./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/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_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/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_f37574fb-b0d6-4a36-b68c-ac02d093170d/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 8e3c959108026afa89c4d07543133cda81a16d409ef9b7609f190c1caa51d799 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:42:14,847 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:42:14,978 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:42:14,986 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:42:14,987 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:42:15,024 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:42:15,025 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:42:15,026 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:42:15,027 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:42:15,028 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:42:15,029 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:42:15,030 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:42:15,031 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:42:15,032 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:42:15,033 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:42:15,034 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:42:15,037 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:42:15,042 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:42:15,044 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:42:15,045 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:42:15,046 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:42:15,047 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:42:15,047 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:42:15,048 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:42:15,049 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:42:15,050 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:42:15,051 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:42:15,051 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:42:15,052 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:42:15,053 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:42:15,055 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:42:15,055 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:42:15,056 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:42:15,056 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:42:15,057 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:42:15,057 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:42:15,057 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:42:15,058 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:42:15,058 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:42:15,059 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_f37574fb-b0d6-4a36-b68c-ac02d093170d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e3c959108026afa89c4d07543133cda81a16d409ef9b7609f190c1caa51d799 [2023-11-06 22:42:15,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:42:15,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:42:15,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:42:15,564 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:42:15,565 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:42:15,567 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/parallel-misc-3.wvr.c [2023-11-06 22:42:18,913 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:42:19,117 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:42:19,118 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/sv-benchmarks/c/weaver/parallel-misc-3.wvr.c [2023-11-06 22:42:19,127 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/data/dbd89239e/ccc9fb6659194f1184e95d0a8876004f/FLAG67ded3fc5 [2023-11-06 22:42:19,142 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/data/dbd89239e/ccc9fb6659194f1184e95d0a8876004f [2023-11-06 22:42:19,145 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:42:19,147 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:42:19,149 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:42:19,149 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:42:19,155 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:42:19,155 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:42:19" (1/1) ... [2023-11-06 22:42:19,157 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51f029d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:19, skipping insertion in model container [2023-11-06 22:42:19,157 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:42:19" (1/1) ... [2023-11-06 22:42:19,181 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:42:19,390 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_f37574fb-b0d6-4a36-b68c-ac02d093170d/sv-benchmarks/c/weaver/parallel-misc-3.wvr.c[2410,2423] [2023-11-06 22:42:19,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:42:19,450 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:42:19,493 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_f37574fb-b0d6-4a36-b68c-ac02d093170d/sv-benchmarks/c/weaver/parallel-misc-3.wvr.c[2410,2423] [2023-11-06 22:42:19,496 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:42:19,505 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:42:19,505 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:42:19,513 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:42:19,513 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:19 WrapperNode [2023-11-06 22:42:19,514 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:42:19,515 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:42:19,515 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:42:19,515 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:42:19,523 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:19" (1/1) ... [2023-11-06 22:42:19,531 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:19" (1/1) ... [2023-11-06 22:42:19,549 INFO L138 Inliner]: procedures = 21, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52 [2023-11-06 22:42:19,549 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:42:19,552 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:42:19,552 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:42:19,553 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:42:19,561 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:19" (1/1) ... [2023-11-06 22:42:19,561 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:19" (1/1) ... [2023-11-06 22:42:19,565 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:19" (1/1) ... [2023-11-06 22:42:19,565 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:19" (1/1) ... [2023-11-06 22:42:19,571 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:19" (1/1) ... [2023-11-06 22:42:19,574 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:19" (1/1) ... [2023-11-06 22:42:19,576 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:19" (1/1) ... [2023-11-06 22:42:19,577 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:19" (1/1) ... [2023-11-06 22:42:19,580 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:42:19,581 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:42:19,581 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:42:19,581 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:42:19,582 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:19" (1/1) ... [2023-11-06 22:42:19,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:42:19,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:19,618 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:42:19,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:42:19,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:42:19,662 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:42:19,662 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:42:19,663 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:42:19,663 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:42:19,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:42:19,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:42:19,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:42:19,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:42:19,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:42:19,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:42:19,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:42:19,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:42:19,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:42:19,666 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 22:42:19,756 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:42:19,758 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:42:19,984 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:42:20,009 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:42:20,009 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:42:20,012 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:42:20 BoogieIcfgContainer [2023-11-06 22:42:20,012 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:42:20,014 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:42:20,014 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:42:20,017 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:42:20,017 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:42:19" (1/3) ... [2023-11-06 22:42:20,018 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11961c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:42:20, skipping insertion in model container [2023-11-06 22:42:20,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:19" (2/3) ... [2023-11-06 22:42:20,018 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11961c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:42:20, skipping insertion in model container [2023-11-06 22:42:20,019 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:42:20" (3/3) ... [2023-11-06 22:42:20,020 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-3.wvr.c [2023-11-06 22:42:20,027 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:42:20,036 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:42:20,037 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:42:20,037 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:42:20,107 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:42:20,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 93 transitions, 200 flow [2023-11-06 22:42:20,203 INFO L124 PetriNetUnfolderBase]: 11/91 cut-off events. [2023-11-06 22:42:20,204 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:42:20,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 91 events. 