./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/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_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/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_97eb8d26-183a-44a2-811b-55cec2717456/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 c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:00:57,155 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:00:57,280 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:00:57,297 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:00:57,298 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:00:57,337 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:00:57,338 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:00:57,338 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:00:57,340 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:00:57,347 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:00:57,349 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:00:57,350 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:00:57,350 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:00:57,352 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:00:57,353 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:00:57,353 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:00:57,354 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:00:57,354 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:00:57,355 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:00:57,355 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:00:57,355 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:00:57,356 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:00:57,357 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:00:57,357 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:00:57,358 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:00:57,359 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:00:57,359 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:00:57,360 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:00:57,360 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:00:57,361 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:00:57,362 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:00:57,363 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:00:57,363 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:00:57,363 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:00:57,364 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:00:57,364 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:00:57,364 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:00:57,364 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:00:57,365 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:00:57,365 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_97eb8d26-183a-44a2-811b-55cec2717456/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c [2023-11-06 22:00:57,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:00:57,723 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:00:57,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:00:57,727 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:00:57,728 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:00:57,729 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2023-11-06 22:01:00,712 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:01:01,037 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:01:01,037 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2023-11-06 22:01:01,046 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/data/61336b86d/b020803a6b6f4813a1b72dd29afb6aab/FLAG2ef3a8e37 [2023-11-06 22:01:01,061 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/data/61336b86d/b020803a6b6f4813a1b72dd29afb6aab [2023-11-06 22:01:01,064 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:01:01,065 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:01:01,067 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:01:01,067 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:01:01,073 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:01:01,073 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:01:01" (1/1) ... [2023-11-06 22:01:01,075 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bb766c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:01, skipping insertion in model container [2023-11-06 22:01:01,075 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:01:01" (1/1) ... [2023-11-06 22:01:01,100 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:01:01,346 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_97eb8d26-183a-44a2-811b-55cec2717456/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2023-11-06 22:01:01,370 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:01:01,384 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:01:01,432 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_97eb8d26-183a-44a2-811b-55cec2717456/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2023-11-06 22:01:01,438 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:01:01,449 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:01:01,455 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:01:01,463 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:01:01,463 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:01 WrapperNode [2023-11-06 22:01:01,463 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:01:01,465 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:01:01,466 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:01:01,466 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:01:01,473 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:01" (1/1) ... [2023-11-06 22:01:01,493 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:01" (1/1) ... [2023-11-06 22:01:01,534 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 155 [2023-11-06 22:01:01,535 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:01:01,536 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:01:01,536 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:01:01,536 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:01:01,546 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:01" (1/1) ... [2023-11-06 22:01:01,547 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:01" (1/1) ... [2023-11-06 22:01:01,562 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:01" (1/1) ... [2023-11-06 22:01:01,566 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:01" (1/1) ... [2023-11-06 22:01:01,574 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:01" (1/1) ... [2023-11-06 22:01:01,592 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:01" (1/1) ... [2023-11-06 22:01:01,593 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:01" (1/1) ... [2023-11-06 22:01:01,595 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:01" (1/1) ... [2023-11-06 22:01:01,598 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:01:01,601 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:01:01,601 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:01:01,601 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:01:01,603 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:01" (1/1) ... [2023-11-06 22:01:01,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:01:01,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:01,633 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:01:01,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:01:01,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:01:01,669 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:01:01,669 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:01:01,669 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:01:01,670 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:01:01,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:01:01,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:01:01,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:01:01,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:01:01,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:01:01,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:01:01,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:01:01,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:01:01,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:01:01,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:01:01,674 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 22:01:01,784 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:01:01,785 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:01:02,120 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:01:02,221 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:01:02,222 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:01:02,225 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:01:02 BoogieIcfgContainer [2023-11-06 22:01:02,225 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:01:02,228 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:01:02,228 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:01:02,236 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:01:02,237 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:01:01" (1/3) ... [2023-11-06 22:01:02,238 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df24146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:01:02, skipping insertion in model container [2023-11-06 22:01:02,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:01" (2/3) ... [2023-11-06 22:01:02,239 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df24146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:01:02, skipping insertion in model container [2023-11-06 22:01:02,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:01:02" (3/3) ... [2023-11-06 22:01:02,243 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2023-11-06 22:01:02,251 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:01:02,260 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:01:02,260 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:01:02,260 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:01:02,388 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:01:02,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 143 transitions, 300 flow [2023-11-06 22:01:02,572 INFO L124 PetriNetUnfolderBase]: 11/141 cut-off events. [2023-11-06 22:01:02,572 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:01:02,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 141 events. 