./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1-alt.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_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/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_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/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_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/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 fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:47:44,637 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:47:44,720 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:47:44,726 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:47:44,726 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:47:44,754 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:47:44,755 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:47:44,755 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:47:44,756 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:47:44,757 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:47:44,757 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:47:44,758 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:47:44,758 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:47:44,759 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:47:44,760 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:47:44,760 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:47:44,761 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:47:44,761 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:47:44,762 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:47:44,762 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:47:44,763 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:47:44,768 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:47:44,768 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:47:44,769 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:47:44,773 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:47:44,774 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:47:44,775 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:47:44,775 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:47:44,776 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:47:44,776 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:47:44,777 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:47:44,778 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:47:44,778 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:47:44,778 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:47:44,795 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:47:44,795 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:47:44,795 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:47:44,795 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:47:44,796 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:47:44,796 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_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 [2023-11-06 22:47:45,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:47:45,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:47:45,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:47:45,094 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:47:45,094 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:47:45,095 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2023-11-06 22:47:48,183 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:47:48,437 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:47:48,438 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2023-11-06 22:47:48,445 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/data/46dbe45ae/4e38e63c90a44f8a850957beaccfe543/FLAG7377ceb2a [2023-11-06 22:47:48,459 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/data/46dbe45ae/4e38e63c90a44f8a850957beaccfe543 [2023-11-06 22:47:48,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:47:48,464 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:47:48,465 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:47:48,466 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:47:48,475 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:47:48,476 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:48" (1/1) ... [2023-11-06 22:47:48,477 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74e6a99d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:48, skipping insertion in model container [2023-11-06 22:47:48,478 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:48" (1/1) ... [2023-11-06 22:47:48,504 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:47:48,676 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_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2023-11-06 22:47:48,680 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:47:48,690 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:47:48,707 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_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2023-11-06 22:47:48,708 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:47:48,716 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:47:48,717 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:47:48,724 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:47:48,724 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:48 WrapperNode [2023-11-06 22:47:48,725 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:47:48,726 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:47:48,726 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:47:48,726 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:47:48,734 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:48" (1/1) ... [2023-11-06 22:47:48,741 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:48" (1/1) ... [2023-11-06 22:47:48,762 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 78 [2023-11-06 22:47:48,763 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:47:48,764 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:47:48,764 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:47:48,764 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:47:48,772 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:48" (1/1) ... [2023-11-06 22:47:48,772 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:48" (1/1) ... [2023-11-06 22:47:48,776 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:48" (1/1) ... [2023-11-06 22:47:48,776 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:48" (1/1) ... [2023-11-06 22:47:48,782 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:48" (1/1) ... [2023-11-06 22:47:48,785 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:48" (1/1) ... [2023-11-06 22:47:48,789 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:48" (1/1) ... [2023-11-06 22:47:48,791 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:48" (1/1) ... [2023-11-06 22:47:48,794 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:47:48,795 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:47:48,795 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:47:48,795 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:47:48,796 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:48" (1/1) ... [2023-11-06 22:47:48,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:47:48,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:47:48,833 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:47:48,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:47:48,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:47:48,887 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:47:48,887 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:47:48,888 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:47:48,888 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:47:48,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:47:48,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:47:48,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:47:48,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:47:48,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:47:48,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:47:48,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:47:48,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:47:48,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:47:48,894 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 22:47:49,063 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:47:49,067 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:47:49,385 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:47:49,453 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:47:49,454 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:47:49,456 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:49 BoogieIcfgContainer [2023-11-06 22:47:49,456 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:47:49,459 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:47:49,459 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:47:49,463 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:47:49,463 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:47:48" (1/3) ... [2023-11-06 22:47:49,464 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d8b46fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:49, skipping insertion in model container [2023-11-06 22:47:49,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:48" (2/3) ... [2023-11-06 22:47:49,464 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d8b46fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:49, skipping insertion in model container [2023-11-06 22:47:49,465 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:49" (3/3) ... [2023-11-06 22:47:49,466 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2023-11-06 22:47:49,476 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:47:49,486 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:47:49,486 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:47:49,486 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:47:49,541 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:47:49,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 192 flow [2023-11-06 22:47:49,633 INFO L124 PetriNetUnfolderBase]: 6/87 cut-off events. [2023-11-06 22:47:49,634 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:47:49,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 6/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2023-11-06 22:47:49,639 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 192 flow [2023-11-06 22:47:49,645 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 78 transitions, 168 flow [2023-11-06 22:47:49,649 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:47:49,659 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 78 transitions, 168 flow [2023-11-06 22:47:49,662 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 78 transitions, 168 flow [2023-11-06 22:47:49,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 78 transitions, 168 flow [2023-11-06 22:47:49,694 INFO L124 PetriNetUnfolderBase]: 6/78 cut-off events. [2023-11-06 22:47:49,694 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:47:49,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 78 events. 6/78 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2023-11-06 22:47:49,697 INFO L119 LiptonReduction]: Number of co-enabled transitions 572 [2023-11-06 22:47:52,690 INFO L134 LiptonReduction]: Checked pairs total: 601 [2023-11-06 22:47:52,690 INFO L136 LiptonReduction]: Total number of compositions: 74 [2023-11-06 22:47:52,707 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:47:52,714 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;@ee4b66f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:47:52,715 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 22:47:52,721 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:47:52,721 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-06 22:47:52,721 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:47:52,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:52,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:47:52,728 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 22:47:52,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:52,733 INFO L85 PathProgramCache]: Analyzing trace with hash -2058991977, now seen corresponding path program 1 times [2023-11-06 22:47:52,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:47:52,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268666903] [2023-11-06 22:47:52,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:52,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:47:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:53,436 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 22:47:53,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:47:53,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268666903] [2023-11-06 22:47:53,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268666903] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:47:53,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:47:53,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:47:53,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825794264] [2023-11-06 22:47:53,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:47:53,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:47:53,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:47:53,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:47:53,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:47:53,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 163 [2023-11-06 22:47:53,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:53,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:53,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 163 [2023-11-06 22:47:53,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:47:53,830 INFO L124 PetriNetUnfolderBase]: 98/184 cut-off events. [2023-11-06 22:47:53,830 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-11-06 22:47:53,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 184 events. 98/184 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 574 event pairs, 32 based on Foata normal form. 1/139 useless extension candidates. Maximal degree in co-relation 292. Up to 85 conditions per place. [2023-11-06 22:47:53,834 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 36 selfloop transitions, 10 changer transitions 5/51 dead transitions. [2023-11-06 22:47:53,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 51 transitions, 240 flow [2023-11-06 22:47:53,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:47:53,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:47:53,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 507 transitions. [2023-11-06 22:47:53,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44434706397896584 [2023-11-06 22:47:53,856 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 507 transitions. [2023-11-06 22:47:53,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 507 transitions. [2023-11-06 22:47:53,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:47:53,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 507 transitions. [2023-11-06 22:47:53,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 72.42857142857143) internal successors, (507), 7 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:53,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 163.0) internal successors, (1304), 8 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:53,877 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 163.0) internal successors, (1304), 8 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:53,879 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 7 states and 507 transitions. [2023-11-06 22:47:53,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 51 transitions, 240 flow [2023-11-06 22:47:53,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 51 transitions, 216 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:47:53,886 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 100 flow [2023-11-06 22:47:53,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=100, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2023-11-06 22:47:53,893 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-11-06 22:47:53,893 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 100 flow [2023-11-06 22:47:53,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:53,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:53,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:47:53,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:47:53,895 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 22:47:53,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:53,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1389925395, now seen corresponding path program 2 times [2023-11-06 22:47:53,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:47:53,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839039649] [2023-11-06 22:47:53,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:53,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:47:53,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:54,355 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 22:47:54,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:47:54,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839039649] [2023-11-06 22:47:54,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839039649] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:47:54,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:47:54,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:47:54,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125403679] [2023-11-06 22:47:54,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:47:54,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:47:54,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:47:54,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:47:54,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:47:54,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 163 [2023-11-06 22:47:54,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 100 flow. Second operand has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:54,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:54,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 163 [2023-11-06 22:47:54,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:47:54,678 INFO L124 PetriNetUnfolderBase]: 109/209 cut-off events. [2023-11-06 22:47:54,678 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2023-11-06 22:47:54,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 209 events. 109/209 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 714 event pairs, 12 based on Foata normal form. 1/210 useless extension candidates. Maximal degree in co-relation 613. Up to 125 conditions per place. [2023-11-06 22:47:54,682 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 42 selfloop transitions, 14 changer transitions 5/61 dead transitions. [2023-11-06 22:47:54,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 61 transitions, 354 flow [2023-11-06 22:47:54,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:47:54,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:47:54,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 509 transitions. [2023-11-06 22:47:54,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44609991235758106 [2023-11-06 22:47:54,687 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 509 transitions. [2023-11-06 22:47:54,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 509 transitions. [2023-11-06 22:47:54,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:47:54,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 509 transitions. [2023-11-06 22:47:54,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 72.71428571428571) internal successors, (509), 7 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:54,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 163.0) internal successors, (1304), 8 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:54,703 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 163.0) internal successors, (1304), 8 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:54,704 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 100 flow. Second operand 7 states and 509 transitions. [2023-11-06 22:47:54,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 61 transitions, 354 flow [2023-11-06 22:47:54,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 61 transitions, 338 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-11-06 22:47:54,711 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 191 flow [2023-11-06 22:47:54,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=191, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-11-06 22:47:54,713 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 16 predicate places. [2023-11-06 22:47:54,714 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 191 flow [2023-11-06 22:47:54,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:54,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:54,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:47:54,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:47:54,722 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 22:47:54,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:54,723 INFO L85 PathProgramCache]: Analyzing trace with hash 466382875, now seen corresponding path program 3 times [2023-11-06 22:47:54,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:47:54,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25314401] [2023-11-06 22:47:54,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:54,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:47:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:54,992 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 22:47:54,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:47:54,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25314401] [2023-11-06 22:47:54,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25314401] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:47:54,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:47:54,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:47:54,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082314496] [2023-11-06 22:47:54,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:47:54,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:47:54,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:47:54,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:47:54,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:47:55,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 163 [2023-11-06 22:47:55,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 191 flow. Second operand has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:55,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:55,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 163 [2023-11-06 22:47:55,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:47:55,272 INFO L124 PetriNetUnfolderBase]: 115/219 cut-off events. [2023-11-06 22:47:55,273 INFO L125 PetriNetUnfolderBase]: For 282/282 co-relation queries the response was YES. [2023-11-06 22:47:55,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 813 conditions, 219 events. 115/219 cut-off events. For 282/282 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 721 event pairs, 32 based on Foata normal form. 1/220 useless extension candidates. Maximal degree in co-relation 788. Up to 95 conditions per place. [2023-11-06 22:47:55,277 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 33 selfloop transitions, 21 changer transitions 5/59 dead transitions. [2023-11-06 22:47:55,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 59 transitions, 428 flow [2023-11-06 22:47:55,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:47:55,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:47:55,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 504 transitions. [2023-11-06 22:47:55,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44171779141104295 [2023-11-06 22:47:55,280 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 504 transitions. [2023-11-06 22:47:55,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 504 transitions. [2023-11-06 22:47:55,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:47:55,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 504 transitions. [2023-11-06 22:47:55,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 72.0) internal successors, (504), 7 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:55,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 163.0) internal successors, (1304), 8 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:55,287 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 163.0) internal successors, (1304), 8 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:55,287 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 191 flow. Second operand 7 states and 504 transitions. [2023-11-06 22:47:55,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 59 transitions, 428 flow [2023-11-06 22:47:55,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 59 transitions, 398 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-06 22:47:55,293 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 279 flow [2023-11-06 22:47:55,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=279, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-11-06 22:47:55,295 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 23 predicate places. [2023-11-06 22:47:55,295 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 279 flow [2023-11-06 22:47:55,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:55,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:55,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:47:55,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:47:55,296 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 22:47:55,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:55,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1649215017, now seen corresponding path program 4 times [2023-11-06 22:47:55,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:47:55,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281769178] [2023-11-06 22:47:55,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:55,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:47:55,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:55,530 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 22:47:55,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:47:55,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281769178] [2023-11-06 22:47:55,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281769178] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:47:55,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:47:55,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:47:55,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196441227] [2023-11-06 22:47:55,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:47:55,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:47:55,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:47:55,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:47:55,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:47:55,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 163 [2023-11-06 22:47:55,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 279 flow. Second operand has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:55,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:55,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 163 [2023-11-06 22:47:55,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:47:55,785 INFO L124 PetriNetUnfolderBase]: 129/247 cut-off events. [2023-11-06 22:47:55,785 INFO L125 PetriNetUnfolderBase]: For 486/486 co-relation queries the response was YES. [2023-11-06 22:47:55,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 986 conditions, 247 events. 129/247 cut-off events. For 486/486 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 895 event pairs, 24 based on Foata normal form. 1/248 useless extension candidates. Maximal degree in co-relation 955. Up to 155 conditions per place. [2023-11-06 22:47:55,788 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 35 selfloop transitions, 24 changer transitions 5/64 dead transitions. [2023-11-06 22:47:55,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 64 transitions, 532 flow [2023-11-06 22:47:55,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:47:55,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:47:55,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 502 transitions. [2023-11-06 22:47:55,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43996494303242767 [2023-11-06 22:47:55,792 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 502 transitions. [2023-11-06 22:47:55,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 502 transitions. [2023-11-06 22:47:55,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:47:55,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 502 transitions. [2023-11-06 22:47:55,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 71.71428571428571) internal successors, (502), 7 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:55,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 163.0) internal successors, (1304), 8 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:55,798 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 163.0) internal successors, (1304), 8 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:55,798 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 279 flow. Second operand 7 states and 502 transitions. [2023-11-06 22:47:55,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 64 transitions, 532 flow [2023-11-06 22:47:55,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 64 transitions, 496 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-06 22:47:55,804 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 390 flow [2023-11-06 22:47:55,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=390, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2023-11-06 22:47:55,805 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 28 predicate places. [2023-11-06 22:47:55,805 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 390 flow [2023-11-06 22:47:55,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:55,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:55,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:47:55,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:47:55,806 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 22:47:55,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:55,807 INFO L85 PathProgramCache]: Analyzing trace with hash 320635107, now seen corresponding path program 5 times [2023-11-06 22:47:55,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:47:55,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123779428] [2023-11-06 22:47:55,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:55,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:47:55,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:56,048 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 22:47:56,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:47:56,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123779428] [2023-11-06 22:47:56,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123779428] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:47:56,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:47:56,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:47:56,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990028876] [2023-11-06 22:47:56,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:47:56,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:47:56,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:47:56,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:47:56,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:47:56,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 163 [2023-11-06 22:47:56,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 390 flow. Second operand has 7 states, 7 states have (on average 67.85714285714286) internal successors, (475), 7 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:56,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:56,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 163 [2023-11-06 22:47:56,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:47:56,281 INFO L124 PetriNetUnfolderBase]: 66/142 cut-off events. [2023-11-06 22:47:56,282 INFO L125 PetriNetUnfolderBase]: For 502/502 co-relation queries the response was YES. [2023-11-06 22:47:56,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 142 events. 