11/91 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 104 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 48. Up to 4 conditions per place. [2023-11-06 22:42:20,210 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 93 transitions, 200 flow [2023-11-06 22:42:20,215 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 82 transitions, 176 flow [2023-11-06 22:42:20,219 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:42:20,230 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 82 transitions, 176 flow [2023-11-06 22:42:20,233 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 78 places, 82 transitions, 176 flow [2023-11-06 22:42:20,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 82 transitions, 176 flow [2023-11-06 22:42:20,271 INFO L124 PetriNetUnfolderBase]: 11/82 cut-off events. [2023-11-06 22:42:20,272 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:42:20,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 11/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 101 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 48. Up to 4 conditions per place. [2023-11-06 22:42:20,275 INFO L119 LiptonReduction]: Number of co-enabled transitions 1188 [2023-11-06 22:42:24,660 INFO L134 LiptonReduction]: Checked pairs total: 1134 [2023-11-06 22:42:24,661 INFO L136 LiptonReduction]: Total number of compositions: 81 [2023-11-06 22:42:24,686 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:42:24,693 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;@287dcbb6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:42:24,693 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 22:42:24,704 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:42:24,705 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-11-06 22:42:24,705 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:42:24,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:24,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:24,707 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 22:42:24,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:24,712 INFO L85 PathProgramCache]: Analyzing trace with hash -660530062, now seen corresponding path program 1 times [2023-11-06 22:42:24,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:24,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721985394] [2023-11-06 22:42:24,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:24,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:25,028 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 22:42:25,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:25,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721985394] [2023-11-06 22:42:25,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721985394] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:25,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:25,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:42:25,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512203025] [2023-11-06 22:42:25,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:25,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:42:25,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:25,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:42:25,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:42:25,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 174 [2023-11-06 22:42:25,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 13 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:25,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:25,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 174 [2023-11-06 22:42:25,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:25,183 INFO L124 PetriNetUnfolderBase]: 41/77 cut-off events. [2023-11-06 22:42:25,183 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-06 22:42:25,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 77 events. 41/77 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 171 event pairs, 9 based on Foata normal form. 1/54 useless extension candidates. Maximal degree in co-relation 120. Up to 51 conditions per place. [2023-11-06 22:42:25,187 INFO L140 encePairwiseOnDemand]: 170/174 looper letters, 19 selfloop transitions, 3 changer transitions 1/23 dead transitions. [2023-11-06 22:42:25,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 23 transitions, 113 flow [2023-11-06 22:42:25,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:42:25,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:42:25,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 264 transitions. [2023-11-06 22:42:25,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057471264367817 [2023-11-06 22:42:25,216 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 264 transitions. [2023-11-06 22:42:25,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 264 transitions. [2023-11-06 22:42:25,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:25,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 264 transitions. [2023-11-06 22:42:25,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:25,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:25,235 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:25,237 INFO L175 Difference]: Start difference. First operand has 18 places, 13 transitions, 38 flow. Second operand 3 states and 264 transitions. [2023-11-06 22:42:25,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 23 transitions, 113 flow [2023-11-06 22:42:25,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 23 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:42:25,242 INFO L231 Difference]: Finished difference. Result has 17 places, 15 transitions, 49 flow [2023-11-06 22:42:25,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=49, PETRI_PLACES=17, PETRI_TRANSITIONS=15} [2023-11-06 22:42:25,250 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, -1 predicate places. [2023-11-06 22:42:25,251 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 15 transitions, 49 flow [2023-11-06 22:42:25,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:25,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:25,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:25,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:42:25,253 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 22:42:25,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:25,263 INFO L85 PathProgramCache]: Analyzing trace with hash 999112674, now seen corresponding path program 1 times [2023-11-06 22:42:25,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:25,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766130282] [2023-11-06 22:42:25,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:25,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:42:25,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:25,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766130282] [2023-11-06 22:42:25,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766130282] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:25,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:25,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:42:25,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118905939] [2023-11-06 22:42:25,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:25,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:42:25,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:25,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:42:25,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:42:25,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 174 [2023-11-06 22:42:25,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 15 transitions, 49 flow. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:25,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:25,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 174 [2023-11-06 22:42:25,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:25,581 INFO L124 PetriNetUnfolderBase]: 35/64 cut-off events. [2023-11-06 22:42:25,581 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-06 22:42:25,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 64 events. 35/64 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 123 event pairs, 3 based on Foata normal form. 10/74 useless extension candidates. Maximal degree in co-relation 45. Up to 49 conditions per place. [2023-11-06 22:42:25,583 INFO L140 encePairwiseOnDemand]: 171/174 looper letters, 18 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-11-06 22:42:25,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 21 transitions, 108 flow [2023-11-06 22:42:25,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:42:25,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:42:25,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2023-11-06 22:42:25,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49233716475095785 [2023-11-06 22:42:25,588 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2023-11-06 22:42:25,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2023-11-06 22:42:25,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:25,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2023-11-06 22:42:25,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:25,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:25,593 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:25,593 INFO L175 Difference]: Start difference. First operand has 17 places, 15 transitions, 49 flow. Second operand 3 states and 257 transitions. [2023-11-06 22:42:25,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 21 transitions, 108 flow [2023-11-06 22:42:25,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 21 transitions, 103 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:42:25,595 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 61 flow [2023-11-06 22:42:25,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=19, PETRI_TRANSITIONS=16} [2023-11-06 22:42:25,596 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 1 predicate places. [2023-11-06 22:42:25,596 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 61 flow [2023-11-06 22:42:25,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:25,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:25,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:25,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:42:25,598 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 22:42:25,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:25,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1204223593, now seen corresponding path program 1 times [2023-11-06 22:42:25,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:25,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448049565] [2023-11-06 22:42:25,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:25,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:25,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:42:25,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:25,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448049565] [2023-11-06 22:42:25,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448049565] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:25,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:25,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:42:25,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754566656] [2023-11-06 22:42:25,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:25,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:42:25,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:25,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:42:25,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:42:25,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 174 [2023-11-06 22:42:25,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:25,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:25,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 174 [2023-11-06 22:42:25,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:25,756 INFO L124 PetriNetUnfolderBase]: 40/73 cut-off events. [2023-11-06 22:42:25,757 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-11-06 22:42:25,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 73 events. 