11/141 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 132 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 99. Up to 2 conditions per place. [2023-11-06 22:01:02,578 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 143 transitions, 300 flow [2023-11-06 22:01:02,590 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 132 transitions, 276 flow [2023-11-06 22:01:02,603 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:01:02,623 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 132 transitions, 276 flow [2023-11-06 22:01:02,633 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 132 transitions, 276 flow [2023-11-06 22:01:02,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 132 transitions, 276 flow [2023-11-06 22:01:02,702 INFO L124 PetriNetUnfolderBase]: 11/132 cut-off events. [2023-11-06 22:01:02,704 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:01:02,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 132 events. 11/132 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 128 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 99. Up to 2 conditions per place. [2023-11-06 22:01:02,711 INFO L119 LiptonReduction]: Number of co-enabled transitions 1348 [2023-11-06 22:01:07,984 INFO L134 LiptonReduction]: Checked pairs total: 1489 [2023-11-06 22:01:07,984 INFO L136 LiptonReduction]: Total number of compositions: 137 [2023-11-06 22:01:08,000 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:01:08,007 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;@4ce963b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:01:08,008 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 22:01:08,014 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:01:08,014 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2023-11-06 22:01:08,014 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:01:08,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:01:08,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:08,016 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:01:08,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:08,021 INFO L85 PathProgramCache]: Analyzing trace with hash 888171116, now seen corresponding path program 1 times [2023-11-06 22:01:08,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:08,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120977102] [2023-11-06 22:01:08,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:08,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:08,414 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 22:01:08,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:08,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120977102] [2023-11-06 22:01:08,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120977102] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:01:08,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:01:08,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:01:08,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624384678] [2023-11-06 22:01:08,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:08,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:01:08,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:08,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:01:08,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:01:08,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 280 [2023-11-06 22:01:08,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:08,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:01:08,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 280 [2023-11-06 22:01:08,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:01:08,579 INFO L124 PetriNetUnfolderBase]: 87/153 cut-off events. [2023-11-06 22:01:08,579 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-06 22:01:08,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 153 events. 87/153 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 496 event pairs, 21 based on Foata normal form. 1/109 useless extension candidates. Maximal degree in co-relation 244. Up to 87 conditions per place. [2023-11-06 22:01:08,583 INFO L140 encePairwiseOnDemand]: 277/280 looper letters, 21 selfloop transitions, 2 changer transitions 4/29 dead transitions. [2023-11-06 22:01:08,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 133 flow [2023-11-06 22:01:08,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:01:08,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:01:08,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 400 transitions. [2023-11-06 22:01:08,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2023-11-06 22:01:08,611 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 400 transitions. [2023-11-06 22:01:08,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 400 transitions. [2023-11-06 22:01:08,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:01:08,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 400 transitions. [2023-11-06 22:01:08,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:08,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:08,634 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:08,635 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 48 flow. Second operand 3 states and 400 transitions. [2023-11-06 22:01:08,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 29 transitions, 133 flow [2023-11-06 22:01:08,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 29 transitions, 119 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:01:08,642 INFO L231 Difference]: Finished difference. Result has 21 places, 19 transitions, 52 flow [2023-11-06 22:01:08,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=21, PETRI_TRANSITIONS=19} [2023-11-06 22:01:08,648 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2023-11-06 22:01:08,648 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 19 transitions, 52 flow [2023-11-06 22:01:08,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:08,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:01:08,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:08,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:01:08,650 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:01:08,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:08,651 INFO L85 PathProgramCache]: Analyzing trace with hash -39235095, now seen corresponding path program 1 times [2023-11-06 22:01:08,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:08,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424883385] [2023-11-06 22:01:08,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:08,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:08,920 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 22:01:08,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:08,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424883385] [2023-11-06 22:01:08,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424883385] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:01:08,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:01:08,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:01:08,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818435270] [2023-11-06 22:01:08,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:08,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:01:08,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:08,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:01:08,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:01:08,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 280 [2023-11-06 22:01:08,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:08,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:01:08,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 280 [2023-11-06 22:01:08,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:01:09,108 INFO L124 PetriNetUnfolderBase]: 96/184 cut-off events. [2023-11-06 22:01:09,109 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-06 22:01:09,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 184 events. 