./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/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_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/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_683fb284-c21f-4657-bdd6-655ac6967fc9/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 5bf746ef76f8c8352051d8eb5f02d7a475e14d238622e290fcb51135a3348206 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:09:28,844 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:09:28,962 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:09:28,970 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:09:28,971 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:09:29,007 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:09:29,009 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:09:29,009 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:09:29,010 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:09:29,016 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:09:29,017 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:09:29,018 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:09:29,018 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:09:29,020 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:09:29,021 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:09:29,021 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:09:29,021 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:09:29,022 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:09:29,022 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:09:29,023 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:09:29,023 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:09:29,024 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:09:29,024 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:09:29,025 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:09:29,025 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:09:29,026 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:09:29,026 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:09:29,027 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:09:29,027 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:09:29,028 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:09:29,029 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:09:29,029 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:09:29,030 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:09:29,030 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:09:29,030 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:09:29,030 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:09:29,031 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:09:29,031 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:09:29,031 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:09:29,031 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_683fb284-c21f-4657-bdd6-655ac6967fc9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf746ef76f8c8352051d8eb5f02d7a475e14d238622e290fcb51135a3348206 [2023-11-06 22:09:29,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:09:29,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:09:29,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:09:29,415 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:09:29,415 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:09:29,417 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c [2023-11-06 22:09:32,541 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:09:32,771 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:09:32,772 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c [2023-11-06 22:09:32,782 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/data/a0fb5e815/3863be5514524ad79a5d670376cda3c4/FLAG4c61cea7a [2023-11-06 22:09:32,798 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/data/a0fb5e815/3863be5514524ad79a5d670376cda3c4 [2023-11-06 22:09:32,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:09:32,802 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:09:32,804 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:09:32,804 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:09:32,810 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:09:32,811 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:09:32" (1/1) ... [2023-11-06 22:09:32,812 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15791ca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:32, skipping insertion in model container [2023-11-06 22:09:32,812 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:09:32" (1/1) ... [2023-11-06 22:09:32,856 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:09:33,170 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_683fb284-c21f-4657-bdd6-655ac6967fc9/sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c[6687,6700] [2023-11-06 22:09:33,192 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:09:33,208 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:09:33,275 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_683fb284-c21f-4657-bdd6-655ac6967fc9/sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c[6687,6700] [2023-11-06 22:09:33,288 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:09:33,299 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:09:33,301 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:09:33,309 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:09:33,310 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:33 WrapperNode [2023-11-06 22:09:33,310 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:09:33,311 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:09:33,312 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:09:33,313 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:09:33,324 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:33" (1/1) ... [2023-11-06 22:09:33,346 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:33" (1/1) ... [2023-11-06 22:09:33,407 INFO L138 Inliner]: procedures = 26, calls = 93, calls flagged for inlining = 27, calls inlined = 33, statements flattened = 481 [2023-11-06 22:09:33,410 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:09:33,411 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:09:33,411 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:09:33,412 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:09:33,422 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:33" (1/1) ... [2023-11-06 22:09:33,422 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:33" (1/1) ... [2023-11-06 22:09:33,441 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:33" (1/1) ... [2023-11-06 22:09:33,447 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:33" (1/1) ... [2023-11-06 22:09:33,485 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:33" (1/1) ... [2023-11-06 22:09:33,491 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:33" (1/1) ... [2023-11-06 22:09:33,494 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:33" (1/1) ... [2023-11-06 22:09:33,512 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:33" (1/1) ... [2023-11-06 22:09:33,517 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:09:33,518 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:09:33,518 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:09:33,518 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:09:33,519 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:33" (1/1) ... [2023-11-06 22:09:33,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:09:33,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:33,566 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:09:33,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:09:33,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:09:33,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:09:33,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:09:33,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:09:33,616 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:09:33,619 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:09:33,619 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:09:33,619 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:09:33,619 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:09:33,620 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:09:33,620 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-06 22:09:33,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-06 22:09:33,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:09:33,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:09:33,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:09:33,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:09:33,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:09:33,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:09:33,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:09:33,627 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 22:09:33,781 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:09:33,784 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:09:34,637 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:09:34,907 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:09:34,907 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-06 22:09:34,911 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:09:34 BoogieIcfgContainer [2023-11-06 22:09:34,911 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:09:34,915 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:09:34,916 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:09:34,920 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:09:34,920 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:09:32" (1/3) ... [2023-11-06 22:09:34,921 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d36b852 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:09:34, skipping insertion in model container [2023-11-06 22:09:34,922 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:33" (2/3) ... [2023-11-06 22:09:34,924 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d36b852 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:09:34, skipping insertion in model container [2023-11-06 22:09:34,924 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:09:34" (3/3) ... [2023-11-06 22:09:34,926 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-2.wvr-bad.c [2023-11-06 22:09:34,935 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:09:34,947 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:09:34,947 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:09:34,947 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:09:35,068 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-06 22:09:35,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 350 places, 374 transitions, 776 flow [2023-11-06 22:09:35,345 INFO L124 PetriNetUnfolderBase]: 37/370 cut-off events. [2023-11-06 22:09:35,345 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:09:35,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 370 events. 