./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --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 8c7125507f231f46c946ebcd57e8b56859ee58b969eed99ccdbcf88141d9e219 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:36:34,409 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:36:34,485 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:36:34,491 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:36:34,492 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:36:34,518 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:36:34,519 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:36:34,519 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:36:34,520 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:36:34,521 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:36:34,522 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:36:34,522 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:36:34,523 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:36:34,524 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:36:34,524 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:36:34,525 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:36:34,526 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:36:34,526 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:36:34,527 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:36:34,528 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:36:34,528 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:36:34,529 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:36:34,530 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:36:34,530 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:36:34,531 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:36:34,531 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:36:34,532 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:36:34,532 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:36:34,533 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:36:34,533 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:36:34,534 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:36:34,534 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:36:34,535 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:36:34,535 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:36:34,536 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:36:34,536 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:36:34,537 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:36:34,537 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:36:34,537 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:36:34,538 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_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c7125507f231f46c946ebcd57e8b56859ee58b969eed99ccdbcf88141d9e219 [2023-11-19 07:36:34,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:36:34,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:36:34,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:36:34,879 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:36:34,880 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:36:34,881 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/unroll-2.wvr.c [2023-11-19 07:36:38,144 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:36:38,403 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:36:38,404 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/sv-benchmarks/c/weaver/unroll-2.wvr.c [2023-11-19 07:36:38,415 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/data/d6a2421e1/1b3b456510ae40eda782ce01c3801e18/FLAG3974459ea [2023-11-19 07:36:38,434 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/data/d6a2421e1/1b3b456510ae40eda782ce01c3801e18 [2023-11-19 07:36:38,437 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:36:38,438 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:36:38,439 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:36:38,440 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:36:38,444 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:36:38,445 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:36:38" (1/1) ... [2023-11-19 07:36:38,447 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e758237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:38, skipping insertion in model container [2023-11-19 07:36:38,447 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:36:38" (1/1) ... [2023-11-19 07:36:38,473 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:36:38,658 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_b491f550-e17b-4a1e-8428-825062caaa5c/sv-benchmarks/c/weaver/unroll-2.wvr.c[2454,2467] [2023-11-19 07:36:38,669 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:36:38,680 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:36:38,703 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_b491f550-e17b-4a1e-8428-825062caaa5c/sv-benchmarks/c/weaver/unroll-2.wvr.c[2454,2467] [2023-11-19 07:36:38,707 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:36:38,723 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:36:38,723 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:38 WrapperNode [2023-11-19 07:36:38,723 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:36:38,725 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:36:38,725 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:36:38,725 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:36:38,734 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:38" (1/1) ... [2023-11-19 07:36:38,743 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:38" (1/1) ... [2023-11-19 07:36:38,771 INFO L138 Inliner]: procedures = 24, calls = 32, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 139 [2023-11-19 07:36:38,771 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:36:38,772 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:36:38,772 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:36:38,772 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:36:38,783 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:38" (1/1) ... [2023-11-19 07:36:38,783 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:38" (1/1) ... [2023-11-19 07:36:38,787 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:38" (1/1) ... [2023-11-19 07:36:38,787 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:38" (1/1) ... [2023-11-19 07:36:38,796 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:38" (1/1) ... [2023-11-19 07:36:38,800 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:38" (1/1) ... [2023-11-19 07:36:38,803 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:38" (1/1) ... [2023-11-19 07:36:38,805 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:38" (1/1) ... [2023-11-19 07:36:38,808 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:36:38,809 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:36:38,810 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:36:38,810 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:36:38,811 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:38" (1/1) ... [2023-11-19 07:36:38,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:36:38,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:38,862 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:36:38,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:36:38,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:36:38,897 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:36:38,897 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:36:38,897 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:36:38,897 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:36:38,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:36:38,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:36:38,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:36:38,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:36:38,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:36:38,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:36:38,898 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:36:38,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:36:38,900 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:36:39,008 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:36:39,010 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:36:39,325 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:36:39,337 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:36:39,337 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 07:36:39,342 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:36:39 BoogieIcfgContainer [2023-11-19 07:36:39,342 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:36:39,346 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:36:39,346 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:36:39,350 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:36:39,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:36:38" (1/3) ... [2023-11-19 07:36:39,351 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aa6f04b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:36:39, skipping insertion in model container [2023-11-19 07:36:39,351 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:38" (2/3) ... [2023-11-19 07:36:39,352 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aa6f04b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:36:39, skipping insertion in model container [2023-11-19 07:36:39,352 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:36:39" (3/3) ... [2023-11-19 07:36:39,353 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2023-11-19 07:36:39,363 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:36:39,376 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:36:39,376 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:36:39,376 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:36:39,515 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:36:39,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 173 transitions, 360 flow [2023-11-19 07:36:39,676 INFO L124 PetriNetUnfolderBase]: 14/171 cut-off events. [2023-11-19 07:36:39,676 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:36:39,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 171 events. 14/171 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 158 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 111. Up to 2 conditions per place. [2023-11-19 07:36:39,683 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 173 transitions, 360 flow [2023-11-19 07:36:39,689 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 162 transitions, 336 flow [2023-11-19 07:36:39,693 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:36:39,703 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 162 transitions, 336 flow [2023-11-19 07:36:39,707 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 162 transitions, 336 flow [2023-11-19 07:36:39,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 162 transitions, 336 flow [2023-11-19 07:36:39,751 INFO L124 PetriNetUnfolderBase]: 14/162 cut-off events. [2023-11-19 07:36:39,751 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:36:39,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 162 events. 14/162 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 152 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 111. Up to 2 conditions per place. [2023-11-19 07:36:39,756 INFO L119 LiptonReduction]: Number of co-enabled transitions 2268 [2023-11-19 07:36:45,694 INFO L134 LiptonReduction]: Checked pairs total: 2156 [2023-11-19 07:36:45,695 INFO L136 LiptonReduction]: Total number of compositions: 194 [2023-11-19 07:36:45,711 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:36:45,719 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=LoopHeads, 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;@7c731048, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:36:45,719 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:36:45,725 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:36:45,725 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-19 07:36:45,725 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:36:45,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:45,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:45,727 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:36:45,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:45,733 INFO L85 PathProgramCache]: Analyzing trace with hash 179609904, now seen corresponding path program 1 times [2023-11-19 07:36:45,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:45,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730240614] [2023-11-19 07:36:45,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:45,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:46,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:46,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:46,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730240614] [2023-11-19 07:36:46,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730240614] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:46,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:46,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:36:46,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776896674] [2023-11-19 07:36:46,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:46,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:46,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:46,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:46,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:46,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 367 [2023-11-19 07:36:46,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:46,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:46,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 367 [2023-11-19 07:36:46,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:46,240 INFO L124 PetriNetUnfolderBase]: 75/136 cut-off events. [2023-11-19 07:36:46,241 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-19 07:36:46,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 136 events. 