96/184 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 637 event pairs, 58 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 194. Up to 150 conditions per place. [2023-11-06 22:01:09,114 INFO L140 encePairwiseOnDemand]: 275/280 looper letters, 16 selfloop transitions, 2 changer transitions 10/30 dead transitions. [2023-11-06 22:01:09,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 30 transitions, 134 flow [2023-11-06 22:01:09,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:01:09,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:01:09,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 501 transitions. [2023-11-06 22:01:09,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4473214285714286 [2023-11-06 22:01:09,117 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 501 transitions. [2023-11-06 22:01:09,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 501 transitions. [2023-11-06 22:01:09,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:01:09,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 501 transitions. [2023-11-06 22:01:09,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.25) internal successors, (501), 4 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:09,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:09,129 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:09,130 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 52 flow. Second operand 4 states and 501 transitions. [2023-11-06 22:01:09,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 30 transitions, 134 flow [2023-11-06 22:01:09,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 30 transitions, 132 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:01:09,133 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 66 flow [2023-11-06 22:01:09,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=66, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2023-11-06 22:01:09,135 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2023-11-06 22:01:09,169 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 66 flow [2023-11-06 22:01:09,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:09,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:01:09,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:09,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:01:09,171 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:01:09,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:09,174 INFO L85 PathProgramCache]: Analyzing trace with hash 930981699, now seen corresponding path program 1 times [2023-11-06 22:01:09,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:09,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028292114] [2023-11-06 22:01:09,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:09,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:09,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:01:09,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:09,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028292114] [2023-11-06 22:01:09,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028292114] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:01:09,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:01:09,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:01:09,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41654175] [2023-11-06 22:01:09,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:09,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:01:09,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:09,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:01:09,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:01:09,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 280 [2023-11-06 22:01:09,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:09,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:01:09,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 280 [2023-11-06 22:01:09,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:01:09,560 INFO L124 PetriNetUnfolderBase]: 74/140 cut-off events. [2023-11-06 22:01:09,560 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-06 22:01:09,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 140 events. 74/140 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 382 event pairs, 11 based on Foata normal form. 6/145 useless extension candidates. Maximal degree in co-relation 324. Up to 98 conditions per place. [2023-11-06 22:01:09,562 INFO L140 encePairwiseOnDemand]: 276/280 looper letters, 22 selfloop transitions, 4 changer transitions 6/33 dead transitions. [2023-11-06 22:01:09,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 33 transitions, 163 flow [2023-11-06 22:01:09,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:01:09,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:01:09,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 503 transitions. [2023-11-06 22:01:09,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44910714285714287 [2023-11-06 22:01:09,565 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 503 transitions. [2023-11-06 22:01:09,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 503 transitions. [2023-11-06 22:01:09,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:01:09,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 503 transitions. [2023-11-06 22:01:09,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:09,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:09,572 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:09,572 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 66 flow. Second operand 4 states and 503 transitions. [2023-11-06 22:01:09,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 33 transitions, 163 flow [2023-11-06 22:01:09,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 33 transitions, 159 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:01:09,575 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 91 flow [2023-11-06 22:01:09,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=91, PETRI_PLACES=28, PETRI_TRANSITIONS=23} [2023-11-06 22:01:09,576 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 6 predicate places. [2023-11-06 22:01:09,576 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 91 flow [2023-11-06 22:01:09,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:09,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:01:09,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:09,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:01:09,578 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:01:09,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:09,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1776457621, now seen corresponding path program 1 times [2023-11-06 22:01:09,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:09,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354442684] [2023-11-06 22:01:09,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:09,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:01:09,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:09,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354442684] [2023-11-06 22:01:09,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354442684] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:09,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170644820] [2023-11-06 22:01:09,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:09,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:09,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:09,843 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:09,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:01:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:09,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:01:10,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:10,175 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 50 [2023-11-06 22:01:10,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:01:10,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:10,299 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2023-11-06 22:01:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:01:10,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170644820] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:10,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:01:10,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 9 [2023-11-06 22:01:10,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857143784] [2023-11-06 22:01:10,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:10,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:01:10,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:10,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:01:10,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:01:10,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 280 [2023-11-06 22:01:10,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 91 flow. Second operand has 10 states, 10 states have (on average 120.4) internal successors, (1204), 10 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:10,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:01:10,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 280 [2023-11-06 22:01:10,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:01:10,652 INFO L124 PetriNetUnfolderBase]: 88/171 cut-off events. [2023-11-06 22:01:10,652 INFO L125 PetriNetUnfolderBase]: For 95/97 co-relation queries the response was YES. [2023-11-06 22:01:10,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 475 conditions, 171 events. 