66/142 cut-off events. For 502/502 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 452 event pairs, 20 based on Foata normal form. 19/161 useless extension candidates. Maximal degree in co-relation 602. Up to 67 conditions per place. [2023-11-06 22:47:56,283 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 27 selfloop transitions, 13 changer transitions 11/51 dead transitions. [2023-11-06 22:47:56,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 51 transitions, 421 flow [2023-11-06 22:47:56,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:47:56,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:47:56,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 510 transitions. [2023-11-06 22:47:56,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4469763365468887 [2023-11-06 22:47:56,288 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 510 transitions. [2023-11-06 22:47:56,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 510 transitions. [2023-11-06 22:47:56,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:47:56,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 510 transitions. [2023-11-06 22:47:56,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 72.85714285714286) internal successors, (510), 7 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:56,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 163.0) internal successors, (1304), 8 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:56,294 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 163.0) internal successors, (1304), 8 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:56,295 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 390 flow. Second operand 7 states and 510 transitions. [2023-11-06 22:47:56,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 51 transitions, 421 flow [2023-11-06 22:47:56,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 363 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-11-06 22:47:56,300 INFO L231 Difference]: Finished difference. Result has 48 places, 29 transitions, 206 flow [2023-11-06 22:47:56,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=206, PETRI_PLACES=48, PETRI_TRANSITIONS=29} [2023-11-06 22:47:56,305 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 28 predicate places. [2023-11-06 22:47:56,305 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 29 transitions, 206 flow [2023-11-06 22:47:56,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 67.85714285714286) internal successors, (475), 7 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:56,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:56,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:47:56,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:47:56,306 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 22:47:56,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:56,306 INFO L85 PathProgramCache]: Analyzing trace with hash 494088505, now seen corresponding path program 6 times [2023-11-06 22:47:56,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:47:56,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025725060] [2023-11-06 22:47:56,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:56,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:47:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:56,545 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 22:47:56,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:47:56,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025725060] [2023-11-06 22:47:56,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025725060] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:47:56,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:47:56,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:47:56,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662229648] [2023-11-06 22:47:56,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:47:56,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:47:56,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:47:56,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:47:56,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:47:56,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 163 [2023-11-06 22:47:56,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 29 transitions, 206 flow. Second operand has 7 states, 7 states have (on average 67.85714285714286) internal successors, (475), 7 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:56,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:56,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 163 [2023-11-06 22:47:56,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:47:56,773 INFO L124 PetriNetUnfolderBase]: 56/112 cut-off events. [2023-11-06 22:47:56,774 INFO L125 PetriNetUnfolderBase]: For 254/254 co-relation queries the response was YES. [2023-11-06 22:47:56,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 470 conditions, 112 events. 56/112 cut-off events. For 254/254 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 292 event pairs, 15 based on Foata normal form. 1/113 useless extension candidates. Maximal degree in co-relation 449. Up to 67 conditions per place. [2023-11-06 22:47:56,775 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 20 selfloop transitions, 13 changer transitions 9/42 dead transitions. [2023-11-06 22:47:56,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 42 transitions, 331 flow [2023-11-06 22:47:56,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:47:56,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:47:56,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 499 transitions. [2023-11-06 22:47:56,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43733567046450483 [2023-11-06 22:47:56,778 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 499 transitions. [2023-11-06 22:47:56,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 499 transitions. [2023-11-06 22:47:56,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:47:56,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 499 transitions. [2023-11-06 22:47:56,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 71.28571428571429) internal successors, (499), 7 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:56,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 163.0) internal successors, (1304), 8 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:56,785 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 163.0) internal successors, (1304), 8 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:56,785 INFO L175 Difference]: Start difference. First operand has 48 places, 29 transitions, 206 flow. Second operand 7 states and 499 transitions. [2023-11-06 22:47:56,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 42 transitions, 331 flow [2023-11-06 22:47:56,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 284 flow, removed 6 selfloop flow, removed 11 redundant places. [2023-11-06 22:47:56,788 INFO L231 Difference]: Finished difference. Result has 41 places, 28 transitions, 182 flow [2023-11-06 22:47:56,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=182, PETRI_PLACES=41, PETRI_TRANSITIONS=28} [2023-11-06 22:47:56,789 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2023-11-06 22:47:56,790 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 28 transitions, 182 flow [2023-11-06 22:47:56,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 67.85714285714286) internal successors, (475), 7 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:56,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:56,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:47:56,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:47:56,791 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 22:47:56,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:56,791 INFO L85 PathProgramCache]: Analyzing trace with hash -828328183, now seen corresponding path program 1 times [2023-11-06 22:47:56,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:47:56,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203281586] [2023-11-06 22:47:56,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:56,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:47:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:47:56,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:47:56,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203281586] [2023-11-06 22:47:56,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203281586] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:47:56,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91894735] [2023-11-06 22:47:56,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:56,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:47:56,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:47:56,990 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:47:57,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:47:57,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:57,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:47:57,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:47:57,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:47:57,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:47:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:47:57,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91894735] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:47:57,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:47:57,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-06 22:47:57,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556039239] [2023-11-06 22:47:57,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:47:57,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:47:57,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:47:57,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:47:57,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:47:57,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:47:57,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 28 transitions, 182 flow. Second operand has 19 states, 19 states have (on average 65.0) internal successors, (1235), 19 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:57,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:57,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:47:57,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:47:58,380 INFO L124 PetriNetUnfolderBase]: 140/296 cut-off events. [2023-11-06 22:47:58,380 INFO L125 PetriNetUnfolderBase]: For 227/227 co-relation queries the response was YES. [2023-11-06 22:47:58,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 925 conditions, 296 events. 140/296 cut-off events. For 227/227 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1246 event pairs, 10 based on Foata normal form. 17/313 useless extension candidates. Maximal degree in co-relation 895. Up to 73 conditions per place. [2023-11-06 22:47:58,383 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 67 selfloop transitions, 24 changer transitions 25/116 dead transitions. [2023-11-06 22:47:58,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 116 transitions, 685 flow [2023-11-06 22:47:58,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:47:58,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:47:58,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1247 transitions. [2023-11-06 22:47:58,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42501704158145875 [2023-11-06 22:47:58,390 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1247 transitions. [2023-11-06 22:47:58,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1247 transitions. [2023-11-06 22:47:58,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:47:58,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1247 transitions. [2023-11-06 22:47:58,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 69.27777777777777) internal successors, (1247), 18 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:58,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 163.0) internal successors, (3097), 19 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:58,405 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 163.0) internal successors, (3097), 19 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:58,406 INFO L175 Difference]: Start difference. First operand has 41 places, 28 transitions, 182 flow. Second operand 18 states and 1247 transitions. [2023-11-06 22:47:58,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 116 transitions, 685 flow [2023-11-06 22:47:58,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 116 transitions, 647 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-11-06 22:47:58,412 INFO L231 Difference]: Finished difference. Result has 60 places, 42 transitions, 308 flow [2023-11-06 22:47:58,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=308, PETRI_PLACES=60, PETRI_TRANSITIONS=42} [2023-11-06 22:47:58,414 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 40 predicate places. [2023-11-06 22:47:58,414 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 42 transitions, 308 flow [2023-11-06 22:47:58,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.0) internal successors, (1235), 19 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:58,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:58,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:47:58,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:47:58,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:47:58,622 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 22:47:58,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:58,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1721482271, now seen corresponding path program 2 times [2023-11-06 22:47:58,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:47:58,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996081892] [2023-11-06 22:47:58,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:58,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:47:58,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:58,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:47:58,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:47:58,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996081892] [2023-11-06 22:47:58,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996081892] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:47:58,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568593556] [2023-11-06 22:47:58,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:47:58,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:47:58,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:47:58,838 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:47:58,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:47:58,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:47:58,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:47:58,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:47:58,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:47:59,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:47:59,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:47:59,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:47:59,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568593556] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:47:59,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:47:59,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-06 22:47:59,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888047936] [2023-11-06 22:47:59,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:47:59,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:47:59,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:47:59,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:47:59,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:47:59,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:47:59,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 42 transitions, 308 flow. Second operand has 19 states, 19 states have (on average 65.0) internal successors, (1235), 19 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:59,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:59,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:47:59,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:00,462 INFO L124 PetriNetUnfolderBase]: 182/396 cut-off events. [2023-11-06 22:48:00,462 INFO L125 PetriNetUnfolderBase]: For 1145/1145 co-relation queries the response was YES. [2023-11-06 22:48:00,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 396 events. 182/396 cut-off events. For 1145/1145 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1849 event pairs, 18 based on Foata normal form. 3/399 useless extension candidates. Maximal degree in co-relation 1607. Up to 127 conditions per place. [2023-11-06 22:48:00,468 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 84 selfloop transitions, 46 changer transitions 17/147 dead transitions. [2023-11-06 22:48:00,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 147 transitions, 1100 flow [2023-11-06 22:48:00,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 22:48:00,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-06 22:48:00,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1710 transitions. [2023-11-06 22:48:00,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4196319018404908 [2023-11-06 22:48:00,477 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1710 transitions. [2023-11-06 22:48:00,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1710 transitions. [2023-11-06 22:48:00,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:00,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1710 transitions. [2023-11-06 22:48:00,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 68.4) internal successors, (1710), 25 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:00,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 163.0) internal successors, (4238), 26 states have internal predecessors, (4238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:00,497 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 163.0) internal successors, (4238), 26 states have internal predecessors, (4238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:00,497 INFO L175 Difference]: Start difference. First operand has 60 places, 42 transitions, 308 flow. Second operand 25 states and 1710 transitions. [2023-11-06 22:48:00,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 147 transitions, 1100 flow [2023-11-06 22:48:00,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 147 transitions, 937 flow, removed 77 selfloop flow, removed 6 redundant places. [2023-11-06 22:48:00,509 INFO L231 Difference]: Finished difference. Result has 84 places, 65 transitions, 541 flow [2023-11-06 22:48:00,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=541, PETRI_PLACES=84, PETRI_TRANSITIONS=65} [2023-11-06 22:48:00,510 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 64 predicate places. [2023-11-06 22:48:00,510 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 65 transitions, 541 flow [2023-11-06 22:48:00,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.0) internal successors, (1235), 19 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:00,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:00,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:00,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:00,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 22:48:00,719 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 22:48:00,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:00,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1742528171, now seen corresponding path program 3 times [2023-11-06 22:48:00,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:00,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784918291] [2023-11-06 22:48:00,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:00,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:00,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:00,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:00,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784918291] [2023-11-06 22:48:00,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784918291] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:00,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409368678] [2023-11-06 22:48:00,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:48:00,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:00,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:00,951 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:00,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:48:01,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:48:01,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:01,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:48:01,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:01,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:01,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:01,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:01,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409368678] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:01,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:01,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-06 22:48:01,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111048994] [2023-11-06 22:48:01,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:01,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:48:01,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:01,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:48:01,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:48:01,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:01,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 65 transitions, 541 flow. Second operand has 19 states, 19 states have (on average 65.10526315789474) internal successors, (1237), 19 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:01,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:01,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:01,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:02,477 INFO L124 PetriNetUnfolderBase]: 180/377 cut-off events. [2023-11-06 22:48:02,477 INFO L125 PetriNetUnfolderBase]: For 1812/1812 co-relation queries the response was YES. [2023-11-06 22:48:02,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1816 conditions, 377 events. 180/377 cut-off events. For 1812/1812 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1671 event pairs, 22 based on Foata normal form. 4/381 useless extension candidates. Maximal degree in co-relation 1783. Up to 129 conditions per place. [2023-11-06 22:48:02,482 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 62 selfloop transitions, 39 changer transitions 34/135 dead transitions. [2023-11-06 22:48:02,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 135 transitions, 1090 flow [2023-11-06 22:48:02,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:48:02,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 22:48:02,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1508 transitions. [2023-11-06 22:48:02,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4205242610150586 [2023-11-06 22:48:02,514 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1508 transitions. [2023-11-06 22:48:02,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1508 transitions. [2023-11-06 22:48:02,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:02,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1508 transitions. [2023-11-06 22:48:02,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 68.54545454545455) internal successors, (1508), 22 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:02,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 163.0) internal successors, (3749), 23 states have internal predecessors, (3749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:02,531 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 163.0) internal successors, (3749), 23 states have internal predecessors, (3749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:02,531 INFO L175 Difference]: Start difference. First operand has 84 places, 65 transitions, 541 flow. Second operand 22 states and 1508 transitions. [2023-11-06 22:48:02,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 135 transitions, 1090 flow [2023-11-06 22:48:02,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 135 transitions, 984 flow, removed 31 selfloop flow, removed 9 redundant places. [2023-11-06 22:48:02,544 INFO L231 Difference]: Finished difference. Result has 97 places, 60 transitions, 506 flow [2023-11-06 22:48:02,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=506, PETRI_PLACES=97, PETRI_TRANSITIONS=60} [2023-11-06 22:48:02,546 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 77 predicate places. [2023-11-06 22:48:02,546 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 60 transitions, 506 flow [2023-11-06 22:48:02,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.10526315789474) internal successors, (1237), 19 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:02,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:02,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:02,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:02,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 22:48:02,754 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 22:48:02,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:02,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1428916439, now seen corresponding path program 4 times [2023-11-06 22:48:02,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:02,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742769287] [2023-11-06 22:48:02,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:02,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:02,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:02,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:02,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742769287] [2023-11-06 22:48:02,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742769287] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:02,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772410374] [2023-11-06 22:48:02,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:48:02,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:02,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:02,921 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:02,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:48:02,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:48:02,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:03,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:48:03,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:03,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:03,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772410374] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:03,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:03,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-06 22:48:03,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383199526] [2023-11-06 22:48:03,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:03,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:48:03,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:03,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:48:03,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:48:03,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:03,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 60 transitions, 506 flow. Second operand has 19 states, 19 states have (on average 65.0) internal successors, (1235), 19 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:03,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:03,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:03,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:03,883 INFO L124 PetriNetUnfolderBase]: 167/346 cut-off events. [2023-11-06 22:48:03,883 INFO L125 PetriNetUnfolderBase]: For 1956/1956 co-relation queries the response was YES. [2023-11-06 22:48:03,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1766 conditions, 346 events. 167/346 cut-off events. For 1956/1956 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1454 event pairs, 28 based on Foata normal form. 2/346 useless extension candidates. Maximal degree in co-relation 1730. Up to 268 conditions per place. [2023-11-06 22:48:03,888 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 55 selfloop transitions, 23 changer transitions 10/88 dead transitions. [2023-11-06 22:48:03,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 88 transitions, 787 flow [2023-11-06 22:48:03,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:48:03,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 22:48:03,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 880 transitions. [2023-11-06 22:48:03,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152902312411515 [2023-11-06 22:48:03,891 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 880 transitions. [2023-11-06 22:48:03,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 880 transitions. [2023-11-06 22:48:03,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:03,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 880 transitions. [2023-11-06 22:48:03,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 67.6923076923077) internal successors, (880), 13 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:03,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 163.0) internal successors, (2282), 14 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:03,900 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 163.0) internal successors, (2282), 14 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:03,901 INFO L175 Difference]: Start difference. First operand has 97 places, 60 transitions, 506 flow. Second operand 13 states and 880 transitions. [2023-11-06 22:48:03,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 88 transitions, 787 flow [2023-11-06 22:48:03,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 88 transitions, 706 flow, removed 11 selfloop flow, removed 16 redundant places. [2023-11-06 22:48:03,911 INFO L231 Difference]: Finished difference. Result has 84 places, 62 transitions, 509 flow [2023-11-06 22:48:03,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=509, PETRI_PLACES=84, PETRI_TRANSITIONS=62} [2023-11-06 22:48:03,913 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 64 predicate places. [2023-11-06 22:48:03,913 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 62 transitions, 509 flow [2023-11-06 22:48:03,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.0) internal successors, (1235), 19 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:03,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:03,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:03,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:04,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:48:04,121 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 22:48:04,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:04,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1908981957, now seen corresponding path program 5 times [2023-11-06 22:48:04,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:04,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091476016] [2023-11-06 22:48:04,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:04,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:04,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:04,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:04,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091476016] [2023-11-06 22:48:04,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091476016] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:04,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094477400] [2023-11-06 22:48:04,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:48:04,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:04,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:04,310 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:04,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:48:04,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:48:04,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:04,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:48:04,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:04,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:04,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:04,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:04,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094477400] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:04,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:04,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-06 22:48:04,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483700091] [2023-11-06 22:48:04,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:04,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:48:04,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:04,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:48:04,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:48:04,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:04,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 62 transitions, 509 flow. Second operand has 19 states, 19 states have (on average 65.0) internal successors, (1235), 19 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:04,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:04,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:04,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:05,305 INFO L124 PetriNetUnfolderBase]: 172/357 cut-off events. [2023-11-06 22:48:05,305 INFO L125 PetriNetUnfolderBase]: For 1146/1146 co-relation queries the response was YES. [2023-11-06 22:48:05,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1644 conditions, 357 events. 