37/370 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 257 event pairs, 0 based on Foata normal form. 0/332 useless extension candidates. Maximal degree in co-relation 325. Up to 8 conditions per place. [2023-11-06 22:09:35,355 INFO L82 GeneralOperation]: Start removeDead. Operand has 350 places, 374 transitions, 776 flow [2023-11-06 22:09:35,366 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 333 places, 357 transitions, 738 flow [2023-11-06 22:09:35,372 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:09:35,388 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 333 places, 357 transitions, 738 flow [2023-11-06 22:09:35,392 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 333 places, 357 transitions, 738 flow [2023-11-06 22:09:35,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 357 transitions, 738 flow [2023-11-06 22:09:35,482 INFO L124 PetriNetUnfolderBase]: 37/357 cut-off events. [2023-11-06 22:09:35,482 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:09:35,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 357 events. 37/357 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 255 event pairs, 0 based on Foata normal form. 0/320 useless extension candidates. Maximal degree in co-relation 325. Up to 8 conditions per place. [2023-11-06 22:09:35,491 INFO L119 LiptonReduction]: Number of co-enabled transitions 5712 [2023-11-06 22:09:53,773 INFO L134 LiptonReduction]: Checked pairs total: 5636 [2023-11-06 22:09:53,773 INFO L136 LiptonReduction]: Total number of compositions: 392 [2023-11-06 22:09:53,789 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:09:53,796 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;@4067420f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:09:53,797 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-06 22:09:53,808 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:09:53,809 INFO L124 PetriNetUnfolderBase]: 8/32 cut-off events. [2023-11-06 22:09:53,809 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:09:53,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:53,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:53,810 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 22:09:53,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:53,816 INFO L85 PathProgramCache]: Analyzing trace with hash 256840574, now seen corresponding path program 1 times [2023-11-06 22:09:53,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:53,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378857305] [2023-11-06 22:09:53,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:53,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:54,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:54,487 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 22:09:54,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:54,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378857305] [2023-11-06 22:09:54,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378857305] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:09:54,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:09:54,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:09:54,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920519536] [2023-11-06 22:09:54,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:09:54,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:09:54,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:54,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:09:54,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:09:54,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 766 [2023-11-06 22:09:54,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 342.3333333333333) internal successors, (1027), 3 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:54,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:54,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 766 [2023-11-06 22:09:54,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:55,033 INFO L124 PetriNetUnfolderBase]: 501/685 cut-off events. [2023-11-06 22:09:55,033 INFO L125 PetriNetUnfolderBase]: For 75/75 co-relation queries the response was YES. [2023-11-06 22:09:55,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464 conditions, 685 events. 501/685 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1783 event pairs, 117 based on Foata normal form. 1/418 useless extension candidates. Maximal degree in co-relation 1016. Up to 471 conditions per place. [2023-11-06 22:09:55,043 INFO L140 encePairwiseOnDemand]: 760/766 looper letters, 49 selfloop transitions, 5 changer transitions 1/55 dead transitions. [2023-11-06 22:09:55,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 265 flow [2023-11-06 22:09:55,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:09:55,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:09:55,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1058 transitions. [2023-11-06 22:09:55,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46040034812880765 [2023-11-06 22:09:55,072 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1058 transitions. [2023-11-06 22:09:55,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1058 transitions. [2023-11-06 22:09:55,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:55,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1058 transitions. [2023-11-06 22:09:55,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 352.6666666666667) internal successors, (1058), 3 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:55,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:55,104 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:55,106 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 90 flow. Second operand 3 states and 1058 transitions. [2023-11-06 22:09:55,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 265 flow [2023-11-06 22:09:55,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 55 transitions, 235 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-06 22:09:55,116 INFO L231 Difference]: Finished difference. Result has 33 places, 37 transitions, 107 flow [2023-11-06 22:09:55,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=33, PETRI_TRANSITIONS=37} [2023-11-06 22:09:55,125 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-11-06 22:09:55,125 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 37 transitions, 107 flow [2023-11-06 22:09:55,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 342.3333333333333) internal successors, (1027), 3 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:55,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:55,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:55,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:09:55,128 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 22:09:55,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:55,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1262694369, now seen corresponding path program 1 times [2023-11-06 22:09:55,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:55,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557195485] [2023-11-06 22:09:55,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:55,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:55,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:55,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:55,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:55,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557195485] [2023-11-06 22:09:55,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557195485] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:09:55,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:09:55,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:09:55,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198327228] [2023-11-06 22:09:55,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:09:55,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:09:55,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:55,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:09:55,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:09:55,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 766 [2023-11-06 22:09:55,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 37 transitions, 107 flow. Second operand has 4 states, 4 states have (on average 314.5) internal successors, (1258), 4 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:55,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:55,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 766 [2023-11-06 22:09:55,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:56,530 INFO L124 PetriNetUnfolderBase]: 944/1315 cut-off events. [2023-11-06 22:09:56,530 INFO L125 PetriNetUnfolderBase]: For 466/466 co-relation queries the response was YES. [2023-11-06 22:09:56,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3397 conditions, 1315 events. 944/1315 cut-off events. For 466/466 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3905 event pairs, 526 based on Foata normal form. 60/1364 useless extension candidates. Maximal degree in co-relation 898. Up to 686 conditions per place. [2023-11-06 22:09:56,541 INFO L140 encePairwiseOnDemand]: 756/766 looper letters, 68 selfloop transitions, 9 changer transitions 0/77 dead transitions. [2023-11-06 22:09:56,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 77 transitions, 366 flow [2023-11-06 22:09:56,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:09:56,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:09:56,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1611 transitions. [2023-11-06 22:09:56,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4206266318537859 [2023-11-06 22:09:56,552 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1611 transitions. [2023-11-06 22:09:56,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1611 transitions. [2023-11-06 22:09:56,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:56,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1611 transitions. [2023-11-06 22:09:56,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 322.2) internal successors, (1611), 5 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:56,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 766.0) internal successors, (4596), 6 states have internal predecessors, (4596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:56,574 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 766.0) internal successors, (4596), 6 states have internal predecessors, (4596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:56,575 INFO L175 Difference]: Start difference. First