75/136 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 355 event pairs, 24 based on Foata normal form. 1/104 useless extension candidates. Maximal degree in co-relation 220. Up to 79 conditions per place. [2023-11-19 07:36:46,244 INFO L140 encePairwiseOnDemand]: 363/367 looper letters, 25 selfloop transitions, 3 changer transitions 1/29 dead transitions. [2023-11-19 07:36:46,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 29 transitions, 137 flow [2023-11-19 07:36:46,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:46,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:36:46,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 486 transitions. [2023-11-19 07:36:46,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44141689373297005 [2023-11-19 07:36:46,264 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 486 transitions. [2023-11-19 07:36:46,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 486 transitions. [2023-11-19 07:36:46,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:46,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 486 transitions. [2023-11-19 07:36:46,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.0) internal successors, (486), 3 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) [2023-11-19 07:36:46,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:46,284 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:46,286 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 486 transitions. [2023-11-19 07:36:46,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 29 transitions, 137 flow [2023-11-19 07:36:46,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 29 transitions, 123 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:36:46,291 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2023-11-19 07:36:46,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2023-11-19 07:36:46,297 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-19 07:36:46,297 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2023-11-19 07:36:46,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:46,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:46,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:46,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:36:46,299 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:36:46,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:46,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1212858338, now seen corresponding path program 1 times [2023-11-19 07:36:46,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:46,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949901085] [2023-11-19 07:36:46,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:46,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:46,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:36:46,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:46,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949901085] [2023-11-19 07:36:46,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949901085] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:46,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:46,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:36:46,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077192202] [2023-11-19 07:36:46,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:46,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:46,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:46,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:46,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:46,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 367 [2023-11-19 07:36:46,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:46,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:46,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 367 [2023-11-19 07:36:46,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:46,608 INFO L124 PetriNetUnfolderBase]: 75/137 cut-off events. [2023-11-19 07:36:46,608 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-19 07:36:46,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 137 events. 75/137 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 335 event pairs, 48 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 120. Up to 137 conditions per place. [2023-11-19 07:36:46,611 INFO L140 encePairwiseOnDemand]: 364/367 looper letters, 18 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2023-11-19 07:36:46,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 20 transitions, 99 flow [2023-11-19 07:36:46,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:46,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:36:46,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 466 transitions. [2023-11-19 07:36:46,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232515894641235 [2023-11-19 07:36:46,615 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 466 transitions. [2023-11-19 07:36:46,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 466 transitions. [2023-11-19 07:36:46,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:46,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 466 transitions. [2023-11-19 07:36:46,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:46,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:46,623 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:46,623 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 3 states and 466 transitions. [2023-11-19 07:36:46,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 20 transitions, 99 flow [2023-11-19 07:36:46,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 20 transitions, 96 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:36:46,625 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 66 flow [2023-11-19 07:36:46,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2023-11-19 07:36:46,626 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-11-19 07:36:46,626 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 66 flow [2023-11-19 07:36:46,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:46,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:46,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:46,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:36:46,628 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:36:46,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:46,629 INFO L85 PathProgramCache]: Analyzing trace with hash 444049041, now seen corresponding path program 1 times [2023-11-19 07:36:46,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:46,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776531076] [2023-11-19 07:36:46,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:46,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:46,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:46,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:36:46,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:46,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776531076] [2023-11-19 07:36:46,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776531076] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:46,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979152234] [2023-11-19 07:36:46,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:46,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:46,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:46,908 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:46,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:36:47,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:47,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:36:47,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:47,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:36:47,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:47,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:36:47,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979152234] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:47,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:36:47,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-11-19 07:36:47,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116677432] [2023-11-19 07:36:47,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:47,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:36:47,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:47,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:36:47,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:36:47,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 367 [2023-11-19 07:36:47,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:47,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:47,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 367 [2023-11-19 07:36:47,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:47,344 INFO L124 PetriNetUnfolderBase]: 83/151 cut-off events. [2023-11-19 07:36:47,344 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 07:36:47,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 151 events. 83/151 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 412 event pairs, 24 based on Foata normal form. 6/156 useless extension candidates. Maximal degree in co-relation 347. Up to 78 conditions per place. [2023-11-19 07:36:47,348 INFO L140 encePairwiseOnDemand]: 363/367 looper letters, 31 selfloop transitions, 4 changer transitions 1/36 dead transitions. [2023-11-19 07:36:47,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 36 transitions, 178 flow [2023-11-19 07:36:47,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:36:47,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:36:47,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 632 transitions. [2023-11-19 07:36:47,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305177111716621 [2023-11-19 07:36:47,354 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 632 transitions. [2023-11-19 07:36:47,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 632 transitions. [2023-11-19 07:36:47,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:47,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 632 transitions. [2023-11-19 07:36:47,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:47,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 367.0) internal successors, (1835), 5 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:47,363 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 367.0) internal successors, (1835), 5 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:47,363 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 66 flow. Second operand 4 states and 632 transitions. [2023-11-19 07:36:47,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 36 transitions, 178 flow [2023-11-19 07:36:47,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 36 transitions, 174 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:36:47,367 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 88 flow [2023-11-19 07:36:47,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-11-19 07:36:47,369 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-11-19 07:36:47,370 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 88 flow [2023-11-19 07:36:47,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:47,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:47,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:47,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:47,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:47,593 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:36:47,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:47,593 INFO L85 PathProgramCache]: Analyzing trace with hash 2080645205, now seen corresponding path program 2 times [2023-11-19 07:36:47,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:47,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682709757] [2023-11-19 07:36:47,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:47,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:47,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:36:47,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:47,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682709757] [2023-11-19 07:36:47,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682709757] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:47,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:47,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:36:47,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698738782] [2023-11-19 07:36:47,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:47,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:36:47,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:47,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:36:47,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:36:47,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 367 [2023-11-19 07:36:47,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 149.2) internal successors, (746), 5 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:47,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:47,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 367 [2023-11-19 07:36:47,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:47,980 INFO L124 PetriNetUnfolderBase]: 101/196 cut-off events. [2023-11-19 07:36:47,980 INFO L125 PetriNetUnfolderBase]: For 181/181 co-relation queries the response was YES. [2023-11-19 07:36:47,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 196 events. 