172/357 cut-off events. For 1146/1146 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1503 event pairs, 29 based on Foata normal form. 2/357 useless extension candidates. Maximal degree in co-relation 1611. Up to 299 conditions per place. [2023-11-06 22:48:05,311 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 59 selfloop transitions, 22 changer transitions 10/91 dead transitions. [2023-11-06 22:48:05,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 91 transitions, 818 flow [2023-11-06 22:48:05,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:48:05,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:48:05,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 940 transitions. [2023-11-06 22:48:05,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119193689745837 [2023-11-06 22:48:05,316 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 940 transitions. [2023-11-06 22:48:05,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 940 transitions. [2023-11-06 22:48:05,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:05,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 940 transitions. [2023-11-06 22:48:05,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 67.14285714285714) internal successors, (940), 14 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:05,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 163.0) internal successors, (2445), 15 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:05,334 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 163.0) internal successors, (2445), 15 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:05,334 INFO L175 Difference]: Start difference. First operand has 84 places, 62 transitions, 509 flow. Second operand 14 states and 940 transitions. [2023-11-06 22:48:05,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 91 transitions, 818 flow [2023-11-06 22:48:05,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 91 transitions, 742 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-11-06 22:48:05,345 INFO L231 Difference]: Finished difference. Result has 88 places, 69 transitions, 563 flow [2023-11-06 22:48:05,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=563, PETRI_PLACES=88, PETRI_TRANSITIONS=69} [2023-11-06 22:48:05,346 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 68 predicate places. [2023-11-06 22:48:05,346 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 69 transitions, 563 flow [2023-11-06 22:48:05,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.0) internal successors, (1235), 19 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:05,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:05,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:05,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:05,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:05,554 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 22:48:05,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:05,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1317592673, now seen corresponding path program 6 times [2023-11-06 22:48:05,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:05,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257140716] [2023-11-06 22:48:05,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:05,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:05,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:05,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:05,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:05,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257140716] [2023-11-06 22:48:05,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257140716] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:05,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574459256] [2023-11-06 22:48:05,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:48:05,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:05,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:05,714 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:05,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:48:05,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:48:05,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:05,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:48:05,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:05,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:05,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:06,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574459256] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:06,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:06,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-06 22:48:06,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734412105] [2023-11-06 22:48:06,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:06,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:48:06,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:06,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:48:06,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:48:06,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:06,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 69 transitions, 563 flow. Second operand has 19 states, 19 states have (on average 65.0) internal successors, (1235), 19 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:06,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:06,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:06,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:06,591 INFO L124 PetriNetUnfolderBase]: 171/358 cut-off events. [2023-11-06 22:48:06,591 INFO L125 PetriNetUnfolderBase]: For 1279/1279 co-relation queries the response was YES. [2023-11-06 22:48:06,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1690 conditions, 358 events. 171/358 cut-off events. For 1279/1279 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1530 event pairs, 35 based on Foata normal form. 2/358 useless extension candidates. Maximal degree in co-relation 1655. Up to 308 conditions per place. [2023-11-06 22:48:06,596 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 63 selfloop transitions, 15 changer transitions 11/89 dead transitions. [2023-11-06 22:48:06,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 89 transitions, 818 flow [2023-11-06 22:48:06,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:48:06,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:48:06,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 675 transitions. [2023-11-06 22:48:06,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41411042944785276 [2023-11-06 22:48:06,599 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 675 transitions. [2023-11-06 22:48:06,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 675 transitions. [2023-11-06 22:48:06,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:06,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 675 transitions. [2023-11-06 22:48:06,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 67.5) internal successors, (675), 10 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:06,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 163.0) internal successors, (1793), 11 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:06,605 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 163.0) internal successors, (1793), 11 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:06,605 INFO L175 Difference]: Start difference. First operand has 88 places, 69 transitions, 563 flow. Second operand 10 states and 675 transitions. [2023-11-06 22:48:06,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 89 transitions, 818 flow [2023-11-06 22:48:06,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 89 transitions, 779 flow, removed 8 selfloop flow, removed 8 redundant places. [2023-11-06 22:48:06,619 INFO L231 Difference]: Finished difference. Result has 91 places, 70 transitions, 578 flow [2023-11-06 22:48:06,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=578, PETRI_PLACES=91, PETRI_TRANSITIONS=70} [2023-11-06 22:48:06,622 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 71 predicate places. [2023-11-06 22:48:06,622 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 70 transitions, 578 flow [2023-11-06 22:48:06,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.0) internal successors, (1235), 19 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:06,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:06,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:06,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:06,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:06,835 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 22:48:06,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:06,835 INFO L85 PathProgramCache]: Analyzing trace with hash -989100375, now seen corresponding path program 7 times [2023-11-06 22:48:06,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:06,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957357831] [2023-11-06 22:48:06,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:06,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:06,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:07,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:07,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:07,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957357831] [2023-11-06 22:48:07,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957357831] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:07,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666023563] [2023-11-06 22:48:07,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:48:07,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:07,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:07,044 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:07,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:48:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:07,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:48:07,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:07,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:07,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666023563] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:07,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:07,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-06 22:48:07,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695128097] [2023-11-06 22:48:07,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:07,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:48:07,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:07,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:48:07,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:48:07,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:07,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 70 transitions, 578 flow. Second operand has 19 states, 19 states have (on average 65.05263157894737) internal successors, (1236), 19 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:07,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:07,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:07,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:08,431 INFO L124 PetriNetUnfolderBase]: 164/351 cut-off events. [2023-11-06 22:48:08,431 INFO L125 PetriNetUnfolderBase]: For 1343/1343 co-relation queries the response was YES. [2023-11-06 22:48:08,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1682 conditions, 351 events. 164/351 cut-off events. For 1343/1343 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1525 event pairs, 21 based on Foata normal form. 4/353 useless extension candidates. Maximal degree in co-relation 1644. Up to 217 conditions per place. [2023-11-06 22:48:08,436 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 64 selfloop transitions, 31 changer transitions 20/115 dead transitions. [2023-11-06 22:48:08,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 115 transitions, 1007 flow [2023-11-06 22:48:08,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:48:08,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 22:48:08,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1344 transitions. [2023-11-06 22:48:08,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41226993865030676 [2023-11-06 22:48:08,441 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1344 transitions. [2023-11-06 22:48:08,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1344 transitions. [2023-11-06 22:48:08,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:08,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1344 transitions. [2023-11-06 22:48:08,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 67.2) internal successors, (1344), 20 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:08,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 163.0) internal successors, (3423), 21 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:08,451 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 163.0) internal successors, (3423), 21 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:08,452 INFO L175 Difference]: Start difference. First operand has 91 places, 70 transitions, 578 flow. Second operand 20 states and 1344 transitions. [2023-11-06 22:48:08,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 115 transitions, 1007 flow [2023-11-06 22:48:08,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 115 transitions, 967 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-11-06 22:48:08,463 INFO L231 Difference]: Finished difference. Result has 107 places, 73 transitions, 680 flow [2023-11-06 22:48:08,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=680, PETRI_PLACES=107, PETRI_TRANSITIONS=73} [2023-11-06 22:48:08,464 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 87 predicate places. [2023-11-06 22:48:08,464 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 73 transitions, 680 flow [2023-11-06 22:48:08,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.05263157894737) internal successors, (1236), 19 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:08,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:08,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:08,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:08,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:08,672 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 22:48:08,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:08,672 INFO L85 PathProgramCache]: Analyzing trace with hash -969438315, now seen corresponding path program 8 times [2023-11-06 22:48:08,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:08,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036584846] [2023-11-06 22:48:08,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:08,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:08,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:08,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:08,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:08,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036584846] [2023-11-06 22:48:08,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036584846] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:08,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391459814] [2023-11-06 22:48:08,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:48:08,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:08,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:08,878 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:08,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:48:08,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:48:08,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:08,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:48:08,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:09,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:09,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:09,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391459814] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:09,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:09,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-06 22:48:09,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262541930] [2023-11-06 22:48:09,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:09,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:48:09,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:09,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:48:09,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:48:09,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:09,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 73 transitions, 680 flow. Second operand has 19 states, 19 states have (on average 65.0) internal successors, (1235), 19 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:09,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:09,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:09,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:10,174 INFO L124 PetriNetUnfolderBase]: 148/304 cut-off events. [2023-11-06 22:48:10,175 INFO L125 PetriNetUnfolderBase]: For 1704/1704 co-relation queries the response was YES. [2023-11-06 22:48:10,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1624 conditions, 304 events. 148/304 cut-off events. For 1704/1704 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1204 event pairs, 21 based on Foata normal form. 3/305 useless extension candidates. Maximal degree in co-relation 1569. Up to 217 conditions per place. [2023-11-06 22:48:10,179 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 59 selfloop transitions, 29 changer transitions 18/106 dead transitions. [2023-11-06 22:48:10,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 106 transitions, 1033 flow [2023-11-06 22:48:10,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:48:10,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:48:10,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1146 transitions. [2023-11-06 22:48:10,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4135691086250451 [2023-11-06 22:48:10,182 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1146 transitions. [2023-11-06 22:48:10,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1146 transitions. [2023-11-06 22:48:10,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:10,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1146 transitions. [2023-11-06 22:48:10,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.41176470588235) internal successors, (1146), 17 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:10,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 163.0) internal successors, (2934), 18 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:10,190 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 163.0) internal successors, (2934), 18 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:10,190 INFO L175 Difference]: Start difference. First operand has 107 places, 73 transitions, 680 flow. Second operand 17 states and 1146 transitions. [2023-11-06 22:48:10,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 106 transitions, 1033 flow [2023-11-06 22:48:10,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 106 transitions, 918 flow, removed 30 selfloop flow, removed 13 redundant places. [2023-11-06 22:48:10,204 INFO L231 Difference]: Finished difference. Result has 100 places, 72 transitions, 663 flow [2023-11-06 22:48:10,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=663, PETRI_PLACES=100, PETRI_TRANSITIONS=72} [2023-11-06 22:48:10,205 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 80 predicate places. [2023-11-06 22:48:10,205 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 72 transitions, 663 flow [2023-11-06 22:48:10,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.0) internal successors, (1235), 19 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:10,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:10,206 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:10,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:10,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:10,416 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 22:48:10,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:10,417 INFO L85 PathProgramCache]: Analyzing trace with hash 70286207, now seen corresponding path program 1 times [2023-11-06 22:48:10,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:10,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682903944] [2023-11-06 22:48:10,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:10,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:10,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:10,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:10,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682903944] [2023-11-06 22:48:10,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682903944] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:10,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601659496] [2023-11-06 22:48:10,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:10,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:10,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:10,654 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:10,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:48:10,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:10,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:48:10,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:10,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:11,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601659496] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:11,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:11,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-06 22:48:11,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593874698] [2023-11-06 22:48:11,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:11,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:48:11,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:11,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:48:11,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:48:11,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:11,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 72 transitions, 663 flow. Second operand has 19 states, 19 states have (on average 64.89473684210526) internal successors, (1233), 19 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:11,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:11,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:11,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:11,736 INFO L124 PetriNetUnfolderBase]: 181/363 cut-off events. [2023-11-06 22:48:11,736 INFO L125 PetriNetUnfolderBase]: For 2145/2145 co-relation queries the response was YES. [2023-11-06 22:48:11,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1899 conditions, 363 events. 181/363 cut-off events. For 2145/2145 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1503 event pairs, 14 based on Foata normal form. 7/368 useless extension candidates. Maximal degree in co-relation 1844. Up to 103 conditions per place. [2023-11-06 22:48:11,742 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 58 selfloop transitions, 45 changer transitions 35/138 dead transitions. [2023-11-06 22:48:11,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 138 transitions, 1233 flow [2023-11-06 22:48:11,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:48:11,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:48:11,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1174 transitions. [2023-11-06 22:48:11,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42367376398412127 [2023-11-06 22:48:11,746 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1174 transitions. [2023-11-06 22:48:11,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1174 transitions. [2023-11-06 22:48:11,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:11,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1174 transitions. [2023-11-06 22:48:11,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 69.05882352941177) internal successors, (1174), 17 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:11,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 163.0) internal successors, (2934), 18 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:11,754 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 163.0) internal successors, (2934), 18 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:11,754 INFO L175 Difference]: Start difference. First operand has 100 places, 72 transitions, 663 flow. Second operand 17 states and 1174 transitions. [2023-11-06 22:48:11,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 138 transitions, 1233 flow [2023-11-06 22:48:11,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 138 transitions, 1094 flow, removed 49 selfloop flow, removed 13 redundant places. [2023-11-06 22:48:11,769 INFO L231 Difference]: Finished difference. Result has 107 places, 74 transitions, 714 flow [2023-11-06 22:48:11,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=714, PETRI_PLACES=107, PETRI_TRANSITIONS=74} [2023-11-06 22:48:11,770 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 87 predicate places. [2023-11-06 22:48:11,770 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 74 transitions, 714 flow [2023-11-06 22:48:11,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.89473684210526) internal successors, (1233), 19 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:11,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:11,771 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:11,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:11,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:11,978 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 22:48:11,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:11,978 INFO L85 PathProgramCache]: Analyzing trace with hash 608310945, now seen corresponding path program 9 times [2023-11-06 22:48:11,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:11,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24838118] [2023-11-06 22:48:11,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:11,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:12,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:12,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24838118] [2023-11-06 22:48:12,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24838118] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:12,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504145899] [2023-11-06 22:48:12,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:48:12,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:12,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:12,240 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:12,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:48:12,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:48:12,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:12,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:48:12,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:12,577 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:12,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504145899] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:12,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:12,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-06 22:48:12,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026901477] [2023-11-06 22:48:12,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:12,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:48:12,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:12,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:48:12,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:48:13,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:13,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 74 transitions, 714 flow. Second operand has 24 states, 24 states have (on average 64.83333333333333) internal successors, (1556), 24 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:13,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:13,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:13,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:14,918 INFO L124 PetriNetUnfolderBase]: 353/684 cut-off events. [2023-11-06 22:48:14,918 INFO L125 PetriNetUnfolderBase]: For 5935/5935 co-relation queries the response was YES. [2023-11-06 22:48:14,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3827 conditions, 684 events. 353/684 cut-off events. For 5935/5935 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3286 event pairs, 12 based on Foata normal form. 4/688 useless extension candidates. Maximal degree in co-relation 3716. Up to 193 conditions per place. [2023-11-06 22:48:14,929 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 125 selfloop transitions, 114 changer transitions 16/255 dead transitions. [2023-11-06 22:48:14,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 255 transitions, 2456 flow [2023-11-06 22:48:14,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-06 22:48:14,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-06 22:48:14,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3188 transitions. [2023-11-06 22:48:14,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.416133664012531 [2023-11-06 22:48:14,943 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3188 transitions. [2023-11-06 22:48:14,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3188 transitions. [2023-11-06 22:48:14,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:14,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3188 transitions. [2023-11-06 22:48:14,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 67.82978723404256) internal successors, (3188), 47 states have internal predecessors, (3188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:14,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 163.0) internal successors, (7824), 48 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:14,966 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 163.0) internal successors, (7824), 48 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:14,967 INFO L175 Difference]: Start difference. First operand has 107 places, 74 transitions, 714 flow. Second operand 47 states and 3188 transitions. [2023-11-06 22:48:14,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 255 transitions, 2456 flow [2023-11-06 22:48:14,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 255 transitions, 2045 flow, removed 168 selfloop flow, removed 15 redundant places. [2023-11-06 22:48:14,993 INFO L231 Difference]: Finished difference. Result has 146 places, 138 transitions, 1466 flow [2023-11-06 22:48:14,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=1466, PETRI_PLACES=146, PETRI_TRANSITIONS=138} [2023-11-06 22:48:14,994 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 126 predicate places. [2023-11-06 22:48:14,994 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 138 transitions, 1466 flow [2023-11-06 22:48:14,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 64.83333333333333) internal successors, (1556), 24 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:14,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:14,995 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:15,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:15,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:15,202 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 22:48:15,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:15,202 INFO L85 PathProgramCache]: Analyzing trace with hash 153524521, now seen corresponding path program 10 times [2023-11-06 22:48:15,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:15,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337233102] [2023-11-06 22:48:15,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:15,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:15,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:15,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:15,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337233102] [2023-11-06 22:48:15,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337233102] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:15,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753277496] [2023-11-06 22:48:15,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:48:15,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:15,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:15,470 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:15,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:48:15,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:48:15,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:15,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:48:15,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:15,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:15,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:16,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753277496] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:16,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:16,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-06 22:48:16,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809144109] [2023-11-06 22:48:16,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:16,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:48:16,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:16,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:48:16,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:48:16,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:16,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 138 transitions, 1466 flow. Second operand has 24 states, 24 states have (on average 64.91666666666667) internal successors, (1558), 24 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:16,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:16,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:16,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:17,335 INFO L124 PetriNetUnfolderBase]: 414/828 cut-off events. [2023-11-06 22:48:17,335 INFO L125 PetriNetUnfolderBase]: For 9708/9708 co-relation queries the response was YES. [2023-11-06 22:48:17,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5094 conditions, 828 events. 