operand has 33 places, 37 transitions, 107 flow. Second operand 5 states and 1611 transitions. [2023-11-06 22:09:56,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 77 transitions, 366 flow [2023-11-06 22:09:56,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 77 transitions, 358 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:09:56,586 INFO L231 Difference]: Finished difference. Result has 39 places, 45 transitions, 172 flow [2023-11-06 22:09:56,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=39, PETRI_TRANSITIONS=45} [2023-11-06 22:09:56,587 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-11-06 22:09:56,588 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 45 transitions, 172 flow [2023-11-06 22:09:56,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 314.5) internal successors, (1258), 4 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:56,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:56,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:56,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:09:56,590 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 22:09:56,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:56,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1322482526, now seen corresponding path program 1 times [2023-11-06 22:09:56,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:56,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848845990] [2023-11-06 22:09:56,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:56,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:57,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:57,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848845990] [2023-11-06 22:09:57,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848845990] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:09:57,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:09:57,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:09:57,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615997415] [2023-11-06 22:09:57,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:09:57,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:09:57,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:57,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:09:57,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:09:57,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 327 out of 766 [2023-11-06 22:09:57,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 45 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 335.6666666666667) internal successors, (1007), 3 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:57,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:57,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 327 of 766 [2023-11-06 22:09:57,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:57,548 INFO L124 PetriNetUnfolderBase]: 876/1239 cut-off events. [2023-11-06 22:09:57,549 INFO L125 PetriNetUnfolderBase]: For 414/414 co-relation queries the response was YES. [2023-11-06 22:09:57,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3037 conditions, 1239 events. 876/1239 cut-off events. For 414/414 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4016 event pairs, 234 based on Foata normal form. 60/1295 useless extension candidates. Maximal degree in co-relation 1620. Up to 805 conditions per place. [2023-11-06 22:09:57,559 INFO L140 encePairwiseOnDemand]: 761/766 looper letters, 55 selfloop transitions, 4 changer transitions 1/60 dead transitions. [2023-11-06 22:09:57,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 60 transitions, 326 flow [2023-11-06 22:09:57,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:09:57,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:09:57,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1034 transitions. [2023-11-06 22:09:57,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44995648389904264 [2023-11-06 22:09:57,564 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1034 transitions. [2023-11-06 22:09:57,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1034 transitions. [2023-11-06 22:09:57,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:57,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1034 transitions. [2023-11-06 22:09:57,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 344.6666666666667) internal successors, (1034), 3 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:57,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:57,578 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:57,579 INFO L175 Difference]: Start difference. First operand has 39 places, 45 transitions, 172 flow. Second operand 3 states and 1034 transitions. [2023-11-06 22:09:57,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 60 transitions, 326 flow [2023-11-06 22:09:57,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 60 transitions, 322 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:09:57,582 INFO L231 Difference]: Finished difference. Result has 40 places, 44 transitions, 172 flow [2023-11-06 22:09:57,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=40, PETRI_TRANSITIONS=44} [2023-11-06 22:09:57,584 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-11-06 22:09:57,584 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 44 transitions, 172 flow [2023-11-06 22:09:57,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 335.6666666666667) internal successors, (1007), 3 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:57,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:57,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:57,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:09:57,586 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 22:09:57,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:57,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1481800672, now seen corresponding path program 1 times [2023-11-06 22:09:57,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:57,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632680389] [2023-11-06 22:09:57,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:57,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:57,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:57,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:57,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632680389] [2023-11-06 22:09:57,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632680389] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:09:57,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:09:57,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:09:57,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363045321] [2023-11-06 22:09:57,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:09:57,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:09:57,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:57,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:09:57,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:09:57,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 766 [2023-11-06 22:09:57,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 44 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 334.5) internal successors, (1338), 4 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:57,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:57,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 766 [2023-11-06 22:09:57,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:58,701 INFO L124 PetriNetUnfolderBase]: 1560/2219 cut-off events. [2023-11-06 22:09:58,701 INFO L125 PetriNetUnfolderBase]: For 1114/1114 co-relation queries the response was YES. [2023-11-06 22:09:58,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5462 conditions, 2219 events. 1560/2219 cut-off events. For 1114/1114 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8189 event pairs, 518 based on Foata normal form. 136/2351 useless extension candidates. Maximal degree in co-relation 2962. Up to 1007 conditions per place. [2023-11-06 22:09:58,719 INFO L140 encePairwiseOnDemand]: 763/766 looper letters, 77 selfloop transitions, 3 changer transitions 0/80 dead transitions. [2023-11-06 22:09:58,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 80 transitions, 432 flow [2023-11-06 22:09:58,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:09:58,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:09:58,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1383 transitions. [2023-11-06 22:09:58,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513707571801567 [2023-11-06 22:09:58,725 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1383 transitions. [2023-11-06 22:09:58,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1383 transitions. [2023-11-06 22:09:58,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:58,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1383 transitions. [2023-11-06 22:09:58,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 345.75) internal successors, (1383), 4 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:58,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 766.0) internal successors, (3830), 5 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:58,740 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 766.0) internal successors, (3830), 5 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:58,741 INFO L175 Difference]: Start difference. First operand has 40 places, 44 transitions, 172 flow. Second operand 4 states and 1383 transitions. [2023-11-06 22:09:58,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 80 transitions, 432 flow [2023-11-06 22:09:58,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 80 transitions, 426 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:09:58,746 INFO L231 Difference]: Finished difference. Result has 43 places, 45 transitions, 184 flow [2023-11-06 22:09:58,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=43, PETRI_TRANSITIONS=45} [2023-11-06 22:09:58,749 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2023-11-06 22:09:58,749 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 45 transitions, 184 flow [2023-11-06 22:09:58,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 334.5) internal successors, (1338), 4 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:58,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:58,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:58,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:09:58,751 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 22:09:58,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:58,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1735197488, now seen corresponding path program 1 times [2023-11-06 22:09:58,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:58,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780223242] [2023-11-06 