101/196 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 668 event pairs, 26 based on Foata normal form. 14/209 useless extension candidates. Maximal degree in co-relation 524. Up to 103 conditions per place. [2023-11-19 07:36:47,983 INFO L140 encePairwiseOnDemand]: 361/367 looper letters, 33 selfloop transitions, 7 changer transitions 11/51 dead transitions. [2023-11-19 07:36:47,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 51 transitions, 289 flow [2023-11-19 07:36:47,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:36:47,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:36:47,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 924 transitions. [2023-11-19 07:36:47,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4196185286103542 [2023-11-19 07:36:47,988 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 924 transitions. [2023-11-19 07:36:47,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 924 transitions. [2023-11-19 07:36:47,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:47,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 924 transitions. [2023-11-19 07:36:47,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:47,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 367.0) internal successors, (2569), 7 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:48,000 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 367.0) internal successors, (2569), 7 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:48,001 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 88 flow. Second operand 6 states and 924 transitions. [2023-11-19 07:36:48,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 51 transitions, 289 flow [2023-11-19 07:36:48,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 51 transitions, 282 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:36:48,004 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 150 flow [2023-11-19 07:36:48,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=150, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2023-11-19 07:36:48,005 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2023-11-19 07:36:48,006 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 150 flow [2023-11-19 07:36:48,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 149.2) internal successors, (746), 5 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:48,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:48,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:48,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:36:48,008 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:36:48,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:48,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1487164091, now seen corresponding path program 3 times [2023-11-19 07:36:48,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:48,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942187664] [2023-11-19 07:36:48,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:48,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:48,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:48,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:36:48,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:48,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942187664] [2023-11-19 07:36:48,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942187664] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:48,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466318213] [2023-11-19 07:36:48,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:36:48,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:48,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:48,193 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:48,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:36:48,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:36:48,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:36:48,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:36:48,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:48,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:36:48,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:36:48,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466318213] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:48,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:36:48,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-19 07:36:48,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489689589] [2023-11-19 07:36:48,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:48,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:36:48,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:48,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:36:48,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:36:48,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 367 [2023-11-19 07:36:48,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 150 flow. Second operand has 8 states, 8 states have (on average 148.625) internal successors, (1189), 8 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:48,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:48,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 367 [2023-11-19 07:36:48,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:48,708 INFO L124 PetriNetUnfolderBase]: 108/212 cut-off events. [2023-11-19 07:36:48,708 INFO L125 PetriNetUnfolderBase]: For 306/306 co-relation queries the response was YES. [2023-11-19 07:36:48,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768 conditions, 212 events. 108/212 cut-off events. For 306/306 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 688 event pairs, 36 based on Foata normal form. 6/217 useless extension candidates. Maximal degree in co-relation 745. Up to 135 conditions per place. [2023-11-19 07:36:48,713 INFO L140 encePairwiseOnDemand]: 362/367 looper letters, 34 selfloop transitions, 13 changer transitions 4/51 dead transitions. [2023-11-19 07:36:48,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 51 transitions, 365 flow [2023-11-19 07:36:48,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:36:48,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:36:48,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 772 transitions. [2023-11-19 07:36:48,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.420708446866485 [2023-11-19 07:36:48,718 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 772 transitions. [2023-11-19 07:36:48,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 772 transitions. [2023-11-19 07:36:48,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:48,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 772 transitions. [2023-11-19 07:36:48,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 154.4) internal successors, (772), 5 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:48,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 367.0) internal successors, (2202), 6 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:48,728 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 367.0) internal successors, (2202), 6 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:48,728 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 150 flow. Second operand 5 states and 772 transitions. [2023-11-19 07:36:48,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 51 transitions, 365 flow [2023-11-19 07:36:48,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 51 transitions, 345 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-19 07:36:48,736 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 229 flow [2023-11-19 07:36:48,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-11-19 07:36:48,739 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 17 predicate places. [2023-11-19 07:36:48,743 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 229 flow [2023-11-19 07:36:48,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 148.625) internal successors, (1189), 8 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:48,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:48,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:48,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:48,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:48,966 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:36:48,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:48,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1458948726, now seen corresponding path program 1 times [2023-11-19 07:36:48,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:48,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022884632] [2023-11-19 07:36:48,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:48,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:49,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:36:49,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:49,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022884632] [2023-11-19 07:36:49,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022884632] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:49,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703100940] [2023-11-19 07:36:49,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:49,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:49,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:49,249 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:49,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:36:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:49,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:36:49,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:49,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:36:49,385 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:36:49,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703100940] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:49,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:36:49,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2023-11-19 07:36:49,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060135182] [2023-11-19 07:36:49,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:49,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:36:49,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:49,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:36:49,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:36:49,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 367 [2023-11-19 07:36:49,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 229 flow. Second operand has 5 states, 5 states have (on average 150.2) internal successors, (751), 5 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:49,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:49,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 367 [2023-11-19 07:36:49,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:49,592 INFO L124 PetriNetUnfolderBase]: 114/222 cut-off events. [2023-11-19 07:36:49,592 INFO L125 PetriNetUnfolderBase]: For 523/523 co-relation queries the response was YES. [2023-11-19 07:36:49,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 914 conditions, 222 events. 