414/828 cut-off events. For 9708/9708 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4303 event pairs, 42 based on Foata normal form. 3/831 useless extension candidates. Maximal degree in co-relation 4925. Up to 301 conditions per place. [2023-11-06 22:48:17,347 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 126 selfloop transitions, 81 changer transitions 33/240 dead transitions. [2023-11-06 22:48:17,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 240 transitions, 2611 flow [2023-11-06 22:48:17,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:48:17,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 22:48:17,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1592 transitions. [2023-11-06 22:48:17,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246465724193118 [2023-11-06 22:48:17,351 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1592 transitions. [2023-11-06 22:48:17,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1592 transitions. [2023-11-06 22:48:17,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:17,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1592 transitions. [2023-11-06 22:48:17,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 69.21739130434783) internal successors, (1592), 23 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:17,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 163.0) internal successors, (3912), 24 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:17,362 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 163.0) internal successors, (3912), 24 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:17,362 INFO L175 Difference]: Start difference. First operand has 146 places, 138 transitions, 1466 flow. Second operand 23 states and 1592 transitions. [2023-11-06 22:48:17,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 240 transitions, 2611 flow [2023-11-06 22:48:17,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 240 transitions, 1988 flow, removed 234 selfloop flow, removed 23 redundant places. [2023-11-06 22:48:17,409 INFO L231 Difference]: Finished difference. Result has 143 places, 148 transitions, 1168 flow [2023-11-06 22:48:17,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1168, PETRI_PLACES=143, PETRI_TRANSITIONS=148} [2023-11-06 22:48:17,410 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 123 predicate places. [2023-11-06 22:48:17,410 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 148 transitions, 1168 flow [2023-11-06 22:48:17,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 64.91666666666667) internal successors, (1558), 24 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:17,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:17,411 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:17,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:17,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:48:17,617 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 22:48:17,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:17,617 INFO L85 PathProgramCache]: Analyzing trace with hash 588648885, now seen corresponding path program 11 times [2023-11-06 22:48:17,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:17,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003221923] [2023-11-06 22:48:17,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:17,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:17,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:17,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003221923] [2023-11-06 22:48:17,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003221923] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:17,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973518206] [2023-11-06 22:48:17,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:48:17,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:17,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:17,849 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:17,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:48:17,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:48:17,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:17,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:48:17,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:18,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:18,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973518206] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:18,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:18,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-06 22:48:18,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312455420] [2023-11-06 22:48:18,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:18,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:48:18,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:18,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:48:18,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:48:18,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:18,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 148 transitions, 1168 flow. Second operand has 24 states, 24 states have (on average 64.875) internal successors, (1557), 24 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:18,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:18,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:18,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:20,535 INFO L124 PetriNetUnfolderBase]: 403/797 cut-off events. [2023-11-06 22:48:20,535 INFO L125 PetriNetUnfolderBase]: For 7882/7882 co-relation queries the response was YES. [2023-11-06 22:48:20,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4278 conditions, 797 events. 403/797 cut-off events. For 7882/7882 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4042 event pairs, 18 based on Foata normal form. 5/800 useless extension candidates. Maximal degree in co-relation 4130. Up to 183 conditions per place. [2023-11-06 22:48:20,546 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 116 selfloop transitions, 115 changer transitions 25/256 dead transitions. [2023-11-06 22:48:20,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 256 transitions, 2254 flow [2023-11-06 22:48:20,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-06 22:48:20,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-06 22:48:20,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2798 transitions. [2023-11-06 22:48:20,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186742480921742 [2023-11-06 22:48:20,553 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2798 transitions. [2023-11-06 22:48:20,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2798 transitions. [2023-11-06 22:48:20,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:20,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2798 transitions. [2023-11-06 22:48:20,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 68.2439024390244) internal successors, (2798), 41 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:20,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 163.0) internal successors, (6846), 42 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:20,575 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 163.0) internal successors, (6846), 42 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:20,575 INFO L175 Difference]: Start difference. First operand has 143 places, 148 transitions, 1168 flow. Second operand 41 states and 2798 transitions. [2023-11-06 22:48:20,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 256 transitions, 2254 flow [2023-11-06 22:48:20,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 256 transitions, 2096 flow, removed 21 selfloop flow, removed 9 redundant places. [2023-11-06 22:48:20,603 INFO L231 Difference]: Finished difference. Result has 166 places, 143 transitions, 1239 flow [2023-11-06 22:48:20,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=1239, PETRI_PLACES=166, PETRI_TRANSITIONS=143} [2023-11-06 22:48:20,605 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 146 predicate places. [2023-11-06 22:48:20,605 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 143 transitions, 1239 flow [2023-11-06 22:48:20,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 64.875) internal successors, (1557), 24 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:20,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:20,606 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:20,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:20,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:48:20,812 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 22:48:20,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:20,813 INFO L85 PathProgramCache]: Analyzing trace with hash 900876777, now seen corresponding path program 12 times [2023-11-06 22:48:20,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:20,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107505713] [2023-11-06 22:48:20,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:20,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:20,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:21,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:21,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:21,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107505713] [2023-11-06 22:48:21,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107505713] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:21,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574832362] [2023-11-06 22:48:21,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:48:21,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:21,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:21,027 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:21,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:48:21,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:48:21,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:21,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:48:21,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:21,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:21,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574832362] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:21,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:21,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-06 22:48:21,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958847942] [2023-11-06 22:48:21,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:21,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:48:21,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:21,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:48:21,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:48:21,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:21,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 143 transitions, 1239 flow. Second operand has 24 states, 24 states have (on average 64.83333333333333) internal successors, (1556), 24 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:21,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:21,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:21,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:22,921 INFO L124 PetriNetUnfolderBase]: 452/886 cut-off events. [2023-11-06 22:48:22,921 INFO L125 PetriNetUnfolderBase]: For 8806/8806 co-relation queries the response was YES. [2023-11-06 22:48:22,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4981 conditions, 886 events. 452/886 cut-off events. For 8806/8806 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4581 event pairs, 48 based on Foata normal form. 5/887 useless extension candidates. Maximal degree in co-relation 4835. Up to 476 conditions per place. [2023-11-06 22:48:22,933 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 92 selfloop transitions, 89 changer transitions 46/227 dead transitions. [2023-11-06 22:48:22,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 227 transitions, 2175 flow [2023-11-06 22:48:22,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 22:48:22,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-06 22:48:22,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2157 transitions. [2023-11-06 22:48:22,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4135352760736196 [2023-11-06 22:48:22,938 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2157 transitions. [2023-11-06 22:48:22,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2157 transitions. [2023-11-06 22:48:22,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:22,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2157 transitions. [2023-11-06 22:48:22,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 67.40625) internal successors, (2157), 32 states have internal predecessors, (2157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:22,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 163.0) internal successors, (5379), 33 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:22,952 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 163.0) internal successors, (5379), 33 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:22,952 INFO L175 Difference]: Start difference. First operand has 166 places, 143 transitions, 1239 flow. Second operand 32 states and 2157 transitions. [2023-11-06 22:48:22,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 227 transitions, 2175 flow [2023-11-06 22:48:22,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 227 transitions, 1917 flow, removed 9 selfloop flow, removed 34 redundant places. [2023-11-06 22:48:22,982 INFO L231 Difference]: Finished difference. Result has 164 places, 145 transitions, 1288 flow [2023-11-06 22:48:22,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=1018, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1288, PETRI_PLACES=164, PETRI_TRANSITIONS=145} [2023-11-06 22:48:22,983 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 144 predicate places. [2023-11-06 22:48:22,983 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 145 transitions, 1288 flow [2023-11-06 22:48:22,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 64.83333333333333) internal successors, (1556), 24 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:22,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:22,984 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:22,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:23,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:23,191 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 22:48:23,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:23,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1672940333, now seen corresponding path program 2 times [2023-11-06 22:48:23,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:23,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442258170] [2023-11-06 22:48:23,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:23,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:23,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:23,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:23,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:23,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442258170] [2023-11-06 22:48:23,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442258170] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:23,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701931778] [2023-11-06 22:48:23,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:48:23,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:23,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:23,404 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:23,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:48:23,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:48:23,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:23,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:48:23,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:23,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:23,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:23,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701931778] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:23,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:23,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-06 22:48:23,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435835008] [2023-11-06 22:48:23,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:23,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:48:23,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:23,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:48:23,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:48:24,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:24,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 145 transitions, 1288 flow. Second operand has 20 states, 20 states have (on average 64.65) internal successors, (1293), 20 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:24,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:24,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:24,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:24,710 INFO L124 PetriNetUnfolderBase]: 576/1074 cut-off events. [2023-11-06 22:48:24,711 INFO L125 PetriNetUnfolderBase]: For 12143/12143 co-relation queries the response was YES. [2023-11-06 22:48:24,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6274 conditions, 1074 events. 576/1074 cut-off events. For 12143/12143 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5605 event pairs, 34 based on Foata normal form. 9/1079 useless extension candidates. Maximal degree in co-relation 6221. Up to 587 conditions per place. [2023-11-06 22:48:24,725 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 126 selfloop transitions, 80 changer transitions 53/259 dead transitions. [2023-11-06 22:48:24,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 259 transitions, 2559 flow [2023-11-06 22:48:24,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:48:24,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 22:48:24,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1504 transitions. [2023-11-06 22:48:24,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4194088120468489 [2023-11-06 22:48:24,729 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1504 transitions. [2023-11-06 22:48:24,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1504 transitions. [2023-11-06 22:48:24,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:24,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1504 transitions. [2023-11-06 22:48:24,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 68.36363636363636) internal successors, (1504), 22 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:24,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 163.0) internal successors, (3749), 23 states have internal predecessors, (3749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:24,738 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 163.0) internal successors, (3749), 23 states have internal predecessors, (3749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:24,738 INFO L175 Difference]: Start difference. First operand has 164 places, 145 transitions, 1288 flow. Second operand 22 states and 1504 transitions. [2023-11-06 22:48:24,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 259 transitions, 2559 flow [2023-11-06 22:48:24,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 259 transitions, 2383 flow, removed 35 selfloop flow, removed 18 redundant places. [2023-11-06 22:48:24,778 INFO L231 Difference]: Finished difference. Result has 155 places, 168 transitions, 1594 flow [2023-11-06 22:48:24,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1594, PETRI_PLACES=155, PETRI_TRANSITIONS=168} [2023-11-06 22:48:24,779 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 135 predicate places. [2023-11-06 22:48:24,780 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 168 transitions, 1594 flow [2023-11-06 22:48:24,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 64.65) internal successors, (1293), 20 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:24,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:24,780 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:24,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-06 22:48:24,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:24,987 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 22:48:24,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:24,987 INFO L85 PathProgramCache]: Analyzing trace with hash 408038403, now seen corresponding path program 3 times [2023-11-06 22:48:24,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:24,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979806506] [2023-11-06 22:48:24,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:24,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:25,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:25,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979806506] [2023-11-06 22:48:25,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979806506] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:25,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360487967] [2023-11-06 22:48:25,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:48:25,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:25,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:25,199 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:25,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:48:25,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:48:25,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:25,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:48:25,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:25,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:25,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:25,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360487967] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:25,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:25,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-11-06 22:48:25,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998552498] [2023-11-06 22:48:25,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:25,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:48:25,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:25,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:48:25,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:48:25,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:25,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 168 transitions, 1594 flow. Second operand has 24 states, 24 states have (on average 64.625) internal successors, (1551), 24 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:25,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:25,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:25,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:26,574 INFO L124 PetriNetUnfolderBase]: 526/1001 cut-off events. [2023-11-06 22:48:26,574 INFO L125 PetriNetUnfolderBase]: For 20704/20704 co-relation queries the response was YES. [2023-11-06 22:48:26,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6713 conditions, 1001 events. 526/1001 cut-off events. For 20704/20704 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5174 event pairs, 64 based on Foata normal form. 8/1009 useless extension candidates. Maximal degree in co-relation 6565. Up to 829 conditions per place. [2023-11-06 22:48:26,585 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 174 selfloop transitions, 44 changer transitions 10/228 dead transitions. [2023-11-06 22:48:26,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 228 transitions, 2472 flow [2023-11-06 22:48:26,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:48:26,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 22:48:26,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1419 transitions. [2023-11-06 22:48:26,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4145486415425066 [2023-11-06 22:48:26,600 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1419 transitions. [2023-11-06 22:48:26,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1419 transitions. [2023-11-06 22:48:26,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:26,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1419 transitions. [2023-11-06 22:48:26,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 67.57142857142857) internal successors, (1419), 21 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:26,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 163.0) internal successors, (3586), 22 states have internal predecessors, (3586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:26,611 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 163.0) internal successors, (3586), 22 states have internal predecessors, (3586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:26,611 INFO L175 Difference]: Start difference. First operand has 155 places, 168 transitions, 1594 flow. Second operand 21 states and 1419 transitions. [2023-11-06 22:48:26,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 228 transitions, 2472 flow [2023-11-06 22:48:26,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 228 transitions, 2280 flow, removed 57 selfloop flow, removed 10 redundant places. [2023-11-06 22:48:26,664 INFO L231 Difference]: Finished difference. Result has 163 places, 181 transitions, 1744 flow [2023-11-06 22:48:26,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=1439, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1744, PETRI_PLACES=163, PETRI_TRANSITIONS=181} [2023-11-06 22:48:26,664 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 143 predicate places. [2023-11-06 22:48:26,665 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 181 transitions, 1744 flow [2023-11-06 22:48:26,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 64.625) internal successors, (1551), 24 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:26,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:26,665 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:26,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:26,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:26,871 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 22:48:26,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:26,872 INFO L85 PathProgramCache]: Analyzing trace with hash 380332773, now seen corresponding path program 4 times [2023-11-06 22:48:26,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:26,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038862557] [2023-11-06 22:48:26,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:26,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:27,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:27,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038862557] [2023-11-06 22:48:27,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038862557] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:27,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503272380] [2023-11-06 22:48:27,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:48:27,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:27,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:27,092 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:27,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:48:27,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:48:27,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:27,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:48:27,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:27,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:27,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:27,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503272380] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:27,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:27,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-11-06 22:48:27,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630317631] [2023-11-06 22:48:27,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:27,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:48:27,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:27,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:48:27,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:48:27,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:27,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 181 transitions, 1744 flow. Second operand has 23 states, 23 states have (on average 64.69565217391305) internal successors, (1488), 23 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:27,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:27,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:27,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:28,677 INFO L124 PetriNetUnfolderBase]: 582/1165 cut-off events. [2023-11-06 22:48:28,677 INFO L125 PetriNetUnfolderBase]: For 20932/20932 co-relation queries the response was YES. [2023-11-06 22:48:28,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7062 conditions, 1165 events. 582/1165 cut-off events. For 20932/20932 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6633 event pairs, 38 based on Foata normal form. 6/1171 useless extension candidates. Maximal degree in co-relation 6801. Up to 480 conditions per place. [2023-11-06 22:48:28,690 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 148 selfloop transitions, 148 changer transitions 25/321 dead transitions. [2023-11-06 22:48:28,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 321 transitions, 3385 flow [2023-11-06 22:48:28,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 22:48:28,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 22:48:28,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2025 transitions. [2023-11-06 22:48:28,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41411042944785276 [2023-11-06 22:48:28,694 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2025 transitions. [2023-11-06 22:48:28,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2025 transitions. [2023-11-06 22:48:28,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:28,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2025 transitions. [2023-11-06 22:48:28,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 67.5) internal successors, (2025), 30 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:28,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 163.0) internal successors, (5053), 31 states have internal predecessors, (5053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:28,704 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 163.0) internal successors, (5053), 31 states have internal predecessors, (5053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:28,704 INFO L175 Difference]: Start difference. First operand has 163 places, 181 transitions, 1744 flow. Second operand 30 states and 2025 transitions. [2023-11-06 22:48:28,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 321 transitions, 3385 flow [2023-11-06 22:48:28,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 321 transitions, 3226 flow, removed 58 selfloop flow, removed 8 redundant places. [2023-11-06 22:48:28,758 INFO L231 Difference]: Finished difference. Result has 186 places, 232 transitions, 2598 flow [2023-11-06 22:48:28,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=1584, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2598, PETRI_PLACES=186, PETRI_TRANSITIONS=232} [2023-11-06 22:48:28,759 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 166 predicate places. [2023-11-06 22:48:28,759 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 232 transitions, 2598 flow [2023-11-06 22:48:28,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 64.69565217391305) internal successors, (1488), 23 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:28,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:28,760 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:28,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:28,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:28,966 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 22:48:28,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:28,966 INFO L85 PathProgramCache]: Analyzing trace with hash 260701037, now seen corresponding path program 5 times [2023-11-06 22:48:28,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:28,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329341442] [2023-11-06 22:48:28,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:28,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:28,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:29,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:29,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:29,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329341442] [2023-11-06 22:48:29,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329341442] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:29,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550818271] [2023-11-06 22:48:29,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:48:29,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:29,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:29,140 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:29,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:48:29,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:48:29,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:29,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:48:29,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:29,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:29,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550818271] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:29,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:29,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-06 22:48:29,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106817024] [2023-11-06 22:48:29,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:29,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:48:29,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:29,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:48:29,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:48:29,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:29,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 232 transitions, 2598 flow. Second operand has 20 states, 20 states have (on average 64.6) internal successors, (1292), 20 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:29,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:29,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:29,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:30,363 INFO L124 PetriNetUnfolderBase]: 654/1269 cut-off events. [2023-11-06 22:48:30,364 INFO L125 PetriNetUnfolderBase]: For 24925/24925 co-relation queries the response was YES. [2023-11-06 22:48:30,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8313 conditions, 1269 events. 