40/73 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 130 event pairs, 6 based on Foata normal form. 8/81 useless extension candidates. Maximal degree in co-relation 142. Up to 49 conditions per place. [2023-11-06 22:42:25,758 INFO L140 encePairwiseOnDemand]: 171/174 looper letters, 19 selfloop transitions, 3 changer transitions 0/22 dead transitions. [2023-11-06 22:42:25,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 22 transitions, 126 flow [2023-11-06 22:42:25,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:42:25,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:42:25,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2023-11-06 22:42:25,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49233716475095785 [2023-11-06 22:42:25,761 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2023-11-06 22:42:25,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2023-11-06 22:42:25,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:25,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2023-11-06 22:42:25,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:25,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:25,765 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:25,766 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 61 flow. Second operand 3 states and 257 transitions. [2023-11-06 22:42:25,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 22 transitions, 126 flow [2023-11-06 22:42:25,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 22 transitions, 123 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:42:25,768 INFO L231 Difference]: Finished difference. Result has 21 places, 17 transitions, 75 flow [2023-11-06 22:42:25,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=21, PETRI_TRANSITIONS=17} [2023-11-06 22:42:25,769 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 3 predicate places. [2023-11-06 22:42:25,769 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 17 transitions, 75 flow [2023-11-06 22:42:25,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:25,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:25,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:25,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:42:25,770 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 22:42:25,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:25,771 INFO L85 PathProgramCache]: Analyzing trace with hash -949751973, now seen corresponding path program 1 times [2023-11-06 22:42:25,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:25,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029208509] [2023-11-06 22:42:25,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:25,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:26,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:42:26,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:26,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029208509] [2023-11-06 22:42:26,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029208509] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:26,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806718953] [2023-11-06 22:42:26,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:26,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:26,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:26,184 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:26,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:42:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:26,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:42:26,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:26,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:42:26,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:42:26,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806718953] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:26,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:42:26,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-06 22:42:26,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894018098] [2023-11-06 22:42:26,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:26,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:42:26,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:26,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:42:26,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:42:26,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 174 [2023-11-06 22:42:26,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 75 flow. Second operand has 8 states, 8 states have (on average 66.375) internal successors, (531), 8 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:26,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:26,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 174 [2023-11-06 22:42:26,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:27,150 INFO L124 PetriNetUnfolderBase]: 65/116 cut-off events. [2023-11-06 22:42:27,150 INFO L125 PetriNetUnfolderBase]: For 75/75 co-relation queries the response was YES. [2023-11-06 22:42:27,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 396 conditions, 116 events. 65/116 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 263 event pairs, 0 based on Foata normal form. 20/136 useless extension candidates. Maximal degree in co-relation 124. Up to 61 conditions per place. [2023-11-06 22:42:27,157 INFO L140 encePairwiseOnDemand]: 169/174 looper letters, 40 selfloop transitions, 18 changer transitions 0/58 dead transitions. [2023-11-06 22:42:27,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 58 transitions, 349 flow [2023-11-06 22:42:27,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:42:27,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 22:42:27,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 871 transitions. [2023-11-06 22:42:27,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3850574712643678 [2023-11-06 22:42:27,162 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 871 transitions. [2023-11-06 22:42:27,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 871 transitions. [2023-11-06 22:42:27,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:27,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 871 transitions. [2023-11-06 22:42:27,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 67.0) internal successors, (871), 13 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:27,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 174.0) internal successors, (2436), 14 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:27,175 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 174.0) internal successors, (2436), 14 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:27,176 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 75 flow. Second operand 13 states and 871 transitions. [2023-11-06 22:42:27,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 58 transitions, 349 flow [2023-11-06 22:42:27,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 58 transitions, 345 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:42:27,180 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 218 flow [2023-11-06 22:42:27,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=218, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2023-11-06 22:42:27,182 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 20 predicate places. [2023-11-06 22:42:27,182 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 218 flow [2023-11-06 22:42:27,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 66.375) internal successors, (531), 8 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:27,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:27,186 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:27,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:27,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:27,403 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 22:42:27,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:27,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1697931504, now seen corresponding path program 2 times [2023-11-06 22:42:27,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:27,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509960500] [2023-11-06 22:42:27,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:27,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:28,244 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 22:42:28,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:28,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509960500] [2023-11-06 22:42:28,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509960500] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:28,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942143984] [2023-11-06 22:42:28,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:42:28,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:28,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:28,249 