22:09:58,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:58,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:58,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:58,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:58,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780223242] [2023-11-06 22:09:58,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780223242] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:09:58,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:09:58,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:09:58,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765523300] [2023-11-06 22:09:58,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:09:58,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:09:58,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:58,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:09:58,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:09:58,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 766 [2023-11-06 22:09:58,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 45 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 334.5) internal successors, (1338), 4 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:58,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:58,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 766 [2023-11-06 22:09:58,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:59,588 INFO L124 PetriNetUnfolderBase]: 1122/1623 cut-off events. [2023-11-06 22:09:59,588 INFO L125 PetriNetUnfolderBase]: For 1028/1028 co-relation queries the response was YES. [2023-11-06 22:09:59,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4257 conditions, 1623 events. 1122/1623 cut-off events. For 1028/1028 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5519 event pairs, 378 based on Foata normal form. 100/1719 useless extension candidates. Maximal degree in co-relation 3762. Up to 639 conditions per place. [2023-11-06 22:09:59,601 INFO L140 encePairwiseOnDemand]: 763/766 looper letters, 66 selfloop transitions, 3 changer transitions 7/76 dead transitions. [2023-11-06 22:09:59,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 76 transitions, 433 flow [2023-11-06 22:09:59,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:09:59,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:09:59,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1378 transitions. [2023-11-06 22:09:59,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497389033942559 [2023-11-06 22:09:59,606 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1378 transitions. [2023-11-06 22:09:59,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1378 transitions. [2023-11-06 22:09:59,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:59,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1378 transitions. [2023-11-06 22:09:59,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 344.5) internal successors, (1378), 4 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:59,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 766.0) internal successors, (3830), 5 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:59,621 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 766.0) internal successors, (3830), 5 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:59,621 INFO L175 Difference]: Start difference. First operand has 43 places, 45 transitions, 184 flow. Second operand 4 states and 1378 transitions. [2023-11-06 22:09:59,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 76 transitions, 433 flow [2023-11-06 22:09:59,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 76 transitions, 424 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-06 22:09:59,626 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 152 flow [2023-11-06 22:09:59,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2023-11-06 22:09:59,627 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 9 predicate places. [2023-11-06 22:09:59,628 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 152 flow [2023-11-06 22:09:59,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 334.5) internal successors, (1338), 4 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:59,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:59,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:59,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:09:59,630 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 22:09:59,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:59,631 INFO L85 PathProgramCache]: Analyzing trace with hash -549335913, now seen corresponding path program 1 times [2023-11-06 22:09:59,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:59,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911421332] [2023-11-06 22:09:59,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:59,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:59,852 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 22:09:59,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:59,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911421332] [2023-11-06 22:09:59,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911421332] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:09:59,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966132958] [2023-11-06 22:09:59,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:59,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:59,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:59,857 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:09:59,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:10:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:00,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:10:00,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:00,240 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 22:10:00,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:10:00,588 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:10:00,589 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 159 [2023-11-06 22:10:00,862 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 22:10:00,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966132958] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:10:00,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:10:00,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2023-11-06 22:10:00,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071530330] [2023-11-06 22:10:00,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:10:00,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:10:00,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:00,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:10:00,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:10:00,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 766 [2023-11-06 22:10:00,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 152 flow. Second operand has 6 states, 6 states have (on average 338.0) internal successors, (2028), 6 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:00,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:10:00,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 766 [2023-11-06 22:10:00,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:10:01,548 INFO L124 PetriNetUnfolderBase]: 1127/1593 cut-off events. [2023-11-06 22:10:01,549 INFO L125 PetriNetUnfolderBase]: For 1456/1456 co-relation queries the response was YES. [2023-11-06 22:10:01,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4333 conditions, 1593 events. 1127/1593 cut-off events. For 1456/1456 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5370 event pairs, 277 based on Foata normal form. 1/1592 useless extension candidates. Maximal degree in co-relation 4308. Up to 1205 conditions per place. [2023-11-06 22:10:01,563 INFO L140 encePairwiseOnDemand]: 762/766 looper letters, 57 selfloop transitions, 4 changer transitions 3/64 dead transitions. [2023-11-06 22:10:01,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 64 transitions, 352 flow [2023-11-06 22:10:01,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:10:01,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:10:01,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1377 transitions. [2023-11-06 22:10:01,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494125326370757 [2023-11-06 22:10:01,570 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1377 transitions. [2023-11-06 22:10:01,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1377 transitions. [2023-11-06 22:10:01,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:10:01,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1377 transitions. [2023-11-06 22:10:01,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 344.25) internal successors, (1377), 4 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:01,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 766.0) internal successors, (3830), 5 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:01,586 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 766.0) internal successors, (3830), 5 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:01,586 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 152 flow. Second operand 4 states and 1377 transitions. [2023-11-06 22:10:01,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 64 transitions, 352 flow [2023-11-06 22:10:01,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 64 transitions, 333 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-11-06 22:10:01,590 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 166 flow [2023-11-06 22:10:01,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-11-06 22:10:01,594 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2023-11-06 22:10:01,595 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 166 flow [2023-11-06 22:10:01,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 338.0) internal successors, (2028), 6 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:01,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:10:01,596 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:10:01,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 22:10:01,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:10:01,803 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 22:10:01,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:01,803 INFO L85 PathProgramCache]: Analyzing trace with hash 955085232, now seen corresponding path program 2 times [2023-11-06 22:10:01,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:01,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116343224] [2023-11-06 22:10:01,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:01,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:02,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:10:02,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:02,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116343224] [2023-11-06 22:10:02,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116343224] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:10:02,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348034371] [2023-11-06 22:10:02,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:10:02,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:02,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:02,319 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:02,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:10:02,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:10:02,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:10:02,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:10:02,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:10:02,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:10:03,087 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:10:03,088 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 212 treesize of output 226 [2023-11-06 22:10:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:10:03,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348034371] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:10:03,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:10:03,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-06 22:10:03,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711885697] [2023-11-06 22:10:03,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:10:03,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:10:03,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:03,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:10:03,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:10:04,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 766 [2023-11-06 22:10:04,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 166 flow. Second operand has 13 states, 13 states have (on average 282.84615384615387) internal successors, (3677), 13 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:04,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:10:04,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 766 [2023-11-06 22:10:04,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:10:06,026 INFO L124 PetriNetUnfolderBase]: 1818/2626 cut-off events. [2023-11-06 22:10:06,026 INFO L125 PetriNetUnfolderBase]: For 2676/2676 co-relation queries the response was YES. [2023-11-06 22:10:06,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7194 conditions, 2626 events. 1818/2626 cut-off events. For 2676/2676 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10376 event pairs, 456 based on Foata normal form. 180/2797 useless extension candidates. Maximal degree in co-relation 7170. Up to 984 conditions per place. [2023-11-06 22:10:06,047 INFO L140 encePairwiseOnDemand]: 753/766 looper letters, 87 selfloop transitions, 14 changer transitions 26/127 dead transitions. [2023-11-06 22:10:06,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 127 transitions, 663 flow [2023-11-06 22:10:06,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:10:06,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:10:06,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2895 transitions. [2023-11-06 22:10:06,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3779373368146214 [2023-11-06 22:10:06,059 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2895 transitions. [2023-11-06 22:10:06,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2895 transitions. [2023-11-06 22:10:06,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:10:06,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2895 transitions. [2023-11-06 22:10:06,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 289.5) internal successors, (2895), 10 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:06,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 766.0) internal successors, (8426), 11 states have internal predecessors, (8426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:06,086 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 766.0) internal successors, (8426), 11 states have internal predecessors, (8426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:06,086 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 166 flow. Second operand 10 states and 2895 transitions. [2023-11-06 22:10:06,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 127 transitions, 663 flow [2023-11-06 22:10:06,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 127 transitions, 650 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-06 22:10:06,094 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 252 flow [2023-11-06 22:10:06,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=252, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2023-11-06 22:10:06,095 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 19 predicate places. [2023-11-06 22:10:06,095 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 252 flow [2023-11-06 22:10:06,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 282.84615384615387) internal successors, (3677), 13 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:06,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:10:06,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:10:06,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:06,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:10:06,304 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 22:10:06,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:06,304 INFO L85 PathProgramCache]: Analyzing trace with hash -849792023, now seen corresponding path program 1 times [2023-11-06 22:10:06,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:06,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060649926] [2023-11-06 22:10:06,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:06,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:07,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:07,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060649926] [2023-11-06 22:10:07,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060649926] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:10:07,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548020414] [2023-11-06 22:10:07,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:07,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:07,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:07,536 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:07,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:10:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:07,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:10:07,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:08,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:10:10,766 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:10:10,767 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 366 treesize of output 563 [2023-11-06 22:10:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:21,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548020414] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:10:21,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:10:21,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-11-06 22:10:21,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929569952] [2023-11-06 22:10:21,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:10:21,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:10:21,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:21,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:10:21,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:10:22,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 766 [2023-11-06 22:10:22,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 252 flow. Second operand has 16 states, 16 states have (on average 266.6875) internal successors, (4267), 16 states have internal predecessors, (4267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:22,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:10:22,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 766 [2023-11-06 22:10:22,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:10:25,215 INFO L124 PetriNetUnfolderBase]: 3306/4792 cut-off events. [2023-11-06 22:10:25,215 INFO L125 PetriNetUnfolderBase]: For 6871/6871 co-relation queries the response was YES. [2023-11-06 22:10:25,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14253 conditions, 4792 events. 3306/4792 cut-off events. For 6871/6871 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21970 event pairs, 528 based on Foata normal form. 6/4790 useless extension candidates. Maximal degree in co-relation 10004. Up to 2283 conditions per place. [2023-11-06 22:10:25,265 INFO L140 encePairwiseOnDemand]: 757/766 looper letters, 106 selfloop transitions, 34 changer transitions 37/177 dead transitions. [2023-11-06 22:10:25,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 177 transitions, 1103 flow [2023-11-06 22:10:25,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:10:25,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 22:10:25,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3560 transitions. [2023-11-06 22:10:25,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575015063265716 [2023-11-06 22:10:25,290 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3560 transitions. [2023-11-06 22:10:25,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3560 transitions. [2023-11-06 22:10:25,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:10:25,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3560 transitions. [2023-11-06 22:10:25,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 273.84615384615387) internal successors, (3560), 13 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:25,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 766.0) internal successors, (10724), 14 states have internal predecessors, (10724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:25,330 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 766.0) internal successors, (10724), 14 states have internal predecessors, (10724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:25,330 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 252 flow. Second operand 13 states and 3560 transitions. [2023-11-06 22:10:25,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 177 transitions, 1103 flow [2023-11-06 22:10:25,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 177 transitions, 1093 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-06 22:10:25,376 INFO L231 Difference]: Finished difference. Result has 71 places, 76 transitions, 598 flow [2023-11-06 22:10:25,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=598, PETRI_PLACES=71, PETRI_TRANSITIONS=76} [2023-11-06 22:10:25,380 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 33 predicate places. [2023-11-06 22:10:25,381 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 76 transitions, 598 flow [2023-11-06 22:10:25,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 266.6875) internal successors, (4267), 16 states have internal predecessors, (4267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:25,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:10:25,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:10:25,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:25,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:25,590 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 22:10:25,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:25,591 INFO L85 PathProgramCache]: Analyzing trace with hash 123171055, now seen corresponding path program 1 times [2023-11-06 22:10:25,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:25,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143363968] [2023-11-06 22:10:25,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:25,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:25,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:10:25,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:25,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143363968] [2023-11-06 22:10:25,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143363968] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:10:25,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:10:25,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:10:25,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943776326] [2023-11-06 22:10:25,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:10:25,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:10:25,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:25,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:10:25,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:10:26,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 766 [2023-11-06 22:10:26,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 76 transitions, 598 flow. Second operand has 5 states, 5 states have (on average 311.8) internal successors, (1559), 5 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:26,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:10:26,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 766 [2023-11-06 22:10:26,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:10:28,288 INFO L124 PetriNetUnfolderBase]: 5656/8364 cut-off events. [2023-11-06 22:10:28,288 INFO L125 PetriNetUnfolderBase]: For 18073/18073 co-relation queries the response was YES. [2023-11-06 22:10:28,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26754 conditions, 8364 events. 5656/8364 cut-off events. For 18073/18073 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 44312 event pairs, 3876 based on Foata normal form. 280/8642 useless extension candidates. Maximal degree in co-relation 22894. Up to 3584 conditions per place. [2023-11-06 22:10:28,348 INFO L140 encePairwiseOnDemand]: 756/766 looper letters, 117 selfloop transitions, 26 changer transitions 0/143 dead transitions. [2023-11-06 22:10:28,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 143 transitions, 1338 flow [2023-11-06 22:10:28,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:10:28,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:10:28,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1917 transitions. [2023-11-06 22:10:28,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4171018276762402 [2023-11-06 22:10:28,357 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1917 transitions. [2023-11-06 22:10:28,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1917 transitions. [2023-11-06 22:10:28,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:10:28,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1917 transitions. [2023-11-06 22:10:28,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 319.5) internal successors, (1917), 6 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:28,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 766.0) internal successors, (5362), 7 states have internal predecessors, (5362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:28,375 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 766.0) internal successors, (5362), 7 states have internal predecessors, (5362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:28,375 INFO L175 Difference]: Start difference. First operand has 71 places, 76 transitions, 598 flow. Second operand 6 states and 1917 transitions. [2023-11-06 22:10:28,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 143 transitions, 1338 flow [2023-11-06 22:10:28,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 143 transitions, 1206 flow, removed 56 selfloop flow, removed 3 redundant places. [2023-11-06 22:10:28,443 INFO L231 Difference]: Finished difference. Result has 75 places, 81 transitions, 620 flow [2023-11-06 22:10:28,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=620, PETRI_PLACES=75, PETRI_TRANSITIONS=81} [2023-11-06 22:10:28,444 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 37 predicate places. [2023-11-06 22:10:28,445 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 81 transitions, 620 flow [2023-11-06 22:10:28,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 311.8) internal successors, (1559), 5 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:28,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:10:28,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:10:28,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:10:28,446 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 22:10:28,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:28,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1297843663, now seen corresponding path program 1 times [2023-11-06 22:10:28,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:28,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163125197] [2023-11-06 22:10:28,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:28,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:28,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:28,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:10:28,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:28,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163125197] [2023-11-06 22:10:28,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163125197] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:10:28,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799809848] [2023-11-06 22:10:28,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:28,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:28,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:28,826 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:28,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:10:29,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:29,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:10:29,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:29,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:10:29,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:10:30,781 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:10:30,782 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 617 treesize of output 716 [2023-11-06 22:10:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:10:32,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799809848] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:10:32,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:10:32,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2023-11-06 22:10:32,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164095480] [2023-11-06 22:10:32,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:10:32,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:10:32,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:32,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:10:32,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:10:33,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 766 [2023-11-06 22:10:33,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 81 transitions, 620 flow. Second operand has 11 states, 11 states have (on average 279.1818181818182) internal successors, (3071), 11 states have internal predecessors, (3071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:33,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:10:33,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 766 [2023-11-06 22:10:33,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:10:37,014 INFO L124 PetriNetUnfolderBase]: 10304/15580 cut-off events. [2023-11-06 22:10:37,014 INFO L125 PetriNetUnfolderBase]: For 27509/27509 co-relation queries the response was YES. [2023-11-06 22:10:37,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45072 conditions, 15580 events. 10304/15580 cut-off events. For 27509/27509 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 93964 event pairs, 4000 based on Foata normal form. 720/16300 useless extension candidates. Maximal degree in co-relation 39440. Up to 3743 conditions per place. [2023-11-06 22:10:37,101 INFO L140 encePairwiseOnDemand]: 753/766 looper letters, 135 selfloop transitions, 43 changer transitions 18/196 dead transitions. [2023-11-06 22:10:37,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 196 transitions, 1562 flow [2023-11-06 22:10:37,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:10:37,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:10:37,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2873 transitions. [2023-11-06 22:10:37,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37506527415143603 [2023-11-06 22:10:37,118 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2873 transitions. [2023-11-06 22:10:37,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2873 transitions. [2023-11-06 22:10:37,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:10:37,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2873 transitions. [2023-11-06 22:10:37,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 287.3) internal successors, (2873), 10 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:37,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 766.0) internal successors, (8426), 11 states have internal predecessors, (8426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:37,142 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 766.0) internal successors, (8426), 11 states have internal predecessors, (8426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:37,142 INFO L175 Difference]: Start difference. First operand has 75 places, 81 transitions, 620 flow. Second operand 10 states and 2873 transitions. [2023-11-06 22:10:37,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 196 transitions, 1562 flow [2023-11-06 22:10:37,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 196 transitions, 1534 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-06 22:10:37,262 INFO L231 Difference]: Finished difference. Result has 86 places, 97 transitions, 908 flow [2023-11-06 22:10:37,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=908, PETRI_PLACES=86, PETRI_TRANSITIONS=97} [2023-11-06 22:10:37,264 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 48 predicate places. [2023-11-06 22:10:37,264 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 97 transitions, 908 flow [2023-11-06 22:10:37,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 279.1818181818182) internal successors, (3071), 11 states have internal predecessors, (3071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:37,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:10:37,265 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:10:37,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:37,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:37,472 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 22:10:37,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:37,472 INFO L85 PathProgramCache]: Analyzing trace with hash -836676027, now seen corresponding path program 1 times [2023-11-06 22:10:37,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:37,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369096564] [2023-11-06 22:10:37,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:37,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:37,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:10:37,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:37,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369096564] [2023-11-06 22:10:37,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369096564] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:10:37,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140461193] [2023-11-06 22:10:37,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:37,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:37,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:37,870 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:37,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:10:38,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:38,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:10:38,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:38,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:10:38,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:10:41,512 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:10:41,513 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 482 treesize of output 671 [2023-11-06 22:10:50,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:10:50,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140461193] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:10:50,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:10:50,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-11-06 22:10:50,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878608299] [2023-11-06 22:10:50,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:10:50,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:10:50,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:50,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:10:50,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:10:51,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 766 [2023-11-06 22:10:51,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 97 transitions, 908 flow. Second operand has 15 states, 15 states have (on average 271.6) internal successors, (4074), 15 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:51,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:10:51,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 766 [2023-11-06 22:10:51,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:10:59,932 INFO L124 PetriNetUnfolderBase]: 17428/26456 cut-off events. [2023-11-06 22:10:59,932 INFO L125 PetriNetUnfolderBase]: For 67250/67250 co-relation queries the response was YES. [2023-11-06 22:11:00,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77928 conditions, 26456 events. 17428/26456 cut-off events. For 67250/67250 co-relation queries the response was YES. Maximal size of possible extension queue 1001. Compared 173552 event pairs, 3490 based on Foata normal form. 1380/27836 useless extension candidates. Maximal degree in co-relation 67626. Up to 5304 conditions per place. [2023-11-06 22:11:00,124 INFO L140 encePairwiseOnDemand]: 758/766 looper letters, 216 selfloop transitions, 69 changer transitions 40/325 dead transitions. [2023-11-06 22:11:00,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 325 transitions, 2628 flow [2023-11-06 22:11:00,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:11:00,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:11:00,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4770 transitions. [2023-11-06 22:11:00,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36630317923514055 [2023-11-06 22:11:00,143 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4770 transitions. [2023-11-06 22:11:00,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4770 transitions. [2023-11-06 22:11:00,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:11:00,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4770 transitions. [2023-11-06 22:11:00,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 280.5882352941176) internal successors, (4770), 17 states have internal predecessors, (4770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:00,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 766.0) internal successors, (13788), 18 states have internal predecessors, (13788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:00,181 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 766.0) internal successors, (13788), 18 states have internal predecessors, (13788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:00,182 INFO L175 Difference]: Start difference. First operand has 86 places, 97 transitions, 908 flow. Second operand 17 states and 4770 transitions. [2023-11-06 22:11:00,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 325 transitions, 2628 flow [2023-11-06 22:11:00,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 325 transitions, 2584 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-11-06 22:11:00,699 INFO L231 Difference]: Finished difference. Result has 104 places, 130 transitions, 1435 flow [2023-11-06 22:11:00,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=834, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1435, PETRI_PLACES=104, PETRI_TRANSITIONS=130} [2023-11-06 22:11:00,700 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 66 predicate places. [2023-11-06 22:11:00,700 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 130 transitions, 1435 flow [2023-11-06 22:11:00,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 271.6) internal successors, (4074), 15 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:00,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:00,702 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:00,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-06 22:11:00,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:00,909 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 22:11:00,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:00,910 INFO L85 PathProgramCache]: Analyzing trace with hash 499315113, now seen corresponding path program 2 times [2023-11-06 22:11:00,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:00,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683276766] [2023-11-06 22:11:00,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:00,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:02,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:11:02,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:02,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683276766] [2023-11-06 22:11:02,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683276766] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:02,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077896583] [2023-11-06 22:11:02,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:11:02,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:02,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:02,124 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:02,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:11:02,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:11:02,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:11:02,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:11:02,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:02,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:11:02,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:06,752 INFO L322 Elim1Store]: treesize reduction 114, result has 68.9 percent of original size [2023-11-06 22:11:06,752 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 763 treesize of output 903 [2023-11-06 22:11:11,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:11:11,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077896583] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:11,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:11,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 16 [2023-11-06 22:11:11,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998888382] [2023-11-06 22:11:11,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:11,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:11:11,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:11,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:11:11,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:11:13,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 766 [2023-11-06 22:11:13,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 130 transitions, 1435 flow. Second operand has 17 states, 17 states have (on average 258.05882352941177) internal successors, (4387), 17 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:13,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:11:13,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 766 [2023-11-06 22:11:13,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:11:20,411 INFO L124 PetriNetUnfolderBase]: 16820/25665 cut-off events. [2023-11-06 22:11:20,411 INFO L125 PetriNetUnfolderBase]: For 74362/74362 co-relation queries the response was YES. [2023-11-06 22:11:20,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81536 conditions, 25665 events. 16820/25665 cut-off events. For 74362/74362 co-relation queries the response was YES. Maximal size of possible extension queue 946. Compared 168860 event pairs, 4020 based on Foata normal form. 400/26065 useless extension candidates. Maximal degree in co-relation 69404. Up to 4884 conditions per place. [2023-11-06 22:11:20,585 INFO L140 encePairwiseOnDemand]: 754/766 looper letters, 190 selfloop transitions, 101 changer transitions 118/409 dead transitions. [2023-11-06 22:11:20,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 409 transitions, 3768 flow [2023-11-06 22:11:20,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:11:20,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 22:11:20,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5610 transitions. [2023-11-06 22:11:20,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34875046624393885 [2023-11-06 22:11:20,601 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5610 transitions. [2023-11-06 22:11:20,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5610 transitions. [2023-11-06 22:11:20,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:11:20,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5610 transitions. [2023-11-06 22:11:20,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 267.14285714285717) internal successors, (5610), 21 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:20,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 766.0) internal successors, (16852), 22 states have internal predecessors, (16852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:20,638 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 766.0) internal successors, (16852), 22 states have internal predecessors, (16852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:20,639 INFO L175 Difference]: Start difference. First operand has 104 places, 130 transitions, 1435 flow. Second operand 21 states and 5610 transitions. [2023-11-06 22:11:20,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 409 transitions, 3768 flow [2023-11-06 22:11:21,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 409 transitions, 3637 flow, removed 57 selfloop flow, removed 2 redundant places. [2023-11-06 22:11:21,367 INFO L231 Difference]: Finished difference. Result has 126 places, 167 transitions, 2115 flow [2023-11-06 22:11:21,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2115, PETRI_PLACES=126, PETRI_TRANSITIONS=167} [2023-11-06 22:11:21,368 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 88 predicate places. [2023-11-06 22:11:21,369 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 167 transitions, 2115 flow [2023-11-06 22:11:21,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 258.05882352941177) internal successors, (4387), 17 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:21,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:21,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:21,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:21,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:21,576 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 22:11:21,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:21,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1760510884, now seen corresponding path program 1 times [2023-11-06 22:11:21,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:21,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032173912] [2023-11-06 22:11:21,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:21,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:21,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:11:21,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:21,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032173912] [2023-11-06 22:11:21,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032173912] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:21,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839532992] [2023-11-06 22:11:21,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:21,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:21,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:21,864 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:21,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:11:22,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:22,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:11:22,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:11:22,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:23,633 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:11:23,634 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 614 treesize of output 713 [2023-11-06 22:11:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:11:25,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839532992] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:25,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:25,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-06 22:11:25,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9490162] [2023-11-06 22:11:25,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:25,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:11:25,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:25,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:11:25,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:11:25,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 766 [2023-11-06 22:11:25,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 167 transitions, 2115 flow. Second operand has 10 states, 10 states have (on average 309.4) internal successors, (3094), 10 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:25,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:11:25,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 766 [2023-11-06 22:11:25,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:11:30,041 INFO L124 PetriNetUnfolderBase]: 11008/17217 cut-off events. [2023-11-06 22:11:30,042 INFO L125 PetriNetUnfolderBase]: For 66650/66650 co-relation queries the response was YES. [2023-11-06 22:11:30,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53357 conditions, 17217 events. 11008/17217 cut-off events. For 66650/66650 co-relation queries the response was YES. Maximal size of possible extension queue 693. Compared 111170 event pairs, 4690 based on Foata normal form. 784/18001 useless extension candidates. Maximal degree in co-relation 50926. Up to 6908 conditions per place. [2023-11-06 22:11:30,168 INFO L140 encePairwiseOnDemand]: 763/766 looper letters, 104 selfloop transitions, 32 changer transitions 24/160 dead transitions. [2023-11-06 22:11:30,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 160 transitions, 1906 flow [2023-11-06 22:11:30,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:11:30,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:11:30,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1588 transitions. [2023-11-06 22:11:30,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.414621409921671 [2023-11-06 22:11:30,174 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1588 transitions. [2023-11-06 22:11:30,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1588 transitions. [2023-11-06 22:11:30,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:11:30,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1588 transitions. [2023-11-06 22:11:30,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 317.6) internal successors, (1588), 5 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:30,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 766.0) internal successors, (4596), 6 states have internal predecessors, (4596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:30,186 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 766.0) internal successors, (4596), 6 states have internal predecessors, (4596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:30,186 INFO L175 Difference]: Start difference. First operand has 126 places, 167 transitions, 2115 flow. Second operand 5 states and 1588 transitions. [2023-11-06 22:11:30,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 160 transitions, 1906 flow [2023-11-06 22:11:30,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 160 transitions, 1728 flow, removed 30 selfloop flow, removed 14 redundant places. [2023-11-06 22:11:30,598 INFO L231 Difference]: Finished difference. Result has 109 places, 111 transitions, 1221 flow [2023-11-06 22:11:30,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1221, PETRI_PLACES=109, PETRI_TRANSITIONS=111} [2023-11-06 22:11:30,599 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 71 predicate places. [2023-11-06 22:11:30,599 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 111 transitions, 1221 flow [2023-11-06 22:11:30,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 309.4) internal successors, (3094), 10 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:30,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:30,600 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:30,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-06 22:11:30,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:11:30,801 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 22:11:30,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:30,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1352716008, now seen corresponding path program 1 times [2023-11-06 22:11:30,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:30,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056067530] [2023-11-06 22:11:30,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:30,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:32,938 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:32,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:32,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056067530] [2023-11-06 22:11:32,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056067530] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:32,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303492642] [2023-11-06 22:11:32,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:32,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:32,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:32,940 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:32,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683fb284-c21f-4657-bdd6-655ac6967fc9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:11:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:33,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:11:33,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:33,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:11:33,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:38,524 INFO L322 Elim1Store]: treesize reduction 236, result has 69.3 percent of original size [2023-11-06 22:11:38,525 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 1224 treesize of output 1523