654/1269 cut-off events. For 24925/24925 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7211 event pairs, 27 based on Foata normal form. 10/1279 useless extension candidates. Maximal degree in co-relation 8163. Up to 625 conditions per place. [2023-11-06 22:48:30,374 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 174 selfloop transitions, 92 changer transitions 60/326 dead transitions. [2023-11-06 22:48:30,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 326 transitions, 3956 flow [2023-11-06 22:48:30,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:48:30,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 22:48:30,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1492 transitions. [2023-11-06 22:48:30,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41606246514221973 [2023-11-06 22:48:30,377 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1492 transitions. [2023-11-06 22:48:30,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1492 transitions. [2023-11-06 22:48:30,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:30,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1492 transitions. [2023-11-06 22:48:30,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 67.81818181818181) internal successors, (1492), 22 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:30,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 163.0) internal successors, (3749), 23 states have internal predecessors, (3749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:30,384 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 163.0) internal successors, (3749), 23 states have internal predecessors, (3749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:30,384 INFO L175 Difference]: Start difference. First operand has 186 places, 232 transitions, 2598 flow. Second operand 22 states and 1492 transitions. [2023-11-06 22:48:30,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 326 transitions, 3956 flow [2023-11-06 22:48:30,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 326 transitions, 3257 flow, removed 274 selfloop flow, removed 20 redundant places. [2023-11-06 22:48:30,505 INFO L231 Difference]: Finished difference. Result has 194 places, 232 transitions, 2298 flow [2023-11-06 22:48:30,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2016, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2298, PETRI_PLACES=194, PETRI_TRANSITIONS=232} [2023-11-06 22:48:30,506 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 174 predicate places. [2023-11-06 22:48:30,506 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 232 transitions, 2298 flow [2023-11-06 22:48:30,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 64.6) internal successors, (1292), 20 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:30,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:30,507 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:30,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:30,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-06 22:48:30,707 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 22:48:30,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:30,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1551805563, now seen corresponding path program 13 times [2023-11-06 22:48:30,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:30,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411417811] [2023-11-06 22:48:30,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:30,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:30,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:30,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411417811] [2023-11-06 22:48:30,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411417811] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:30,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397031527] [2023-11-06 22:48:30,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:48:30,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:30,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:30,886 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:30,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:48:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:30,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:48:30,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:31,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:31,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:31,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397031527] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:31,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:31,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-06 22:48:31,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425541745] [2023-11-06 22:48:31,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:31,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:48:31,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:31,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:48:31,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:48:31,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:31,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 232 transitions, 2298 flow. Second operand has 24 states, 24 states have (on average 64.83333333333333) internal successors, (1556), 24 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:31,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:31,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:31,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:32,305 INFO L124 PetriNetUnfolderBase]: 565/1124 cut-off events. [2023-11-06 22:48:32,305 INFO L125 PetriNetUnfolderBase]: For 6148/6148 co-relation queries the response was YES. [2023-11-06 22:48:32,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5981 conditions, 1124 events. 565/1124 cut-off events. For 6148/6148 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6270 event pairs, 31 based on Foata normal form. 4/1128 useless extension candidates. Maximal degree in co-relation 5813. Up to 1039 conditions per place. [2023-11-06 22:48:32,313 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 225 selfloop transitions, 18 changer transitions 29/272 dead transitions. [2023-11-06 22:48:32,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 272 transitions, 3000 flow [2023-11-06 22:48:32,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:48:32,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 22:48:32,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1398 transitions. [2023-11-06 22:48:32,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4084136722173532 [2023-11-06 22:48:32,318 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1398 transitions. [2023-11-06 22:48:32,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1398 transitions. [2023-11-06 22:48:32,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:32,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1398 transitions. [2023-11-06 22:48:32,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 66.57142857142857) internal successors, (1398), 21 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:32,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 163.0) internal successors, (3586), 22 states have internal predecessors, (3586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:32,325 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 163.0) internal successors, (3586), 22 states have internal predecessors, (3586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:32,325 INFO L175 Difference]: Start difference. First operand has 194 places, 232 transitions, 2298 flow. Second operand 21 states and 1398 transitions. [2023-11-06 22:48:32,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 272 transitions, 3000 flow [2023-11-06 22:48:32,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 272 transitions, 2780 flow, removed 27 selfloop flow, removed 25 redundant places. [2023-11-06 22:48:32,373 INFO L231 Difference]: Finished difference. Result has 181 places, 231 transitions, 2133 flow [2023-11-06 22:48:32,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2088, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2133, PETRI_PLACES=181, PETRI_TRANSITIONS=231} [2023-11-06 22:48:32,374 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 161 predicate places. [2023-11-06 22:48:32,374 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 231 transitions, 2133 flow [2023-11-06 22:48:32,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 64.83333333333333) internal successors, (1556), 24 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:32,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:32,375 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:32,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:32,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 22:48:32,581 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 22:48:32,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:32,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1353742881, now seen corresponding path program 14 times [2023-11-06 22:48:32,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:32,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334912973] [2023-11-06 22:48:32,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:32,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:32,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:32,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:32,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334912973] [2023-11-06 22:48:32,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334912973] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:32,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610335021] [2023-11-06 22:48:32,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:48:32,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:32,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:32,740 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:32,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:48:32,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:48:32,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:32,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:48:32,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:33,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:33,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:33,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610335021] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:33,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:33,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-06 22:48:33,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859112583] [2023-11-06 22:48:33,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:33,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:48:33,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:33,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:48:33,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:48:33,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:33,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 231 transitions, 2133 flow. Second operand has 24 states, 24 states have (on average 64.83333333333333) internal successors, (1556), 24 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:33,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:33,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:33,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:33,929 INFO L124 PetriNetUnfolderBase]: 559/1107 cut-off events. [2023-11-06 22:48:33,929 INFO L125 PetriNetUnfolderBase]: For 2933/2933 co-relation queries the response was YES. [2023-11-06 22:48:33,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5208 conditions, 1107 events. 559/1107 cut-off events. For 2933/2933 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6148 event pairs, 35 based on Foata normal form. 3/1106 useless extension candidates. Maximal degree in co-relation 5152. Up to 1046 conditions per place. [2023-11-06 22:48:33,936 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 224 selfloop transitions, 6 changer transitions 30/260 dead transitions. [2023-11-06 22:48:33,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 260 transitions, 2777 flow [2023-11-06 22:48:33,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:48:33,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:48:33,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 938 transitions. [2023-11-06 22:48:33,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4110429447852761 [2023-11-06 22:48:33,938 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 938 transitions. [2023-11-06 22:48:33,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 938 transitions. [2023-11-06 22:48:33,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:33,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 938 transitions. [2023-11-06 22:48:33,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 67.0) internal successors, (938), 14 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 22:48:33,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 163.0) internal successors, (2445), 15 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:33,941 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 163.0) internal successors, (2445), 15 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:33,941 INFO L175 Difference]: Start difference. First operand has 181 places, 231 transitions, 2133 flow. Second operand 14 states and 938 transitions. [2023-11-06 22:48:33,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 260 transitions, 2777 flow [2023-11-06 22:48:33,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 260 transitions, 2716 flow, removed 15 selfloop flow, removed 15 redundant places. [2023-11-06 22:48:33,966 INFO L231 Difference]: Finished difference. Result has 174 places, 226 transitions, 2059 flow [2023-11-06 22:48:33,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2082, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2059, PETRI_PLACES=174, PETRI_TRANSITIONS=226} [2023-11-06 22:48:33,967 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 154 predicate places. [2023-11-06 22:48:33,967 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 226 transitions, 2059 flow [2023-11-06 22:48:33,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 64.83333333333333) internal successors, (1556), 24 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:33,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:33,968 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:33,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:34,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-06 22:48:34,168 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 22:48:34,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:34,169 INFO L85 PathProgramCache]: Analyzing trace with hash -78624491, now seen corresponding path program 15 times [2023-11-06 22:48:34,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:34,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480942304] [2023-11-06 22:48:34,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:34,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:34,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:34,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:34,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480942304] [2023-11-06 22:48:34,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480942304] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:34,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132963208] [2023-11-06 22:48:34,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:48:34,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:34,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:34,376 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:34,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:48:34,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:48:34,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:34,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:48:34,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:34,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:34,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:34,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:34,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132963208] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:34,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:34,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-06 22:48:34,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807060795] [2023-11-06 22:48:34,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:34,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:48:34,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:34,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:48:34,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:48:35,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:35,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 226 transitions, 2059 flow. Second operand has 24 states, 24 states have (on average 64.83333333333333) internal successors, (1556), 24 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:35,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:35,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:35,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:37,001 INFO L124 PetriNetUnfolderBase]: 635/1279 cut-off events. [2023-11-06 22:48:37,001 INFO L125 PetriNetUnfolderBase]: For 3687/3687 co-relation queries the response was YES. [2023-11-06 22:48:37,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5987 conditions, 1279 events. 635/1279 cut-off events. For 3687/3687 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7578 event pairs, 23 based on Foata normal form. 5/1280 useless extension candidates. Maximal degree in co-relation 5924. Up to 896 conditions per place. [2023-11-06 22:48:37,010 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 252 selfloop transitions, 85 changer transitions 25/362 dead transitions. [2023-11-06 22:48:37,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 362 transitions, 3631 flow [2023-11-06 22:48:37,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 22:48:37,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-06 22:48:37,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2430 transitions. [2023-11-06 22:48:37,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41411042944785276 [2023-11-06 22:48:37,015 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2430 transitions. [2023-11-06 22:48:37,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2430 transitions. [2023-11-06 22:48:37,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:37,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2430 transitions. [2023-11-06 22:48:37,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 67.5) internal successors, (2430), 36 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:37,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 163.0) internal successors, (6031), 37 states have internal predecessors, (6031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:37,027 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 163.0) internal successors, (6031), 37 states have internal predecessors, (6031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:37,027 INFO L175 Difference]: Start difference. First operand has 174 places, 226 transitions, 2059 flow. Second operand 36 states and 2430 transitions. [2023-11-06 22:48:37,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 362 transitions, 3631 flow [2023-11-06 22:48:37,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 362 transitions, 3549 flow, removed 34 selfloop flow, removed 13 redundant places. [2023-11-06 22:48:37,077 INFO L231 Difference]: Finished difference. Result has 195 places, 276 transitions, 2801 flow [2023-11-06 22:48:37,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2023, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2801, PETRI_PLACES=195, PETRI_TRANSITIONS=276} [2023-11-06 22:48:37,078 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 175 predicate places. [2023-11-06 22:48:37,078 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 276 transitions, 2801 flow [2023-11-06 22:48:37,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 64.83333333333333) internal successors, (1556), 24 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:37,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:37,079 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:37,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:37,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 22:48:37,285 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 22:48:37,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:37,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1924490653, now seen corresponding path program 6 times [2023-11-06 22:48:37,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:37,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317676836] [2023-11-06 22:48:37,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:37,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:37,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:37,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:37,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:37,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317676836] [2023-11-06 22:48:37,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317676836] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:37,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081262361] [2023-11-06 22:48:37,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:48:37,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:37,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:37,463 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:37,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:48:37,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:48:37,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:37,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:48:37,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:37,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:37,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:37,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081262361] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:37,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:37,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-06 22:48:37,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267928358] [2023-11-06 22:48:37,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:37,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:48:37,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:37,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:48:37,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:48:38,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:38,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 276 transitions, 2801 flow. Second operand has 20 states, 20 states have (on average 64.7) internal successors, (1294), 20 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 22:48:38,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:38,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:38,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:38,611 INFO L124 PetriNetUnfolderBase]: 628/1250 cut-off events. [2023-11-06 22:48:38,612 INFO L125 PetriNetUnfolderBase]: For 4265/4265 co-relation queries the response was YES. [2023-11-06 22:48:38,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6309 conditions, 1250 events. 628/1250 cut-off events. For 4265/4265 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7317 event pairs, 12 based on Foata normal form. 9/1255 useless extension candidates. Maximal degree in co-relation 6249. Up to 1006 conditions per place. [2023-11-06 22:48:38,622 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 255 selfloop transitions, 42 changer transitions 42/339 dead transitions. [2023-11-06 22:48:38,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 339 transitions, 3872 flow [2023-11-06 22:48:38,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:48:38,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:48:38,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1288 transitions. [2023-11-06 22:48:38,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41588634162092347 [2023-11-06 22:48:38,654 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1288 transitions. [2023-11-06 22:48:38,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1288 transitions. [2023-11-06 22:48:38,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:38,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1288 transitions. [2023-11-06 22:48:38,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 67.78947368421052) internal successors, (1288), 19 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 22:48:38,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 163.0) internal successors, (3260), 20 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:38,658 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 163.0) internal successors, (3260), 20 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:38,659 INFO L175 Difference]: Start difference. First operand has 195 places, 276 transitions, 2801 flow. Second operand 19 states and 1288 transitions. [2023-11-06 22:48:38,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 339 transitions, 3872 flow [2023-11-06 22:48:38,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 339 transitions, 3460 flow, removed 184 selfloop flow, removed 17 redundant places. [2023-11-06 22:48:38,718 INFO L231 Difference]: Finished difference. Result has 198 places, 274 transitions, 2575 flow [2023-11-06 22:48:38,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2453, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2575, PETRI_PLACES=198, PETRI_TRANSITIONS=274} [2023-11-06 22:48:38,719 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 178 predicate places. [2023-11-06 22:48:38,719 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 274 transitions, 2575 flow [2023-11-06 22:48:38,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 64.7) internal successors, (1294), 20 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 22:48:38,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:38,720 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:38,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:38,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 22:48:38,926 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 22:48:38,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:38,927 INFO L85 PathProgramCache]: Analyzing trace with hash -936309729, now seen corresponding path program 16 times [2023-11-06 22:48:38,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:38,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262721769] [2023-11-06 22:48:38,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:38,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:39,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:39,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262721769] [2023-11-06 22:48:39,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262721769] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:39,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113536228] [2023-11-06 22:48:39,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:48:39,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:39,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:39,109 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:39,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:48:39,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:48:39,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:39,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:48:39,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:39,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:39,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:39,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:39,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113536228] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:39,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:39,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-06 22:48:39,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818897189] [2023-11-06 22:48:39,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:39,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:48:39,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:39,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:48:39,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:48:39,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:39,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 274 transitions, 2575 flow. Second operand has 24 states, 24 states have (on average 64.83333333333333) internal successors, (1556), 24 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:39,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:39,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:39,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:40,859 INFO L124 PetriNetUnfolderBase]: 598/1202 cut-off events. [2023-11-06 22:48:40,859 INFO L125 PetriNetUnfolderBase]: For 3452/3452 co-relation queries the response was YES. [2023-11-06 22:48:40,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5754 conditions, 1202 events. 598/1202 cut-off events. For 3452/3452 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 6997 event pairs, 25 based on Foata normal form. 7/1205 useless extension candidates. Maximal degree in co-relation 5668. Up to 954 conditions per place. [2023-11-06 22:48:40,868 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 243 selfloop transitions, 46 changer transitions 49/338 dead transitions. [2023-11-06 22:48:40,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 338 transitions, 3601 flow [2023-11-06 22:48:40,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:48:40,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-06 22:48:40,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1874 transitions. [2023-11-06 22:48:40,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41060473269062225 [2023-11-06 22:48:40,879 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1874 transitions. [2023-11-06 22:48:40,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1874 transitions. [2023-11-06 22:48:40,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:40,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1874 transitions. [2023-11-06 22:48:40,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 66.92857142857143) internal successors, (1874), 28 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:40,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 163.0) internal successors, (4727), 29 states have internal predecessors, (4727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:40,887 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 163.0) internal successors, (4727), 29 states have internal predecessors, (4727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:40,887 INFO L175 Difference]: Start difference. First operand has 198 places, 274 transitions, 2575 flow. Second operand 28 states and 1874 transitions. [2023-11-06 22:48:40,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 338 transitions, 3601 flow [2023-11-06 22:48:40,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 338 transitions, 3411 flow, removed 46 selfloop flow, removed 18 redundant places. [2023-11-06 22:48:40,934 INFO L231 Difference]: Finished difference. Result has 205 places, 263 transitions, 2437 flow [2023-11-06 22:48:40,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2389, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2437, PETRI_PLACES=205, PETRI_TRANSITIONS=263} [2023-11-06 22:48:40,935 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 185 predicate places. [2023-11-06 22:48:40,935 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 263 transitions, 2437 flow [2023-11-06 22:48:40,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 64.83333333333333) internal successors, (1556), 24 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:40,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:40,936 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:40,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:41,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 22:48:41,142 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 22:48:41,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:41,143 INFO L85 PathProgramCache]: Analyzing trace with hash 694033711, now seen corresponding path program 7 times [2023-11-06 22:48:41,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:41,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116499816] [2023-11-06 22:48:41,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:41,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:41,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:41,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:41,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116499816] [2023-11-06 22:48:41,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116499816] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:41,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183585371] [2023-11-06 22:48:41,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:48:41,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:41,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:41,342 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:41,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:48:41,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:41,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:48:41,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:41,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:41,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:41,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183585371] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:41,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:41,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-06 22:48:41,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217078899] [2023-11-06 22:48:41,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:41,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:48:41,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:41,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:48:41,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:48:41,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:41,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 263 transitions, 2437 flow. Second operand has 20 states, 20 states have (on average 64.6) internal successors, (1292), 20 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:41,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:41,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:41,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:42,755 INFO L124 PetriNetUnfolderBase]: 565/1147 cut-off events. [2023-11-06 22:48:42,756 INFO L125 PetriNetUnfolderBase]: For 2798/2798 co-relation queries the response was YES. [2023-11-06 22:48:42,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5323 conditions, 1147 events. 