88/171 cut-off events. For 95/97 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 537 event pairs, 1 based on Foata normal form. 14/184 useless extension candidates. Maximal degree in co-relation 454. Up to 43 conditions per place. [2023-11-06 22:01:10,654 INFO L140 encePairwiseOnDemand]: 274/280 looper letters, 26 selfloop transitions, 8 changer transitions 25/60 dead transitions. [2023-11-06 22:01:10,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 60 transitions, 318 flow [2023-11-06 22:01:10,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:01:10,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:01:10,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1230 transitions. [2023-11-06 22:01:10,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2023-11-06 22:01:10,660 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1230 transitions. [2023-11-06 22:01:10,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1230 transitions. [2023-11-06 22:01:10,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:01:10,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1230 transitions. [2023-11-06 22:01:10,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 123.0) internal successors, (1230), 10 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:10,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 280.0) internal successors, (3080), 11 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:10,675 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 280.0) internal successors, (3080), 11 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:10,676 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 91 flow. Second operand 10 states and 1230 transitions. [2023-11-06 22:01:10,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 60 transitions, 318 flow [2023-11-06 22:01:10,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 60 transitions, 314 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-06 22:01:10,679 INFO L231 Difference]: Finished difference. Result has 38 places, 22 transitions, 100 flow [2023-11-06 22:01:10,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=100, PETRI_PLACES=38, PETRI_TRANSITIONS=22} [2023-11-06 22:01:10,681 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 16 predicate places. [2023-11-06 22:01:10,681 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 22 transitions, 100 flow [2023-11-06 22:01:10,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 120.4) internal successors, (1204), 10 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:10,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:01:10,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:10,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:10,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:10,889 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:01:10,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:10,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1192588063, now seen corresponding path program 2 times [2023-11-06 22:01:10,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:10,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138983577] [2023-11-06 22:01:10,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:10,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:10,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:11,714 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 22:01:11,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:11,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138983577] [2023-11-06 22:01:11,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138983577] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:11,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819305051] [2023-11-06 22:01:11,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:01:11,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:11,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:11,717 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:11,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:01:11,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:01:11,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:01:11,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 22:01:11,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:12,267 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 22:01:12,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:12,668 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:01:12,669 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 104 treesize of output 80 [2023-11-06 22:01:13,201 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 22:01:13,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819305051] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:13,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:01:13,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-06 22:01:13,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247791578] [2023-11-06 22:01:13,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:13,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:01:13,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:13,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:01:13,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:01:14,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 280 [2023-11-06 22:01:14,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 22 transitions, 100 flow. Second operand has 25 states, 25 states have (on average 94.96) internal successors, (2374), 25 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:14,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:01:14,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 280 [2023-11-06 22:01:14,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:01:16,187 INFO L124 PetriNetUnfolderBase]: 250/450 cut-off events. [2023-11-06 22:01:16,187 INFO L125 PetriNetUnfolderBase]: For 512/512 co-relation queries the response was YES. [2023-11-06 22:01:16,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1485 conditions, 450 events. 250/450 cut-off events. For 512/512 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1631 event pairs, 2 based on Foata normal form. 10/457 useless extension candidates. Maximal degree in co-relation 912. Up to 131 conditions per place. [2023-11-06 22:01:16,192 INFO L140 encePairwiseOnDemand]: 270/280 looper letters, 81 selfloop transitions, 44 changer transitions 26/151 dead transitions. [2023-11-06 22:01:16,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 151 transitions, 935 flow [2023-11-06 22:01:16,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 22:01:16,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 22:01:16,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3040 transitions. [2023-11-06 22:01:16,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35023041474654376 [2023-11-06 22:01:16,205 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3040 transitions. [2023-11-06 22:01:16,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3040 transitions. [2023-11-06 22:01:16,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:01:16,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3040 transitions. [2023-11-06 22:01:16,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 98.06451612903226) internal successors, (3040), 31 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:16,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 280.0) internal successors, (8960), 32 states have internal predecessors, (8960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:16,237 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 280.0) internal successors, (8960), 32 states have internal predecessors, (8960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:16,237 INFO L175 Difference]: Start difference. First operand has 38 places, 22 transitions, 100 flow. Second operand 31 states and 3040 transitions. [2023-11-06 22:01:16,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 151 transitions, 935 flow [2023-11-06 22:01:16,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 151 transitions, 821 flow, removed 39 selfloop flow, removed 6 redundant places. [2023-11-06 22:01:16,245 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 446 flow [2023-11-06 22:01:16,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=446, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2023-11-06 22:01:16,246 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 42 predicate places. [2023-11-06 22:01:16,246 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 446 flow [2023-11-06 22:01:16,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 94.96) internal successors, (2374), 25 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:16,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:01:16,248 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:16,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:16,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:16,454 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:01:16,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:16,455 INFO L85 PathProgramCache]: Analyzing trace with hash 330140351, now seen corresponding path program 3 times [2023-11-06 22:01:16,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:16,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104785219] [2023-11-06 22:01:16,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:16,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:16,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:01:16,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:16,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104785219] [2023-11-06 22:01:16,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104785219] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:16,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619648299] [2023-11-06 22:01:16,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:01:16,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:16,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:16,719 