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:28,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:42:28,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:42:28,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:42:28,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:42:28,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:28,590 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 22:42:28,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:29,588 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 22:42:29,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942143984] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:29,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:42:29,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 15 [2023-11-06 22:42:29,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640549662] [2023-11-06 22:42:29,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:29,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:42:29,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:29,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:42:29,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:42:29,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 174 [2023-11-06 22:42:29,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 218 flow. Second operand has 17 states, 17 states have (on average 59.411764705882355) internal successors, (1010), 17 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:29,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:29,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 174 [2023-11-06 22:42:29,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:30,510 INFO L124 PetriNetUnfolderBase]: 238/395 cut-off events. [2023-11-06 22:42:30,510 INFO L125 PetriNetUnfolderBase]: For 1535/1535 co-relation queries the response was YES. [2023-11-06 22:42:30,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2014 conditions, 395 events. 238/395 cut-off events. For 1535/1535 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1365 event pairs, 3 based on Foata normal form. 14/409 useless extension candidates. Maximal degree in co-relation 916. Up to 183 conditions per place. [2023-11-06 22:42:30,517 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 51 selfloop transitions, 64 changer transitions 24/139 dead transitions. [2023-11-06 22:42:30,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 139 transitions, 1263 flow [2023-11-06 22:42:30,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:42:30,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:42:30,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1144 transitions. [2023-11-06 22:42:30,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3652618135376756 [2023-11-06 22:42:30,523 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1144 transitions. [2023-11-06 22:42:30,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1144 transitions. [2023-11-06 22:42:30,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:30,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1144 transitions. [2023-11-06 22:42:30,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 63.55555555555556) internal successors, (1144), 18 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:30,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 174.0) internal successors, (3306), 19 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:30,538 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 174.0) internal successors, (3306), 19 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:30,539 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 218 flow. Second operand 18 states and 1144 transitions. [2023-11-06 22:42:30,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 139 transitions, 1263 flow [2023-11-06 22:42:30,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 139 transitions, 1170 flow, removed 39 selfloop flow, removed 3 redundant places. [2023-11-06 22:42:30,554 INFO L231 Difference]: Finished difference. Result has 61 places, 76 transitions, 852 flow [2023-11-06 22:42:30,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=852, PETRI_PLACES=61, PETRI_TRANSITIONS=76} [2023-11-06 22:42:30,557 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 43 predicate places. [2023-11-06 22:42:30,561 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 76 transitions, 852 flow [2023-11-06 22:42:30,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 59.411764705882355) internal successors, (1010), 17 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:30,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:30,563 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:30,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:30,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:30,769 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 22:42:30,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:30,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1212106206, now seen corresponding path program 3 times [2023-11-06 22:42:30,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:30,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148208982] [2023-11-06 22:42:30,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:30,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:31,751 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 22:42:31,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:31,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148208982] [2023-11-06 22:42:31,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148208982] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:31,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862065494] [2023-11-06 22:42:31,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:42:31,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:31,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:31,754 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:31,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:42:31,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:42:31,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:42:31,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:42:31,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:32,107 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 22:42:32,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:33,341 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 22:42:33,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862065494] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:33,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:42:33,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-11-06 22:42:33,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079465734] [2023-11-06 22:42:33,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:33,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:42:33,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:33,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:42:33,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:42:33,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 174 [2023-11-06 22:42:33,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 76 transitions, 852 flow. Second operand has 17 states, 17 states have (on average 59.11764705882353) internal successors, (1005), 17 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:33,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:33,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 174 [2023-11-06 22:42:33,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:35,112 INFO L124 PetriNetUnfolderBase]: 481/782 cut-off events. [2023-11-06 22:42:35,113 INFO L125 PetriNetUnfolderBase]: For 6132/6132 co-relation queries the response was YES. [2023-11-06 22:42:35,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4987 conditions, 782 events. 481/782 cut-off events. For 6132/6132 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3243 event pairs, 7 based on Foata normal form. 10/792 useless extension candidates. Maximal degree in co-relation 4740. Up to 357 conditions per place. [2023-11-06 22:42:35,125 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 57 selfloop transitions, 131 changer transitions 52/240 dead transitions. [2023-11-06 22:42:35,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 240 transitions, 3108 flow [2023-11-06 22:42:35,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:42:35,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 22:42:35,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1373 transitions. [2023-11-06 22:42:35,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35867293625914315 [2023-11-06 22:42:35,133 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1373 transitions. [2023-11-06 22:42:35,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1373 transitions. [2023-11-06 22:42:35,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:35,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1373 transitions. [2023-11-06 22:42:35,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 62.40909090909091) internal successors, (1373), 22 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:35,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 174.0) internal successors, (4002), 23 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:35,189 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 174.0) internal successors, (4002), 23 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:35,189 INFO L175 Difference]: Start difference. First operand has 61 places, 76 transitions, 852 flow. Second operand 22 states and 1373 transitions. [2023-11-06 22:42:35,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 240 transitions, 3108 flow [2023-11-06 22:42:35,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 240 transitions, 2087 flow, removed 508 selfloop flow, removed 1 redundant places. [2023-11-06 22:42:35,231 INFO L231 Difference]: Finished difference. Result has 89 places, 150 transitions, 1525 flow [2023-11-06 22:42:35,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1525, PETRI_PLACES=89, PETRI_TRANSITIONS=150} [2023-11-06 22:42:35,234 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 71 predicate places. [2023-11-06 22:42:35,235 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 150 transitions, 1525 flow [2023-11-06 22:42:35,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 59.11764705882353) internal successors, (1005), 17 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:35,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:35,236 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:35,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:35,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:35,442 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 22:42:35,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:35,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1074235376, now seen corresponding path program 4 times [2023-11-06 22:42:35,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:35,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859483538] [2023-11-06 22:42:35,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:35,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:35,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:36,315 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 22:42:36,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:36,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859483538] [2023-11-06 22:42:36,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859483538] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:36,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091930510] [2023-11-06 22:42:36,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:42:36,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:36,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:36,319 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:36,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:42:36,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:42:36,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:42:36,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:42:36,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:36,632 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 22:42:36,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:37,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091930510] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:37,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:42:37,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-11-06 22:42:37,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962713975] [2023-11-06 22:42:37,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:37,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:42:37,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:37,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:42:37,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:42:37,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 174 [2023-11-06 22:42:37,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 150 transitions, 1525 flow. Second operand has 19 states, 19 states have (on average 57.89473684210526) internal successors, (1100), 19 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:37,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:37,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 174 [2023-11-06 22:42:37,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:42,098 INFO L124 PetriNetUnfolderBase]: 818/1387 cut-off events. [2023-11-06 22:42:42,098 INFO L125 PetriNetUnfolderBase]: For 12844/12844 co-relation queries the response was YES. [2023-11-06 22:42:42,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8105 conditions, 1387 events. 818/1387 cut-off events. For 12844/12844 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 6960 event pairs, 4 based on Foata normal form. 26/1397 useless extension candidates. Maximal degree in co-relation 7585. Up to 357 conditions per place. [2023-11-06 22:42:42,121 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 133 selfloop transitions, 295 changer transitions 62/490 dead transitions. [2023-11-06 22:42:42,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 490 transitions, 5849 flow [2023-11-06 22:42:42,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-06 22:42:42,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-06 22:42:42,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2792 transitions. [2023-11-06 22:42:42,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3488255872063968 [2023-11-06 22:42:42,139 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2792 transitions. [2023-11-06 22:42:42,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2792 transitions. [2023-11-06 22:42:42,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:42,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2792 transitions. [2023-11-06 22:42:42,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 60.69565217391305) internal successors, (2792), 46 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:42,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 174.0) internal successors, (8178), 47 states have internal predecessors, (8178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:42,175 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 174.0) internal successors, (8178), 47 states have internal predecessors, (8178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:42,176 INFO L175 Difference]: Start difference. First operand has 89 places, 150 transitions, 1525 flow. Second operand 46 states and 2792 transitions. [2023-11-06 22:42:42,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 490 transitions, 5849 flow [2023-11-06 22:42:42,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 490 transitions, 5372 flow, removed 218 selfloop flow, removed 5 redundant places. [2023-11-06 22:42:42,316 INFO L231 Difference]: Finished difference. Result has 139 places, 354 transitions, 4451 flow [2023-11-06 22:42:42,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1361, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=4451, PETRI_PLACES=139, PETRI_TRANSITIONS=354} [2023-11-06 22:42:42,317 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 121 predicate places. [2023-11-06 22:42:42,317 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 354 transitions, 4451 flow [2023-11-06 22:42:42,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 57.89473684210526) internal successors, (1100), 19 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:42,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:42,318 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:42,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:42,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:42,525 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 22:42:42,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:42,525 INFO L85 PathProgramCache]: Analyzing trace with hash -536705582, now seen corresponding path program 5 times [2023-11-06 22:42:42,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:42,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132484223] [2023-11-06 22:42:42,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:42,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:43,109 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 22:42:43,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:43,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132484223] [2023-11-06 22:42:43,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132484223] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:43,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879528182] [2023-11-06 22:42:43,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:42:43,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:43,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:43,117 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:43,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:42:43,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:42:43,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:42:43,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:42:43,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:43,395 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 22:42:43,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:44,068 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 22:42:44,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879528182] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:44,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:42:44,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-11-06 22:42:44,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138262856] [2023-11-06 22:42:44,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:44,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:42:44,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:44,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:42:44,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:42:44,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 174 [2023-11-06 22:42:44,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 354 transitions, 4451 flow. Second operand has 17 states, 17 states have (on average 59.1764705882353) internal successors, (1006), 17 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:44,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:44,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 174 [2023-11-06 22:42:44,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:46,292 INFO L124 PetriNetUnfolderBase]: 1369/2230 cut-off events. [2023-11-06 22:42:46,293 INFO L125 PetriNetUnfolderBase]: For 19247/19247 co-relation queries the response was YES. [2023-11-06 22:42:46,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14335 conditions, 2230 events. 1369/2230 cut-off events. For 19247/19247 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 11873 event pairs, 6 based on Foata normal form. 45/2275 useless extension candidates. Maximal degree in co-relation 14231. Up to 563 conditions per place. [2023-11-06 22:42:46,328 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 169 selfloop transitions, 559 changer transitions 75/803 dead transitions. [2023-11-06 22:42:46,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 803 transitions, 11154 flow [2023-11-06 22:42:46,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-06 22:42:46,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-06 22:42:46,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2357 transitions. [2023-11-06 22:42:46,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3564730792498488 [2023-11-06 22:42:46,337 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2357 transitions. [2023-11-06 22:42:46,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2357 transitions. [2023-11-06 22:42:46,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:46,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2357 transitions. [2023-11-06 22:42:46,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 62.026315789473685) internal successors, (2357), 38 states have internal predecessors, (2357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:46,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 174.0) internal successors, (6786), 39 states have internal predecessors, (6786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:46,367 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 174.0) internal successors, (6786), 39 states have internal predecessors, (6786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:46,367 INFO L175 Difference]: Start difference. First operand has 139 places, 354 transitions, 4451 flow. Second operand 38 states and 2357 transitions. [2023-11-06 22:42:46,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 803 transitions, 11154 flow [2023-11-06 22:42:46,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 803 transitions, 9310 flow, removed 888 selfloop flow, removed 13 redundant places. [2023-11-06 22:42:46,695 INFO L231 Difference]: Finished difference. Result has 171 places, 682 transitions, 8710 flow [2023-11-06 22:42:46,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=3496, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=8710, PETRI_PLACES=171, PETRI_TRANSITIONS=682} [2023-11-06 22:42:46,699 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 153 predicate places. [2023-11-06 22:42:46,700 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 682 transitions, 8710 flow [2023-11-06 22:42:46,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 59.1764705882353) internal successors, (1006), 17 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:46,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:46,701 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:46,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:46,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:46,908 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 22:42:46,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:46,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2026429821, now seen corresponding path program 6 times [2023-11-06 22:42:46,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:46,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634834287] [2023-11-06 22:42:46,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:46,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:47,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:42:47,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:47,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634834287] [2023-11-06 22:42:47,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634834287] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:47,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483851332] [2023-11-06 22:42:47,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:42:47,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:47,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:47,288 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:47,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:42:47,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:42:47,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:42:47,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:42:47,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:47,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:42:47,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:48,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:42:48,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483851332] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:48,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:42:48,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2023-11-06 22:42:48,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105866502] [2023-11-06 22:42:48,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:48,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:42:48,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:48,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:42:48,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:42:48,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 174 [2023-11-06 22:42:48,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 682 transitions, 8710 flow. Second operand has 14 states, 14 states have (on average 64.42857142857143) internal successors, (902), 14 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:48,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:48,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 174 [2023-11-06 22:42:48,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:48,903 INFO L124 PetriNetUnfolderBase]: 979/1597 cut-off events. [2023-11-06 22:42:48,903 INFO L125 PetriNetUnfolderBase]: For 5416/5416 co-relation queries the response was YES. [2023-11-06 22:42:48,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10292 conditions, 1597 events. 979/1597 cut-off events. For 5416/5416 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 7897 event pairs, 0 based on Foata normal form. 178/1775 useless extension candidates. Maximal degree in co-relation 10076. Up to 464 conditions per place. [2023-11-06 22:42:48,928 INFO L140 encePairwiseOnDemand]: 169/174 looper letters, 201 selfloop transitions, 409 changer transitions 1/611 dead transitions. [2023-11-06 22:42:48,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 611 transitions, 8885 flow [2023-11-06 22:42:48,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:42:48,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:42:48,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 661 transitions. [2023-11-06 22:42:48,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798850574712644 [2023-11-06 22:42:48,931 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 661 transitions. [2023-11-06 22:42:48,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 661 transitions. [2023-11-06 22:42:48,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:48,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 661 transitions. [2023-11-06 22:42:48,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 66.1) internal successors, (661), 10 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:48,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:48,937 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:48,938 INFO L175 Difference]: Start difference. First operand has 171 places, 682 transitions, 8710 flow. Second operand 10 states and 661 transitions. [2023-11-06 22:42:48,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 611 transitions, 8885 flow [2023-11-06 22:42:49,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 611 transitions, 7753 flow, removed 269 selfloop flow, removed 17 redundant places. [2023-11-06 22:42:49,134 INFO L231 Difference]: Finished difference. Result has 153 places, 599 transitions, 7480 flow [2023-11-06 22:42:49,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=6303, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7480, PETRI_PLACES=153, PETRI_TRANSITIONS=599} [2023-11-06 22:42:49,136 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 135 predicate places. [2023-11-06 22:42:49,136 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 599 transitions, 7480 flow [2023-11-06 22:42:49,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 64.42857142857143) internal successors, (902), 14 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:49,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:49,137 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:49,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:49,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:49,343 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 22:42:49,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:49,344 INFO L85 PathProgramCache]: Analyzing trace with hash -2128322844, now seen corresponding path program 7 times [2023-11-06 22:42:49,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:49,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615341643] [2023-11-06 22:42:49,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:49,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:42:49,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:49,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615341643] [2023-11-06 22:42:49,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615341643] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:49,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095166783] [2023-11-06 22:42:49,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:42:49,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:49,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:49,732 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:49,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:42:49,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:49,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:42:49,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:42:49,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:50,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:42:50,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095166783] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:50,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:42:50,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 11 [2023-11-06 22:42:50,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86331445] [2023-11-06 22:42:50,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:50,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:42:50,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:50,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:42:50,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:42:50,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 174 [2023-11-06 22:42:50,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 599 transitions, 7480 flow. Second operand has 12 states, 12 states have (on average 73.91666666666667) internal successors, (887), 12 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:50,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:50,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 174 [2023-11-06 22:42:50,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:50,668 INFO L124 PetriNetUnfolderBase]: 742/1253 cut-off events. [2023-11-06 22:42:50,669 INFO L125 PetriNetUnfolderBase]: For 3731/3731 co-relation queries the response was YES. [2023-11-06 22:42:50,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7343 conditions, 1253 events. 742/1253 cut-off events. For 3731/3731 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 6168 event pairs, 9 based on Foata normal form. 174/1427 useless extension candidates. Maximal degree in co-relation 7104. Up to 509 conditions per place. [2023-11-06 22:42:50,689 INFO L140 encePairwiseOnDemand]: 171/174 looper letters, 238 selfloop transitions, 229 changer transitions 14/481 dead transitions. [2023-11-06 22:42:50,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 481 transitions, 6475 flow [2023-11-06 22:42:50,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:42:50,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:42:50,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 454 transitions. [2023-11-06 22:42:50,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43486590038314177 [2023-11-06 22:42:50,691 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 454 transitions. [2023-11-06 22:42:50,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 454 transitions. [2023-11-06 22:42:50,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:50,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 454 transitions. [2023-11-06 22:42:50,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 75.66666666666667) internal successors, (454), 6 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:50,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 174.0) internal successors, (1218), 7 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:50,696 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 174.0) internal successors, (1218), 7 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:50,696 INFO L175 Difference]: Start difference. First operand has 153 places, 599 transitions, 7480 flow. Second operand 6 states and 454 transitions. [2023-11-06 22:42:50,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 481 transitions, 6475 flow [2023-11-06 22:42:50,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 481 transitions, 5988 flow, removed 59 selfloop flow, removed 9 redundant places. [2023-11-06 22:42:50,787 INFO L231 Difference]: Finished difference. Result has 148 places, 462 transitions, 5298 flow [2023-11-06 22:42:50,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=5010, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5298, PETRI_PLACES=148, PETRI_TRANSITIONS=462} [2023-11-06 22:42:50,789 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 130 predicate places. [2023-11-06 22:42:50,789 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 462 transitions, 5298 flow [2023-11-06 22:42:50,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 73.91666666666667) internal successors, (887), 12 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:50,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:50,790 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:50,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:50,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:42:50,993 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 22:42:50,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:50,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1239866216, now seen corresponding path program 8 times [2023-11-06 22:42:50,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:50,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530122075] [2023-11-06 22:42:50,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:50,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:51,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:51,872 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:51,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:51,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530122075] [2023-11-06 22:42:51,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530122075] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:51,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044271916] [2023-11-06 22:42:51,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:42:51,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:51,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:51,875 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:51,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:42:51,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:42:51,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:42:51,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:42:51,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:52,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:53,079 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:53,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044271916] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:53,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:42:53,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-11-06 22:42:53,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077100009] [2023-11-06 22:42:53,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:53,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:42:53,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:53,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:42:53,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:42:53,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 174 [2023-11-06 22:42:53,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 462 transitions, 5298 flow. Second operand has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:53,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:53,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 174 [2023-11-06 22:42:53,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:54,946 INFO L124 PetriNetUnfolderBase]: 920/1580 cut-off events. [2023-11-06 22:42:54,946 INFO L125 PetriNetUnfolderBase]: For 1934/1934 co-relation queries the response was YES. [2023-11-06 22:42:54,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9183 conditions, 1580 events. 920/1580 cut-off events. For 1934/1934 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 8310 event pairs, 5 based on Foata normal form. 3/1583 useless extension candidates. Maximal degree in co-relation 8933. Up to 523 conditions per place. [2023-11-06 22:42:54,971 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 239 selfloop transitions, 362 changer transitions 32/633 dead transitions. [2023-11-06 22:42:54,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 633 transitions, 8191 flow [2023-11-06 22:42:54,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:42:54,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-06 22:42:54,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1556 transitions. [2023-11-06 22:42:54,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34394341290893016 [2023-11-06 22:42:54,976 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1556 transitions. [2023-11-06 22:42:54,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1556 transitions. [2023-11-06 22:42:54,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:54,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1556 transitions. [2023-11-06 22:42:54,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 59.84615384615385) internal successors, (1556), 26 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 22:42:54,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:54,990 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:54,990 INFO L175 Difference]: Start difference. First operand has 148 places, 462 transitions, 5298 flow. Second operand 26 states and 1556 transitions. [2023-11-06 22:42:54,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 633 transitions, 8191 flow [2023-11-06 22:42:55,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 633 transitions, 7533 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-11-06 22:42:55,078 INFO L231 Difference]: Finished difference. Result has 177 places, 562 transitions, 7086 flow [2023-11-06 22:42:55,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=4782, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7086, PETRI_PLACES=177, PETRI_TRANSITIONS=562} [2023-11-06 22:42:55,079 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 159 predicate places. [2023-11-06 22:42:55,079 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 562 transitions, 7086 flow [2023-11-06 22:42:55,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:55,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:55,080 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:55,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:55,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:42:55,287 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 22:42:55,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:55,287 INFO L85 PathProgramCache]: Analyzing trace with hash -740983698, now seen corresponding path program 9 times [2023-11-06 22:42:55,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:55,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298474255] [2023-11-06 22:42:55,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:55,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:56,197 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:56,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:56,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298474255] [2023-11-06 22:42:56,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298474255] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:56,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869782745] [2023-11-06 22:42:56,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:42:56,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:56,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:56,199 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:56,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:42:56,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:42:56,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:42:56,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:42:56,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:56,578 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:56,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:57,233 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:57,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869782745] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:57,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:42:57,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-06 22:42:57,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349458922] [2023-11-06 22:42:57,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:57,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:42:57,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:57,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:42:57,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:42:57,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 174 [2023-11-06 22:42:57,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 562 transitions, 7086 flow. Second operand has 23 states, 23 states have (on average 57.65217391304348) internal successors, (1326), 23 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:57,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:57,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 174 [2023-11-06 22:42:57,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:58,924 INFO L124 PetriNetUnfolderBase]: 1079/1857 cut-off events. [2023-11-06 22:42:58,924 INFO L125 PetriNetUnfolderBase]: For 2673/2673 co-relation queries the response was YES. [2023-11-06 22:42:58,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11869 conditions, 1857 events. 1079/1857 cut-off events. For 2673/2673 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 10178 event pairs, 9 based on Foata normal form. 14/1857 useless extension candidates. Maximal degree in co-relation 11829. Up to 575 conditions per place. [2023-11-06 22:42:58,936 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 0 selfloop transitions, 0 changer transitions 721/721 dead transitions. [2023-11-06 22:42:58,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 721 transitions, 10386 flow [2023-11-06 22:42:58,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:42:58,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 22:42:58,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1198 transitions. [2023-11-06 22:42:58,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3442528735632184 [2023-11-06 22:42:58,945 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1198 transitions. [2023-11-06 22:42:58,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1198 transitions. [2023-11-06 22:42:58,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:58,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1198 transitions. [2023-11-06 22:42:58,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 59.9) internal successors, (1198), 20 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:58,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:58,957 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:58,957 INFO L175 Difference]: Start difference. First operand has 177 places, 562 transitions, 7086 flow. Second operand 20 states and 1198 transitions. [2023-11-06 22:42:58,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 721 transitions, 10386 flow [2023-11-06 22:42:59,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 721 transitions, 10004 flow, removed 90 selfloop flow, removed 6 redundant places. [2023-11-06 22:42:59,077 INFO L231 Difference]: Finished difference. Result has 186 places, 0 transitions, 0 flow [2023-11-06 22:42:59,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=6812, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=0, PETRI_PLACES=186, PETRI_TRANSITIONS=0} [2023-11-06 22:42:59,078 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 168 predicate places. [2023-11-06 22:42:59,078 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 0 transitions, 0 flow [2023-11-06 22:42:59,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 57.65217391304348) internal successors, (1326), 23 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:59,081 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-06 22:42:59,082 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-06 22:42:59,082 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-06 22:42:59,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:59,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:42:59,288 INFO L445 BasicCegarLoop]: Path program histogram: [9, 1, 1, 1] [2023-11-06 22:42:59,292 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-06 22:42:59,292 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-06 22:42:59,296 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:42:59 BasicIcfg [2023-11-06 22:42:59,298 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-06 22:42:59,298 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 22:42:59,299 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 22:42:59,299 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 22:42:59,299 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:42:20" (3/4) ... [2023-11-06 22:42:59,301 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-06 22:42:59,306 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-11-06 22:42:59,306 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-11-06 22:42:59,313 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2023-11-06 22:42:59,313 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-06 22:42:59,314 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-06 22:42:59,314 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-06 22:42:59,368 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.graphml [2023-11-06 22:42:59,368 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.yaml [2023-11-06 22:42:59,368 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 22:42:59,369 INFO L158 Benchmark]: Toolchain (without parser) took 40222.18ms. Allocated memory was 169.9MB in the beginning and 528.5MB in the end (delta: 358.6MB). Free memory was 132.8MB in the beginning and 295.3MB in the end (delta: -162.6MB). Peak memory consumption was 195.5MB. Max. memory is 16.1GB. [2023-11-06 22:42:59,369 INFO L158 Benchmark]: CDTParser took 0.42ms. Allocated memory is still 121.6MB. Free memory is still 91.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:42:59,370 INFO L158 Benchmark]: CACSL2BoogieTranslator took 365.58ms. Allocated memory is still 169.9MB. Free memory was 132.8MB in the beginning and 139.0MB in the end (delta: -6.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:42:59,370 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.66ms. Allocated memory is still 169.9MB. Free memory was 139.0MB in the beginning and 137.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:42:59,371 INFO L158 Benchmark]: Boogie Preprocessor took 28.35ms. Allocated memory is still 169.9MB. Free memory was 137.8MB in the beginning and 136.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 22:42:59,371 INFO L158 Benchmark]: RCFGBuilder took 430.87ms. Allocated memory is still 169.9MB. Free memory was 136.5MB in the beginning and 122.7MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-06 22:42:59,372 INFO L158 Benchmark]: TraceAbstraction took 39283.83ms. Allocated memory was 169.9MB in the beginning and 528.5MB in the end (delta: 358.6MB). Free memory was 121.8MB in the beginning and 298.5MB in the end (delta: -176.7MB). Peak memory consumption was 184.3MB. Max. memory is 16.1GB. [2023-11-06 22:42:59,372 INFO L158 Benchmark]: Witness Printer took 70.05ms. Allocated memory is still 528.5MB. Free memory was 298.5MB in the beginning and 295.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 22:42:59,374 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42ms. Allocated memory is still 121.6MB. Free memory is still 91.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 365.58ms. Allocated memory is still 169.9MB. Free memory was 132.8MB in the beginning and 139.0MB in the end (delta: -6.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.66ms. Allocated memory is still 169.9MB. Free memory was 139.0MB in the beginning and 137.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 28.35ms. Allocated memory is still 169.9MB. Free memory was 137.8MB in the beginning and 136.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 430.87ms. Allocated memory is still 169.9MB. Free memory was 136.5MB in the beginning and 122.7MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 39283.83ms. Allocated memory was 169.9MB in the beginning and 528.5MB in the end (delta: 358.6MB). Free memory was 121.8MB in the beginning and 298.5MB in the end (delta: -176.7MB). Peak memory consumption was 184.3MB. Max. memory is 16.1GB. * Witness Printer took 70.05ms. Allocated memory is still 528.5MB. Free memory was 298.5MB in the beginning and 295.3MB in the end (delta: 3.1MB). 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: 4.4s, 78 PlacesBefore, 18 PlacesAfterwards, 82 TransitionsBefore, 13 TransitionsAfterwards, 1188 CoEnabledTransitionPairs, 5 FixpointIterations, 29 TrivialSequentialCompositions, 34 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 6 ConcurrentYvCompositions, 9 ChoiceCompositions, 81 TotalNumberOfCompositions, 1134 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1089, independent: 1082, independent conditional: 0, independent unconditional: 1082, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 614, independent: 609, independent conditional: 0, independent unconditional: 609, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1089, independent: 473, independent conditional: 0, independent unconditional: 473, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 614, unknown conditional: 0, unknown unconditional: 614] , Statistics on independence cache: Total cache size (in pairs): 13, Positive cache size: 13, Positive conditional cache size: 0, Positive unconditional cache size: 13, 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: 101]: 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, 113 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: 39.1s, OverallIterations: 12, TraceHistogramMax: 4, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 16.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1564 SdHoareTripleChecker+Valid, 4.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1474 mSDsluCounter, 858 SdHoareTripleChecker+Invalid, 3.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 829 mSDsCounter, 566 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4070 IncrementalHoareTripleChecker+Invalid, 4636 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 566 mSolverCounterUnsat, 29 mSDtfsCounter, 4070 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 457 GetRequests, 179 SyntacticMatches, 4 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3003 ImplicationChecksByTransitivity, 8.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8710occurred in iteration=8, InterpolantAutomatonStates: 208, 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: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 14.3s InterpolantComputationTime, 313 NumberOfCodeBlocks, 313 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 422 ConstructedInterpolants, 0 QuantifiedInterpolants, 4065 SizeOfPredicates, 51 NumberOfNonLiveVariables, 940 ConjunctsInSsa, 115 ConjunctsInUnsatCore, 30 InterpolantComputations, 3 PerfectInterpolantSequences, 28/212 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 22:42:59,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37574fb-b0d6-4a36-b68c-ac02d093170d/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