565/1147 cut-off events. For 2798/2798 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 6661 event pairs, 11 based on Foata normal form. 9/1152 useless extension candidates. Maximal degree in co-relation 5220. Up to 866 conditions per place. [2023-11-06 22:48:42,766 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 242 selfloop transitions, 49 changer transitions 36/327 dead transitions. [2023-11-06 22:48:42,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 327 transitions, 3412 flow [2023-11-06 22:48:42,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:48:42,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 22:48:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1483 transitions. [2023-11-06 22:48:42,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4135527049637479 [2023-11-06 22:48:42,770 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1483 transitions. [2023-11-06 22:48:42,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1483 transitions. [2023-11-06 22:48:42,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:42,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1483 transitions. [2023-11-06 22:48:42,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 67.4090909090909) internal successors, (1483), 22 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:42,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 163.0) internal successors, (3749), 23 states have internal predecessors, (3749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:42,777 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 163.0) internal successors, (3749), 23 states have internal predecessors, (3749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:42,777 INFO L175 Difference]: Start difference. First operand has 205 places, 263 transitions, 2437 flow. Second operand 22 states and 1483 transitions. [2023-11-06 22:48:42,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 327 transitions, 3412 flow [2023-11-06 22:48:42,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 327 transitions, 3281 flow, removed 47 selfloop flow, removed 10 redundant places. [2023-11-06 22:48:42,819 INFO L231 Difference]: Finished difference. Result has 205 places, 260 transitions, 2462 flow [2023-11-06 22:48:42,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2322, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2462, PETRI_PLACES=205, PETRI_TRANSITIONS=260} [2023-11-06 22:48:42,821 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 185 predicate places. [2023-11-06 22:48:42,821 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 260 transitions, 2462 flow [2023-11-06 22:48:42,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 64.6) internal successors, (1292), 20 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:42,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:42,822 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:42,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:43,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 22:48:43,028 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 22:48:43,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:43,028 INFO L85 PathProgramCache]: Analyzing trace with hash -99670391, now seen corresponding path program 17 times [2023-11-06 22:48:43,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:43,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259464853] [2023-11-06 22:48:43,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:43,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:43,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:43,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:43,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:43,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259464853] [2023-11-06 22:48:43,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259464853] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:43,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860900520] [2023-11-06 22:48:43,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:48:43,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:43,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:43,232 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:43,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 22:48:43,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:48:43,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:43,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:48:43,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:43,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:43,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:43,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860900520] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:43,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:43,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-06 22:48:43,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307309171] [2023-11-06 22:48:43,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:43,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:48:43,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:43,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:48:43,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:48:44,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:44,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 260 transitions, 2462 flow. Second operand has 24 states, 24 states have (on average 64.91666666666667) internal successors, (1558), 24 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:44,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:44,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:44,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:45,163 INFO L124 PetriNetUnfolderBase]: 529/1045 cut-off events. [2023-11-06 22:48:45,164 INFO L125 PetriNetUnfolderBase]: For 2853/2853 co-relation queries the response was YES. [2023-11-06 22:48:45,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5007 conditions, 1045 events. 529/1045 cut-off events. For 2853/2853 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 5724 event pairs, 11 based on Foata normal form. 3/1044 useless extension candidates. Maximal degree in co-relation 4911. Up to 847 conditions per place. [2023-11-06 22:48:45,172 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 226 selfloop transitions, 53 changer transitions 27/306 dead transitions. [2023-11-06 22:48:45,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 306 transitions, 3227 flow [2023-11-06 22:48:45,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:48:45,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 22:48:45,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1618 transitions. [2023-11-06 22:48:45,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41359918200408996 [2023-11-06 22:48:45,175 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1618 transitions. [2023-11-06 22:48:45,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1618 transitions. [2023-11-06 22:48:45,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:45,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1618 transitions. [2023-11-06 22:48:45,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 67.41666666666667) internal successors, (1618), 24 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:45,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 163.0) internal successors, (4075), 25 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:45,183 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 163.0) internal successors, (4075), 25 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:45,183 INFO L175 Difference]: Start difference. First operand has 205 places, 260 transitions, 2462 flow. Second operand 24 states and 1618 transitions. [2023-11-06 22:48:45,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 306 transitions, 3227 flow [2023-11-06 22:48:45,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 306 transitions, 3072 flow, removed 55 selfloop flow, removed 14 redundant places. [2023-11-06 22:48:45,226 INFO L231 Difference]: Finished difference. Result has 201 places, 254 transitions, 2404 flow [2023-11-06 22:48:45,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2310, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2404, PETRI_PLACES=201, PETRI_TRANSITIONS=254} [2023-11-06 22:48:45,227 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 181 predicate places. [2023-11-06 22:48:45,227 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 254 transitions, 2404 flow [2023-11-06 22:48:45,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 64.91666666666667) internal successors, (1558), 24 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:45,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:45,228 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:45,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-06 22:48:45,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:45,434 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 22:48:45,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:45,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1416953577, now seen corresponding path program 8 times [2023-11-06 22:48:45,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:45,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582776754] [2023-11-06 22:48:45,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:45,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:45,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:45,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:45,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:45,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582776754] [2023-11-06 22:48:45,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582776754] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:45,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709175040] [2023-11-06 22:48:45,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:48:45,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:45,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:45,672 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:45,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 22:48:45,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:48:45,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:45,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:48:45,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:45,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:46,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:46,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709175040] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:46,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:46,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-06 22:48:46,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984318739] [2023-11-06 22:48:46,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:46,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:48:46,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:46,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:48:46,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:48:46,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:46,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 254 transitions, 2404 flow. Second operand has 25 states, 25 states have (on average 64.52) internal successors, (1613), 25 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 22:48:46,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:46,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:46,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:47,595 INFO L124 PetriNetUnfolderBase]: 579/1169 cut-off events. [2023-11-06 22:48:47,595 INFO L125 PetriNetUnfolderBase]: For 2813/2813 co-relation queries the response was YES. [2023-11-06 22:48:47,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5517 conditions, 1169 events. 579/1169 cut-off events. For 2813/2813 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6758 event pairs, 11 based on Foata normal form. 7/1170 useless extension candidates. Maximal degree in co-relation 5402. Up to 833 conditions per place. [2023-11-06 22:48:47,608 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 250 selfloop transitions, 108 changer transitions 11/369 dead transitions. [2023-11-06 22:48:47,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 369 transitions, 3838 flow [2023-11-06 22:48:47,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:48:47,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-06 22:48:47,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1898 transitions. [2023-11-06 22:48:47,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41586327782646804 [2023-11-06 22:48:47,612 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1898 transitions. [2023-11-06 22:48:47,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1898 transitions. [2023-11-06 22:48:47,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:47,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1898 transitions. [2023-11-06 22:48:47,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 67.78571428571429) internal successors, (1898), 28 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:47,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 163.0) internal successors, (4727), 29 states have internal predecessors, (4727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:47,620 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 163.0) internal successors, (4727), 29 states have internal predecessors, (4727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:47,621 INFO L175 Difference]: Start difference. First operand has 201 places, 254 transitions, 2404 flow. Second operand 28 states and 1898 transitions. [2023-11-06 22:48:47,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 369 transitions, 3838 flow [2023-11-06 22:48:47,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 369 transitions, 3704 flow, removed 18 selfloop flow, removed 15 redundant places. [2023-11-06 22:48:47,662 INFO L231 Difference]: Finished difference. Result has 213 places, 300 transitions, 3124 flow [2023-11-06 22:48:47,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2286, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3124, PETRI_PLACES=213, PETRI_TRANSITIONS=300} [2023-11-06 22:48:47,663 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 193 predicate places. [2023-11-06 22:48:47,664 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 300 transitions, 3124 flow [2023-11-06 22:48:47,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 64.52) internal successors, (1613), 25 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 22:48:47,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:47,664 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:47,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:47,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-06 22:48:47,870 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 22:48:47,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:47,870 INFO L85 PathProgramCache]: Analyzing trace with hash -2077819797, now seen corresponding path program 9 times [2023-11-06 22:48:47,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:47,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981170286] [2023-11-06 22:48:47,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:47,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:47,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:48,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:48,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981170286] [2023-11-06 22:48:48,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981170286] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:48,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402914114] [2023-11-06 22:48:48,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:48:48,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:48,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:48,073 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:48,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 22:48:48,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:48:48,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:48,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:48:48,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:48,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:48,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:48,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:48,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402914114] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:48,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:48,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-06 22:48:48,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571239700] [2023-11-06 22:48:48,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:48,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:48:48,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:48,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:48:48,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:48:48,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:48,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 300 transitions, 3124 flow. Second operand has 25 states, 25 states have (on average 64.52) internal successors, (1613), 25 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 22:48:48,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:48,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:48,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:49,909 INFO L124 PetriNetUnfolderBase]: 576/1148 cut-off events. [2023-11-06 22:48:49,909 INFO L125 PetriNetUnfolderBase]: For 3837/3837 co-relation queries the response was YES. [2023-11-06 22:48:49,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5957 conditions, 1148 events. 576/1148 cut-off events. For 3837/3837 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 6512 event pairs, 11 based on Foata normal form. 3/1151 useless extension candidates. Maximal degree in co-relation 5832. Up to 833 conditions per place. [2023-11-06 22:48:49,919 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 236 selfloop transitions, 100 changer transitions 22/358 dead transitions. [2023-11-06 22:48:49,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 358 transitions, 4052 flow [2023-11-06 22:48:49,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 22:48:49,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-06 22:48:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1825 transitions. [2023-11-06 22:48:49,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41467848216314473 [2023-11-06 22:48:49,923 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1825 transitions. [2023-11-06 22:48:49,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1825 transitions. [2023-11-06 22:48:49,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:49,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1825 transitions. [2023-11-06 22:48:49,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 67.5925925925926) internal successors, (1825), 27 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:49,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 163.0) internal successors, (4564), 28 states have internal predecessors, (4564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:49,932 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 163.0) internal successors, (4564), 28 states have internal predecessors, (4564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:49,932 INFO L175 Difference]: Start difference. First operand has 213 places, 300 transitions, 3124 flow. Second operand 27 states and 1825 transitions. [2023-11-06 22:48:49,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 358 transitions, 4052 flow [2023-11-06 22:48:49,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 358 transitions, 3888 flow, removed 65 selfloop flow, removed 9 redundant places. [2023-11-06 22:48:49,991 INFO L231 Difference]: Finished difference. Result has 229 places, 292 transitions, 3086 flow [2023-11-06 22:48:49,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2959, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3086, PETRI_PLACES=229, PETRI_TRANSITIONS=292} [2023-11-06 22:48:49,992 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 209 predicate places. [2023-11-06 22:48:49,992 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 292 transitions, 3086 flow [2023-11-06 22:48:49,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 64.52) internal successors, (1613), 25 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 22:48:49,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:49,993 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:50,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:50,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-06 22:48:50,199 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 22:48:50,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:50,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1520946457, now seen corresponding path program 10 times [2023-11-06 22:48:50,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:50,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276249622] [2023-11-06 22:48:50,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:50,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:50,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:50,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:50,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276249622] [2023-11-06 22:48:50,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276249622] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:50,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605506400] [2023-11-06 22:48:50,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:48:50,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:50,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:50,380 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:50,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 22:48:50,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:48:50,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:50,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:48:50,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:50,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:50,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:50,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605506400] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:50,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:50,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2023-11-06 22:48:50,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344441999] [2023-11-06 22:48:50,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:50,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:48:50,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:50,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:48:50,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:48:51,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:51,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 292 transitions, 3086 flow. Second operand has 21 states, 21 states have (on average 64.61904761904762) internal successors, (1357), 21 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:51,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:51,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:51,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:51,805 INFO L124 PetriNetUnfolderBase]: 560/1103 cut-off events. [2023-11-06 22:48:51,805 INFO L125 PetriNetUnfolderBase]: For 3570/3570 co-relation queries the response was YES. [2023-11-06 22:48:51,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5800 conditions, 1103 events. 560/1103 cut-off events. For 3570/3570 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6127 event pairs, 9 based on Foata normal form. 8/1111 useless extension candidates. Maximal degree in co-relation 5675. Up to 364 conditions per place. [2023-11-06 22:48:51,812 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 175 selfloop transitions, 148 changer transitions 29/352 dead transitions. [2023-11-06 22:48:51,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 352 transitions, 4054 flow [2023-11-06 22:48:51,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:48:51,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-06 22:48:51,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1752 transitions. [2023-11-06 22:48:51,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134025483718735 [2023-11-06 22:48:51,816 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1752 transitions. [2023-11-06 22:48:51,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1752 transitions. [2023-11-06 22:48:51,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:51,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1752 transitions. [2023-11-06 22:48:51,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 67.38461538461539) internal successors, (1752), 26 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:51,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 163.0) internal successors, (4401), 27 states have internal predecessors, (4401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:51,823 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 163.0) internal successors, (4401), 27 states have internal predecessors, (4401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:51,823 INFO L175 Difference]: Start difference. First operand has 229 places, 292 transitions, 3086 flow. Second operand 26 states and 1752 transitions. [2023-11-06 22:48:51,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 352 transitions, 4054 flow [2023-11-06 22:48:51,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 352 transitions, 3823 flow, removed 17 selfloop flow, removed 26 redundant places. [2023-11-06 22:48:51,877 INFO L231 Difference]: Finished difference. Result has 225 places, 279 transitions, 3045 flow [2023-11-06 22:48:51,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2821, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3045, PETRI_PLACES=225, PETRI_TRANSITIONS=279} [2023-11-06 22:48:51,878 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 205 predicate places. [2023-11-06 22:48:51,878 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 279 transitions, 3045 flow [2023-11-06 22:48:51,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.61904761904762) internal successors, (1357), 21 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:51,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:51,879 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:51,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:52,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-06 22:48:52,085 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 22:48:52,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:52,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1577009807, now seen corresponding path program 11 times [2023-11-06 22:48:52,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:52,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548323735] [2023-11-06 22:48:52,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:52,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:52,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:52,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:52,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:52,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548323735] [2023-11-06 22:48:52,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548323735] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:52,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79174842] [2023-11-06 22:48:52,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:48:52,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:52,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:52,248 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:52,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 22:48:52,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:48:52,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:52,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:48:52,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:52,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:52,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:52,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79174842] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:52,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:52,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 22 [2023-11-06 22:48:52,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814740083] [2023-11-06 22:48:52,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:52,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:48:52,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:52,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:48:52,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:48:52,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:52,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 279 transitions, 3045 flow. Second operand has 24 states, 24 states have (on average 64.70833333333333) internal successors, (1553), 24 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:52,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:52,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:52,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:53,447 INFO L124 PetriNetUnfolderBase]: 523/1013 cut-off events. [2023-11-06 22:48:53,447 INFO L125 PetriNetUnfolderBase]: For 3523/3523 co-relation queries the response was YES. [2023-11-06 22:48:53,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5517 conditions, 1013 events. 