114/222 cut-off events. For 523/523 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 739 event pairs, 24 based on Foata normal form. 4/225 useless extension candidates. Maximal degree in co-relation 889. Up to 110 conditions per place. [2023-11-19 07:36:49,595 INFO L140 encePairwiseOnDemand]: 362/367 looper letters, 36 selfloop transitions, 14 changer transitions 7/57 dead transitions. [2023-11-19 07:36:49,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 57 transitions, 443 flow [2023-11-19 07:36:49,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:36:49,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:36:49,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 930 transitions. [2023-11-19 07:36:49,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4223433242506812 [2023-11-19 07:36:49,601 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 930 transitions. [2023-11-19 07:36:49,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 930 transitions. [2023-11-19 07:36:49,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:49,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 930 transitions. [2023-11-19 07:36:49,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 155.0) internal successors, (930), 6 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:49,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 367.0) internal successors, (2569), 7 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:49,611 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 367.0) internal successors, (2569), 7 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:49,611 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 229 flow. Second operand 6 states and 930 transitions. [2023-11-19 07:36:49,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 57 transitions, 443 flow [2023-11-19 07:36:49,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 57 transitions, 430 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-19 07:36:49,616 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 272 flow [2023-11-19 07:36:49,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=272, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2023-11-19 07:36:49,617 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2023-11-19 07:36:49,618 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 272 flow [2023-11-19 07:36:49,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 150.2) internal successors, (751), 5 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:49,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:49,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:49,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:49,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:36:49,837 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:36:49,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:49,837 INFO L85 PathProgramCache]: Analyzing trace with hash 731607492, now seen corresponding path program 2 times [2023-11-19 07:36:49,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:49,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104903292] [2023-11-19 07:36:49,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:49,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:49,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:36:49,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:49,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104903292] [2023-11-19 07:36:49,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104903292] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:49,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028435578] [2023-11-19 07:36:49,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:36:49,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:49,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:50,000 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:50,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:36:50,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:36:50,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:36:50,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:36:50,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:36:50,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:36:50,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028435578] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:50,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:36:50,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-19 07:36:50,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435059034] [2023-11-19 07:36:50,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:50,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:36:50,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:50,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:36:50,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:36:50,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 367 [2023-11-19 07:36:50,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 272 flow. Second operand has 8 states, 8 states have (on average 148.875) internal successors, (1191), 8 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:50,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:50,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 367 [2023-11-19 07:36:50,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:50,486 INFO L124 PetriNetUnfolderBase]: 132/248 cut-off events. [2023-11-19 07:36:50,486 INFO L125 PetriNetUnfolderBase]: For 870/870 co-relation queries the response was YES. [2023-11-19 07:36:50,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1108 conditions, 248 events. 132/248 cut-off events. For 870/870 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 845 event pairs, 30 based on Foata normal form. 18/265 useless extension candidates. Maximal degree in co-relation 1081. Up to 141 conditions per place. [2023-11-19 07:36:50,489 INFO L140 encePairwiseOnDemand]: 362/367 looper letters, 39 selfloop transitions, 15 changer transitions 4/58 dead transitions. [2023-11-19 07:36:50,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 58 transitions, 527 flow [2023-11-19 07:36:50,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:36:50,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:36:50,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 920 transitions. [2023-11-19 07:36:50,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4178019981834696 [2023-11-19 07:36:50,494 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 920 transitions. [2023-11-19 07:36:50,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 920 transitions. [2023-11-19 07:36:50,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:50,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 920 transitions. [2023-11-19 07:36:50,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 153.33333333333334) internal successors, (920), 6 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:50,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 367.0) internal successors, (2569), 7 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:50,503 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 367.0) internal successors, (2569), 7 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:50,504 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 272 flow. Second operand 6 states and 920 transitions. [2023-11-19 07:36:50,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 58 transitions, 527 flow [2023-11-19 07:36:50,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 58 transitions, 479 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-11-19 07:36:50,509 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 318 flow [2023-11-19 07:36:50,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=318, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2023-11-19 07:36:50,510 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 26 predicate places. [2023-11-19 07:36:50,511 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 318 flow [2023-11-19 07:36:50,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 148.875) internal successors, (1191), 8 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:50,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:50,512 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:50,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-19 07:36:50,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:36:50,733 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:36:50,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:50,734 INFO L85 PathProgramCache]: Analyzing trace with hash 307259526, now seen corresponding path program 4 times [2023-11-19 07:36:50,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:50,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365080409] [2023-11-19 07:36:50,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:50,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:50,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:36:50,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:50,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365080409] [2023-11-19 07:36:50,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365080409] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:50,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:50,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:36:50,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822340717] [2023-11-19 07:36:50,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:50,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:36:50,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:50,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:36:50,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:36:50,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 367 [2023-11-19 07:36:50,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 318 flow. Second operand has 5 states, 5 states have (on average 150.4) internal successors, (752), 5 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:50,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:50,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 367 [2023-11-19 07:36:50,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:51,013 INFO L124 PetriNetUnfolderBase]: 117/210 cut-off events. [2023-11-19 07:36:51,013 INFO L125 PetriNetUnfolderBase]: For 813/813 co-relation queries the response was YES. [2023-11-19 07:36:51,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1015 conditions, 210 events. 117/210 cut-off events. For 813/813 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 613 event pairs, 40 based on Foata normal form. 4/213 useless extension candidates. Maximal degree in co-relation 987. Up to 151 conditions per place. [2023-11-19 07:36:51,016 INFO L140 encePairwiseOnDemand]: 362/367 looper letters, 35 selfloop transitions, 9 changer transitions 4/48 dead transitions. [2023-11-19 07:36:51,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 48 transitions, 472 flow [2023-11-19 07:36:51,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:36:51,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:36:51,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 765 transitions. [2023-11-19 07:36:51,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41689373297002724 [2023-11-19 07:36:51,020 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 765 transitions. [2023-11-19 07:36:51,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 765 transitions. [2023-11-19 07:36:51,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:51,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 765 transitions. [2023-11-19 07:36:51,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 153.0) internal successors, (765), 5 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:51,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 367.0) internal successors, (2202), 6 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:51,028 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 367.0) internal successors, (2202), 6 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:51,029 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 318 flow. Second operand 5 states and 765 transitions. [2023-11-19 07:36:51,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 48 transitions, 472 flow [2023-11-19 07:36:51,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 48 transitions, 431 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-11-19 07:36:51,034 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 319 flow [2023-11-19 07:36:51,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=319, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2023-11-19 07:36:51,035 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2023-11-19 07:36:51,036 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 319 flow [2023-11-19 07:36:51,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 150.4) internal successors, (752), 5 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:51,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:51,037 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:51,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:36:51,037 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:36:51,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:51,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1140692982, now seen corresponding path program 1 times [2023-11-19 07:36:51,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:51,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712380164] [2023-11-19 07:36:51,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:51,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:51,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:51,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:51,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712380164] [2023-11-19 07:36:51,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712380164] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:51,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994198133] [2023-11-19 07:36:51,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:51,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:51,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:51,625 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:51,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:36:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:51,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 07:36:51,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:51,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:51,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:52,150 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-19 07:36:52,151 INFO L378 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 82 [2023-11-19 07:36:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:52,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994198133] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:52,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:36:52,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-11-19 07:36:52,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433570880] [2023-11-19 07:36:52,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:52,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:36:52,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:52,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:36:52,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:36:53,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 367 [2023-11-19 07:36:53,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 319 flow. Second operand has 18 states, 18 states have (on average 138.5) internal successors, (2493), 18 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:53,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:53,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 367 [2023-11-19 07:36:53,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:54,002 INFO L124 PetriNetUnfolderBase]: 362/642 cut-off events. [2023-11-19 07:36:54,002 INFO L125 PetriNetUnfolderBase]: For 2550/2550 co-relation queries the response was YES. [2023-11-19 07:36:54,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3149 conditions, 642 events. 362/642 cut-off events. For 2550/2550 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2631 event pairs, 71 based on Foata normal form. 2/642 useless extension candidates. Maximal degree in co-relation 3099. Up to 276 conditions per place. [2023-11-19 07:36:54,009 INFO L140 encePairwiseOnDemand]: 360/367 looper letters, 58 selfloop transitions, 28 changer transitions 53/139 dead transitions. [2023-11-19 07:36:54,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 139 transitions, 1330 flow [2023-11-19 07:36:54,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:36:54,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-19 07:36:54,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1589 transitions. [2023-11-19 07:36:54,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3936091156799604 [2023-11-19 07:36:54,017 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1589 transitions. [2023-11-19 07:36:54,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1589 transitions. [2023-11-19 07:36:54,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:54,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1589 transitions. [2023-11-19 07:36:54,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 144.45454545454547) internal successors, (1589), 11 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:54,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 367.0) internal successors, (4404), 12 states have internal predecessors, (4404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:54,033 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 367.0) internal successors, (4404), 12 states have internal predecessors, (4404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:54,033 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 319 flow. Second operand 11 states and 1589 transitions. [2023-11-19 07:36:54,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 139 transitions, 1330 flow [2023-11-19 07:36:54,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 139 transitions, 1244 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-11-19 07:36:54,047 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 574 flow [2023-11-19 07:36:54,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=574, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2023-11-19 07:36:54,049 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 39 predicate places. [2023-11-19 07:36:54,049 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 574 flow [2023-11-19 07:36:54,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 138.5) internal successors, (2493), 18 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:54,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:54,050 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:54,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:54,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:54,265 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:36:54,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:54,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1342144640, now seen corresponding path program 2 times [2023-11-19 07:36:54,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:54,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579592867] [2023-11-19 07:36:54,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:54,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:55,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:55,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:55,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579592867] [2023-11-19 07:36:55,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579592867] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:55,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478548004] [2023-11-19 07:36:55,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:36:55,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:55,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:55,029 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:55,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:36:55,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:36:55,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:36:55,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-19 07:36:55,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:55,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:36:55,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 07:36:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:55,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:55,855 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:36:55,856 INFO L378 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 131 treesize of output 151 [2023-11-19 07:36:55,904 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:36:55,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 64 [2023-11-19 07:36:56,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:56,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478548004] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:56,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:36:56,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-11-19 07:36:56,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109946781] [2023-11-19 07:36:56,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:56,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 07:36:56,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:56,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 07:36:56,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=353, Unknown=1, NotChecked=0, Total=462 [2023-11-19 07:36:57,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 367 [2023-11-19 07:36:57,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 574 flow. Second operand has 22 states, 22 states have (on average 115.22727272727273) internal successors, (2535), 22 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:57,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:57,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 367 [2023-11-19 07:36:57,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:58,248 INFO L124 PetriNetUnfolderBase]: 261/469 cut-off events. [2023-11-19 07:36:58,248 INFO L125 PetriNetUnfolderBase]: For 2216/2216 co-relation queries the response was YES. [2023-11-19 07:36:58,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2489 conditions, 469 events. 261/469 cut-off events. For 2216/2216 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1754 event pairs, 38 based on Foata normal form. 1/469 useless extension candidates. Maximal degree in co-relation 2454. Up to 199 conditions per place. [2023-11-19 07:36:58,254 INFO L140 encePairwiseOnDemand]: 360/367 looper letters, 56 selfloop transitions, 25 changer transitions 26/107 dead transitions. [2023-11-19 07:36:58,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 107 transitions, 1088 flow [2023-11-19 07:36:58,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:36:58,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-19 07:36:58,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1322 transitions. [2023-11-19 07:36:58,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32747089422838743 [2023-11-19 07:36:58,262 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1322 transitions. [2023-11-19 07:36:58,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1322 transitions. [2023-11-19 07:36:58,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:58,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1322 transitions. [2023-11-19 07:36:58,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 120.18181818181819) internal successors, (1322), 11 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:58,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 367.0) internal successors, (4404), 12 states have internal predecessors, (4404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:58,277 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 367.0) internal successors, (4404), 12 states have internal predecessors, (4404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:58,277 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 574 flow. Second operand 11 states and 1322 transitions. [2023-11-19 07:36:58,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 107 transitions, 1088 flow [2023-11-19 07:36:58,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 107 transitions, 1012 flow, removed 32 selfloop flow, removed 4 redundant places. [2023-11-19 07:36:58,297 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 546 flow [2023-11-19 07:36:58,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=546, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2023-11-19 07:36:58,299 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 46 predicate places. [2023-11-19 07:36:58,300 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 546 flow [2023-11-19 07:36:58,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 115.22727272727273) internal successors, (2535), 22 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:58,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:58,302 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:58,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:58,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:36:58,523 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:36:58,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:58,524 INFO L85 PathProgramCache]: Analyzing trace with hash -914697940, now seen corresponding path program 3 times [2023-11-19 07:36:58,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:58,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821345307] [2023-11-19 07:36:58,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:58,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:59,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:59,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821345307] [2023-11-19 07:36:59,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821345307] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:59,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210722279] [2023-11-19 07:36:59,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:36:59,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:59,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:59,951 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:59,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:37:00,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 07:37:00,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:37:00,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 07:37:00,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:00,289 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:37:00,290 INFO L378 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-11-19 07:37:00,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:37:00,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:00,429 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-19 07:37:00,430 INFO L378 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-11-19 07:37:00,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:37:00,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210722279] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:00,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:00,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 3] total 15 [2023-11-19 07:37:00,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393206952] [2023-11-19 07:37:00,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:00,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:37:00,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:00,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:37:00,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:37:01,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 367 [2023-11-19 07:37:01,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 546 flow. Second operand has 17 states, 17 states have (on average 134.58823529411765) internal successors, (2288), 17 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:01,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:01,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 367 [2023-11-19 07:37:01,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:02,449 INFO L124 PetriNetUnfolderBase]: 296/531 cut-off events. [2023-11-19 07:37:02,449 INFO L125 PetriNetUnfolderBase]: For 2396/2396 co-relation queries the response was YES. [2023-11-19 07:37:02,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2826 conditions, 531 events. 296/531 cut-off events. For 2396/2396 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2029 event pairs, 59 based on Foata normal form. 1/530 useless extension candidates. Maximal degree in co-relation 2782. Up to 360 conditions per place. [2023-11-19 07:37:02,456 INFO L140 encePairwiseOnDemand]: 360/367 looper letters, 80 selfloop transitions, 38 changer transitions 1/119 dead transitions. [2023-11-19 07:37:02,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 119 transitions, 1257 flow [2023-11-19 07:37:02,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:37:02,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-19 07:37:02,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2063 transitions. [2023-11-19 07:37:02,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37475022706630334 [2023-11-19 07:37:02,465 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2063 transitions. [2023-11-19 07:37:02,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2063 transitions. [2023-11-19 07:37:02,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:02,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2063 transitions. [2023-11-19 07:37:02,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 137.53333333333333) internal successors, (2063), 15 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:02,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 367.0) internal successors, (5872), 16 states have internal predecessors, (5872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:02,501 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 367.0) internal successors, (5872), 16 states have internal predecessors, (5872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:02,501 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 546 flow. Second operand 15 states and 2063 transitions. [2023-11-19 07:37:02,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 119 transitions, 1257 flow [2023-11-19 07:37:02,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 119 transitions, 1163 flow, removed 11 selfloop flow, removed 10 redundant places. [2023-11-19 07:37:02,520 INFO L231 Difference]: Finished difference. Result has 68 places, 79 transitions, 820 flow [2023-11-19 07:37:02,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=820, PETRI_PLACES=68, PETRI_TRANSITIONS=79} [2023-11-19 07:37:02,520 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 47 predicate places. [2023-11-19 07:37:02,521 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 79 transitions, 820 flow [2023-11-19 07:37:02,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 134.58823529411765) internal successors, (2288), 17 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:02,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:02,522 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:02,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:02,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 07:37:02,733 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:37:02,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:02,733 INFO L85 PathProgramCache]: Analyzing trace with hash 417718798, now seen corresponding path program 4 times [2023-11-19 07:37:02,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:02,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387356426] [2023-11-19 07:37:02,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:02,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:03,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:03,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:03,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387356426] [2023-11-19 07:37:03,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387356426] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:03,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896744369] [2023-11-19 07:37:03,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:37:03,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:03,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:03,857 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:03,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:37:03,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:37:03,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:37:03,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:37:03,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:04,085 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:37:04,086 INFO L378 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2023-11-19 07:37:04,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:37:04,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:04,201 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-19 07:37:04,201 INFO L378 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-11-19 07:37:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:37:04,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896744369] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:04,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:04,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 3] total 13 [2023-11-19 07:37:04,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537546767] [2023-11-19 07:37:04,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:04,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:37:04,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:04,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:37:04,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:37:05,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 367 [2023-11-19 07:37:05,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 79 transitions, 820 flow. Second operand has 15 states, 15 states have (on average 135.0) internal successors, (2025), 15 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:05,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:05,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 367 [2023-11-19 07:37:05,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:05,832 INFO L124 PetriNetUnfolderBase]: 392/700 cut-off events. [2023-11-19 07:37:05,832 INFO L125 PetriNetUnfolderBase]: For 3078/3078 co-relation queries the response was YES. [2023-11-19 07:37:05,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3730 conditions, 700 events. 392/700 cut-off events. For 3078/3078 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2909 event pairs, 93 based on Foata normal form. 1/700 useless extension candidates. Maximal degree in co-relation 3159. Up to 505 conditions per place. [2023-11-19 07:37:05,842 INFO L140 encePairwiseOnDemand]: 361/367 looper letters, 101 selfloop transitions, 35 changer transitions 1/137 dead transitions. [2023-11-19 07:37:05,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 137 transitions, 1535 flow [2023-11-19 07:37:05,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:37:05,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 07:37:05,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1929 transitions. [2023-11-19 07:37:05,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754379135850526 [2023-11-19 07:37:05,850 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1929 transitions. [2023-11-19 07:37:05,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1929 transitions. [2023-11-19 07:37:05,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:05,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1929 transitions. [2023-11-19 07:37:05,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 137.78571428571428) internal successors, (1929), 14 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:05,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 367.0) internal successors, (5505), 15 states have internal predecessors, (5505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:05,868 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 367.0) internal successors, (5505), 15 states have internal predecessors, (5505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:05,868 INFO L175 Difference]: Start difference. First operand has 68 places, 79 transitions, 820 flow. Second operand 14 states and 1929 transitions. [2023-11-19 07:37:05,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 137 transitions, 1535 flow [2023-11-19 07:37:05,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 137 transitions, 1461 flow, removed 35 selfloop flow, removed 2 redundant places. [2023-11-19 07:37:05,882 INFO L231 Difference]: Finished difference. Result has 80 places, 97 transitions, 1055 flow [2023-11-19 07:37:05,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1055, PETRI_PLACES=80, PETRI_TRANSITIONS=97} [2023-11-19 07:37:05,883 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 59 predicate places. [2023-11-19 07:37:05,883 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 97 transitions, 1055 flow [2023-11-19 07:37:05,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 135.0) internal successors, (2025), 15 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:05,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:05,884 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:05,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:06,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 07:37:06,102 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:37:06,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:06,103 INFO L85 PathProgramCache]: Analyzing trace with hash -2095405780, now seen corresponding path program 5 times [2023-11-19 07:37:06,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:06,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122231801] [2023-11-19 07:37:06,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:06,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:07,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:07,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122231801] [2023-11-19 07:37:07,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122231801] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:07,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183356028] [2023-11-19 07:37:07,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:37:07,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:07,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:07,505 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:07,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:37:07,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:37:07,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:37:07,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-19 07:37:07,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:07,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-19 07:37:07,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 07:37:07,906 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:37:07,907 INFO L378 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-11-19 07:37:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:37:07,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:08,136 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:37:08,137 INFO L378 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 114 [2023-11-19 07:37:08,165 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:37:08,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 48 [2023-11-19 07:37:08,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:37:08,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183356028] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:08,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:08,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 19 [2023-11-19 07:37:08,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233030846] [2023-11-19 07:37:08,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:08,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:37:08,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:08,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:37:08,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=350, Unknown=2, NotChecked=0, Total=420 [2023-11-19 07:37:09,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 367 [2023-11-19 07:37:09,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 97 transitions, 1055 flow. Second operand has 21 states, 21 states have (on average 112.19047619047619) internal successors, (2356), 21 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:09,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:09,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 367 [2023-11-19 07:37:09,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:10,707 INFO L124 PetriNetUnfolderBase]: 535/957 cut-off events. [2023-11-19 07:37:10,708 INFO L125 PetriNetUnfolderBase]: For 4573/4573 co-relation queries the response was YES. [2023-11-19 07:37:10,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5132 conditions, 957 events. 535/957 cut-off events. For 4573/4573 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4443 event pairs, 90 based on Foata normal form. 1/958 useless extension candidates. Maximal degree in co-relation 4656. Up to 517 conditions per place. [2023-11-19 07:37:10,721 INFO L140 encePairwiseOnDemand]: 360/367 looper letters, 106 selfloop transitions, 64 changer transitions 1/171 dead transitions. [2023-11-19 07:37:10,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 171 transitions, 1963 flow [2023-11-19 07:37:10,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:37:10,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-19 07:37:10,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1743 transitions. [2023-11-19 07:37:10,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31662125340599456 [2023-11-19 07:37:10,729 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1743 transitions. [2023-11-19 07:37:10,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1743 transitions. [2023-11-19 07:37:10,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:10,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1743 transitions. [2023-11-19 07:37:10,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 116.2) internal successors, (1743), 15 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:10,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 367.0) internal successors, (5872), 16 states have internal predecessors, (5872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:10,746 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 367.0) internal successors, (5872), 16 states have internal predecessors, (5872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:10,746 INFO L175 Difference]: Start difference. First operand has 80 places, 97 transitions, 1055 flow. Second operand 15 states and 1743 transitions. [2023-11-19 07:37:10,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 171 transitions, 1963 flow [2023-11-19 07:37:10,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 171 transitions, 1838 flow, removed 52 selfloop flow, removed 5 redundant places. [2023-11-19 07:37:10,768 INFO L231 Difference]: Finished difference. Result has 90 places, 123 transitions, 1417 flow [2023-11-19 07:37:10,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1417, PETRI_PLACES=90, PETRI_TRANSITIONS=123} [2023-11-19 07:37:10,769 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 69 predicate places. [2023-11-19 07:37:10,770 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 123 transitions, 1417 flow [2023-11-19 07:37:10,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 112.19047619047619) internal successors, (2356), 21 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:10,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:10,771 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:10,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:10,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:10,985 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:37:10,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:10,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1514258668, now seen corresponding path program 6 times [2023-11-19 07:37:10,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:10,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308109719] [2023-11-19 07:37:10,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:10,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:11,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:11,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308109719] [2023-11-19 07:37:11,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308109719] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:11,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755464495] [2023-11-19 07:37:11,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:37:11,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:11,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:11,821 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:11,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:37:11,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-19 07:37:11,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:37:11,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-19 07:37:11,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:12,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:37:12,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 07:37:12,175 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:37:12,175 INFO L378 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-11-19 07:37:12,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:37:12,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:12,336 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:37:12,336 INFO L378 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 114 [2023-11-19 07:37:12,361 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:37:12,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 48 [2023-11-19 07:37:12,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:37:12,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755464495] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:12,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:12,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 18 [2023-11-19 07:37:12,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011253246] [2023-11-19 07:37:12,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:12,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:37:12,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:12,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:37:12,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=315, Unknown=3, NotChecked=0, Total=380 [2023-11-19 07:37:13,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 367 [2023-11-19 07:37:13,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 123 transitions, 1417 flow. Second operand has 20 states, 20 states have (on average 115.3) internal successors, (2306), 20 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:13,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:13,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 367 [2023-11-19 07:37:13,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:14,255 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* c_~x1~0 4) c_~f~0.offset)) (.cse2 (+ (* c_~x2~0 4) c_~f~0.offset))) (and (forall ((v_ArrVal_305 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_305) c_~f~0.base))) (= (select .cse0 .cse1) (select .cse0 (+ c_~f~0.offset (* 4 (select .cse0 .cse2))))))) (let ((.cse3 (select |c_#memory_int| c_~f~0.base))) (= (select .cse3 .cse1) (select .cse3 (+ (* (select .cse3 .cse2) 4) c_~f~0.offset)))))) is different from false [2023-11-19 07:37:14,607 INFO L124 PetriNetUnfolderBase]: 662/1189 cut-off events. [2023-11-19 07:37:14,607 INFO L125 PetriNetUnfolderBase]: For 6892/6892 co-relation queries the response was YES. [2023-11-19 07:37:14,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6510 conditions, 1189 events. 662/1189 cut-off events. For 6892/6892 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5833 event pairs, 137 based on Foata normal form. 2/1191 useless extension candidates. Maximal degree in co-relation 5999. Up to 859 conditions per place. [2023-11-19 07:37:14,623 INFO L140 encePairwiseOnDemand]: 358/367 looper letters, 128 selfloop transitions, 63 changer transitions 2/193 dead transitions. [2023-11-19 07:37:14,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 193 transitions, 2364 flow [2023-11-19 07:37:14,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:37:14,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-19 07:37:14,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2018 transitions. [2023-11-19 07:37:14,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32344927071646096 [2023-11-19 07:37:14,632 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2018 transitions. [2023-11-19 07:37:14,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2018 transitions. [2023-11-19 07:37:14,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:14,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2018 transitions. [2023-11-19 07:37:14,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 118.70588235294117) internal successors, (2018), 17 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:14,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 367.0) internal successors, (6606), 18 states have internal predecessors, (6606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:14,653 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 367.0) internal successors, (6606), 18 states have internal predecessors, (6606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:14,653 INFO L175 Difference]: Start difference. First operand has 90 places, 123 transitions, 1417 flow. Second operand 17 states and 2018 transitions. [2023-11-19 07:37:14,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 193 transitions, 2364 flow [2023-11-19 07:37:14,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 193 transitions, 2224 flow, removed 54 selfloop flow, removed 7 redundant places. [2023-11-19 07:37:14,684 INFO L231 Difference]: Finished difference. Result has 103 places, 147 transitions, 1782 flow [2023-11-19 07:37:14,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=1285, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1782, PETRI_PLACES=103, PETRI_TRANSITIONS=147} [2023-11-19 07:37:14,685 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 82 predicate places. [2023-11-19 07:37:14,685 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 147 transitions, 1782 flow [2023-11-19 07:37:14,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 115.3) internal successors, (2306), 20 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:14,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:14,686 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:14,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-19 07:37:14,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:14,907 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:37:14,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:14,908 INFO L85 PathProgramCache]: Analyzing trace with hash 648311084, now seen corresponding path program 7 times [2023-11-19 07:37:14,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:14,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527959167] [2023-11-19 07:37:14,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:14,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:16,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:16,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527959167] [2023-11-19 07:37:16,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527959167] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:16,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433585499] [2023-11-19 07:37:16,163 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:37:16,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:16,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:16,165 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:16,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:37:16,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:16,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 07:37:16,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:16,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:37:16,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 17 [2023-11-19 07:37:16,507 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:37:16,507 INFO L378 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2023-11-19 07:37:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:37:16,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:16,560 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_334 (Array Int Int))) (= c_~x1~0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_334) c_~f~0.base))) (select .cse0 (+ c_~f~0.offset (* 4 (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)))))))) is different from false [2023-11-19 07:37:16,649 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:37:16,650 INFO L378 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 108 [2023-11-19 07:37:16,665 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:37:16,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 36 [2023-11-19 07:37:16,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-11-19 07:37:16,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433585499] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:16,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:16,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 19 [2023-11-19 07:37:16,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278767520] [2023-11-19 07:37:16,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:16,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:37:16,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:16,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:37:16,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=319, Unknown=3, NotChecked=36, Total=420 [2023-11-19 07:37:16,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 367 [2023-11-19 07:37:16,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 147 transitions, 1782 flow. Second operand has 21 states, 21 states have (on average 112.19047619047619) internal successors, (2356), 21 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:16,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:16,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 367 [2023-11-19 07:37:16,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:17,913 INFO L124 PetriNetUnfolderBase]: 836/1496 cut-off events. [2023-11-19 07:37:17,914 INFO L125 PetriNetUnfolderBase]: For 9391/9391 co-relation queries the response was YES. [2023-11-19 07:37:17,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8853 conditions, 1496 events. 836/1496 cut-off events. For 9391/9391 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7772 event pairs, 161 based on Foata normal form. 1/1497 useless extension candidates. Maximal degree in co-relation 8278. Up to 991 conditions per place. [2023-11-19 07:37:17,933 INFO L140 encePairwiseOnDemand]: 358/367 looper letters, 138 selfloop transitions, 77 changer transitions 1/216 dead transitions. [2023-11-19 07:37:17,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 216 transitions, 2822 flow [2023-11-19 07:37:17,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:37:17,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-19 07:37:17,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1740 transitions. [2023-11-19 07:37:17,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31607629427792916 [2023-11-19 07:37:17,940 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1740 transitions. [2023-11-19 07:37:17,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1740 transitions. [2023-11-19 07:37:17,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:17,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1740 transitions. [2023-11-19 07:37:17,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 116.0) internal successors, (1740), 15 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:17,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 367.0) internal successors, (5872), 16 states have internal predecessors, (5872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:17,957 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 367.0) internal successors, (5872), 16 states have internal predecessors, (5872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:17,957 INFO L175 Difference]: Start difference. First operand has 103 places, 147 transitions, 1782 flow. Second operand 15 states and 1740 transitions. [2023-11-19 07:37:17,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 216 transitions, 2822 flow [2023-11-19 07:37:17,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 216 transitions, 2609 flow, removed 85 selfloop flow, removed 8 redundant places. [2023-11-19 07:37:17,990 INFO L231 Difference]: Finished difference. Result has 112 places, 174 transitions, 2167 flow [2023-11-19 07:37:17,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=1569, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2167, PETRI_PLACES=112, PETRI_TRANSITIONS=174} [2023-11-19 07:37:17,992 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 91 predicate places. [2023-11-19 07:37:17,992 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 174 transitions, 2167 flow [2023-11-19 07:37:17,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 112.19047619047619) internal successors, (2356), 21 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:17,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:17,994 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:18,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:18,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 07:37:18,221 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:37:18,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:18,221 INFO L85 PathProgramCache]: Analyzing trace with hash -2143784110, now seen corresponding path program 8 times [2023-11-19 07:37:18,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:18,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893308313] [2023-11-19 07:37:18,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:18,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:37:18,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:18,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893308313] [2023-11-19 07:37:18,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893308313] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:18,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774720013] [2023-11-19 07:37:18,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:37:18,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:18,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:18,502 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:18,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:37:18,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:37:18,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:37:18,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:37:18,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:37:18,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:37:18,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774720013] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:18,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:18,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-11-19 07:37:18,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490603831] [2023-11-19 07:37:18,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:18,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:37:18,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:18,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:37:18,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:37:19,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 367 [2023-11-19 07:37:19,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 174 transitions, 2167 flow. Second operand has 14 states, 14 states have (on average 148.35714285714286) internal successors, (2077), 14 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:19,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:19,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 367 [2023-11-19 07:37:19,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:20,266 INFO L124 PetriNetUnfolderBase]: 1089/2070 cut-off events. [2023-11-19 07:37:20,267 INFO L125 PetriNetUnfolderBase]: For 16001/16001 co-relation queries the response was YES. [2023-11-19 07:37:20,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12801 conditions, 2070 events. 1089/2070 cut-off events. For 16001/16001 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12610 event pairs, 69 based on Foata normal form. 52/2122 useless extension candidates. Maximal degree in co-relation 11530. Up to 853 conditions per place. [2023-11-19 07:37:20,305 INFO L140 encePairwiseOnDemand]: 361/367 looper letters, 214 selfloop transitions, 142 changer transitions 30/386 dead transitions. [2023-11-19 07:37:20,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 386 transitions, 5157 flow [2023-11-19 07:37:20,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 07:37:20,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-19 07:37:20,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3190 transitions. [2023-11-19 07:37:20,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4139094329830025 [2023-11-19 07:37:20,311 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3190 transitions. [2023-11-19 07:37:20,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3190 transitions. [2023-11-19 07:37:20,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:20,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3190 transitions. [2023-11-19 07:37:20,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 151.9047619047619) internal successors, (3190), 21 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:20,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 367.0) internal successors, (8074), 22 states have internal predecessors, (8074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:20,335 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 367.0) internal successors, (8074), 22 states have internal predecessors, (8074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:20,336 INFO L175 Difference]: Start difference. First operand has 112 places, 174 transitions, 2167 flow. Second operand 21 states and 3190 transitions. [2023-11-19 07:37:20,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 386 transitions, 5157 flow [2023-11-19 07:37:20,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 386 transitions, 4932 flow, removed 80 selfloop flow, removed 9 redundant places. [2023-11-19 07:37:20,395 INFO L231 Difference]: Finished difference. Result has 135 places, 261 transitions, 3675 flow [2023-11-19 07:37:20,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=2004, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3675, PETRI_PLACES=135, PETRI_TRANSITIONS=261} [2023-11-19 07:37:20,396 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 114 predicate places. [2023-11-19 07:37:20,396 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 261 transitions, 3675 flow [2023-11-19 07:37:20,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 148.35714285714286) internal successors, (2077), 14 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:20,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:20,397 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:20,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-19 07:37:20,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-19 07:37:20,618 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:37:20,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:20,619 INFO L85 PathProgramCache]: Analyzing trace with hash -285354460, now seen corresponding path program 9 times [2023-11-19 07:37:20,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:20,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023955534] [2023-11-19 07:37:20,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:20,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:20,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:37:20,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:20,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023955534] [2023-11-19 07:37:20,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023955534] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:20,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274035708] [2023-11-19 07:37:20,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:37:20,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:20,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:20,887 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:20,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b491f550-e17b-4a1e-8428-825062caaa5c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process