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:16,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:01:16,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:01:16,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:01:16,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:01:16,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:16,932 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:01:16,933 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 27 treesize of output 9 [2023-11-06 22:01:16,973 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 22:01:16,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:17,182 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 22:01:17,183 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 125 treesize of output 93 [2023-11-06 22:01:17,250 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 22:01:17,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619648299] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:17,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:01:17,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 7] total 15 [2023-11-06 22:01:17,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607049775] [2023-11-06 22:01:17,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:17,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:01:17,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:17,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:01:17,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:01:17,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 280 [2023-11-06 22:01:17,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 446 flow. Second operand has 16 states, 16 states have (on average 111.0625) internal successors, (1777), 16 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:17,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:01:17,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 280 [2023-11-06 22:01:17,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:01:18,544 INFO L124 PetriNetUnfolderBase]: 662/1156 cut-off events. [2023-11-06 22:01:18,545 INFO L125 PetriNetUnfolderBase]: For 2340/2340 co-relation queries the response was YES. [2023-11-06 22:01:18,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4455 conditions, 1156 events. 662/1156 cut-off events. For 2340/2340 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5342 event pairs, 16 based on Foata normal form. 24/1177 useless extension candidates. Maximal degree in co-relation 4381. Up to 373 conditions per place. [2023-11-06 22:01:18,558 INFO L140 encePairwiseOnDemand]: 273/280 looper letters, 151 selfloop transitions, 127 changer transitions 1/279 dead transitions. [2023-11-06 22:01:18,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 279 transitions, 2267 flow [2023-11-06 22:01:18,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 22:01:18,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-06 22:01:18,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3633 transitions. [2023-11-06 22:01:18,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40546875 [2023-11-06 22:01:18,576 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3633 transitions. [2023-11-06 22:01:18,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3633 transitions. [2023-11-06 22:01:18,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:01:18,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3633 transitions. [2023-11-06 22:01:18,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 113.53125) internal successors, (3633), 32 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:18,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 280.0) internal successors, (9240), 33 states have internal predecessors, (9240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:18,614 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 280.0) internal successors, (9240), 33 states have internal predecessors, (9240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:18,614 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 446 flow. Second operand 32 states and 3633 transitions. [2023-11-06 22:01:18,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 279 transitions, 2267 flow [2023-11-06 22:01:18,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 279 transitions, 1871 flow, removed 193 selfloop flow, removed 6 redundant places. [2023-11-06 22:01:18,640 INFO L231 Difference]: Finished difference. Result has 96 places, 177 transitions, 1452 flow [2023-11-06 22:01:18,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1452, PETRI_PLACES=96, PETRI_TRANSITIONS=177} [2023-11-06 22:01:18,643 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 74 predicate places. [2023-11-06 22:01:18,643 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 177 transitions, 1452 flow [2023-11-06 22:01:18,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 111.0625) internal successors, (1777), 16 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:18,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:01:18,645 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:18,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:18,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:18,851 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:01:18,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:18,852 INFO L85 PathProgramCache]: Analyzing trace with hash 306760694, now seen corresponding path program 4 times [2023-11-06 22:01:18,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:18,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259110924] [2023-11-06 22:01:18,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:18,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:19,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:19,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259110924] [2023-11-06 22:01:19,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259110924] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:19,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649272194] [2023-11-06 22:01:19,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:01:19,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:19,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:19,058 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:19,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:01:19,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:01:19,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:01:19,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:01:19,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:19,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:19,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:19,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649272194] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:19,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:01:19,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-06 22:01:19,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389453253] [2023-11-06 22:01:19,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:19,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:01:19,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:19,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:01:19,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:01:19,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 280 [2023-11-06 22:01:19,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 177 transitions, 1452 flow. Second operand has 12 states, 12 states have (on average 115.75) internal successors, (1389), 12 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:19,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:01:19,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 280 [2023-11-06 22:01:19,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:01:19,761 INFO L124 PetriNetUnfolderBase]: 522/932 cut-off events. [2023-11-06 22:01:19,762 INFO L125 PetriNetUnfolderBase]: For 3399/3404 co-relation queries the response was YES. [2023-11-06 22:01:19,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3929 conditions, 932 events. 522/932 cut-off events. For 3399/3404 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4180 event pairs, 260 based on Foata normal form. 24/944 useless extension candidates. Maximal degree in co-relation 3483. Up to 851 conditions per place. [2023-11-06 22:01:19,773 INFO L140 encePairwiseOnDemand]: 276/280 looper letters, 127 selfloop transitions, 3 changer transitions 21/155 dead transitions. [2023-11-06 22:01:19,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 155 transitions, 1520 flow [2023-11-06 22:01:19,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:01:19,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:01:19,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 709 transitions. [2023-11-06 22:01:19,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4220238095238095 [2023-11-06 22:01:19,777 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 709 transitions. [2023-11-06 22:01:19,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 709 transitions. [2023-11-06 22:01:19,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:01:19,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 709 transitions. [2023-11-06 22:01:19,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.16666666666667) internal successors, (709), 6 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:19,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 280.0) internal successors, (1960), 7 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:19,784 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 280.0) internal successors, (1960), 7 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:19,785 INFO L175 Difference]: Start difference. First operand has 96 places, 177 transitions, 1452 flow. Second operand 6 states and 709 transitions. [2023-11-06 22:01:19,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 155 transitions, 1520 flow [2023-11-06 22:01:19,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 155 transitions, 1250 flow, removed 126 selfloop flow, removed 4 redundant places. [2023-11-06 22:01:19,823 INFO L231 Difference]: Finished difference. Result has 93 places, 134 transitions, 853 flow [2023-11-06 22:01:19,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=853, PETRI_PLACES=93, PETRI_TRANSITIONS=134} [2023-11-06 22:01:19,824 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 71 predicate places. [2023-11-06 22:01:19,824 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 134 transitions, 853 flow [2023-11-06 22:01:19,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 115.75) internal successors, (1389), 12 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:19,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:01:19,825 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:19,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-06 22:01:20,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:20,031 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:01:20,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:20,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1338129450, now seen corresponding path program 5 times [2023-11-06 22:01:20,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:20,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678016513] [2023-11-06 22:01:20,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:20,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:20,298 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 22:01:20,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:20,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678016513] [2023-11-06 22:01:20,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678016513] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:20,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557971835] [2023-11-06 22:01:20,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:01:20,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:20,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:20,304 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:20,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:01:20,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:01:20,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:01:20,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:01:20,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:20,458 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 50 [2023-11-06 22:01:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:01:20,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:20,598 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 60 [2023-11-06 22:01:20,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:01:20,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557971835] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:20,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:01:20,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2023-11-06 22:01:20,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120317288] [2023-11-06 22:01:20,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:20,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:01:20,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:20,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:01:20,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:01:20,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 280 [2023-11-06 22:01:20,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 134 transitions, 853 flow. Second operand has 8 states, 8 states have (on average 120.75) internal successors, (966), 8 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:20,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:01:20,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 280 [2023-11-06 22:01:20,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:01:20,961 INFO L124 PetriNetUnfolderBase]: 535/953 cut-off events. [2023-11-06 22:01:20,961 INFO L125 PetriNetUnfolderBase]: For 1597/1597 co-relation queries the response was YES. [2023-11-06 22:01:20,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3397 conditions, 953 events. 535/953 cut-off events. For 1597/1597 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4293 event pairs, 81 based on Foata normal form. 24/974 useless extension candidates. Maximal degree in co-relation 3366. Up to 595 conditions per place. [2023-11-06 22:01:20,973 INFO L140 encePairwiseOnDemand]: 275/280 looper letters, 139 selfloop transitions, 26 changer transitions 5/171 dead transitions. [2023-11-06 22:01:20,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 171 transitions, 1341 flow [2023-11-06 22:01:20,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:01:20,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:01:20,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1113 transitions. [2023-11-06 22:01:20,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2023-11-06 22:01:20,979 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1113 transitions. [2023-11-06 22:01:20,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1113 transitions. [2023-11-06 22:01:20,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:01:20,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1113 transitions. [2023-11-06 22:01:20,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 123.66666666666667) internal successors, (1113), 9 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:20,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 280.0) internal successors, (2800), 10 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:20,990 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 280.0) internal successors, (2800), 10 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:20,990 INFO L175 Difference]: Start difference. First operand has 93 places, 134 transitions, 853 flow. Second operand 9 states and 1113 transitions. [2023-11-06 22:01:20,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 171 transitions, 1341 flow [2023-11-06 22:01:21,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 171 transitions, 1246 flow, removed 26 selfloop flow, removed 14 redundant places. [2023-11-06 22:01:21,013 INFO L231 Difference]: Finished difference. Result has 80 places, 136 transitions, 909 flow [2023-11-06 22:01:21,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=909, PETRI_PLACES=80, PETRI_TRANSITIONS=136} [2023-11-06 22:01:21,014 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 58 predicate places. [2023-11-06 22:01:21,014 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 136 transitions, 909 flow [2023-11-06 22:01:21,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 120.75) internal successors, (966), 8 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:21,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:01:21,015 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:21,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:21,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 22:01:21,222 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:01:21,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:21,222 INFO L85 PathProgramCache]: Analyzing trace with hash -492539582, now seen corresponding path program 6 times [2023-11-06 22:01:21,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:21,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587938252] [2023-11-06 22:01:21,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:21,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:21,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:22,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:22,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587938252] [2023-11-06 22:01:22,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587938252] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:22,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286902398] [2023-11-06 22:01:22,726 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:01:22,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:22,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:22,727 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:22,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:01:22,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:01:22,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:01:22,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-06 22:01:22,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:23,512 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:01:23,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:23,515 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:01:23,520 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:01:23,520 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 21 [2023-11-06 22:01:23,590 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:23,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:24,401 INFO L322 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-11-06 22:01:24,401 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 174 treesize of output 136 [2023-11-06 22:01:25,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:25,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286902398] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:25,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:01:25,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 34 [2023-11-06 22:01:25,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226540782] [2023-11-06 22:01:25,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:25,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-06 22:01:25,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:25,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-06 22:01:25,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1043, Unknown=0, NotChecked=0, Total=1260 [2023-11-06 22:01:27,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 280 [2023-11-06 22:01:27,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 136 transitions, 909 flow. Second operand has 36 states, 36 states have (on average 94.72222222222223) internal successors, (3410), 36 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:27,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:01:27,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 280 [2023-11-06 22:01:27,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:01:30,538 INFO L124 PetriNetUnfolderBase]: 972/1734 cut-off events. [2023-11-06 22:01:30,539 INFO L125 PetriNetUnfolderBase]: For 1867/1867 co-relation queries the response was YES. [2023-11-06 22:01:30,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6089 conditions, 1734 events. 972/1734 cut-off events. For 1867/1867 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9044 event pairs, 42 based on Foata normal form. 25/1757 useless extension candidates. Maximal degree in co-relation 5711. Up to 438 conditions per place. [2023-11-06 22:01:30,555 INFO L140 encePairwiseOnDemand]: 271/280 looper letters, 166 selfloop transitions, 120 changer transitions 54/340 dead transitions. [2023-11-06 22:01:30,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 340 transitions, 2734 flow [2023-11-06 22:01:30,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-06 22:01:30,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-06 22:01:30,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3213 transitions. [2023-11-06 22:01:30,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3477272727272727 [2023-11-06 22:01:30,570 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3213 transitions. [2023-11-06 22:01:30,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3213 transitions. [2023-11-06 22:01:30,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:01:30,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3213 transitions. [2023-11-06 22:01:30,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 97.36363636363636) internal successors, (3213), 33 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:30,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 280.0) internal successors, (9520), 34 states have internal predecessors, (9520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:30,619 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 280.0) internal successors, (9520), 34 states have internal predecessors, (9520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:30,619 INFO L175 Difference]: Start difference. First operand has 80 places, 136 transitions, 909 flow. Second operand 33 states and 3213 transitions. [2023-11-06 22:01:30,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 340 transitions, 2734 flow [2023-11-06 22:01:30,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 340 transitions, 2711 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-11-06 22:01:30,645 INFO L231 Difference]: Finished difference. Result has 130 places, 202 transitions, 1803 flow [2023-11-06 22:01:30,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=899, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1803, PETRI_PLACES=130, PETRI_TRANSITIONS=202} [2023-11-06 22:01:30,647 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 108 predicate places. [2023-11-06 22:01:30,648 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 202 transitions, 1803 flow [2023-11-06 22:01:30,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 94.72222222222223) internal successors, (3410), 36 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:30,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:01:30,649 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:30,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-06 22:01:30,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:30,855 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:01:30,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:30,855 INFO L85 PathProgramCache]: Analyzing trace with hash 944707202, now seen corresponding path program 7 times [2023-11-06 22:01:30,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:30,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024043150] [2023-11-06 22:01:30,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:30,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:32,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:32,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:32,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024043150] [2023-11-06 22:01:32,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024043150] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:32,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28766586] [2023-11-06 22:01:32,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:01:32,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:32,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:32,659 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:32,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:01:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:32,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-06 22:01:32,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:33,464 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:33,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:34,044 INFO L322 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-11-06 22:01:34,045 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 174 treesize of output 136 [2023-11-06 22:01:34,891 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:34,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28766586] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:34,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:01:34,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 34 [2023-11-06 22:01:34,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781579328] [2023-11-06 22:01:34,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:34,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-06 22:01:34,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:34,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-06 22:01:34,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1059, Unknown=0, NotChecked=0, Total=1260 [2023-11-06 22:01:37,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 280 [2023-11-06 22:01:37,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 202 transitions, 1803 flow. Second operand has 36 states, 36 states have (on average 88.72222222222223) internal successors, (3194), 36 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:37,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:01:37,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 280 [2023-11-06 22:01:37,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:01:39,704 INFO L124 PetriNetUnfolderBase]: 1138/2014 cut-off events. [2023-11-06 22:01:39,705 INFO L125 PetriNetUnfolderBase]: For 3999/3999 co-relation queries the response was YES. [2023-11-06 22:01:39,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8278 conditions, 2014 events. 1138/2014 cut-off events. For 3999/3999 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10608 event pairs, 58 based on Foata normal form. 35/2047 useless extension candidates. Maximal degree in co-relation 8190. Up to 449 conditions per place. [2023-11-06 22:01:39,727 INFO L140 encePairwiseOnDemand]: 270/280 looper letters, 167 selfloop transitions, 113 changer transitions 77/357 dead transitions. [2023-11-06 22:01:39,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 357 transitions, 3469 flow [2023-11-06 22:01:39,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:01:39,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-06 22:01:39,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2378 transitions. [2023-11-06 22:01:39,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32664835164835165 [2023-11-06 22:01:39,737 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2378 transitions. [2023-11-06 22:01:39,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2378 transitions. [2023-11-06 22:01:39,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:01:39,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2378 transitions. [2023-11-06 22:01:39,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 91.46153846153847) internal successors, (2378), 26 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:39,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 280.0) internal successors, (7560), 27 states have internal predecessors, (7560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:39,760 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 280.0) internal successors, (7560), 27 states have internal predecessors, (7560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:39,760 INFO L175 Difference]: Start difference. First operand has 130 places, 202 transitions, 1803 flow. Second operand 26 states and 2378 transitions. [2023-11-06 22:01:39,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 357 transitions, 3469 flow [2023-11-06 22:01:39,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 357 transitions, 3334 flow, removed 55 selfloop flow, removed 14 redundant places. [2023-11-06 22:01:39,822 INFO L231 Difference]: Finished difference. Result has 135 places, 204 transitions, 2072 flow [2023-11-06 22:01:39,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=1450, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2072, PETRI_PLACES=135, PETRI_TRANSITIONS=204} [2023-11-06 22:01:39,824 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 113 predicate places. [2023-11-06 22:01:39,827 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 204 transitions, 2072 flow [2023-11-06 22:01:39,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 88.72222222222223) internal successors, (3194), 36 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:39,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:01:39,829 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:39,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:40,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:01:40,034 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:01:40,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:40,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1857112523, now seen corresponding path program 8 times [2023-11-06 22:01:40,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:40,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606706038] [2023-11-06 22:01:40,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:40,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:40,370 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:01:40,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:40,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606706038] [2023-11-06 22:01:40,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606706038] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:40,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6598031] [2023-11-06 22:01:40,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:01:40,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:40,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:40,372 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:40,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:01:40,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:01:40,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:01:40,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:01:40,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:40,547 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:01:40,548 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 26 treesize of output 9 [2023-11-06 22:01:40,589 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:01:40,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:40,784 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 22:01:40,785 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 127 treesize of output 95 [2023-11-06 22:01:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:01:40,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6598031] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:40,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:01:40,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 16 [2023-11-06 22:01:40,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140747211] [2023-11-06 22:01:40,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:40,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:01:40,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:40,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:01:40,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:01:41,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 280 [2023-11-06 22:01:41,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 204 transitions, 2072 flow. Second operand has 17 states, 17 states have (on average 110.82352941176471) internal successors, (1884), 17 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:41,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:01:41,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 280 [2023-11-06 22:01:41,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:01:42,041 INFO L124 PetriNetUnfolderBase]: 1660/2900 cut-off events. [2023-11-06 22:01:42,041 INFO L125 PetriNetUnfolderBase]: For 8772/8772 co-relation queries the response was YES. [2023-11-06 22:01:42,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12735 conditions, 2900 events. 1660/2900 cut-off events. For 8772/8772 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 16375 event pairs, 64 based on Foata normal form. 56/2955 useless extension candidates. Maximal degree in co-relation 12674. Up to 740 conditions per place. [2023-11-06 22:01:42,080 INFO L140 encePairwiseOnDemand]: 273/280 looper letters, 181 selfloop transitions, 217 changer transitions 6/404 dead transitions. [2023-11-06 22:01:42,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 404 transitions, 4574 flow [2023-11-06 22:01:42,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:01:42,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:01:42,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2153 transitions. [2023-11-06 22:01:42,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046992481203007 [2023-11-06 22:01:42,094 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2153 transitions. [2023-11-06 22:01:42,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2153 transitions. [2023-11-06 22:01:42,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:01:42,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2153 transitions. [2023-11-06 22:01:42,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 113.3157894736842) internal successors, (2153), 19 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:42,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 280.0) internal successors, (5600), 20 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:42,116 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 280.0) internal successors, (5600), 20 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:42,117 INFO L175 Difference]: Start difference. First operand has 135 places, 204 transitions, 2072 flow. Second operand 19 states and 2153 transitions. [2023-11-06 22:01:42,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 404 transitions, 4574 flow [2023-11-06 22:01:42,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 404 transitions, 4239 flow, removed 50 selfloop flow, removed 19 redundant places. [2023-11-06 22:01:42,220 INFO L231 Difference]: Finished difference. Result has 125 places, 315 transitions, 3906 flow [2023-11-06 22:01:42,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=1887, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3906, PETRI_PLACES=125, PETRI_TRANSITIONS=315} [2023-11-06 22:01:42,222 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 103 predicate places. [2023-11-06 22:01:42,222 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 315 transitions, 3906 flow [2023-11-06 22:01:42,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 110.82352941176471) internal successors, (1884), 17 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:42,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:01:42,223 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:42,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:42,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:01:42,436 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:01:42,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:42,436 INFO L85 PathProgramCache]: Analyzing trace with hash 28142103, now seen corresponding path program 9 times [2023-11-06 22:01:42,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:42,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852620462] [2023-11-06 22:01:42,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:42,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:44,790 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:44,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:44,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852620462] [2023-11-06 22:01:44,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852620462] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:44,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967331527] [2023-11-06 22:01:44,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:01:44,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:44,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:44,793 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:44,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97eb8d26-183a-44a2-811b-55cec2717456/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:01:45,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 22:01:45,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:01:45,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-06 22:01:45,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:46,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:48,775 INFO L322 Elim1Store]: treesize reduction 28, result has 90.6 percent of original size [2023-11-06 22:01:48,776 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 357 treesize of output 475