523/1013 cut-off events. For 3523/3523 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5357 event pairs, 7 based on Foata normal form. 3/1016 useless extension candidates. Maximal degree in co-relation 5393. Up to 905 conditions per place. [2023-11-06 22:48:53,454 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 261 selfloop transitions, 21 changer transitions 28/310 dead transitions. [2023-11-06 22:48:53,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 310 transitions, 3784 flow [2023-11-06 22:48:53,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:48:53,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:48:53,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1138 transitions. [2023-11-06 22:48:53,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41068206423673764 [2023-11-06 22:48:53,456 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1138 transitions. [2023-11-06 22:48:53,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1138 transitions. [2023-11-06 22:48:53,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:53,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1138 transitions. [2023-11-06 22:48:53,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 66.94117647058823) internal successors, (1138), 17 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:53,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 163.0) internal successors, (2934), 18 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:53,459 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 163.0) internal successors, (2934), 18 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:53,459 INFO L175 Difference]: Start difference. First operand has 225 places, 279 transitions, 3045 flow. Second operand 17 states and 1138 transitions. [2023-11-06 22:48:53,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 310 transitions, 3784 flow [2023-11-06 22:48:53,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 310 transitions, 3535 flow, removed 34 selfloop flow, removed 18 redundant places. [2023-11-06 22:48:53,494 INFO L231 Difference]: Finished difference. Result has 216 places, 267 transitions, 2711 flow [2023-11-06 22:48:53,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2786, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2711, PETRI_PLACES=216, PETRI_TRANSITIONS=267} [2023-11-06 22:48:53,495 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 196 predicate places. [2023-11-06 22:48:53,495 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 267 transitions, 2711 flow [2023-11-06 22:48:53,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 64.70833333333333) internal successors, (1553), 24 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:53,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:53,496 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:53,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:53,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:53,698 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 22:48:53,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:53,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1436153813, now seen corresponding path program 12 times [2023-11-06 22:48:53,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:53,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843932016] [2023-11-06 22:48:53,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:53,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:53,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:53,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:53,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843932016] [2023-11-06 22:48:53,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843932016] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:53,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762537992] [2023-11-06 22:48:53,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:48:53,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:53,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:53,896 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:53,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 22:48:53,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:48:53,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:54,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:48:54,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:54,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:54,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:54,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:54,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762537992] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:54,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:54,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-11-06 22:48:54,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965669140] [2023-11-06 22:48:54,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:54,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:48:54,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:54,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:48:54,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:48:54,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:54,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 267 transitions, 2711 flow. Second operand has 24 states, 24 states have (on average 64.45833333333333) internal successors, (1547), 24 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:54,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:54,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:54,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:55,377 INFO L124 PetriNetUnfolderBase]: 546/1052 cut-off events. [2023-11-06 22:48:55,377 INFO L125 PetriNetUnfolderBase]: For 3670/3670 co-relation queries the response was YES. [2023-11-06 22:48:55,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5460 conditions, 1052 events. 546/1052 cut-off events. For 3670/3670 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5571 event pairs, 5 based on Foata normal form. 3/1055 useless extension candidates. Maximal degree in co-relation 5340. Up to 913 conditions per place. [2023-11-06 22:48:55,384 INFO L140 encePairwiseOnDemand]: 154/163 looper letters, 272 selfloop transitions, 52 changer transitions 9/333 dead transitions. [2023-11-06 22:48:55,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 333 transitions, 3823 flow [2023-11-06 22:48:55,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:48:55,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:48:55,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1284 transitions. [2023-11-06 22:48:55,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4145947691314175 [2023-11-06 22:48:55,387 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1284 transitions. [2023-11-06 22:48:55,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1284 transitions. [2023-11-06 22:48:55,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:55,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1284 transitions. [2023-11-06 22:48:55,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 67.57894736842105) internal successors, (1284), 19 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:55,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 163.0) internal successors, (3260), 20 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:55,391 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 163.0) internal successors, (3260), 20 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:55,391 INFO L175 Difference]: Start difference. First operand has 216 places, 267 transitions, 2711 flow. Second operand 19 states and 1284 transitions. [2023-11-06 22:48:55,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 333 transitions, 3823 flow [2023-11-06 22:48:55,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 333 transitions, 3674 flow, removed 16 selfloop flow, removed 17 redundant places. [2023-11-06 22:48:55,424 INFO L231 Difference]: Finished difference. Result has 209 places, 294 transitions, 3069 flow [2023-11-06 22:48:55,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2590, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3069, PETRI_PLACES=209, PETRI_TRANSITIONS=294} [2023-11-06 22:48:55,425 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 189 predicate places. [2023-11-06 22:48:55,425 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 294 transitions, 3069 flow [2023-11-06 22:48:55,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 64.45833333333333) internal successors, (1547), 24 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:55,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:55,426 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:55,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-06 22:48:55,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:55,626 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 22:48:55,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:55,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1408448183, now seen corresponding path program 13 times [2023-11-06 22:48:55,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:55,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948241155] [2023-11-06 22:48:55,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:55,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:55,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:55,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:55,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948241155] [2023-11-06 22:48:55,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948241155] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:55,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201389469] [2023-11-06 22:48:55,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:48:55,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:55,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:55,830 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:55,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-06 22:48:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:55,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:48:55,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:56,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:56,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201389469] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:56,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:56,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-11-06 22:48:56,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136105717] [2023-11-06 22:48:56,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:56,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:48:56,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:56,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:48:56,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:48:56,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:56,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 294 transitions, 3069 flow. Second operand has 24 states, 24 states have (on average 64.45833333333333) internal successors, (1547), 24 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:56,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:56,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:56,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:57,289 INFO L124 PetriNetUnfolderBase]: 542/1038 cut-off events. [2023-11-06 22:48:57,289 INFO L125 PetriNetUnfolderBase]: For 3559/3559 co-relation queries the response was YES. [2023-11-06 22:48:57,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5453 conditions, 1038 events. 542/1038 cut-off events. For 3559/3559 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5445 event pairs, 5 based on Foata normal form. 1/1039 useless extension candidates. Maximal degree in co-relation 5347. Up to 913 conditions per place. [2023-11-06 22:48:57,296 INFO L140 encePairwiseOnDemand]: 154/163 looper letters, 268 selfloop transitions, 51 changer transitions 5/324 dead transitions. [2023-11-06 22:48:57,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 324 transitions, 3805 flow [2023-11-06 22:48:57,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:48:57,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:48:57,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1212 transitions. [2023-11-06 22:48:57,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4130879345603272 [2023-11-06 22:48:57,299 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1212 transitions. [2023-11-06 22:48:57,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1212 transitions. [2023-11-06 22:48:57,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:57,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1212 transitions. [2023-11-06 22:48:57,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.33333333333333) internal successors, (1212), 18 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:57,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 163.0) internal successors, (3097), 19 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:57,302 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 163.0) internal successors, (3097), 19 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:57,303 INFO L175 Difference]: Start difference. First operand has 209 places, 294 transitions, 3069 flow. Second operand 18 states and 1212 transitions. [2023-11-06 22:48:57,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 324 transitions, 3805 flow [2023-11-06 22:48:57,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 324 transitions, 3567 flow, removed 67 selfloop flow, removed 10 redundant places. [2023-11-06 22:48:57,338 INFO L231 Difference]: Finished difference. Result has 215 places, 293 transitions, 2925 flow [2023-11-06 22:48:57,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2831, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2925, PETRI_PLACES=215, PETRI_TRANSITIONS=293} [2023-11-06 22:48:57,339 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 195 predicate places. [2023-11-06 22:48:57,339 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 293 transitions, 2925 flow [2023-11-06 22:48:57,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 64.45833333333333) internal successors, (1547), 24 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:57,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:57,340 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:57,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-06 22:48:57,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:57,540 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 22:48:57,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:57,541 INFO L85 PathProgramCache]: Analyzing trace with hash -638240869, now seen corresponding path program 14 times [2023-11-06 22:48:57,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:57,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116473363] [2023-11-06 22:48:57,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:57,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:57,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:57,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116473363] [2023-11-06 22:48:57,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116473363] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:57,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22874402] [2023-11-06 22:48:57,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:48:57,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:57,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:57,739 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:57,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-06 22:48:57,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:48:57,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:57,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:48:57,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:58,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:58,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:58,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:58,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22874402] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:58,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:58,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-11-06 22:48:58,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070068759] [2023-11-06 22:48:58,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:58,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:48:58,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:58,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:48:58,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:48:58,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:48:58,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 293 transitions, 2925 flow. Second operand has 24 states, 24 states have (on average 64.5) internal successors, (1548), 24 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:58,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:58,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:48:58,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:59,422 INFO L124 PetriNetUnfolderBase]: 569/1096 cut-off events. [2023-11-06 22:48:59,423 INFO L125 PetriNetUnfolderBase]: For 3712/3712 co-relation queries the response was YES. [2023-11-06 22:48:59,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5733 conditions, 1096 events. 569/1096 cut-off events. For 3712/3712 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5870 event pairs, 7 based on Foata normal form. 8/1102 useless extension candidates. Maximal degree in co-relation 5626. Up to 945 conditions per place. [2023-11-06 22:48:59,431 INFO L140 encePairwiseOnDemand]: 154/163 looper letters, 277 selfloop transitions, 55 changer transitions 16/348 dead transitions. [2023-11-06 22:48:59,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 348 transitions, 4053 flow [2023-11-06 22:48:59,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:48:59,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 22:48:59,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1350 transitions. [2023-11-06 22:48:59,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41411042944785276 [2023-11-06 22:48:59,434 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1350 transitions. [2023-11-06 22:48:59,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1350 transitions. [2023-11-06 22:48:59,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:59,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1350 transitions. [2023-11-06 22:48:59,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 67.5) internal successors, (1350), 20 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:59,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 163.0) internal successors, (3423), 21 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:59,438 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 163.0) internal successors, (3423), 21 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:59,438 INFO L175 Difference]: Start difference. First operand has 215 places, 293 transitions, 2925 flow. Second operand 20 states and 1350 transitions. [2023-11-06 22:48:59,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 348 transitions, 4053 flow [2023-11-06 22:48:59,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 348 transitions, 3930 flow, removed 8 selfloop flow, removed 18 redundant places. [2023-11-06 22:48:59,474 INFO L231 Difference]: Finished difference. Result has 218 places, 308 transitions, 3233 flow [2023-11-06 22:48:59,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2771, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3233, PETRI_PLACES=218, PETRI_TRANSITIONS=308} [2023-11-06 22:48:59,475 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 198 predicate places. [2023-11-06 22:48:59,475 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 308 transitions, 3233 flow [2023-11-06 22:48:59,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 64.5) internal successors, (1548), 24 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:59,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:59,475 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:59,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:59,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:59,676 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 22:48:59,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:59,676 INFO L85 PathProgramCache]: Analyzing trace with hash 15067453, now seen corresponding path program 15 times [2023-11-06 22:48:59,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:59,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823432524] [2023-11-06 22:48:59,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:59,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:59,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:59,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:59,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:59,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823432524] [2023-11-06 22:48:59,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823432524] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:59,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605920430] [2023-11-06 22:48:59,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:48:59,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:59,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:59,865 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:59,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-06 22:48:59,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:48:59,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:59,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:48:59,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:49:00,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:49:00,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:49:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:49:00,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605920430] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:49:00,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:49:00,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 18 [2023-11-06 22:49:00,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429805683] [2023-11-06 22:49:00,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:49:00,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:49:00,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:00,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:49:00,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:49:00,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:49:00,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 308 transitions, 3233 flow. Second operand has 20 states, 20 states have (on average 64.7) internal successors, (1294), 20 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 22:49:00,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:49:00,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:49:00,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:49:01,001 INFO L124 PetriNetUnfolderBase]: 566/1083 cut-off events. [2023-11-06 22:49:01,001 INFO L125 PetriNetUnfolderBase]: For 3956/3956 co-relation queries the response was YES. [2023-11-06 22:49:01,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5757 conditions, 1083 events. 566/1083 cut-off events. For 3956/3956 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 5746 event pairs, 7 based on Foata normal form. 4/1083 useless extension candidates. Maximal degree in co-relation 5635. Up to 790 conditions per place. [2023-11-06 22:49:01,008 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 255 selfloop transitions, 21 changer transitions 60/336 dead transitions. [2023-11-06 22:49:01,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 336 transitions, 4028 flow [2023-11-06 22:49:01,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:49:01,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 22:49:01,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1069 transitions. [2023-11-06 22:49:01,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4098926380368098 [2023-11-06 22:49:01,010 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1069 transitions. [2023-11-06 22:49:01,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1069 transitions. [2023-11-06 22:49:01,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:49:01,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1069 transitions. [2023-11-06 22:49:01,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 66.8125) internal successors, (1069), 16 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:01,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 163.0) internal successors, (2771), 17 states have internal predecessors, (2771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:01,014 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 163.0) internal successors, (2771), 17 states have internal predecessors, (2771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:01,014 INFO L175 Difference]: Start difference. First operand has 218 places, 308 transitions, 3233 flow. Second operand 16 states and 1069 transitions. [2023-11-06 22:49:01,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 336 transitions, 4028 flow [2023-11-06 22:49:01,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 336 transitions, 3805 flow, removed 85 selfloop flow, removed 12 redundant places. [2023-11-06 22:49:01,053 INFO L231 Difference]: Finished difference. Result has 218 places, 265 transitions, 2535 flow [2023-11-06 22:49:01,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=3005, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2535, PETRI_PLACES=218, PETRI_TRANSITIONS=265} [2023-11-06 22:49:01,053 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 198 predicate places. [2023-11-06 22:49:01,053 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 265 transitions, 2535 flow [2023-11-06 22:49:01,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 64.7) internal successors, (1294), 20 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 22:49:01,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:49:01,054 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:49:01,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-06 22:49:01,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:01,254 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 22:49:01,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:01,255 INFO L85 PathProgramCache]: Analyzing trace with hash -199058425, now seen corresponding path program 16 times [2023-11-06 22:49:01,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:01,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514828838] [2023-11-06 22:49:01,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:01,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:01,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:01,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:49:01,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:01,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514828838] [2023-11-06 22:49:01,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514828838] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:49:01,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990330585] [2023-11-06 22:49:01,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:49:01,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:01,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:49:01,446 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:49:01,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-06 22:49:01,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:49:01,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:49:01,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 22:49:01,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:49:01,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:49:01,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:49:01,907 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:49:01,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990330585] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:49:01,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:49:01,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 7] total 20 [2023-11-06 22:49:01,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289386259] [2023-11-06 22:49:01,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:49:01,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:49:01,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:01,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:49:01,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:49:02,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:49:02,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 265 transitions, 2535 flow. Second operand has 22 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 22:49:02,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:49:02,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:49:02,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:49:03,117 INFO L124 PetriNetUnfolderBase]: 501/1004 cut-off events. [2023-11-06 22:49:03,117 INFO L125 PetriNetUnfolderBase]: For 3168/3168 co-relation queries the response was YES. [2023-11-06 22:49:03,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4959 conditions, 1004 events. 501/1004 cut-off events. For 3168/3168 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5436 event pairs, 7 based on Foata normal form. 4/1002 useless extension candidates. Maximal degree in co-relation 4893. Up to 655 conditions per place. [2023-11-06 22:49:03,148 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 223 selfloop transitions, 94 changer transitions 26/343 dead transitions. [2023-11-06 22:49:03,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 343 transitions, 3584 flow [2023-11-06 22:49:03,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:49:03,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-06 22:49:03,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1756 transitions. [2023-11-06 22:49:03,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4143463898065125 [2023-11-06 22:49:03,151 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1756 transitions. [2023-11-06 22:49:03,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1756 transitions. [2023-11-06 22:49:03,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:49:03,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1756 transitions. [2023-11-06 22:49:03,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 67.53846153846153) internal successors, (1756), 26 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:03,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 163.0) internal successors, (4401), 27 states have internal predecessors, (4401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:03,157 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 163.0) internal successors, (4401), 27 states have internal predecessors, (4401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:03,157 INFO L175 Difference]: Start difference. First operand has 218 places, 265 transitions, 2535 flow. Second operand 26 states and 1756 transitions. [2023-11-06 22:49:03,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 343 transitions, 3584 flow [2023-11-06 22:49:03,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 343 transitions, 3459 flow, removed 21 selfloop flow, removed 25 redundant places. [2023-11-06 22:49:03,186 INFO L231 Difference]: Finished difference. Result has 203 places, 274 transitions, 2714 flow [2023-11-06 22:49:03,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2418, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2714, PETRI_PLACES=203, PETRI_TRANSITIONS=274} [2023-11-06 22:49:03,188 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 183 predicate places. [2023-11-06 22:49:03,188 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 274 transitions, 2714 flow [2023-11-06 22:49:03,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 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 22:49:03,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:49:03,189 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:49:03,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-06 22:49:03,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-06 22:49:03,391 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 22:49:03,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:03,391 INFO L85 PathProgramCache]: Analyzing trace with hash -538133349, now seen corresponding path program 17 times [2023-11-06 22:49:03,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:03,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302766137] [2023-11-06 22:49:03,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:03,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:03,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:03,595 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:49:03,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:03,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302766137] [2023-11-06 22:49:03,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302766137] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:49:03,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535605308] [2023-11-06 22:49:03,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:49:03,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:03,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:49:03,597 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:49:03,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-06 22:49:03,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:49:03,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:49:03,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 22:49:03,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:49:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:49:03,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:49:04,016 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:49:04,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535605308] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:49:04,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:49:04,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 7] total 20 [2023-11-06 22:49:04,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333667729] [2023-11-06 22:49:04,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:49:04,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:49:04,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:04,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:49:04,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:49:04,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:49:04,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 274 transitions, 2714 flow. Second operand has 22 states, 22 states have (on average 64.5909090909091) internal successors, (1421), 22 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:04,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:49:04,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:49:04,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:49:05,188 INFO L124 PetriNetUnfolderBase]: 465/912 cut-off events. [2023-11-06 22:49:05,188 INFO L125 PetriNetUnfolderBase]: For 2774/2774 co-relation queries the response was YES. [2023-11-06 22:49:05,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4758 conditions, 912 events. 