,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:48,426 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:48,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:48,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 23:04:48,632 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:04:48,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:48,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1085143975, now seen corresponding path program 12 times [2023-11-06 23:04:48,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:48,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296659352] [2023-11-06 23:04:48,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:48,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:48,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:49,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:49,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:49,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296659352] [2023-11-06 23:04:49,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296659352] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:49,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105486801] [2023-11-06 23:04:49,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:04:49,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:49,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:49,612 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:49,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 23:04:49,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 23:04:49,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:04:49,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-06 23:04:49,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:50,190 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:50,191 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 15 treesize of output 14 [2023-11-06 23:04:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:50,241 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:50,448 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:50,449 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-11-06 23:04:50,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:50,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105486801] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:50,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:50,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-11-06 23:04:50,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409344767] [2023-11-06 23:04:50,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:50,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-06 23:04:50,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:50,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-06 23:04:50,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 23:04:53,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 226 [2023-11-06 23:04:53,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 70 transitions, 783 flow. Second operand has 33 states, 33 states have (on average 73.6969696969697) internal successors, (2432), 33 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:53,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:53,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 226 [2023-11-06 23:04:53,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:54,963 INFO L124 PetriNetUnfolderBase]: 347/608 cut-off events. [2023-11-06 23:04:54,963 INFO L125 PetriNetUnfolderBase]: For 4761/4761 co-relation queries the response was YES. [2023-11-06 23:04:54,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3817 conditions, 608 events. 347/608 cut-off events. For 4761/4761 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2395 event pairs, 30 based on Foata normal form. 4/612 useless extension candidates. Maximal degree in co-relation 3692. Up to 368 conditions per place. [2023-11-06 23:04:54,976 INFO L140 encePairwiseOnDemand]: 215/226 looper letters, 123 selfloop transitions, 69 changer transitions 13/205 dead transitions. [2023-11-06 23:04:54,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 205 transitions, 2309 flow [2023-11-06 23:04:54,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 23:04:54,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-06 23:04:54,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2169 transitions. [2023-11-06 23:04:54,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34276232616940583 [2023-11-06 23:04:54,984 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2169 transitions. [2023-11-06 23:04:54,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2169 transitions. [2023-11-06 23:04:54,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:54,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2169 transitions. [2023-11-06 23:04:54,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 77.46428571428571) internal successors, (2169), 28 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:55,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 226.0) internal successors, (6554), 29 states have internal predecessors, (6554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:55,004 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 226.0) internal successors, (6554), 29 states have internal predecessors, (6554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:55,004 INFO L175 Difference]: Start difference. First operand has 86 places, 70 transitions, 783 flow. Second operand 28 states and 2169 transitions. [2023-11-06 23:04:55,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 205 transitions, 2309 flow [2023-11-06 23:04:55,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 205 transitions, 2092 flow, removed 79 selfloop flow, removed 7 redundant places. [2023-11-06 23:04:55,036 INFO L231 Difference]: Finished difference. Result has 121 places, 132 transitions, 1750 flow [2023-11-06 23:04:55,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1750, PETRI_PLACES=121, PETRI_TRANSITIONS=132} [2023-11-06 23:04:55,037 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 100 predicate places. [2023-11-06 23:04:55,038 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 132 transitions, 1750 flow [2023-11-06 23:04:55,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 73.6969696969697) internal successors, (2432), 33 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:55,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:55,039 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:55,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:55,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 23:04:55,245 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:04:55,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:55,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1414750811, now seen corresponding path program 13 times [2023-11-06 23:04:55,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:55,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536603065] [2023-11-06 23:04:55,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:55,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:56,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:56,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:56,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536603065] [2023-11-06 23:04:56,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536603065] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:56,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863627049] [2023-11-06 23:04:56,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:04:56,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:56,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:56,244 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:56,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 23:04:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:56,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 23:04:56,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:56,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:56,832 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:56,833 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-06 23:04:56,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:04:56,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863627049] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:56,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:56,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-11-06 23:04:56,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051487596] [2023-11-06 23:04:56,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:56,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 23:04:56,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:56,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 23:04:56,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2023-11-06 23:04:58,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 226 [2023-11-06 23:04:58,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 132 transitions, 1750 flow. Second operand has 26 states, 26 states have (on average 76.96153846153847) internal successors, (2001), 26 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:58,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:58,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 226 [2023-11-06 23:04:58,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:59,443 INFO L124 PetriNetUnfolderBase]: 402/697 cut-off events. [2023-11-06 23:04:59,443 INFO L125 PetriNetUnfolderBase]: For 6537/6537 co-relation queries the response was YES. [2023-11-06 23:04:59,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4796 conditions, 697 events. 402/697 cut-off events. For 6537/6537 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2817 event pairs, 64 based on Foata normal form. 1/698 useless extension candidates. Maximal degree in co-relation 4656. Up to 556 conditions per place. [2023-11-06 23:04:59,458 INFO L140 encePairwiseOnDemand]: 215/226 looper letters, 124 selfloop transitions, 61 changer transitions 1/186 dead transitions. [2023-11-06 23:04:59,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 186 transitions, 2563 flow [2023-11-06 23:04:59,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 23:04:59,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 23:04:59,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1594 transitions. [2023-11-06 23:04:59,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3526548672566372 [2023-11-06 23:04:59,466 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1594 transitions. [2023-11-06 23:04:59,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1594 transitions. [2023-11-06 23:04:59,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:59,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1594 transitions. [2023-11-06 23:04:59,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 79.7) internal successors, (1594), 20 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:59,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 226.0) internal successors, (4746), 21 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:59,478 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 226.0) internal successors, (4746), 21 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:59,478 INFO L175 Difference]: Start difference. First operand has 121 places, 132 transitions, 1750 flow. Second operand 20 states and 1594 transitions. [2023-11-06 23:04:59,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 186 transitions, 2563 flow [2023-11-06 23:04:59,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 186 transitions, 2177 flow, removed 191 selfloop flow, removed 2 redundant places. [2023-11-06 23:04:59,523 INFO L231 Difference]: Finished difference. Result has 145 places, 152 transitions, 1887 flow [2023-11-06 23:04:59,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1887, PETRI_PLACES=145, PETRI_TRANSITIONS=152} [2023-11-06 23:04:59,524 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 124 predicate places. [2023-11-06 23:04:59,524 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 152 transitions, 1887 flow [2023-11-06 23:04:59,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 76.96153846153847) internal successors, (2001), 26 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:59,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:59,525 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:59,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:59,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 23:04:59,732 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:04:59,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:59,732 INFO L85 PathProgramCache]: Analyzing trace with hash 411130763, now seen corresponding path program 14 times [2023-11-06 23:04:59,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:59,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755136384] [2023-11-06 23:04:59,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:59,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:00,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:00,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755136384] [2023-11-06 23:05:00,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755136384] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:00,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508347925] [2023-11-06 23:05:00,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:05:00,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:00,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:00,457 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:00,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 23:05:00,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:05:00,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:05:00,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 23:05:00,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:00,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:05:00,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:00,890 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:05:00,890 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-06 23:05:00,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:05:00,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508347925] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:00,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:05:00,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 18 [2023-11-06 23:05:00,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47717757] [2023-11-06 23:05:00,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:00,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 23:05:01,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:01,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 23:05:01,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-11-06 23:05:01,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 226 [2023-11-06 23:05:01,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 152 transitions, 1887 flow. Second operand has 20 states, 20 states have (on average 83.05) internal successors, (1661), 20 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:01,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:01,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 226 [2023-11-06 23:05:01,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:02,699 INFO L124 PetriNetUnfolderBase]: 450/779 cut-off events. [2023-11-06 23:05:02,699 INFO L125 PetriNetUnfolderBase]: For 8643/8643 co-relation queries the response was YES. [2023-11-06 23:05:02,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5267 conditions, 779 events. 450/779 cut-off events. For 8643/8643 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3234 event pairs, 60 based on Foata normal form. 2/781 useless extension candidates. Maximal degree in co-relation 5142. Up to 621 conditions per place. [2023-11-06 23:05:02,719 INFO L140 encePairwiseOnDemand]: 215/226 looper letters, 123 selfloop transitions, 65 changer transitions 2/190 dead transitions. [2023-11-06 23:05:02,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 190 transitions, 2632 flow [2023-11-06 23:05:02,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 23:05:02,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 23:05:02,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1459 transitions. [2023-11-06 23:05:02,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797501301405518 [2023-11-06 23:05:02,724 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1459 transitions. [2023-11-06 23:05:02,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1459 transitions. [2023-11-06 23:05:02,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:02,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1459 transitions. [2023-11-06 23:05:02,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 85.82352941176471) internal successors, (1459), 17 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:02,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 226.0) internal successors, (4068), 18 states have internal predecessors, (4068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:02,735 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 226.0) internal successors, (4068), 18 states have internal predecessors, (4068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:02,736 INFO L175 Difference]: Start difference. First operand has 145 places, 152 transitions, 1887 flow. Second operand 17 states and 1459 transitions. [2023-11-06 23:05:02,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 190 transitions, 2632 flow [2023-11-06 23:05:02,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 190 transitions, 2376 flow, removed 106 selfloop flow, removed 10 redundant places. [2023-11-06 23:05:02,789 INFO L231 Difference]: Finished difference. Result has 155 places, 161 transitions, 2010 flow [2023-11-06 23:05:02,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=1631, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2010, PETRI_PLACES=155, PETRI_TRANSITIONS=161} [2023-11-06 23:05:02,790 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 134 predicate places. [2023-11-06 23:05:02,790 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 161 transitions, 2010 flow [2023-11-06 23:05:02,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 83.05) internal successors, (1661), 20 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:02,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:02,791 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:02,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:02,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:02,999 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:05:02,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:02,999 INFO L85 PathProgramCache]: Analyzing trace with hash 301153797, now seen corresponding path program 15 times [2023-11-06 23:05:03,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:03,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303503250] [2023-11-06 23:05:03,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:03,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:03,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:03,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303503250] [2023-11-06 23:05:03,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303503250] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:03,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084290118] [2023-11-06 23:05:03,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:05:03,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:03,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:03,897 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:03,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 23:05:04,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 23:05:04,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:05:04,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 23:05:04,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:05:04,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:04,300 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:05:04,301 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-11-06 23:05:04,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:05:04,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084290118] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:04,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:05:04,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 18 [2023-11-06 23:05:04,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458226556] [2023-11-06 23:05:04,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:04,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 23:05:04,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:04,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 23:05:04,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-11-06 23:05:05,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 226 [2023-11-06 23:05:05,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 161 transitions, 2010 flow. Second operand has 20 states, 20 states have (on average 83.15) internal successors, (1663), 20 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:05,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:05,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 226 [2023-11-06 23:05:05,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:06,030 INFO L124 PetriNetUnfolderBase]: 533/920 cut-off events. [2023-11-06 23:05:06,031 INFO L125 PetriNetUnfolderBase]: For 11617/11617 co-relation queries the response was YES. [2023-11-06 23:05:06,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6432 conditions, 920 events. 533/920 cut-off events. For 11617/11617 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4040 event pairs, 74 based on Foata normal form. 2/922 useless extension candidates. Maximal degree in co-relation 6300. Up to 752 conditions per place. [2023-11-06 23:05:06,055 INFO L140 encePairwiseOnDemand]: 216/226 looper letters, 172 selfloop transitions, 48 changer transitions 2/222 dead transitions. [2023-11-06 23:05:06,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 222 transitions, 3100 flow [2023-11-06 23:05:06,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 23:05:06,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 23:05:06,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1549 transitions. [2023-11-06 23:05:06,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38077679449360863 [2023-11-06 23:05:06,063 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1549 transitions. [2023-11-06 23:05:06,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1549 transitions. [2023-11-06 23:05:06,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:06,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1549 transitions. [2023-11-06 23:05:06,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 86.05555555555556) internal successors, (1549), 18 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:06,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 226.0) internal successors, (4294), 19 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:06,076 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 226.0) internal successors, (4294), 19 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:06,076 INFO L175 Difference]: Start difference. First operand has 155 places, 161 transitions, 2010 flow. Second operand 18 states and 1549 transitions. [2023-11-06 23:05:06,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 222 transitions, 3100 flow [2023-11-06 23:05:06,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 222 transitions, 2869 flow, removed 78 selfloop flow, removed 11 redundant places. [2023-11-06 23:05:06,134 INFO L231 Difference]: Finished difference. Result has 166 places, 180 transitions, 2327 flow [2023-11-06 23:05:06,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=1779, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2327, PETRI_PLACES=166, PETRI_TRANSITIONS=180} [2023-11-06 23:05:06,135 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 145 predicate places. [2023-11-06 23:05:06,135 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 180 transitions, 2327 flow [2023-11-06 23:05:06,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 83.15) internal successors, (1663), 20 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:06,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:06,136 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:06,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:06,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:06,342 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:05:06,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:06,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1543733037, now seen corresponding path program 16 times [2023-11-06 23:05:06,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:06,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836238042] [2023-11-06 23:05:06,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:06,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:06,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:07,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:07,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836238042] [2023-11-06 23:05:07,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836238042] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:07,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902912736] [2023-11-06 23:05:07,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:05:07,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:07,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:07,306 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:07,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 23:05:07,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:05:07,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:05:07,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 23:05:07,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:05:07,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:07,882 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:05:07,883 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-11-06 23:05:08,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:05:08,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902912736] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:08,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:05:08,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 24 [2023-11-06 23:05:08,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20059350] [2023-11-06 23:05:08,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:08,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 23:05:08,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:08,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 23:05:08,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2023-11-06 23:05:09,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 226 [2023-11-06 23:05:09,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 180 transitions, 2327 flow. Second operand has 26 states, 26 states have (on average 74.88461538461539) internal successors, (1947), 26 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:09,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:09,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 226 [2023-11-06 23:05:09,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:10,659 INFO L124 PetriNetUnfolderBase]: 620/1068 cut-off events. [2023-11-06 23:05:10,659 INFO L125 PetriNetUnfolderBase]: For 16300/16300 co-relation queries the response was YES. [2023-11-06 23:05:10,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7876 conditions, 1068 events. 620/1068 cut-off events. For 16300/16300 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4879 event pairs, 96 based on Foata normal form. 3/1071 useless extension candidates. Maximal degree in co-relation 7734. Up to 878 conditions per place. [2023-11-06 23:05:10,680 INFO L140 encePairwiseOnDemand]: 216/226 looper letters, 174 selfloop transitions, 66 changer transitions 3/243 dead transitions. [2023-11-06 23:05:10,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 243 transitions, 3615 flow [2023-11-06 23:05:10,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 23:05:10,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 23:05:10,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1781 transitions. [2023-11-06 23:05:10,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34263178145440554 [2023-11-06 23:05:10,686 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1781 transitions. [2023-11-06 23:05:10,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1781 transitions. [2023-11-06 23:05:10,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:10,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1781 transitions. [2023-11-06 23:05:10,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 77.43478260869566) internal successors, (1781), 23 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:10,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 226.0) internal successors, (5424), 24 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:10,700 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 226.0) internal successors, (5424), 24 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:10,700 INFO L175 Difference]: Start difference. First operand has 166 places, 180 transitions, 2327 flow. Second operand 23 states and 1781 transitions. [2023-11-06 23:05:10,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 243 transitions, 3615 flow [2023-11-06 23:05:10,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 243 transitions, 3264 flow, removed 154 selfloop flow, removed 8 redundant places. [2023-11-06 23:05:10,758 INFO L231 Difference]: Finished difference. Result has 187 places, 202 transitions, 2730 flow [2023-11-06 23:05:10,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=1976, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2730, PETRI_PLACES=187, PETRI_TRANSITIONS=202} [2023-11-06 23:05:10,759 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 166 predicate places. [2023-11-06 23:05:10,759 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 202 transitions, 2730 flow [2023-11-06 23:05:10,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 74.88461538461539) internal successors, (1947), 26 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:10,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:10,760 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:10,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:10,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-06 23:05:10,961 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:05:10,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:10,961 INFO L85 PathProgramCache]: Analyzing trace with hash 2128871533, now seen corresponding path program 17 times [2023-11-06 23:05:10,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:10,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204416390] [2023-11-06 23:05:10,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:10,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:11,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:11,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:11,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204416390] [2023-11-06 23:05:11,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204416390] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:11,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995559147] [2023-11-06 23:05:11,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:05:11,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:11,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:11,971 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:11,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 23:05:12,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 23:05:12,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:05:12,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-06 23:05:12,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:12,242 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 23:05:12,303 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:12,358 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:12,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:12,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:12,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:05:12,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995559147] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:12,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:05:12,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 6] total 26 [2023-11-06 23:05:12,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441772520] [2023-11-06 23:05:12,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:12,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 23:05:12,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:12,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 23:05:12,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2023-11-06 23:05:15,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 226 [2023-11-06 23:05:15,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 202 transitions, 2730 flow. Second operand has 28 states, 28 states have (on average 76.75) internal successors, (2149), 28 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:15,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:15,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 226 [2023-11-06 23:05:15,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:16,328 INFO L124 PetriNetUnfolderBase]: 675/1159 cut-off events. [2023-11-06 23:05:16,328 INFO L125 PetriNetUnfolderBase]: For 20926/20926 co-relation queries the response was YES. [2023-11-06 23:05:16,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8753 conditions, 1159 events. 675/1159 cut-off events. For 20926/20926 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5391 event pairs, 116 based on Foata normal form. 2/1161 useless extension candidates. Maximal degree in co-relation 8596. Up to 1030 conditions per place. [2023-11-06 23:05:16,442 INFO L140 encePairwiseOnDemand]: 216/226 looper letters, 199 selfloop transitions, 50 changer transitions 2/251 dead transitions. [2023-11-06 23:05:16,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 251 transitions, 3775 flow [2023-11-06 23:05:16,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 23:05:16,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 23:05:16,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1672 transitions. [2023-11-06 23:05:16,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3522966708807417 [2023-11-06 23:05:16,450 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1672 transitions. [2023-11-06 23:05:16,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1672 transitions. [2023-11-06 23:05:16,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:16,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1672 transitions. [2023-11-06 23:05:16,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 79.61904761904762) internal successors, (1672), 21 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:16,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 226.0) internal successors, (4972), 22 states have internal predecessors, (4972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:16,464 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 226.0) internal successors, (4972), 22 states have internal predecessors, (4972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:16,465 INFO L175 Difference]: Start difference. First operand has 187 places, 202 transitions, 2730 flow. Second operand 21 states and 1672 transitions. [2023-11-06 23:05:16,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 251 transitions, 3775 flow [2023-11-06 23:05:16,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 251 transitions, 3261 flow, removed 211 selfloop flow, removed 13 redundant places. [2023-11-06 23:05:16,555 INFO L231 Difference]: Finished difference. Result has 199 places, 215 transitions, 2691 flow [2023-11-06 23:05:16,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=2216, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2691, PETRI_PLACES=199, PETRI_TRANSITIONS=215} [2023-11-06 23:05:16,555 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 178 predicate places. [2023-11-06 23:05:16,556 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 215 transitions, 2691 flow [2023-11-06 23:05:16,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 76.75) internal successors, (2149), 28 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:16,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:16,557 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:16,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:16,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 23:05:16,764 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:05:16,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:16,764 INFO L85 PathProgramCache]: Analyzing trace with hash -133973579, now seen corresponding path program 18 times [2023-11-06 23:05:16,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:16,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987664396] [2023-11-06 23:05:16,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:16,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:17,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:17,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:17,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987664396] [2023-11-06 23:05:17,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987664396] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:17,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604886435] [2023-11-06 23:05:17,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:05:17,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:17,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:17,465 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:17,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 23:05:17,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 23:05:17,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:05:17,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-06 23:05:17,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:17,792 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 23:05:17,853 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:17,911 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:18,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:18,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:24,057 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:05:24,057 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 55 treesize of output 44 [2023-11-06 23:05:24,072 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:05:24,073 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 94 treesize of output 88 [2023-11-06 23:05:24,087 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:05:24,088 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 80 treesize of output 68 [2023-11-06 23:05:24,109 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:05:24,109 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 34 treesize of output 33 [2023-11-06 23:05:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:24,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604886435] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:24,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:05:24,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-11-06 23:05:24,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796746107] [2023-11-06 23:05:24,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:24,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-06 23:05:24,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:24,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-06 23:05:24,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=896, Unknown=4, NotChecked=0, Total=1056 [2023-11-06 23:05:26,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:05:28,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:05:32,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:05:32,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 226 [2023-11-06 23:05:32,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 215 transitions, 2691 flow. Second operand has 33 states, 33 states have (on average 58.484848484848484) internal successors, (1930), 33 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:32,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:32,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 226 [2023-11-06 23:05:32,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:35,413 INFO L124 PetriNetUnfolderBase]: 882/1478 cut-off events. [2023-11-06 23:05:35,413 INFO L125 PetriNetUnfolderBase]: For 29741/29741 co-relation queries the response was YES. [2023-11-06 23:05:35,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11560 conditions, 1478 events. 882/1478 cut-off events. For 29741/29741 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 7108 event pairs, 101 based on Foata normal form. 2/1480 useless extension candidates. Maximal degree in co-relation 11393. Up to 1120 conditions per place. [2023-11-06 23:05:35,436 INFO L140 encePairwiseOnDemand]: 214/226 looper letters, 208 selfloop transitions, 128 changer transitions 11/347 dead transitions. [2023-11-06 23:05:35,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 347 transitions, 5128 flow [2023-11-06 23:05:35,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 23:05:35,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-06 23:05:35,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1980 transitions. [2023-11-06 23:05:35,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.273783185840708 [2023-11-06 23:05:35,461 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1980 transitions. [2023-11-06 23:05:35,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1980 transitions. [2023-11-06 23:05:35,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:35,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1980 transitions. [2023-11-06 23:05:35,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 61.875) internal successors, (1980), 32 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:35,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 226.0) internal successors, (7458), 33 states have internal predecessors, (7458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:35,483 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 226.0) internal successors, (7458), 33 states have internal predecessors, (7458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:35,483 INFO L175 Difference]: Start difference. First operand has 199 places, 215 transitions, 2691 flow. Second operand 32 states and 1980 transitions. [2023-11-06 23:05:35,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 347 transitions, 5128 flow [2023-11-06 23:05:35,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 347 transitions, 4821 flow, removed 128 selfloop flow, removed 13 redundant places. [2023-11-06 23:05:35,607 INFO L231 Difference]: Finished difference. Result has 223 places, 289 transitions, 4280 flow [2023-11-06 23:05:35,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=2386, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=4280, PETRI_PLACES=223, PETRI_TRANSITIONS=289} [2023-11-06 23:05:35,609 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 202 predicate places. [2023-11-06 23:05:35,609 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 289 transitions, 4280 flow [2023-11-06 23:05:35,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 58.484848484848484) internal successors, (1930), 33 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:35,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:35,610 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:35,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:35,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-06 23:05:35,814 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:05:35,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:35,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1894289655, now seen corresponding path program 19 times [2023-11-06 23:05:35,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:35,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084747963] [2023-11-06 23:05:35,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:35,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:36,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:36,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:36,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084747963] [2023-11-06 23:05:36,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084747963] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:36,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362969229] [2023-11-06 23:05:36,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:05:36,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:36,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:36,639 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:36,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 23:05:36,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:36,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-06 23:05:36,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:36,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:36,979 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 23:05:37,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:05:37,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:37,350 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_593 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_593) c_~A~0.base))) (= (+ (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset 4))) (+ (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) c_~counter~0)))) is different from false [2023-11-06 23:05:37,391 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:05:37,392 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 73 [2023-11-06 23:05:37,414 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:05:37,415 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2023-11-06 23:05:37,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:05:37,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362969229] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:37,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:05:37,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2023-11-06 23:05:37,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102472385] [2023-11-06 23:05:37,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:37,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 23:05:37,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:37,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 23:05:37,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=666, Unknown=1, NotChecked=52, Total=812 [2023-11-06 23:05:37,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 226 [2023-11-06 23:05:37,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 289 transitions, 4280 flow. Second operand has 29 states, 29 states have (on average 61.689655172413794) internal successors, (1789), 29 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:37,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:37,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 226 [2023-11-06 23:05:37,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:39,300 INFO L124 PetriNetUnfolderBase]: 922/1547 cut-off events. [2023-11-06 23:05:39,300 INFO L125 PetriNetUnfolderBase]: For 34298/34298 co-relation queries the response was YES. [2023-11-06 23:05:39,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12847 conditions, 1547 events. 922/1547 cut-off events. For 34298/34298 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7505 event pairs, 103 based on Foata normal form. 2/1549 useless extension candidates. Maximal degree in co-relation 12669. Up to 1305 conditions per place. [2023-11-06 23:05:39,328 INFO L140 encePairwiseOnDemand]: 216/226 looper letters, 247 selfloop transitions, 94 changer transitions 2/343 dead transitions. [2023-11-06 23:05:39,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 343 transitions, 5746 flow [2023-11-06 23:05:39,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 23:05:39,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 23:05:39,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1423 transitions. [2023-11-06 23:05:39,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28620273531777957 [2023-11-06 23:05:39,332 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1423 transitions. [2023-11-06 23:05:39,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1423 transitions. [2023-11-06 23:05:39,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:39,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1423 transitions. [2023-11-06 23:05:39,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 64.68181818181819) internal successors, (1423), 22 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:39,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 226.0) internal successors, (5198), 23 states have internal predecessors, (5198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:39,342 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 226.0) internal successors, (5198), 23 states have internal predecessors, (5198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:39,342 INFO L175 Difference]: Start difference. First operand has 223 places, 289 transitions, 4280 flow. Second operand 22 states and 1423 transitions. [2023-11-06 23:05:39,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 343 transitions, 5746 flow [2023-11-06 23:05:39,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 343 transitions, 4497 flow, removed 588 selfloop flow, removed 17 redundant places. [2023-11-06 23:05:39,572 INFO L231 Difference]: Finished difference. Result has 233 places, 305 transitions, 3827 flow [2023-11-06 23:05:39,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=3065, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3827, PETRI_PLACES=233, PETRI_TRANSITIONS=305} [2023-11-06 23:05:39,573 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 212 predicate places. [2023-11-06 23:05:39,573 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 305 transitions, 3827 flow [2023-11-06 23:05:39,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 61.689655172413794) internal successors, (1789), 29 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:39,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:39,573 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:39,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:39,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 23:05:39,774 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:05:39,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:39,774 INFO L85 PathProgramCache]: Analyzing trace with hash 66571919, now seen corresponding path program 20 times [2023-11-06 23:05:39,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:39,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892115053] [2023-11-06 23:05:39,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:39,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:39,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:40,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:40,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:40,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892115053] [2023-11-06 23:05:40,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892115053] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:40,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981493856] [2023-11-06 23:05:40,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:05:40,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:40,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:40,523 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:40,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 23:05:40,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:05:40,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:05:40,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-06 23:05:40,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:40,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:40,839 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 23:05:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:05:40,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:41,127 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_622 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_622) c_~A~0.base))) (= (+ (select .cse0 (+ c_~A~0.offset 4)) (select .cse0 c_~A~0.offset)) (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))))) is different from false [2023-11-06 23:05:41,163 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:05:41,163 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 73 [2023-11-06 23:05:41,184 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:05:41,185 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2023-11-06 23:05:41,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:05:41,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981493856] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:41,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:05:41,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 26 [2023-11-06 23:05:41,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928639527] [2023-11-06 23:05:41,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:41,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 23:05:41,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:41,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 23:05:41,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=607, Unknown=1, NotChecked=50, Total=756 [2023-11-06 23:05:41,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 226 [2023-11-06 23:05:41,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 305 transitions, 3827 flow. Second operand has 28 states, 28 states have (on average 61.75) internal successors, (1729), 28 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:41,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:41,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 226 [2023-11-06 23:05:41,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:42,395 INFO L124 PetriNetUnfolderBase]: 954/1604 cut-off events. [2023-11-06 23:05:42,395 INFO L125 PetriNetUnfolderBase]: For 33471/33471 co-relation queries the response was YES. [2023-11-06 23:05:42,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12173 conditions, 1604 events. 954/1604 cut-off events. For 33471/33471 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7941 event pairs, 106 based on Foata normal form. 1/1603 useless extension candidates. Maximal degree in co-relation 11985. Up to 1414 conditions per place. [2023-11-06 23:05:42,422 INFO L140 encePairwiseOnDemand]: 218/226 looper letters, 274 selfloop transitions, 66 changer transitions 1/341 dead transitions. [2023-11-06 23:05:42,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 341 transitions, 4899 flow [2023-11-06 23:05:42,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 23:05:42,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 23:05:42,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 977 transitions. [2023-11-06 23:05:42,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28820058997050146 [2023-11-06 23:05:42,426 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 977 transitions. [2023-11-06 23:05:42,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 977 transitions. [2023-11-06 23:05:42,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:42,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 977 transitions. [2023-11-06 23:05:42,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 65.13333333333334) internal successors, (977), 15 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:42,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 226.0) internal successors, (3616), 16 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:42,433 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 226.0) internal successors, (3616), 16 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:42,434 INFO L175 Difference]: Start difference. First operand has 233 places, 305 transitions, 3827 flow. Second operand 15 states and 977 transitions. [2023-11-06 23:05:42,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 341 transitions, 4899 flow [2023-11-06 23:05:42,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 341 transitions, 4409 flow, removed 195 selfloop flow, removed 16 redundant places. [2023-11-06 23:05:42,637 INFO L231 Difference]: Finished difference. Result has 234 places, 311 transitions, 3663 flow [2023-11-06 23:05:42,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=3337, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3663, PETRI_PLACES=234, PETRI_TRANSITIONS=311} [2023-11-06 23:05:42,639 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 213 predicate places. [2023-11-06 23:05:42,639 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 311 transitions, 3663 flow [2023-11-06 23:05:42,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 61.75) internal successors, (1729), 28 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:42,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:42,640 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:42,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:42,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-06 23:05:42,848 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:05:42,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:42,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1492425087, now seen corresponding path program 21 times [2023-11-06 23:05:42,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:42,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188152364] [2023-11-06 23:05:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:42,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:42,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:43,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:43,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:43,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188152364] [2023-11-06 23:05:43,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188152364] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:43,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124893980] [2023-11-06 23:05:43,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:05:43,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:43,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:43,803 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:43,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 23:05:43,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 23:05:43,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:05:43,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-06 23:05:43,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:44,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:44,233 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 23:05:44,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:05:44,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:44,684 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:05:44,685 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 73 [2023-11-06 23:05:44,704 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:05:44,705 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2023-11-06 23:05:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:05:44,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124893980] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:44,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:05:44,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 28 [2023-11-06 23:05:44,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518437710] [2023-11-06 23:05:44,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:44,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 23:05:44,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:44,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 23:05:44,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=758, Unknown=4, NotChecked=0, Total=870 [2023-11-06 23:05:47,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 226 [2023-11-06 23:05:47,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 311 transitions, 3663 flow. Second operand has 30 states, 30 states have (on average 58.56666666666667) internal successors, (1757), 30 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:47,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:47,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 226 [2023-11-06 23:05:47,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:48,914 INFO L124 PetriNetUnfolderBase]: 987/1660 cut-off events. [2023-11-06 23:05:48,914 INFO L125 PetriNetUnfolderBase]: For 34300/34300 co-relation queries the response was YES. [2023-11-06 23:05:48,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12486 conditions, 1660 events. 987/1660 cut-off events. For 34300/34300 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 8282 event pairs, 134 based on Foata normal form. 1/1659 useless extension candidates. Maximal degree in co-relation 12296. Up to 1451 conditions per place. [2023-11-06 23:05:48,942 INFO L140 encePairwiseOnDemand]: 216/226 looper letters, 269 selfloop transitions, 82 changer transitions 1/352 dead transitions. [2023-11-06 23:05:48,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 352 transitions, 4773 flow [2023-11-06 23:05:48,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 23:05:48,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 23:05:48,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1294 transitions. [2023-11-06 23:05:48,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2726506531816266 [2023-11-06 23:05:48,947 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1294 transitions. [2023-11-06 23:05:48,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1294 transitions. [2023-11-06 23:05:48,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:48,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1294 transitions. [2023-11-06 23:05:48,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 61.61904761904762) internal successors, (1294), 21 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:48,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 226.0) internal successors, (4972), 22 states have internal predecessors, (4972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:48,956 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 226.0) internal successors, (4972), 22 states have internal predecessors, (4972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:48,956 INFO L175 Difference]: Start difference. First operand has 234 places, 311 transitions, 3663 flow. Second operand 21 states and 1294 transitions. [2023-11-06 23:05:48,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 352 transitions, 4773 flow [2023-11-06 23:05:49,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 352 transitions, 4582 flow, removed 57 selfloop flow, removed 11 redundant places. [2023-11-06 23:05:49,158 INFO L231 Difference]: Finished difference. Result has 246 places, 317 transitions, 3876 flow [2023-11-06 23:05:49,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=3476, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3876, PETRI_PLACES=246, PETRI_TRANSITIONS=317} [2023-11-06 23:05:49,161 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 225 predicate places. [2023-11-06 23:05:49,161 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 317 transitions, 3876 flow [2023-11-06 23:05:49,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 58.56666666666667) internal successors, (1757), 30 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:49,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:49,162 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:49,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:49,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 23:05:49,369 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:05:49,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:49,370 INFO L85 PathProgramCache]: Analyzing trace with hash 22801157, now seen corresponding path program 22 times [2023-11-06 23:05:49,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:49,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655871685] [2023-11-06 23:05:49,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:49,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:50,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:50,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:50,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655871685] [2023-11-06 23:05:50,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655871685] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:50,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450529236] [2023-11-06 23:05:50,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:05:50,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:50,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:50,354 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:50,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 23:05:50,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:05:50,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:05:50,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 23:05:50,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:05:50,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:50,910 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:05:50,911 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-11-06 23:05:51,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:05:51,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450529236] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:51,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:05:51,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 22 [2023-11-06 23:05:51,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329320296] [2023-11-06 23:05:51,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:51,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 23:05:51,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:51,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 23:05:51,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-11-06 23:05:52,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 226 [2023-11-06 23:05:52,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 317 transitions, 3876 flow. Second operand has 24 states, 24 states have (on average 77.0) internal successors, (1848), 24 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:52,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:52,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 226 [2023-11-06 23:05:52,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:53,953 INFO L124 PetriNetUnfolderBase]: 1057/1780 cut-off events. [2023-11-06 23:05:53,953 INFO L125 PetriNetUnfolderBase]: For 39931/39931 co-relation queries the response was YES. [2023-11-06 23:05:53,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14104 conditions, 1780 events. 1057/1780 cut-off events. For 39931/39931 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9057 event pairs, 176 based on Foata normal form. 2/1780 useless extension candidates. Maximal degree in co-relation 13913. Up to 1612 conditions per place. [2023-11-06 23:05:53,979 INFO L140 encePairwiseOnDemand]: 216/226 looper letters, 328 selfloop transitions, 49 changer transitions 2/379 dead transitions. [2023-11-06 23:05:53,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 379 transitions, 5568 flow [2023-11-06 23:05:53,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 23:05:53,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 23:05:53,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1678 transitions. [2023-11-06 23:05:53,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35356089338390223 [2023-11-06 23:05:53,983 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1678 transitions. [2023-11-06 23:05:53,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1678 transitions. [2023-11-06 23:05:53,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:53,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1678 transitions. [2023-11-06 23:05:53,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 79.9047619047619) internal successors, (1678), 21 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:53,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 226.0) internal successors, (4972), 22 states have internal predecessors, (4972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:53,994 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 226.0) internal successors, (4972), 22 states have internal predecessors, (4972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:53,994 INFO L175 Difference]: Start difference. First operand has 246 places, 317 transitions, 3876 flow. Second operand 21 states and 1678 transitions. [2023-11-06 23:05:53,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 379 transitions, 5568 flow [2023-11-06 23:05:54,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 379 transitions, 5278 flow, removed 91 selfloop flow, removed 16 redundant places. [2023-11-06 23:05:54,171 INFO L231 Difference]: Finished difference. Result has 255 places, 334 transitions, 4301 flow [2023-11-06 23:05:54,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=3592, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4301, PETRI_PLACES=255, PETRI_TRANSITIONS=334} [2023-11-06 23:05:54,173 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 234 predicate places. [2023-11-06 23:05:54,173 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 334 transitions, 4301 flow [2023-11-06 23:05:54,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 77.0) internal successors, (1848), 24 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:54,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:54,174 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:54,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:54,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 23:05:54,375 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:05:54,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:54,375 INFO L85 PathProgramCache]: Analyzing trace with hash 907829979, now seen corresponding path program 23 times [2023-11-06 23:05:54,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:54,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971376398] [2023-11-06 23:05:54,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:54,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:54,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:55,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:55,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971376398] [2023-11-06 23:05:55,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971376398] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:55,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740378428] [2023-11-06 23:05:55,368 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:05:55,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:55,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:55,371 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:55,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 23:05:55,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:05:55,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:05:55,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 23:05:55,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:05:55,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:55,957 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:05:55,957 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-06 23:05:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:05:56,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740378428] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:56,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:05:56,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 24 [2023-11-06 23:05:56,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47462078] [2023-11-06 23:05:56,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:56,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 23:05:56,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:56,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 23:05:56,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2023-11-06 23:05:58,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 226 [2023-11-06 23:05:58,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 334 transitions, 4301 flow. Second operand has 26 states, 26 states have (on average 75.88461538461539) internal successors, (1973), 26 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:58,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:58,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 226 [2023-11-06 23:05:58,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:59,977 INFO L124 PetriNetUnfolderBase]: 1091/1839 cut-off events. [2023-11-06 23:05:59,977 INFO L125 PetriNetUnfolderBase]: For 43440/43440 co-relation queries the response was YES. [2023-11-06 23:05:59,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14660 conditions, 1839 events. 1091/1839 cut-off events. For 43440/43440 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 9444 event pairs, 188 based on Foata normal form. 1/1838 useless extension candidates. Maximal degree in co-relation 14459. Up to 1709 conditions per place. [2023-11-06 23:06:00,008 INFO L140 encePairwiseOnDemand]: 218/226 looper letters, 309 selfloop transitions, 53 changer transitions 1/363 dead transitions. [2023-11-06 23:06:00,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 363 transitions, 5410 flow [2023-11-06 23:06:00,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 23:06:00,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 23:06:00,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1249 transitions. [2023-11-06 23:06:00,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3454092920353982 [2023-11-06 23:06:00,013 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1249 transitions. [2023-11-06 23:06:00,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1249 transitions. [2023-11-06 23:06:00,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:00,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1249 transitions. [2023-11-06 23:06:00,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 78.0625) internal successors, (1249), 16 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:00,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 226.0) internal successors, (3842), 17 states have internal predecessors, (3842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:00,022 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 226.0) internal successors, (3842), 17 states have internal predecessors, (3842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:00,022 INFO L175 Difference]: Start difference. First operand has 255 places, 334 transitions, 4301 flow. Second operand 16 states and 1249 transitions. [2023-11-06 23:06:00,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 363 transitions, 5410 flow [2023-11-06 23:06:00,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 363 transitions, 4939 flow, removed 212 selfloop flow, removed 11 redundant places. [2023-11-06 23:06:00,245 INFO L231 Difference]: Finished difference. Result has 262 places, 342 transitions, 4187 flow [2023-11-06 23:06:00,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=3840, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4187, PETRI_PLACES=262, PETRI_TRANSITIONS=342} [2023-11-06 23:06:00,246 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 241 predicate places. [2023-11-06 23:06:00,246 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 342 transitions, 4187 flow [2023-11-06 23:06:00,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 75.88461538461539) internal successors, (1973), 26 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:00,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:00,247 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:00,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-06 23:06:00,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 23:06:00,455 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:00,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:00,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1840409911, now seen corresponding path program 24 times [2023-11-06 23:06:00,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:00,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701120919] [2023-11-06 23:06:00,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:00,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:01,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:01,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701120919] [2023-11-06 23:06:01,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701120919] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:01,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434646510] [2023-11-06 23:06:01,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:06:01,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:01,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:01,453 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:01,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 23:06:01,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 23:06:01,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:01,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 23:06:01,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:01,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:06:01,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:02,070 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:06:02,070 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-11-06 23:06:02,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:06:02,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434646510] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:02,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:02,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 23 [2023-11-06 23:06:02,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879480422] [2023-11-06 23:06:02,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:02,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 23:06:02,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:02,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 23:06:02,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:06:03,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 226 [2023-11-06 23:06:03,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 342 transitions, 4187 flow. Second operand has 25 states, 25 states have (on average 76.92) internal successors, (1923), 25 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:03,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:03,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 226 [2023-11-06 23:06:03,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:05,219 INFO L124 PetriNetUnfolderBase]: 1146/1930 cut-off events. [2023-11-06 23:06:05,219 INFO L125 PetriNetUnfolderBase]: For 46079/46079 co-relation queries the response was YES. [2023-11-06 23:06:05,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15315 conditions, 1930 events. 1146/1930 cut-off events. For 46079/46079 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10032 event pairs, 198 based on Foata normal form. 2/1930 useless extension candidates. Maximal degree in co-relation 15109. Up to 1801 conditions per place. [2023-11-06 23:06:05,249 INFO L140 encePairwiseOnDemand]: 216/226 looper letters, 334 selfloop transitions, 50 changer transitions 2/386 dead transitions. [2023-11-06 23:06:05,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 386 transitions, 5688 flow [2023-11-06 23:06:05,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 23:06:05,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 23:06:05,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1591 transitions. [2023-11-06 23:06:05,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35199115044247786 [2023-11-06 23:06:05,254 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1591 transitions. [2023-11-06 23:06:05,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1591 transitions. [2023-11-06 23:06:05,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:05,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1591 transitions. [2023-11-06 23:06:05,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 79.55) internal successors, (1591), 20 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:05,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 226.0) internal successors, (4746), 21 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:05,264 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 226.0) internal successors, (4746), 21 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:05,264 INFO L175 Difference]: Start difference. First operand has 262 places, 342 transitions, 4187 flow. Second operand 20 states and 1591 transitions. [2023-11-06 23:06:05,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 386 transitions, 5688 flow [2023-11-06 23:06:05,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 386 transitions, 5438 flow, removed 90 selfloop flow, removed 11 redundant places. [2023-11-06 23:06:05,456 INFO L231 Difference]: Finished difference. Result has 275 places, 355 transitions, 4574 flow [2023-11-06 23:06:05,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=3937, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4574, PETRI_PLACES=275, PETRI_TRANSITIONS=355} [2023-11-06 23:06:05,458 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 254 predicate places. [2023-11-06 23:06:05,458 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 355 transitions, 4574 flow [2023-11-06 23:06:05,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 76.92) internal successors, (1923), 25 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:05,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:05,459 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:05,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:05,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 23:06:05,665 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:05,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:05,666 INFO L85 PathProgramCache]: Analyzing trace with hash 753857499, now seen corresponding path program 25 times [2023-11-06 23:06:05,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:05,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590539953] [2023-11-06 23:06:05,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:05,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:05,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:06,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:06,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590539953] [2023-11-06 23:06:06,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590539953] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:06,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874543963] [2023-11-06 23:06:06,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:06:06,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:06,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:06,367 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:06,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 23:06:06,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:06,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 23:06:06,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:06,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:06:06,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:06,957 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:06:06,957 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-06 23:06:07,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:06:07,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874543963] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:07,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:07,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-11-06 23:06:07,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641032437] [2023-11-06 23:06:07,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:07,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 23:06:07,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:07,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 23:06:07,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2023-11-06 23:06:08,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 226 [2023-11-06 23:06:08,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 355 transitions, 4574 flow. Second operand has 26 states, 26 states have (on average 79.96153846153847) internal successors, (2079), 26 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:08,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:08,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 226 [2023-11-06 23:06:08,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:09,658 INFO L124 PetriNetUnfolderBase]: 1228/2066 cut-off events. [2023-11-06 23:06:09,658 INFO L125 PetriNetUnfolderBase]: For 60136/60136 co-relation queries the response was YES. [2023-11-06 23:06:09,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17571 conditions, 2066 events. 1228/2066 cut-off events. For 60136/60136 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 10815 event pairs, 198 based on Foata normal form. 2/2066 useless extension candidates. Maximal degree in co-relation 17354. Up to 1894 conditions per place. [2023-11-06 23:06:09,693 INFO L140 encePairwiseOnDemand]: 214/226 looper letters, 340 selfloop transitions, 75 changer transitions 2/417 dead transitions. [2023-11-06 23:06:09,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 417 transitions, 6530 flow [2023-11-06 23:06:09,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 23:06:09,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 23:06:09,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1658 transitions. [2023-11-06 23:06:09,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3668141592920354 [2023-11-06 23:06:09,700 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1658 transitions. [2023-11-06 23:06:09,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1658 transitions. [2023-11-06 23:06:09,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:09,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1658 transitions. [2023-11-06 23:06:09,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 82.9) internal successors, (1658), 20 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:09,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 226.0) internal successors, (4746), 21 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:09,710 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 226.0) internal successors, (4746), 21 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:09,710 INFO L175 Difference]: Start difference. First operand has 275 places, 355 transitions, 4574 flow. Second operand 20 states and 1658 transitions. [2023-11-06 23:06:09,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 417 transitions, 6530 flow [2023-11-06 23:06:09,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 417 transitions, 6131 flow, removed 173 selfloop flow, removed 13 redundant places. [2023-11-06 23:06:09,983 INFO L231 Difference]: Finished difference. Result has 288 places, 386 transitions, 5297 flow [2023-11-06 23:06:09,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=4179, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5297, PETRI_PLACES=288, PETRI_TRANSITIONS=386} [2023-11-06 23:06:09,984 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 267 predicate places. [2023-11-06 23:06:09,984 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 386 transitions, 5297 flow [2023-11-06 23:06:09,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 79.96153846153847) internal successors, (2079), 26 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:09,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:09,985 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:09,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:10,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:10,185 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:10,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:10,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1968106255, now seen corresponding path program 26 times [2023-11-06 23:06:10,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:10,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97231829] [2023-11-06 23:06:10,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:10,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:11,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:11,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:11,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97231829] [2023-11-06 23:06:11,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97231829] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:11,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556923765] [2023-11-06 23:06:11,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:06:11,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:11,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:11,040 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:11,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 23:06:11,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:06:11,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:11,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 23:06:11,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:06:11,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:11,607 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:06:11,607 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-06 23:06:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:06:11,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556923765] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:11,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:11,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 24 [2023-11-06 23:06:11,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105890660] [2023-11-06 23:06:11,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:11,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 23:06:11,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:11,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 23:06:11,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2023-11-06 23:06:13,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 226 [2023-11-06 23:06:13,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 386 transitions, 5297 flow. Second operand has 26 states, 26 states have (on average 74.8076923076923) internal successors, (1945), 26 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:13,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:13,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 226 [2023-11-06 23:06:13,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:15,188 INFO L124 PetriNetUnfolderBase]: 1289/2169 cut-off events. [2023-11-06 23:06:15,188 INFO L125 PetriNetUnfolderBase]: For 72266/72266 co-relation queries the response was YES. [2023-11-06 23:06:15,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19299 conditions, 2169 events. 1289/2169 cut-off events. For 72266/72266 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 11524 event pairs, 216 based on Foata normal form. 2/2169 useless extension candidates. Maximal degree in co-relation 19070. Up to 1925 conditions per place. [2023-11-06 23:06:15,226 INFO L140 encePairwiseOnDemand]: 216/226 looper letters, 335 selfloop transitions, 101 changer transitions 4/440 dead transitions. [2023-11-06 23:06:15,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 440 transitions, 7308 flow [2023-11-06 23:06:15,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 23:06:15,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 23:06:15,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1625 transitions. [2023-11-06 23:06:15,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.342393594605984 [2023-11-06 23:06:15,229 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1625 transitions. [2023-11-06 23:06:15,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1625 transitions. [2023-11-06 23:06:15,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:15,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1625 transitions. [2023-11-06 23:06:15,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 77.38095238095238) internal successors, (1625), 21 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:15,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 226.0) internal successors, (4972), 22 states have internal predecessors, (4972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:15,238 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 226.0) internal successors, (4972), 22 states have internal predecessors, (4972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:15,238 INFO L175 Difference]: Start difference. First operand has 288 places, 386 transitions, 5297 flow. Second operand 21 states and 1625 transitions. [2023-11-06 23:06:15,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 440 transitions, 7308 flow [2023-11-06 23:06:15,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 440 transitions, 6681 flow, removed 279 selfloop flow, removed 10 redundant places. [2023-11-06 23:06:15,659 INFO L231 Difference]: Finished difference. Result has 304 places, 407 transitions, 5780 flow [2023-11-06 23:06:15,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=4694, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5780, PETRI_PLACES=304, PETRI_TRANSITIONS=407} [2023-11-06 23:06:15,660 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 283 predicate places. [2023-11-06 23:06:15,660 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 407 transitions, 5780 flow [2023-11-06 23:06:15,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 74.8076923076923) internal successors, (1945), 26 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:15,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:15,661 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:15,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-06 23:06:15,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:15,862 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:15,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:15,862 INFO L85 PathProgramCache]: Analyzing trace with hash -422435201, now seen corresponding path program 27 times [2023-11-06 23:06:15,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:15,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807946564] [2023-11-06 23:06:15,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:15,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:16,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:16,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807946564] [2023-11-06 23:06:16,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807946564] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:16,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537431594] [2023-11-06 23:06:16,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:06:16,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:16,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:16,795 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:16,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 23:06:16,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 23:06:16,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:16,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 23:06:16,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:06:17,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:17,469 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:06:17,470 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-11-06 23:06:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:06:17,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537431594] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:17,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:17,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 25 [2023-11-06 23:06:17,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491110645] [2023-11-06 23:06:17,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:17,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 23:06:17,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:17,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 23:06:17,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2023-11-06 23:06:19,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 226 [2023-11-06 23:06:19,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 407 transitions, 5780 flow. Second operand has 27 states, 27 states have (on average 73.77777777777777) internal successors, (1992), 27 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:19,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:19,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 226 [2023-11-06 23:06:19,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:21,054 INFO L124 PetriNetUnfolderBase]: 1356/2284 cut-off events. [2023-11-06 23:06:21,055 INFO L125 PetriNetUnfolderBase]: For 92785/92785 co-relation queries the response was YES. [2023-11-06 23:06:21,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21286 conditions, 2284 events. 1356/2284 cut-off events. For 92785/92785 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 12295 event pairs, 226 based on Foata normal form. 2/2284 useless extension candidates. Maximal degree in co-relation 21042. Up to 2103 conditions per place. [2023-11-06 23:06:21,091 INFO L140 encePairwiseOnDemand]: 214/226 looper letters, 381 selfloop transitions, 76 changer transitions 2/459 dead transitions. [2023-11-06 23:06:21,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 459 transitions, 7604 flow [2023-11-06 23:06:21,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 23:06:21,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 23:06:21,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1613 transitions. [2023-11-06 23:06:21,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33986514959966285 [2023-11-06 23:06:21,095 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1613 transitions. [2023-11-06 23:06:21,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1613 transitions. [2023-11-06 23:06:21,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:21,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1613 transitions. [2023-11-06 23:06:21,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 76.80952380952381) internal successors, (1613), 21 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:21,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 226.0) internal successors, (4972), 22 states have internal predecessors, (4972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:21,104 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 226.0) internal successors, (4972), 22 states have internal predecessors, (4972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:21,104 INFO L175 Difference]: Start difference. First operand has 304 places, 407 transitions, 5780 flow. Second operand 21 states and 1613 transitions. [2023-11-06 23:06:21,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 459 transitions, 7604 flow [2023-11-06 23:06:21,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 459 transitions, 6768 flow, removed 377 selfloop flow, removed 11 redundant places. [2023-11-06 23:06:21,457 INFO L231 Difference]: Finished difference. Result has 320 places, 424 transitions, 5754 flow [2023-11-06 23:06:21,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=5028, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5754, PETRI_PLACES=320, PETRI_TRANSITIONS=424} [2023-11-06 23:06:21,458 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 299 predicate places. [2023-11-06 23:06:21,458 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 424 transitions, 5754 flow [2023-11-06 23:06:21,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 73.77777777777777) internal successors, (1992), 27 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:21,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:21,459 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:21,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:21,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:21,660 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:21,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:21,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1271404149, now seen corresponding path program 28 times [2023-11-06 23:06:21,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:21,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164080463] [2023-11-06 23:06:21,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:21,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:22,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:22,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164080463] [2023-11-06 23:06:22,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164080463] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:22,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700515627] [2023-11-06 23:06:22,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:06:22,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:22,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:22,365 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:22,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-06 23:06:22,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:06:22,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:22,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 23:06:22,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:06:22,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:22,789 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:06:22,789 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-06 23:06:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:06:22,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700515627] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:22,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:22,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 21 [2023-11-06 23:06:22,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214271365] [2023-11-06 23:06:22,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:22,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 23:06:22,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:22,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 23:06:22,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2023-11-06 23:06:24,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 226 [2023-11-06 23:06:24,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 424 transitions, 5754 flow. Second operand has 23 states, 23 states have (on average 76.95652173913044) internal successors, (1770), 23 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:24,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:24,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 226 [2023-11-06 23:06:24,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:25,435 INFO L124 PetriNetUnfolderBase]: 1390/2343 cut-off events. [2023-11-06 23:06:25,435 INFO L125 PetriNetUnfolderBase]: For 96135/96135 co-relation queries the response was YES. [2023-11-06 23:06:25,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21794 conditions, 2343 events. 1390/2343 cut-off events. For 96135/96135 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 12701 event pairs, 232 based on Foata normal form. 1/2342 useless extension candidates. Maximal degree in co-relation 21540. Up to 2177 conditions per place. [2023-11-06 23:06:25,477 INFO L140 encePairwiseOnDemand]: 218/226 looper letters, 384 selfloop transitions, 68 changer transitions 1/453 dead transitions. [2023-11-06 23:06:25,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 453 transitions, 7193 flow [2023-11-06 23:06:25,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 23:06:25,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 23:06:25,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1267 transitions. [2023-11-06 23:06:25,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35038716814159293 [2023-11-06 23:06:25,480 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1267 transitions. [2023-11-06 23:06:25,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1267 transitions. [2023-11-06 23:06:25,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:25,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1267 transitions. [2023-11-06 23:06:25,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 79.1875) internal successors, (1267), 16 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:25,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 226.0) internal successors, (3842), 17 states have internal predecessors, (3842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:25,486 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 226.0) internal successors, (3842), 17 states have internal predecessors, (3842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:25,486 INFO L175 Difference]: Start difference. First operand has 320 places, 424 transitions, 5754 flow. Second operand 16 states and 1267 transitions. [2023-11-06 23:06:25,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 453 transitions, 7193 flow [2023-11-06 23:06:25,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 453 transitions, 6722 flow, removed 189 selfloop flow, removed 14 redundant places. [2023-11-06 23:06:26,003 INFO L231 Difference]: Finished difference. Result has 325 places, 432 transitions, 5760 flow [2023-11-06 23:06:26,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=5285, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5760, PETRI_PLACES=325, PETRI_TRANSITIONS=432} [2023-11-06 23:06:26,004 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 304 predicate places. [2023-11-06 23:06:26,004 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 432 transitions, 5760 flow [2023-11-06 23:06:26,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 76.95652173913044) internal successors, (1770), 23 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:26,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:26,005 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:26,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:26,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:26,205 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:26,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:26,206 INFO L85 PathProgramCache]: Analyzing trace with hash 567516257, now seen corresponding path program 29 times [2023-11-06 23:06:26,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:26,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901061912] [2023-11-06 23:06:26,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:26,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:26,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:26,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:06:26,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:26,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901061912] [2023-11-06 23:06:26,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901061912] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:26,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390112341] [2023-11-06 23:06:26,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:06:26,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:26,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:26,324 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:26,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-06 23:06:26,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 23:06:26,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:26,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:06:26,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:26,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:06:26,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:06:26,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390112341] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:26,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:26,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-06 23:06:26,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388806708] [2023-11-06 23:06:26,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:26,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 23:06:26,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:26,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 23:06:26,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:06:26,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 226 [2023-11-06 23:06:26,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 432 transitions, 5760 flow. Second operand has 19 states, 19 states have (on average 91.84210526315789) internal successors, (1745), 19 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:26,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:26,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 226 [2023-11-06 23:06:26,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:28,087 INFO L124 PetriNetUnfolderBase]: 1691/3005 cut-off events. [2023-11-06 23:06:28,087 INFO L125 PetriNetUnfolderBase]: For 127976/127988 co-relation queries the response was YES. [2023-11-06 23:06:28,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28071 conditions, 3005 events. 1691/3005 cut-off events. For 127976/127988 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 18842 event pairs, 561 based on Foata normal form. 172/3157 useless extension candidates. Maximal degree in co-relation 27873. Up to 1748 conditions per place. [2023-11-06 23:06:28,231 INFO L140 encePairwiseOnDemand]: 220/226 looper letters, 453 selfloop transitions, 84 changer transitions 28/581 dead transitions. [2023-11-06 23:06:28,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 581 transitions, 9401 flow [2023-11-06 23:06:28,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:06:28,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:06:28,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 860 transitions. [2023-11-06 23:06:28,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42281219272369713 [2023-11-06 23:06:28,238 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 860 transitions. [2023-11-06 23:06:28,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 860 transitions. [2023-11-06 23:06:28,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:28,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 860 transitions. [2023-11-06 23:06:28,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 95.55555555555556) internal successors, (860), 9 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:28,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 226.0) internal successors, (2260), 10 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:28,242 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 226.0) internal successors, (2260), 10 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:28,242 INFO L175 Difference]: Start difference. First operand has 325 places, 432 transitions, 5760 flow. Second operand 9 states and 860 transitions. [2023-11-06 23:06:28,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 581 transitions, 9401 flow [2023-11-06 23:06:28,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 581 transitions, 8804 flow, removed 239 selfloop flow, removed 16 redundant places. [2023-11-06 23:06:28,662 INFO L231 Difference]: Finished difference. Result has 309 places, 425 transitions, 6105 flow [2023-11-06 23:06:28,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=5067, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6105, PETRI_PLACES=309, PETRI_TRANSITIONS=425} [2023-11-06 23:06:28,662 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 288 predicate places. [2023-11-06 23:06:28,662 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 425 transitions, 6105 flow [2023-11-06 23:06:28,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 91.84210526315789) internal successors, (1745), 19 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:28,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:28,663 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:28,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:28,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:28,869 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:28,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:28,869 INFO L85 PathProgramCache]: Analyzing trace with hash 984040250, now seen corresponding path program 30 times [2023-11-06 23:06:28,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:28,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473113627] [2023-11-06 23:06:28,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:28,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:06:28,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:28,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473113627] [2023-11-06 23:06:28,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473113627] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:28,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484191980] [2023-11-06 23:06:28,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:06:28,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:28,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:29,001 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:29,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-06 23:06:29,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 23:06:29,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:29,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:06:29,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:06:29,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:06:29,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484191980] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:29,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:29,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-06 23:06:29,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424498746] [2023-11-06 23:06:29,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:29,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 23:06:29,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:29,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 23:06:29,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:06:29,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 226 [2023-11-06 23:06:29,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 425 transitions, 6105 flow. Second operand has 19 states, 19 states have (on average 91.89473684210526) internal successors, (1746), 19 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:29,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:29,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 226 [2023-11-06 23:06:29,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:30,699 INFO L124 PetriNetUnfolderBase]: 1389/2595 cut-off events. [2023-11-06 23:06:30,700 INFO L125 PetriNetUnfolderBase]: For 109087/109118 co-relation queries the response was YES. [2023-11-06 23:06:30,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24579 conditions, 2595 events. 1389/2595 cut-off events. For 109087/109118 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 16616 event pairs, 523 based on Foata normal form. 164/2759 useless extension candidates. Maximal degree in co-relation 24205. Up to 1767 conditions per place. [2023-11-06 23:06:30,744 INFO L140 encePairwiseOnDemand]: 220/226 looper letters, 294 selfloop transitions, 4 changer transitions 162/465 dead transitions. [2023-11-06 23:06:30,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 465 transitions, 7428 flow [2023-11-06 23:06:30,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:06:30,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:06:30,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 859 transitions. [2023-11-06 23:06:30,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4223205506391347 [2023-11-06 23:06:30,746 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 859 transitions. [2023-11-06 23:06:30,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 859 transitions. [2023-11-06 23:06:30,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:30,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 859 transitions. [2023-11-06 23:06:30,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 95.44444444444444) internal successors, (859), 9 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) [2023-11-06 23:06:30,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 226.0) internal successors, (2260), 10 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:30,751 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 226.0) internal successors, (2260), 10 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:30,751 INFO L175 Difference]: Start difference. First operand has 309 places, 425 transitions, 6105 flow. Second operand 9 states and 859 transitions. [2023-11-06 23:06:30,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 465 transitions, 7428 flow [2023-11-06 23:06:31,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 465 transitions, 7309 flow, removed 55 selfloop flow, removed 4 redundant places. [2023-11-06 23:06:31,314 INFO L231 Difference]: Finished difference. Result has 314 places, 303 transitions, 4354 flow [2023-11-06 23:06:31,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=5642, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4354, PETRI_PLACES=314, PETRI_TRANSITIONS=303} [2023-11-06 23:06:31,315 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 293 predicate places. [2023-11-06 23:06:31,315 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 303 transitions, 4354 flow [2023-11-06 23:06:31,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 91.89473684210526) internal successors, (1746), 19 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:31,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:31,316 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:31,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:31,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:31,516 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:31,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:31,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1424393535, now seen corresponding path program 31 times [2023-11-06 23:06:31,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:31,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136363294] [2023-11-06 23:06:31,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:31,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:06:31,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:31,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136363294] [2023-11-06 23:06:31,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136363294] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:31,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75261509] [2023-11-06 23:06:31,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:06:31,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:31,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:31,620 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:31,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-06 23:06:31,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:31,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:06:31,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:31,869 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:06:31,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:06:31,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75261509] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:31,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:31,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-06 23:06:31,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007000937] [2023-11-06 23:06:31,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:31,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 23:06:31,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:31,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 23:06:31,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:06:32,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 226 [2023-11-06 23:06:32,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 303 transitions, 4354 flow. Second operand has 19 states, 19 states have (on average 91.89473684210526) internal successors, (1746), 19 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:32,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:32,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 226 [2023-11-06 23:06:32,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:32,814 INFO L124 PetriNetUnfolderBase]: 835/1446 cut-off events. [2023-11-06 23:06:32,815 INFO L125 PetriNetUnfolderBase]: For 72110/72135 co-relation queries the response was YES. [2023-11-06 23:06:32,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13880 conditions, 1446 events. 835/1446 cut-off events. For 72110/72135 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7304 event pairs, 160 based on Foata normal form. 188/1632 useless extension candidates. Maximal degree in co-relation 13742. Up to 780 conditions per place. [2023-11-06 23:06:32,840 INFO L140 encePairwiseOnDemand]: 220/226 looper letters, 182 selfloop transitions, 106 changer transitions 0/293 dead transitions. [2023-11-06 23:06:32,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 293 transitions, 5016 flow [2023-11-06 23:06:32,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:06:32,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 23:06:32,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 938 transitions. [2023-11-06 23:06:32,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4150442477876106 [2023-11-06 23:06:32,844 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 938 transitions. [2023-11-06 23:06:32,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 938 transitions. [2023-11-06 23:06:32,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:32,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 938 transitions. [2023-11-06 23:06:32,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 93.8) internal successors, (938), 10 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:32,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:32,849 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:32,850 INFO L175 Difference]: Start difference. First operand has 314 places, 303 transitions, 4354 flow. Second operand 10 states and 938 transitions. [2023-11-06 23:06:32,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 293 transitions, 5016 flow [2023-11-06 23:06:33,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 293 transitions, 4313 flow, removed 296 selfloop flow, removed 31 redundant places. [2023-11-06 23:06:33,095 INFO L231 Difference]: Finished difference. Result has 262 places, 278 transitions, 3722 flow [2023-11-06 23:06:33,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=3337, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3722, PETRI_PLACES=262, PETRI_TRANSITIONS=278} [2023-11-06 23:06:33,096 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 241 predicate places. [2023-11-06 23:06:33,096 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 278 transitions, 3722 flow [2023-11-06 23:06:33,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 91.89473684210526) internal successors, (1746), 19 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:33,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:33,097 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:33,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-06 23:06:33,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-06 23:06:33,297 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:33,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:33,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1290211152, now seen corresponding path program 32 times [2023-11-06 23:06:33,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:33,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070650171] [2023-11-06 23:06:33,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:33,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:33,433 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:06:33,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:33,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070650171] [2023-11-06 23:06:33,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070650171] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:33,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691708856] [2023-11-06 23:06:33,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:06:33,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:33,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:33,436 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:33,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-06 23:06:33,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:06:33,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:33,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:06:33,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:33,708 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:06:33,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:33,813 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:06:33,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691708856] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:33,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:33,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-06 23:06:33,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562235876] [2023-11-06 23:06:33,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:33,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 23:06:33,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:33,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 23:06:33,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:06:34,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 226 [2023-11-06 23:06:34,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 278 transitions, 3722 flow. Second operand has 19 states, 19 states have (on average 91.89473684210526) internal successors, (1746), 19 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:34,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:34,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 226 [2023-11-06 23:06:34,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:34,578 INFO L124 PetriNetUnfolderBase]: 636/1113 cut-off events. [2023-11-06 23:06:34,578 INFO L125 PetriNetUnfolderBase]: For 55543/55549 co-relation queries the response was YES. [2023-11-06 23:06:34,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10852 conditions, 1113 events. 636/1113 cut-off events. For 55543/55549 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5246 event pairs, 180 based on Foata normal form. 110/1217 useless extension candidates. Maximal degree in co-relation 10737. Up to 685 conditions per place. [2023-11-06 23:06:34,599 INFO L140 encePairwiseOnDemand]: 220/226 looper letters, 158 selfloop transitions, 97 changer transitions 0/264 dead transitions. [2023-11-06 23:06:34,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 264 transitions, 4336 flow [2023-11-06 23:06:34,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:06:34,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 23:06:34,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 938 transitions. [2023-11-06 23:06:34,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4150442477876106 [2023-11-06 23:06:34,603 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 938 transitions. [2023-11-06 23:06:34,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 938 transitions. [2023-11-06 23:06:34,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:34,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 938 transitions. [2023-11-06 23:06:34,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 93.8) internal successors, (938), 10 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:34,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:34,650 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:34,650 INFO L175 Difference]: Start difference. First operand has 262 places, 278 transitions, 3722 flow. Second operand 10 states and 938 transitions. [2023-11-06 23:06:34,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 264 transitions, 4336 flow [2023-11-06 23:06:34,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 264 transitions, 3805 flow, removed 185 selfloop flow, removed 22 redundant places. [2023-11-06 23:06:34,863 INFO L231 Difference]: Finished difference. Result has 245 places, 250 transitions, 3294 flow [2023-11-06 23:06:34,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=2973, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3294, PETRI_PLACES=245, PETRI_TRANSITIONS=250} [2023-11-06 23:06:34,864 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 224 predicate places. [2023-11-06 23:06:34,864 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 250 transitions, 3294 flow [2023-11-06 23:06:34,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 91.89473684210526) internal successors, (1746), 19 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:34,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:34,865 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:34,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:35,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-06 23:06:35,066 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:35,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:35,066 INFO L85 PathProgramCache]: Analyzing trace with hash 192419168, now seen corresponding path program 33 times [2023-11-06 23:06:35,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:35,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533170101] [2023-11-06 23:06:35,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:35,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:36,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:36,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533170101] [2023-11-06 23:06:36,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533170101] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:36,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644890415] [2023-11-06 23:06:36,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:06:36,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:36,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:36,345 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:36,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-06 23:06:36,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 23:06:36,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:36,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-06 23:06:36,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:36,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:36,877 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 20 [2023-11-06 23:06:37,254 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:06:37,254 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 19 treesize of output 16 [2023-11-06 23:06:37,302 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:06:37,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:37,847 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1000 (Array Int Int))) (let ((.cse1 (+ c_~A~0.offset (* c_~N~0 4) (- 4)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1000) c_~A~0.base))) (+ (select .cse0 .cse1) (select .cse0 (+ c_~A~0.offset 4)) (select .cse0 c_~A~0.offset))) (let ((.cse2 (select |c_#memory_int| c_~A~0.base))) (+ (select .cse2 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) c_~counter~0 (select .cse2 .cse1)))))) is different from false [2023-11-06 23:06:37,897 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:06:37,898 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 94 treesize of output 111 [2023-11-06 23:06:37,919 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:06:37,919 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 31 [2023-11-06 23:06:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2023-11-06 23:06:38,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644890415] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:38,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:38,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-11-06 23:06:38,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972534531] [2023-11-06 23:06:38,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:38,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-06 23:06:38,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:38,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-06 23:06:38,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1567, Unknown=9, NotChecked=80, Total=1806 [2023-11-06 23:06:38,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 226 [2023-11-06 23:06:38,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 250 transitions, 3294 flow. Second operand has 43 states, 43 states have (on average 58.46511627906977) internal successors, (2514), 43 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:38,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:38,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 226 [2023-11-06 23:06:38,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:42,747 INFO L124 PetriNetUnfolderBase]: 716/1257 cut-off events. [2023-11-06 23:06:42,747 INFO L125 PetriNetUnfolderBase]: For 39352/39352 co-relation queries the response was YES. [2023-11-06 23:06:42,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11510 conditions, 1257 events. 716/1257 cut-off events. For 39352/39352 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6061 event pairs, 98 based on Foata normal form. 1/1258 useless extension candidates. Maximal degree in co-relation 11407. Up to 955 conditions per place. [2023-11-06 23:06:42,779 INFO L140 encePairwiseOnDemand]: 215/226 looper letters, 202 selfloop transitions, 137 changer transitions 6/345 dead transitions. [2023-11-06 23:06:42,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 345 transitions, 5108 flow [2023-11-06 23:06:42,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-06 23:06:42,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-06 23:06:42,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2376 transitions. [2023-11-06 23:06:42,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.269571136827774 [2023-11-06 23:06:42,786 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2376 transitions. [2023-11-06 23:06:42,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2376 transitions. [2023-11-06 23:06:42,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:42,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2376 transitions. [2023-11-06 23:06:42,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 60.92307692307692) internal successors, (2376), 39 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:42,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 226.0) internal successors, (9040), 40 states have internal predecessors, (9040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:42,802 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 226.0) internal successors, (9040), 40 states have internal predecessors, (9040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:42,802 INFO L175 Difference]: Start difference. First operand has 245 places, 250 transitions, 3294 flow. Second operand 39 states and 2376 transitions. [2023-11-06 23:06:42,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 345 transitions, 5108 flow [2023-11-06 23:06:43,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 345 transitions, 4702 flow, removed 108 selfloop flow, removed 20 redundant places. [2023-11-06 23:06:43,010 INFO L231 Difference]: Finished difference. Result has 268 places, 280 transitions, 4122 flow [2023-11-06 23:06:43,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=3023, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4122, PETRI_PLACES=268, PETRI_TRANSITIONS=280} [2023-11-06 23:06:43,011 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 247 predicate places. [2023-11-06 23:06:43,011 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 280 transitions, 4122 flow [2023-11-06 23:06:43,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 58.46511627906977) internal successors, (2514), 43 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:43,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:43,013 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:43,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:43,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-06 23:06:43,214 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:43,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:43,215 INFO L85 PathProgramCache]: Analyzing trace with hash 550791890, now seen corresponding path program 34 times [2023-11-06 23:06:43,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:43,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894342960] [2023-11-06 23:06:43,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:43,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:44,118 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:44,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:44,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894342960] [2023-11-06 23:06:44,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894342960] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:44,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85808254] [2023-11-06 23:06:44,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:06:44,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:44,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:44,120 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:44,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-06 23:06:44,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:06:44,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:44,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-06 23:06:44,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:44,594 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:06:44,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:44,905 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:06:44,905 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 89 [2023-11-06 23:06:45,114 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:06:45,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85808254] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:45,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:45,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 28 [2023-11-06 23:06:45,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332497220] [2023-11-06 23:06:45,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:45,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 23:06:45,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:45,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 23:06:45,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2023-11-06 23:06:47,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 226 [2023-11-06 23:06:47,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 280 transitions, 4122 flow. Second operand has 30 states, 30 states have (on average 82.86666666666666) internal successors, (2486), 30 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:47,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:47,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 226 [2023-11-06 23:06:47,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:49,168 INFO L124 PetriNetUnfolderBase]: 802/1413 cut-off events. [2023-11-06 23:06:49,169 INFO L125 PetriNetUnfolderBase]: For 35852/35852 co-relation queries the response was YES. [2023-11-06 23:06:49,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12633 conditions, 1413 events. 802/1413 cut-off events. For 35852/35852 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7116 event pairs, 124 based on Foata normal form. 1/1414 useless extension candidates. Maximal degree in co-relation 12537. Up to 1160 conditions per place. [2023-11-06 23:06:49,191 INFO L140 encePairwiseOnDemand]: 217/226 looper letters, 260 selfloop transitions, 97 changer transitions 1/358 dead transitions. [2023-11-06 23:06:49,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 358 transitions, 5995 flow [2023-11-06 23:06:49,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 23:06:49,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 23:06:49,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1804 transitions. [2023-11-06 23:06:49,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3801095659502739 [2023-11-06 23:06:49,195 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1804 transitions. [2023-11-06 23:06:49,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1804 transitions. [2023-11-06 23:06:49,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:49,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1804 transitions. [2023-11-06 23:06:49,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 85.9047619047619) internal successors, (1804), 21 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:49,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 226.0) internal successors, (4972), 22 states have internal predecessors, (4972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:49,203 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 226.0) internal successors, (4972), 22 states have internal predecessors, (4972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:49,203 INFO L175 Difference]: Start difference. First operand has 268 places, 280 transitions, 4122 flow. Second operand 21 states and 1804 transitions. [2023-11-06 23:06:49,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 358 transitions, 5995 flow [2023-11-06 23:06:49,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 358 transitions, 4558 flow, removed 594 selfloop flow, removed 33 redundant places. [2023-11-06 23:06:49,353 INFO L231 Difference]: Finished difference. Result has 261 places, 317 transitions, 3923 flow [2023-11-06 23:06:49,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=3251, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3923, PETRI_PLACES=261, PETRI_TRANSITIONS=317} [2023-11-06 23:06:49,354 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 240 predicate places. [2023-11-06 23:06:49,354 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 317 transitions, 3923 flow [2023-11-06 23:06:49,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 82.86666666666666) internal successors, (2486), 30 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:49,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:49,355 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:49,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-06 23:06:49,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-06 23:06:49,562 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:49,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:49,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1190825530, now seen corresponding path program 35 times [2023-11-06 23:06:49,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:49,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311217748] [2023-11-06 23:06:49,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:49,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:50,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:50,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:50,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311217748] [2023-11-06 23:06:50,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311217748] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:50,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866901134] [2023-11-06 23:06:50,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:06:50,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:50,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:50,581 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:50,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-06 23:06:50,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 23:06:50,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:50,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-06 23:06:50,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:50,975 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 23:06:51,026 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:06:51,074 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:06:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:51,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:51,882 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:06:51,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866901134] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:51,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:51,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 8] total 34 [2023-11-06 23:06:51,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633760386] [2023-11-06 23:06:51,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:51,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-06 23:06:51,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:51,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-06 23:06:51,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2023-11-06 23:06:55,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 226 [2023-11-06 23:06:55,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 317 transitions, 3923 flow. Second operand has 36 states, 36 states have (on average 76.63888888888889) internal successors, (2759), 36 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:55,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:55,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 226 [2023-11-06 23:06:55,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:57,480 INFO L124 PetriNetUnfolderBase]: 854/1508 cut-off events. [2023-11-06 23:06:57,480 INFO L125 PetriNetUnfolderBase]: For 30660/30660 co-relation queries the response was YES. [2023-11-06 23:06:57,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11863 conditions, 1508 events. 854/1508 cut-off events. For 30660/30660 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7794 event pairs, 159 based on Foata normal form. 1/1509 useless extension candidates. Maximal degree in co-relation 11772. Up to 1276 conditions per place. [2023-11-06 23:06:57,504 INFO L140 encePairwiseOnDemand]: 215/226 looper letters, 271 selfloop transitions, 107 changer transitions 1/379 dead transitions. [2023-11-06 23:06:57,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 379 transitions, 5265 flow [2023-11-06 23:06:57,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 23:06:57,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 23:06:57,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2449 transitions. [2023-11-06 23:06:57,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3495575221238938 [2023-11-06 23:06:57,512 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2449 transitions. [2023-11-06 23:06:57,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2449 transitions. [2023-11-06 23:06:57,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:57,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2449 transitions. [2023-11-06 23:06:57,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 79.0) internal successors, (2449), 31 states have internal predecessors, (2449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:57,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 226.0) internal successors, (7232), 32 states have internal predecessors, (7232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:57,574 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 226.0) internal successors, (7232), 32 states have internal predecessors, (7232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:57,574 INFO L175 Difference]: Start difference. First operand has 261 places, 317 transitions, 3923 flow. Second operand 31 states and 2449 transitions. [2023-11-06 23:06:57,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 379 transitions, 5265 flow [2023-11-06 23:06:57,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 379 transitions, 5139 flow, removed 41 selfloop flow, removed 9 redundant places. [2023-11-06 23:06:57,671 INFO L231 Difference]: Finished difference. Result has 288 places, 337 transitions, 4488 flow [2023-11-06 23:06:57,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=3797, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=4488, PETRI_PLACES=288, PETRI_TRANSITIONS=337} [2023-11-06 23:06:57,673 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 267 predicate places. [2023-11-06 23:06:57,673 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 337 transitions, 4488 flow [2023-11-06 23:06:57,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 76.63888888888889) internal successors, (2759), 36 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:57,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:57,674 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:57,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:57,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-06 23:06:57,882 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:57,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:57,883 INFO L85 PathProgramCache]: Analyzing trace with hash 993837110, now seen corresponding path program 36 times [2023-11-06 23:06:57,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:57,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683046293] [2023-11-06 23:06:57,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:57,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:58,943 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:58,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:58,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683046293] [2023-11-06 23:06:58,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683046293] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:58,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773687810] [2023-11-06 23:06:58,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:06:58,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:58,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:58,945 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:58,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-06 23:06:59,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-06 23:06:59,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:59,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-06 23:06:59,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:59,404 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 23:06:59,467 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:06:59,508 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:06:59,866 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:06:59,866 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 19 treesize of output 16 [2023-11-06 23:06:59,917 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:06:59,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:07:00,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773687810] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:00,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:00,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 10] total 35 [2023-11-06 23:07:00,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877799954] [2023-11-06 23:07:00,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:00,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-06 23:07:00,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:00,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-06 23:07:00,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 23:07:03,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 226 [2023-11-06 23:07:03,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 337 transitions, 4488 flow. Second operand has 37 states, 37 states have (on average 73.5945945945946) internal successors, (2723), 37 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:03,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:03,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 226 [2023-11-06 23:07:03,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:06,735 INFO L124 PetriNetUnfolderBase]: 941/1660 cut-off events. [2023-11-06 23:07:06,735 INFO L125 PetriNetUnfolderBase]: For 44668/44668 co-relation queries the response was YES. [2023-11-06 23:07:06,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13935 conditions, 1660 events. 941/1660 cut-off events. For 44668/44668 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8801 event pairs, 145 based on Foata normal form. 1/1661 useless extension candidates. Maximal degree in co-relation 13838. Up to 1379 conditions per place. [2023-11-06 23:07:06,763 INFO L140 encePairwiseOnDemand]: 215/226 looper letters, 282 selfloop transitions, 133 changer transitions 5/420 dead transitions. [2023-11-06 23:07:06,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 420 transitions, 6421 flow [2023-11-06 23:07:06,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-06 23:07:06,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-06 23:07:06,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2653 transitions. [2023-11-06 23:07:06,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33539823008849556 [2023-11-06 23:07:06,768 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2653 transitions. [2023-11-06 23:07:06,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2653 transitions. [2023-11-06 23:07:06,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:06,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2653 transitions. [2023-11-06 23:07:06,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 75.8) internal successors, (2653), 35 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:06,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 226.0) internal successors, (8136), 36 states have internal predecessors, (8136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:06,783 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 226.0) internal successors, (8136), 36 states have internal predecessors, (8136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:06,783 INFO L175 Difference]: Start difference. First operand has 288 places, 337 transitions, 4488 flow. Second operand 35 states and 2653 transitions. [2023-11-06 23:07:06,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 420 transitions, 6421 flow [2023-11-06 23:07:06,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 420 transitions, 5961 flow, removed 167 selfloop flow, removed 19 redundant places. [2023-11-06 23:07:06,951 INFO L231 Difference]: Finished difference. Result has 309 places, 371 transitions, 5314 flow [2023-11-06 23:07:06,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=4138, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=5314, PETRI_PLACES=309, PETRI_TRANSITIONS=371} [2023-11-06 23:07:06,953 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 288 predicate places. [2023-11-06 23:07:06,953 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 371 transitions, 5314 flow [2023-11-06 23:07:06,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 73.5945945945946) internal successors, (2723), 37 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:06,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:06,954 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:06,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:07,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:07,162 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:07:07,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:07,162 INFO L85 PathProgramCache]: Analyzing trace with hash -752212226, now seen corresponding path program 37 times [2023-11-06 23:07:07,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:07,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834389222] [2023-11-06 23:07:07,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:07,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:08,128 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:08,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:08,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834389222] [2023-11-06 23:07:08,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834389222] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:08,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687913323] [2023-11-06 23:07:08,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:07:08,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:08,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:08,130 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:08,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-06 23:07:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:08,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-06 23:07:08,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:08,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:07:08,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:09,054 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:07:09,055 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 89 [2023-11-06 23:07:09,325 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:07:09,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687913323] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:09,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:09,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 8] total 29 [2023-11-06 23:07:09,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153027812] [2023-11-06 23:07:09,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:09,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-06 23:07:09,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:09,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-06 23:07:09,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2023-11-06 23:07:11,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 226 [2023-11-06 23:07:11,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 371 transitions, 5314 flow. Second operand has 31 states, 31 states have (on average 82.64516129032258) internal successors, (2562), 31 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:11,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:11,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 226 [2023-11-06 23:07:11,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:13,113 INFO L124 PetriNetUnfolderBase]: 1006/1758 cut-off events. [2023-11-06 23:07:13,113 INFO L125 PetriNetUnfolderBase]: For 52569/52569 co-relation queries the response was YES. [2023-11-06 23:07:13,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15998 conditions, 1758 events. 1006/1758 cut-off events. For 52569/52569 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9312 event pairs, 180 based on Foata normal form. 2/1760 useless extension candidates. Maximal degree in co-relation 15895. Up to 1573 conditions per place. [2023-11-06 23:07:13,145 INFO L140 encePairwiseOnDemand]: 215/226 looper letters, 339 selfloop transitions, 87 changer transitions 2/428 dead transitions. [2023-11-06 23:07:13,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 428 transitions, 7507 flow [2023-11-06 23:07:13,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 23:07:13,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-06 23:07:13,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2138 transitions. [2023-11-06 23:07:13,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3784070796460177 [2023-11-06 23:07:13,149 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2138 transitions. [2023-11-06 23:07:13,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2138 transitions. [2023-11-06 23:07:13,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:13,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2138 transitions. [2023-11-06 23:07:13,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 85.52) internal successors, (2138), 25 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:13,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 226.0) internal successors, (5876), 26 states have internal predecessors, (5876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:13,157 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 226.0) internal successors, (5876), 26 states have internal predecessors, (5876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:13,157 INFO L175 Difference]: Start difference. First operand has 309 places, 371 transitions, 5314 flow. Second operand 25 states and 2138 transitions. [2023-11-06 23:07:13,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 428 transitions, 7507 flow [2023-11-06 23:07:13,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 428 transitions, 6873 flow, removed 259 selfloop flow, removed 27 redundant places. [2023-11-06 23:07:13,366 INFO L231 Difference]: Finished difference. Result has 311 places, 396 transitions, 6029 flow [2023-11-06 23:07:13,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=4758, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=6029, PETRI_PLACES=311, PETRI_TRANSITIONS=396} [2023-11-06 23:07:13,367 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 290 predicate places. [2023-11-06 23:07:13,367 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 396 transitions, 6029 flow [2023-11-06 23:07:13,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 82.64516129032258) internal successors, (2562), 31 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:13,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:13,369 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:13,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:13,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:13,576 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:07:13,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:13,576 INFO L85 PathProgramCache]: Analyzing trace with hash -706072570, now seen corresponding path program 38 times [2023-11-06 23:07:13,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:13,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382239715] [2023-11-06 23:07:13,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:13,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:13,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:14,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:14,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382239715] [2023-11-06 23:07:14,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382239715] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:14,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062714363] [2023-11-06 23:07:14,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:07:14,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:14,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:14,594 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:14,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-06 23:07:14,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:07:14,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:14,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-06 23:07:14,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:15,384 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:15,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:15,953 INFO L322 Elim1Store]: treesize reduction 16, result has 83.8 percent of original size [2023-11-06 23:07:15,953 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 93 [2023-11-06 23:07:16,643 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:16,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062714363] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:16,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:16,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 38 [2023-11-06 23:07:16,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364698762] [2023-11-06 23:07:16,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:16,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-06 23:07:16,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:16,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-06 23:07:16,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1385, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 23:07:20,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 226 [2023-11-06 23:07:20,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 396 transitions, 6029 flow. Second operand has 40 states, 40 states have (on average 79.45) internal successors, (3178), 40 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:20,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:20,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 226 [2023-11-06 23:07:20,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:25,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:07:26,643 INFO L124 PetriNetUnfolderBase]: 1304/2250 cut-off events. [2023-11-06 23:07:26,643 INFO L125 PetriNetUnfolderBase]: For 80672/80672 co-relation queries the response was YES. [2023-11-06 23:07:26,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22555 conditions, 2250 events. 1304/2250 cut-off events. For 80672/80672 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12358 event pairs, 176 based on Foata normal form. 2/2252 useless extension candidates. Maximal degree in co-relation 22447. Up to 1642 conditions per place. [2023-11-06 23:07:26,679 INFO L140 encePairwiseOnDemand]: 215/226 looper letters, 375 selfloop transitions, 231 changer transitions 13/619 dead transitions. [2023-11-06 23:07:26,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 619 transitions, 11526 flow [2023-11-06 23:07:26,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-06 23:07:26,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-11-06 23:07:26,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4205 transitions. [2023-11-06 23:07:26,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3648273468679507 [2023-11-06 23:07:26,687 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4205 transitions. [2023-11-06 23:07:26,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4205 transitions. [2023-11-06 23:07:26,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:26,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4205 transitions. [2023-11-06 23:07:26,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 82.45098039215686) internal successors, (4205), 51 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:26,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 226.0) internal successors, (11752), 52 states have internal predecessors, (11752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:26,708 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 226.0) internal successors, (11752), 52 states have internal predecessors, (11752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:26,708 INFO L175 Difference]: Start difference. First operand has 311 places, 396 transitions, 6029 flow. Second operand 51 states and 4205 transitions. [2023-11-06 23:07:26,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 619 transitions, 11526 flow [2023-11-06 23:07:27,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 619 transitions, 10011 flow, removed 690 selfloop flow, removed 13 redundant places. [2023-11-06 23:07:27,034 INFO L231 Difference]: Finished difference. Result has 362 places, 522 transitions, 8774 flow [2023-11-06 23:07:27,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=5192, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=8774, PETRI_PLACES=362, PETRI_TRANSITIONS=522} [2023-11-06 23:07:27,035 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 341 predicate places. [2023-11-06 23:07:27,035 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 522 transitions, 8774 flow [2023-11-06 23:07:27,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 79.45) internal successors, (3178), 40 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:27,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:27,036 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:27,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:27,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-11-06 23:07:27,243 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:07:27,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:27,243 INFO L85 PathProgramCache]: Analyzing trace with hash -134617764, now seen corresponding path program 39 times [2023-11-06 23:07:27,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:27,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561506333] [2023-11-06 23:07:27,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:27,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:28,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:28,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561506333] [2023-11-06 23:07:28,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561506333] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:28,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726269614] [2023-11-06 23:07:28,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:07:28,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:28,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:28,393 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:28,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-06 23:07:28,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 23:07:28,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:28,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 69 conjunts are in the unsatisfiable core [2023-11-06 23:07:28,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:28,686 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 23:07:28,746 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:07:28,793 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:07:29,199 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:07:29,200 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 17 treesize of output 14 [2023-11-06 23:07:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:07:29,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:07:29,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726269614] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:29,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:29,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 11] total 39 [2023-11-06 23:07:29,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188170095] [2023-11-06 23:07:29,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:29,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-06 23:07:29,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:29,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-06 23:07:29,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1473, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 23:07:33,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 226 [2023-11-06 23:07:33,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 522 transitions, 8774 flow. Second operand has 41 states, 41 states have (on average 73.46341463414635) internal successors, (3012), 41 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:33,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:33,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 226 [2023-11-06 23:07:33,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:38,392 INFO L124 PetriNetUnfolderBase]: 1382/2435 cut-off events. [2023-11-06 23:07:38,392 INFO L125 PetriNetUnfolderBase]: For 90240/90240 co-relation queries the response was YES. [2023-11-06 23:07:38,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24010 conditions, 2435 events. 1382/2435 cut-off events. For 90240/90240 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13940 event pairs, 169 based on Foata normal form. 1/2434 useless extension candidates. Maximal degree in co-relation 23887. Up to 1806 conditions per place. [2023-11-06 23:07:38,426 INFO L140 encePairwiseOnDemand]: 214/226 looper letters, 352 selfloop transitions, 279 changer transitions 7/638 dead transitions. [2023-11-06 23:07:38,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 638 transitions, 11797 flow [2023-11-06 23:07:38,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-06 23:07:38,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-06 23:07:38,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3716 transitions. [2023-11-06 23:07:38,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33556077298175907 [2023-11-06 23:07:38,432 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3716 transitions. [2023-11-06 23:07:38,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3716 transitions. [2023-11-06 23:07:38,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:38,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3716 transitions. [2023-11-06 23:07:38,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 75.83673469387755) internal successors, (3716), 49 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:38,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 226.0) internal successors, (11300), 50 states have internal predecessors, (11300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:38,449 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 226.0) internal successors, (11300), 50 states have internal predecessors, (11300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:38,450 INFO L175 Difference]: Start difference. First operand has 362 places, 522 transitions, 8774 flow. Second operand 49 states and 3716 transitions. [2023-11-06 23:07:38,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 638 transitions, 11797 flow [2023-11-06 23:07:38,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 638 transitions, 10546 flow, removed 584 selfloop flow, removed 12 redundant places. [2023-11-06 23:07:38,833 INFO L231 Difference]: Finished difference. Result has 408 places, 568 transitions, 9715 flow [2023-11-06 23:07:38,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=7677, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=9715, PETRI_PLACES=408, PETRI_TRANSITIONS=568} [2023-11-06 23:07:38,834 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 387 predicate places. [2023-11-06 23:07:38,834 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 568 transitions, 9715 flow [2023-11-06 23:07:38,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 73.46341463414635) internal successors, (3012), 41 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:38,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:38,835 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:38,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:39,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-11-06 23:07:39,035 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:07:39,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:39,036 INFO L85 PathProgramCache]: Analyzing trace with hash -592528940, now seen corresponding path program 40 times [2023-11-06 23:07:39,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:39,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715255333] [2023-11-06 23:07:39,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:39,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:39,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:40,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:40,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715255333] [2023-11-06 23:07:40,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715255333] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:40,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390032283] [2023-11-06 23:07:40,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:07:40,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:40,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:40,195 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:40,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_406710ed-a5f5-4115-83d6-06ace9343ea7/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-06 23:07:40,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:07:40,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:40,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-06 23:07:40,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:40,872 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:07:40,873 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 15 treesize of output 14 [2023-11-06 23:07:40,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:40,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:41,280 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:07:41,280 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 111 [2023-11-06 23:07:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:42,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390032283] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:42,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:42,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-11-06 23:07:42,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251730302] [2023-11-06 23:07:42,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:42,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-06 23:07:42,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:42,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-06 23:07:42,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1610, Unknown=0, NotChecked=0, Total=1806 [2023-11-06 23:07:46,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 226 [2023-11-06 23:07:46,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 568 transitions, 9715 flow. Second operand has 43 states, 43 states have (on average 73.51162790697674) internal successors, (3161), 43 states have internal predecessors, (3161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:46,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:46,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 226 [2023-11-06 23:07:46,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:49,547 INFO L124 PetriNetUnfolderBase]: 1441/2529 cut-off events. [2023-11-06 23:07:49,547 INFO L125 PetriNetUnfolderBase]: For 95055/95055 co-relation queries the response was YES. [2023-11-06 23:07:49,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25302 conditions, 2529 events. 1441/2529 cut-off events. For 95055/95055 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 14586 event pairs, 226 based on Foata normal form. 2/2529 useless extension candidates. Maximal degree in co-relation 25168. Up to 2189 conditions per place. [2023-11-06 23:07:49,590 INFO L140 encePairwiseOnDemand]: 214/226 looper letters, 481 selfloop transitions, 169 changer transitions 6/656 dead transitions. [2023-11-06 23:07:49,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 656 transitions, 12343 flow [2023-11-06 23:07:49,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-06 23:07:49,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-06 23:07:49,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2966 transitions. [2023-11-06 23:07:49,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3365100975720445 [2023-11-06 23:07:49,595 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2966 transitions. [2023-11-06 23:07:49,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2966 transitions. [2023-11-06 23:07:49,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:49,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2966 transitions. [2023-11-06 23:07:49,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 76.05128205128206) internal successors, (2966), 39 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:49,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 226.0) internal successors, (9040), 40 states have internal predecessors, (9040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:49,609 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 226.0) internal successors, (9040), 40 states have internal predecessors, (9040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:49,609 INFO L175 Difference]: Start difference. First operand has 408 places, 568 transitions, 9715 flow. Second operand 39 states and 2966 transitions. [2023-11-06 23:07:49,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 656 transitions, 12343 flow