465/912 cut-off events. For 2774/2774 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4685 event pairs, 3 based on Foata normal form. 4/902 useless extension candidates. Maximal degree in co-relation 4701. Up to 655 conditions per place. [2023-11-06 22:49:05,194 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 214 selfloop transitions, 91 changer transitions 12/317 dead transitions. [2023-11-06 22:49:05,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 317 transitions, 3510 flow [2023-11-06 22:49:05,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:49:05,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 22:49:05,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1549 transitions. [2023-11-06 22:49:05,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41317684715924247 [2023-11-06 22:49:05,198 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1549 transitions. [2023-11-06 22:49:05,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1549 transitions. [2023-11-06 22:49:05,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:49:05,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1549 transitions. [2023-11-06 22:49:05,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 67.34782608695652) internal successors, (1549), 23 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 22:49:05,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 163.0) internal successors, (3912), 24 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:05,202 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 163.0) internal successors, (3912), 24 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:05,202 INFO L175 Difference]: Start difference. First operand has 203 places, 274 transitions, 2714 flow. Second operand 23 states and 1549 transitions. [2023-11-06 22:49:05,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 317 transitions, 3510 flow [2023-11-06 22:49:05,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 317 transitions, 3295 flow, removed 32 selfloop flow, removed 15 redundant places. [2023-11-06 22:49:05,232 INFO L231 Difference]: Finished difference. Result has 207 places, 271 transitions, 2664 flow [2023-11-06 22:49:05,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2504, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2664, PETRI_PLACES=207, PETRI_TRANSITIONS=271} [2023-11-06 22:49:05,233 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 187 predicate places. [2023-11-06 22:49:05,233 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 271 transitions, 2664 flow [2023-11-06 22:49:05,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 64.5909090909091) internal successors, (1421), 22 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:05,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:49:05,234 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:49:05,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-06 22:49:05,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-06 22:49:05,434 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 22:49:05,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:05,435 INFO L85 PathProgramCache]: Analyzing trace with hash 775966895, now seen corresponding path program 18 times [2023-11-06 22:49:05,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:05,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149442856] [2023-11-06 22:49:05,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:05,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:49:05,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:05,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149442856] [2023-11-06 22:49:05,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149442856] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:49:05,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528590776] [2023-11-06 22:49:05,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:49:05,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:05,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:49:05,615 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:49:05,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-06 22:49:05,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-06 22:49:05,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:49:05,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 22:49:05,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:49:05,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:49:05,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:49:06,048 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:49:06,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528590776] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:49:06,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:49:06,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 7] total 19 [2023-11-06 22:49:06,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873717867] [2023-11-06 22:49:06,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:49:06,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:49:06,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:06,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:49:06,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:49:06,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:49:06,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 271 transitions, 2664 flow. Second operand has 21 states, 21 states have (on average 64.66666666666667) internal successors, (1358), 21 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:06,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:49:06,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:49:06,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:49:07,025 INFO L124 PetriNetUnfolderBase]: 460/883 cut-off events. [2023-11-06 22:49:07,025 INFO L125 PetriNetUnfolderBase]: For 2271/2271 co-relation queries the response was YES. [2023-11-06 22:49:07,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4563 conditions, 883 events. 460/883 cut-off events. For 2271/2271 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4416 event pairs, 2 based on Foata normal form. 10/879 useless extension candidates. Maximal degree in co-relation 4508. Up to 227 conditions per place. [2023-11-06 22:49:07,030 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 76 selfloop transitions, 29 changer transitions 208/313 dead transitions. [2023-11-06 22:49:07,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 313 transitions, 3458 flow [2023-11-06 22:49:07,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:49:07,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 22:49:07,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1478 transitions. [2023-11-06 22:49:07,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121583937534858 [2023-11-06 22:49:07,033 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1478 transitions. [2023-11-06 22:49:07,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1478 transitions. [2023-11-06 22:49:07,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:49:07,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1478 transitions. [2023-11-06 22:49:07,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 67.18181818181819) internal successors, (1478), 22 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:07,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 163.0) internal successors, (3749), 23 states have internal predecessors, (3749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:07,038 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 163.0) internal successors, (3749), 23 states have internal predecessors, (3749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:07,038 INFO L175 Difference]: Start difference. First operand has 207 places, 271 transitions, 2664 flow. Second operand 22 states and 1478 transitions. [2023-11-06 22:49:07,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 313 transitions, 3458 flow [2023-11-06 22:49:07,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 313 transitions, 3263 flow, removed 3 selfloop flow, removed 22 redundant places. [2023-11-06 22:49:07,064 INFO L231 Difference]: Finished difference. Result has 199 places, 88 transitions, 764 flow [2023-11-06 22:49:07,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2453, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=764, PETRI_PLACES=199, PETRI_TRANSITIONS=88} [2023-11-06 22:49:07,065 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 179 predicate places. [2023-11-06 22:49:07,065 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 88 transitions, 764 flow [2023-11-06 22:49:07,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.66666666666667) internal successors, (1358), 21 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:07,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:49:07,066 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:49:07,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-06 22:49:07,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:07,267 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 22:49:07,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:07,267 INFO L85 PathProgramCache]: Analyzing trace with hash -283977313, now seen corresponding path program 19 times [2023-11-06 22:49:07,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:07,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870770545] [2023-11-06 22:49:07,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:07,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:07,500 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 22:49:07,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:07,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870770545] [2023-11-06 22:49:07,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870770545] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:49:07,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147015538] [2023-11-06 22:49:07,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:49:07,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:07,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:49:07,502 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:49:07,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-06 22:49:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:07,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 22:49:07,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:49:07,849 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 22:49:07,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:49:07,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:49:07,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147015538] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:49:07,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:49:07,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 21 [2023-11-06 22:49:07,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471422010] [2023-11-06 22:49:07,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:49:07,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:49:07,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:07,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:49:07,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:49:08,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:49:08,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 88 transitions, 764 flow. Second operand has 23 states, 23 states have (on average 64.6086956521739) internal successors, (1486), 23 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:08,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:49:08,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:49:08,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:49:09,088 INFO L124 PetriNetUnfolderBase]: 134/338 cut-off events. [2023-11-06 22:49:09,088 INFO L125 PetriNetUnfolderBase]: For 691/691 co-relation queries the response was YES. [2023-11-06 22:49:09,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1476 conditions, 338 events. 134/338 cut-off events. For 691/691 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1576 event pairs, 1 based on Foata normal form. 7/335 useless extension candidates. Maximal degree in co-relation 1424. Up to 147 conditions per place. [2023-11-06 22:49:09,090 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 90 selfloop transitions, 27 changer transitions 20/137 dead transitions. [2023-11-06 22:49:09,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 137 transitions, 1212 flow [2023-11-06 22:49:09,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:49:09,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 22:49:09,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1599 transitions. [2023-11-06 22:49:09,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087423312883436 [2023-11-06 22:49:09,094 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1599 transitions. [2023-11-06 22:49:09,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1599 transitions. [2023-11-06 22:49:09,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:49:09,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1599 transitions. [2023-11-06 22:49:09,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 66.625) internal successors, (1599), 24 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:09,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 163.0) internal successors, (4075), 25 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:09,102 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 163.0) internal successors, (4075), 25 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:09,102 INFO L175 Difference]: Start difference. First operand has 199 places, 88 transitions, 764 flow. Second operand 24 states and 1599 transitions. [2023-11-06 22:49:09,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 137 transitions, 1212 flow [2023-11-06 22:49:09,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 137 transitions, 932 flow, removed 45 selfloop flow, removed 53 redundant places. [2023-11-06 22:49:09,114 INFO L231 Difference]: Finished difference. Result has 111 places, 88 transitions, 579 flow [2023-11-06 22:49:09,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=579, PETRI_PLACES=111, PETRI_TRANSITIONS=88} [2023-11-06 22:49:09,115 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 91 predicate places. [2023-11-06 22:49:09,115 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 88 transitions, 579 flow [2023-11-06 22:49:09,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 64.6086956521739) internal successors, (1486), 23 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:09,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:49:09,116 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:49:09,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-06 22:49:09,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:09,322 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 22:49:09,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:09,323 INFO L85 PathProgramCache]: Analyzing trace with hash -305023213, now seen corresponding path program 20 times [2023-11-06 22:49:09,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:09,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596172828] [2023-11-06 22:49:09,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:09,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:09,604 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 22:49:09,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:09,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596172828] [2023-11-06 22:49:09,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596172828] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:49:09,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825195188] [2023-11-06 22:49:09,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:49:09,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:09,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:49:09,607 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:49:09,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-06 22:49:09,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:49:09,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:49:09,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 22:49:09,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:49:09,962 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 22:49:09,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:49:10,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:49:10,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825195188] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:49:10,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:49:10,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 21 [2023-11-06 22:49:10,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621984305] [2023-11-06 22:49:10,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:49:10,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:49:10,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:10,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:49:10,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:49:10,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:49:10,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 88 transitions, 579 flow. Second operand has 23 states, 23 states have (on average 64.69565217391305) internal successors, (1488), 23 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:10,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:49:10,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:49:10,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:49:10,944 INFO L124 PetriNetUnfolderBase]: 124/288 cut-off events. [2023-11-06 22:49:10,944 INFO L125 PetriNetUnfolderBase]: For 262/262 co-relation queries the response was YES. [2023-11-06 22:49:10,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1114 conditions, 288 events. 124/288 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1176 event pairs, 1 based on Foata normal form. 5/279 useless extension candidates. Maximal degree in co-relation 1082. Up to 147 conditions per place. [2023-11-06 22:49:10,946 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 60 selfloop transitions, 8 changer transitions 55/123 dead transitions. [2023-11-06 22:49:10,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 123 transitions, 917 flow [2023-11-06 22:49:10,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:49:10,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 22:49:10,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1333 transitions. [2023-11-06 22:49:10,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088957055214724 [2023-11-06 22:49:10,949 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1333 transitions. [2023-11-06 22:49:10,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1333 transitions. [2023-11-06 22:49:10,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:49:10,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1333 transitions. [2023-11-06 22:49:10,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 66.65) internal successors, (1333), 20 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:10,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 163.0) internal successors, (3423), 21 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:10,956 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 163.0) internal successors, (3423), 21 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:10,956 INFO L175 Difference]: Start difference. First operand has 111 places, 88 transitions, 579 flow. Second operand 20 states and 1333 transitions. [2023-11-06 22:49:10,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 123 transitions, 917 flow [2023-11-06 22:49:10,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 123 transitions, 849 flow, removed 9 selfloop flow, removed 13 redundant places. [2023-11-06 22:49:10,962 INFO L231 Difference]: Finished difference. Result has 110 places, 65 transitions, 425 flow [2023-11-06 22:49:10,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=425, PETRI_PLACES=110, PETRI_TRANSITIONS=65} [2023-11-06 22:49:10,963 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 90 predicate places. [2023-11-06 22:49:10,963 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 65 transitions, 425 flow [2023-11-06 22:49:10,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 64.69565217391305) internal successors, (1488), 23 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:10,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:49:10,964 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:49:10,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-06 22:49:11,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:11,168 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 22:49:11,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:11,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1468992235, now seen corresponding path program 21 times [2023-11-06 22:49:11,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:11,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268998332] [2023-11-06 22:49:11,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:11,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:11,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:11,405 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 22:49:11,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:11,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268998332] [2023-11-06 22:49:11,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268998332] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:49:11,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973273686] [2023-11-06 22:49:11,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:49:11,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:11,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:49:11,408 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:49:11,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-06 22:49:11,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 22:49:11,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:49:11,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 22:49:11,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:49:11,847 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 22:49:11,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:49:11,979 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 22:49:11,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973273686] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:49:11,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:49:11,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 23 [2023-11-06 22:49:11,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492772026] [2023-11-06 22:49:11,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:49:11,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:49:11,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:11,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:49:11,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:49:12,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-06 22:49:12,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 65 transitions, 425 flow. Second operand has 25 states, 25 states have (on average 64.72) internal successors, (1618), 25 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:12,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:49:12,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-06 22:49:12,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:49:12,807 INFO L124 PetriNetUnfolderBase]: 89/187 cut-off events. [2023-11-06 22:49:12,807 INFO L125 PetriNetUnfolderBase]: For 146/146 co-relation queries the response was YES. [2023-11-06 22:49:12,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 187 events. 89/187 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 591 event pairs, 0 based on Foata normal form. 5/178 useless extension candidates. Maximal degree in co-relation 721. Up to 92 conditions per place. [2023-11-06 22:49:12,808 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 0 selfloop transitions, 0 changer transitions 86/86 dead transitions. [2023-11-06 22:49:12,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 86 transitions, 649 flow [2023-11-06 22:49:12,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:49:12,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:49:12,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1120 transitions. [2023-11-06 22:49:12,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418621436304586 [2023-11-06 22:49:12,811 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1120 transitions. [2023-11-06 22:49:12,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1120 transitions. [2023-11-06 22:49:12,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:49:12,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1120 transitions. [2023-11-06 22:49:12,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 65.88235294117646) internal successors, (1120), 17 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:12,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 163.0) internal successors, (2934), 18 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:12,817 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 163.0) internal successors, (2934), 18 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:12,817 INFO L175 Difference]: Start difference. First operand has 110 places, 65 transitions, 425 flow. Second operand 17 states and 1120 transitions. [2023-11-06 22:49:12,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 86 transitions, 649 flow [2023-11-06 22:49:12,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 86 transitions, 585 flow, removed 8 selfloop flow, removed 14 redundant places. [2023-11-06 22:49:12,822 INFO L231 Difference]: Finished difference. Result has 80 places, 0 transitions, 0 flow [2023-11-06 22:49:12,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=0, PETRI_PLACES=80, PETRI_TRANSITIONS=0} [2023-11-06 22:49:12,823 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 60 predicate places. [2023-11-06 22:49:12,823 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 0 transitions, 0 flow [2023-11-06 22:49:12,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 64.72) internal successors, (1618), 25 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:12,827 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-06 22:49:12,828 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-06 22:49:12,828 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-06 22:49:12,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-11-06 22:49:13,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:13,035 INFO L445 BasicCegarLoop]: Path program histogram: [21, 17, 6] [2023-11-06 22:49:13,039 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-06 22:49:13,039 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-06 22:49:13,043 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:49:13 BasicIcfg [2023-11-06 22:49:13,044 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-06 22:49:13,044 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 22:49:13,044 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 22:49:13,045 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 22:49:13,045 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:49" (3/4) ... [2023-11-06 22:49:13,048 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-06 22:49:13,052 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-11-06 22:49:13,053 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-11-06 22:49:13,059 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2023-11-06 22:49:13,059 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-06 22:49:13,059 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-06 22:49:13,060 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-06 22:49:13,120 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.graphml [2023-11-06 22:49:13,120 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.yaml [2023-11-06 22:49:13,120 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 22:49:13,121 INFO L158 Benchmark]: Toolchain (without parser) took 84657.49ms. Allocated memory was 167.8MB in the beginning and 448.8MB in the end (delta: 281.0MB). Free memory was 133.3MB in the beginning and 354.2MB in the end (delta: -220.9MB). Peak memory consumption was 62.2MB. Max. memory is 16.1GB. [2023-11-06 22:49:13,122 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 167.8MB. Free memory was 137.4MB in the beginning and 137.3MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:49:13,122 INFO L158 Benchmark]: CACSL2BoogieTranslator took 259.72ms. Allocated memory is still 167.8MB. Free memory was 132.8MB in the beginning and 122.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:49:13,122 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.14ms. Allocated memory is still 167.8MB. Free memory was 121.8MB in the beginning and 120.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 22:49:13,123 INFO L158 Benchmark]: Boogie Preprocessor took 30.10ms. Allocated memory is still 167.8MB. Free memory was 120.2MB in the beginning and 119.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:49:13,123 INFO L158 Benchmark]: RCFGBuilder took 661.80ms. Allocated memory is still 167.8MB. Free memory was 119.1MB in the beginning and 104.0MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-06 22:49:13,124 INFO L158 Benchmark]: TraceAbstraction took 83584.72ms. Allocated memory was 167.8MB in the beginning and 448.8MB in the end (delta: 281.0MB). Free memory was 102.9MB in the beginning and 358.0MB in the end (delta: -255.1MB). Peak memory consumption was 28.6MB. Max. memory is 16.1GB. [2023-11-06 22:49:13,124 INFO L158 Benchmark]: Witness Printer took 76.21ms. Allocated memory is still 448.8MB. Free memory was 358.0MB in the beginning and 354.2MB in the end (delta: 3.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 22:49:13,132 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 167.8MB. Free memory was 137.4MB in the beginning and 137.3MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 259.72ms. Allocated memory is still 167.8MB. Free memory was 132.8MB in the beginning and 122.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.14ms. Allocated memory is still 167.8MB. Free memory was 121.8MB in the beginning and 120.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.10ms. Allocated memory is still 167.8MB. Free memory was 120.2MB in the beginning and 119.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 661.80ms. Allocated memory is still 167.8MB. Free memory was 119.1MB in the beginning and 104.0MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 83584.72ms. Allocated memory was 167.8MB in the beginning and 448.8MB in the end (delta: 281.0MB). Free memory was 102.9MB in the beginning and 358.0MB in the end (delta: -255.1MB). Peak memory consumption was 28.6MB. Max. memory is 16.1GB. * Witness Printer took 76.21ms. Allocated memory is still 448.8MB. Free memory was 358.0MB in the beginning and 354.2MB in the end (delta: 3.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.0s, 79 PlacesBefore, 20 PlacesAfterwards, 78 TransitionsBefore, 15 TransitionsAfterwards, 572 CoEnabledTransitionPairs, 6 FixpointIterations, 39 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 8 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 74 TotalNumberOfCompositions, 601 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 586, independent: 582, independent conditional: 0, independent unconditional: 582, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 317, independent: 315, independent conditional: 0, independent unconditional: 315, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 586, independent: 267, independent conditional: 0, independent unconditional: 267, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 317, unknown conditional: 0, unknown unconditional: 317] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 76]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 106 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 83.5s, OverallIterations: 44, TraceHistogramMax: 4, PathProgramHistogramMax: 21, EmptinessCheckTime: 0.0s, AutomataDifference: 44.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7595 SdHoareTripleChecker+Valid, 25.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6970 mSDsluCounter, 4916 SdHoareTripleChecker+Invalid, 21.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4652 mSDsCounter, 1098 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 40746 IncrementalHoareTripleChecker+Invalid, 41844 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1098 mSolverCounterUnsat, 264 mSDtfsCounter, 40746 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1953 GetRequests, 688 SyntacticMatches, 7 SemanticMatches, 1258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12316 ImplicationChecksByTransitivity, 20.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3233occurred in iteration=37, InterpolantAutomatonStates: 903, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 23.3s InterpolantComputationTime, 1302 NumberOfCodeBlocks, 1302 NumberOfCodeBlocksAsserted, 127 NumberOfCheckSat, 1794 ConstructedInterpolants, 0 QuantifiedInterpolants, 16649 SizeOfPredicates, 42 NumberOfNonLiveVariables, 4305 ConjunctsInSsa, 797 ConjunctsInUnsatCore, 120 InterpolantComputations, 6 PerfectInterpolantSequences, 53/603 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-06 22:49:13,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa4cb64-60a7-4207-9df3-aaeee8b03ea1/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE