./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure3.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_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/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_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/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_714bdba5-a14e-484a-bdf8-d84fb325b1c1/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 a479da07a0fc6d1ad250c3f67241d6294523a3c8fee4f6d465a7a5bdc9204f86 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:36:36,841 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:36:36,970 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:36:36,978 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:36:36,979 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:36:37,024 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:36:37,026 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:36:37,026 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:36:37,027 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:36:37,033 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:36:37,034 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:36:37,035 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:36:37,035 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:36:37,037 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:36:37,038 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:36:37,038 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:36:37,039 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:36:37,039 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:36:37,040 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:36:37,040 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:36:37,041 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:36:37,041 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:36:37,042 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:36:37,042 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:36:37,043 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:36:37,044 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:36:37,044 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:36:37,044 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:36:37,045 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:36:37,045 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:36:37,047 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:36:37,047 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:36:37,047 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:36:37,048 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:36:37,048 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:36:37,048 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:36:37,049 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:36:37,049 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:36:37,049 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:36:37,049 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_714bdba5-a14e-484a-bdf8-d84fb325b1c1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a479da07a0fc6d1ad250c3f67241d6294523a3c8fee4f6d465a7a5bdc9204f86 [2023-11-19 07:36:37,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:36:37,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:36:37,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:36:37,409 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:36:37,409 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:36:37,411 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2023-11-19 07:36:40,724 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:36:40,997 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:36:40,998 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2023-11-19 07:36:41,007 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/data/658c46b8f/14532ffae884436a94579fe84c0ef3cb/FLAG822a12bd9 [2023-11-19 07:36:41,023 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/data/658c46b8f/14532ffae884436a94579fe84c0ef3cb [2023-11-19 07:36:41,026 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:36:41,027 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:36:41,029 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:36:41,029 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:36:41,035 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:36:41,036 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:36:41" (1/1) ... [2023-11-19 07:36:41,037 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3caf15e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:41, skipping insertion in model container [2023-11-19 07:36:41,037 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:36:41" (1/1) ... [2023-11-19 07:36:41,069 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:36:41,252 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_714bdba5-a14e-484a-bdf8-d84fb325b1c1/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2147,2160] [2023-11-19 07:36:41,257 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:36:41,269 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:36:41,292 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_714bdba5-a14e-484a-bdf8-d84fb325b1c1/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2147,2160] [2023-11-19 07:36:41,293 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:36:41,301 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:36:41,302 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:36:41,310 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:36:41,311 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:41 WrapperNode [2023-11-19 07:36:41,311 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:36:41,313 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:36:41,313 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:36:41,313 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:36:41,321 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:41" (1/1) ... [2023-11-19 07:36:41,329 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:41" (1/1) ... [2023-11-19 07:36:41,350 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2023-11-19 07:36:41,351 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:36:41,352 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:36:41,352 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:36:41,352 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:36:41,362 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:41" (1/1) ... [2023-11-19 07:36:41,363 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:41" (1/1) ... [2023-11-19 07:36:41,365 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:41" (1/1) ... [2023-11-19 07:36:41,366 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:41" (1/1) ... [2023-11-19 07:36:41,371 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:41" (1/1) ... [2023-11-19 07:36:41,375 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:41" (1/1) ... [2023-11-19 07:36:41,376 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:41" (1/1) ... [2023-11-19 07:36:41,378 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:41" (1/1) ... [2023-11-19 07:36:41,380 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:36:41,381 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:36:41,381 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:36:41,381 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:36:41,383 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:41" (1/1) ... [2023-11-19 07:36:41,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:36:41,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:41,422 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:36:41,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:36:41,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:36:41,474 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:36:41,474 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:36:41,474 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:36:41,474 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:36:41,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:36:41,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:36:41,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:36:41,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:36:41,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:36:41,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:36:41,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:36:41,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:36:41,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:36:41,480 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 07:36:41,625 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:36:41,627 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:36:41,823 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:36:41,891 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:36:41,891 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:36:41,897 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:36:41 BoogieIcfgContainer [2023-11-19 07:36:41,897 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:36:41,900 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:36:41,901 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:36:41,904 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:36:41,904 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:36:41" (1/3) ... [2023-11-19 07:36:41,905 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1039c5b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:36:41, skipping insertion in model container [2023-11-19 07:36:41,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:41" (2/3) ... [2023-11-19 07:36:41,906 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1039c5b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:36:41, skipping insertion in model container [2023-11-19 07:36:41,906 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:36:41" (3/3) ... [2023-11-19 07:36:41,907 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2023-11-19 07:36:41,919 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:36:41,940 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:36:41,940 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:36:41,940 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:36:42,029 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:36:42,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 192 flow [2023-11-19 07:36:42,196 INFO L124 PetriNetUnfolderBase]: 6/87 cut-off events. [2023-11-19 07:36:42,196 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:36:42,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 6/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2023-11-19 07:36:42,201 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 192 flow [2023-11-19 07:36:42,206 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 78 transitions, 168 flow [2023-11-19 07:36:42,210 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:36:42,226 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 78 transitions, 168 flow [2023-11-19 07:36:42,229 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 78 transitions, 168 flow [2023-11-19 07:36:42,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 78 transitions, 168 flow [2023-11-19 07:36:42,272 INFO L124 PetriNetUnfolderBase]: 6/78 cut-off events. [2023-11-19 07:36:42,273 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:36:42,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 78 events. 6/78 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2023-11-19 07:36:42,276 INFO L119 LiptonReduction]: Number of co-enabled transitions 648 [2023-11-19 07:36:44,626 INFO L134 LiptonReduction]: Checked pairs total: 647 [2023-11-19 07:36:44,626 INFO L136 LiptonReduction]: Total number of compositions: 72 [2023-11-19 07:36:44,654 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:36:44,661 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;@14eb3126, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:36:44,661 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:36:44,670 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:36:44,670 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-19 07:36:44,671 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:36:44,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:44,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:44,672 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 07:36:44,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:44,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1212107646, now seen corresponding path program 1 times [2023-11-19 07:36:44,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:44,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800450897] [2023-11-19 07:36:44,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:44,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:45,175 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 07:36:45,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:45,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800450897] [2023-11-19 07:36:45,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800450897] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:45,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:45,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:36:45,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705762855] [2023-11-19 07:36:45,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:45,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:45,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:45,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:45,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:45,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 161 [2023-11-19 07:36:45,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states 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 07:36:45,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:45,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 161 [2023-11-19 07:36:45,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:45,377 INFO L124 PetriNetUnfolderBase]: 60/116 cut-off events. [2023-11-19 07:36:45,378 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-19 07:36:45,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 116 events. 60/116 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 303 event pairs, 24 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 188. Up to 61 conditions per place. [2023-11-19 07:36:45,383 INFO L140 encePairwiseOnDemand]: 157/161 looper letters, 19 selfloop transitions, 2 changer transitions 4/25 dead transitions. [2023-11-19 07:36:45,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 121 flow [2023-11-19 07:36:45,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:45,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:36:45,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 258 transitions. [2023-11-19 07:36:45,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341614906832298 [2023-11-19 07:36:45,410 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 258 transitions. [2023-11-19 07:36:45,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 258 transitions. [2023-11-19 07:36:45,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:45,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 258 transitions. [2023-11-19 07:36:45,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states 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 07:36:45,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states 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 07:36:45,428 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states 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 07:36:45,431 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 258 transitions. [2023-11-19 07:36:45,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 121 flow [2023-11-19 07:36:45,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 25 transitions, 107 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:36:45,436 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 48 flow [2023-11-19 07:36:45,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=16} [2023-11-19 07:36:45,442 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-11-19 07:36:45,443 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 48 flow [2023-11-19 07:36:45,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states 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 07:36:45,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:45,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:45,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:36:45,444 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 07:36:45,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:45,445 INFO L85 PathProgramCache]: Analyzing trace with hash 350671970, now seen corresponding path program 1 times [2023-11-19 07:36:45,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:45,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669068353] [2023-11-19 07:36:45,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:45,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:45,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:45,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669068353] [2023-11-19 07:36:45,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669068353] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:45,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:45,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:36:45,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243212098] [2023-11-19 07:36:45,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:45,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:36:45,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:45,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:36:45,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:36:45,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 161 [2023-11-19 07:36:45,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states 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 07:36:45,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:45,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 161 [2023-11-19 07:36:45,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:45,822 INFO L124 PetriNetUnfolderBase]: 66/126 cut-off events. [2023-11-19 07:36:45,823 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-19 07:36:45,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 126 events. 66/126 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 340 event pairs, 37 based on Foata normal form. 2/128 useless extension candidates. Maximal degree in co-relation 130. Up to 106 conditions per place. [2023-11-19 07:36:45,826 INFO L140 encePairwiseOnDemand]: 156/161 looper letters, 19 selfloop transitions, 4 changer transitions 5/28 dead transitions. [2023-11-19 07:36:45,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 132 flow [2023-11-19 07:36:45,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:36:45,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:36:45,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 364 transitions. [2023-11-19 07:36:45,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45217391304347826 [2023-11-19 07:36:45,831 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 364 transitions. [2023-11-19 07:36:45,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 364 transitions. [2023-11-19 07:36:45,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:45,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 364 transitions. [2023-11-19 07:36:45,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 07:36:45,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:45,844 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:45,844 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 48 flow. Second operand 5 states and 364 transitions. [2023-11-19 07:36:45,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 132 flow [2023-11-19 07:36:45,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 28 transitions, 129 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:36:45,847 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 75 flow [2023-11-19 07:36:45,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=75, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-11-19 07:36:45,850 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-11-19 07:36:45,850 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 75 flow [2023-11-19 07:36:45,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states 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 07:36:45,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:45,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:45,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:36:45,858 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 07:36:45,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:45,862 INFO L85 PathProgramCache]: Analyzing trace with hash -5632642, now seen corresponding path program 2 times [2023-11-19 07:36:45,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:45,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476389598] [2023-11-19 07:36:45,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:45,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:46,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:46,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:46,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476389598] [2023-11-19 07:36:46,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476389598] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:46,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289888459] [2023-11-19 07:36:46,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:36:46,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:46,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:46,124 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:46,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:36:46,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:36:46,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:36:46,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:36:46,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:46,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:46,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:46,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289888459] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:46,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:36:46,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-11-19 07:36:46,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168071192] [2023-11-19 07:36:46,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:46,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:36:46,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:46,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:36:46,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:36:46,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 161 [2023-11-19 07:36:46,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 74.5) internal successors, (298), 4 states have internal predecessors, (298), 0 states have call successors, (0), 0 states 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 07:36:46,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:46,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 161 [2023-11-19 07:36:46,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:46,590 INFO L124 PetriNetUnfolderBase]: 56/105 cut-off events. [2023-11-19 07:36:46,590 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-11-19 07:36:46,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 105 events. 56/105 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 263 event pairs, 10 based on Foata normal form. 6/111 useless extension candidates. Maximal degree in co-relation 197. Up to 62 conditions per place. [2023-11-19 07:36:46,592 INFO L140 encePairwiseOnDemand]: 157/161 looper letters, 25 selfloop transitions, 4 changer transitions 0/29 dead transitions. [2023-11-19 07:36:46,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 29 transitions, 171 flow [2023-11-19 07:36:46,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:36:46,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:36:46,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 312 transitions. [2023-11-19 07:36:46,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484472049689441 [2023-11-19 07:36:46,595 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 312 transitions. [2023-11-19 07:36:46,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 312 transitions. [2023-11-19 07:36:46,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:46,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 312 transitions. [2023-11-19 07:36:46,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states 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 07:36:46,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 161.0) internal successors, (805), 5 states have internal predecessors, (805), 0 states have call successors, (0), 0 states 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 07:36:46,600 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 161.0) internal successors, (805), 5 states have internal predecessors, (805), 0 states have call successors, (0), 0 states 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 07:36:46,600 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 75 flow. Second operand 4 states and 312 transitions. [2023-11-19 07:36:46,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 29 transitions, 171 flow [2023-11-19 07:36:46,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 29 transitions, 155 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-19 07:36:46,604 INFO L231 Difference]: Finished difference. Result has 26 places, 20 transitions, 89 flow [2023-11-19 07:36:46,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=26, PETRI_TRANSITIONS=20} [2023-11-19 07:36:46,605 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 6 predicate places. [2023-11-19 07:36:46,605 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 20 transitions, 89 flow [2023-11-19 07:36:46,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.5) internal successors, (298), 4 states have internal predecessors, (298), 0 states have call successors, (0), 0 states 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 07:36:46,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:46,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:46,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:46,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:46,827 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 07:36:46,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:46,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1459922320, now seen corresponding path program 3 times [2023-11-19 07:36:46,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:46,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292016661] [2023-11-19 07:36:46,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:46,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:46,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:46,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292016661] [2023-11-19 07:36:46,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292016661] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:46,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:46,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:36:46,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077892503] [2023-11-19 07:36:46,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:46,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:36:46,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:46,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:36:46,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:36:46,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 161 [2023-11-19 07:36:46,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 20 transitions, 89 flow. Second operand has 5 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states 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 07:36:46,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:46,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 161 [2023-11-19 07:36:46,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:47,079 INFO L124 PetriNetUnfolderBase]: 69/126 cut-off events. [2023-11-19 07:36:47,080 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2023-11-19 07:36:47,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 126 events. 69/126 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 316 event pairs, 19 based on Foata normal form. 2/128 useless extension candidates. Maximal degree in co-relation 159. Up to 89 conditions per place. [2023-11-19 07:36:47,082 INFO L140 encePairwiseOnDemand]: 156/161 looper letters, 22 selfloop transitions, 8 changer transitions 2/32 dead transitions. [2023-11-19 07:36:47,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 32 transitions, 202 flow [2023-11-19 07:36:47,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:36:47,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:36:47,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 363 transitions. [2023-11-19 07:36:47,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4509316770186335 [2023-11-19 07:36:47,086 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 363 transitions. [2023-11-19 07:36:47,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 363 transitions. [2023-11-19 07:36:47,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:47,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 363 transitions. [2023-11-19 07:36:47,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.6) internal successors, (363), 5 states have internal predecessors, (363), 0 states have call successors, (0), 0 states 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 07:36:47,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:47,091 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:47,092 INFO L175 Difference]: Start difference. First operand has 26 places, 20 transitions, 89 flow. Second operand 5 states and 363 transitions. [2023-11-19 07:36:47,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 32 transitions, 202 flow [2023-11-19 07:36:47,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 197 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:36:47,095 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 144 flow [2023-11-19 07:36:47,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=144, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-11-19 07:36:47,096 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2023-11-19 07:36:47,097 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 144 flow [2023-11-19 07:36:47,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states 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 07:36:47,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:47,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:47,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:36:47,098 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 07:36:47,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:47,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1308771928, now seen corresponding path program 4 times [2023-11-19 07:36:47,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:47,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253361362] [2023-11-19 07:36:47,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:47,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:47,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:47,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:47,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253361362] [2023-11-19 07:36:47,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253361362] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:47,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:47,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:36:47,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244829657] [2023-11-19 07:36:47,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:47,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:36:47,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:47,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:36:47,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:36:47,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 161 [2023-11-19 07:36:47,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 70.8) internal successors, (354), 5 states have internal predecessors, (354), 0 states have call successors, (0), 0 states 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 07:36:47,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:47,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 161 [2023-11-19 07:36:47,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:47,358 INFO L124 PetriNetUnfolderBase]: 66/129 cut-off events. [2023-11-19 07:36:47,358 INFO L125 PetriNetUnfolderBase]: For 272/272 co-relation queries the response was YES. [2023-11-19 07:36:47,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 518 conditions, 129 events. 66/129 cut-off events. For 272/272 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 332 event pairs, 21 based on Foata normal form. 4/133 useless extension candidates. Maximal degree in co-relation 230. Up to 75 conditions per place. [2023-11-19 07:36:47,361 INFO L140 encePairwiseOnDemand]: 156/161 looper letters, 29 selfloop transitions, 6 changer transitions 2/37 dead transitions. [2023-11-19 07:36:47,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 37 transitions, 261 flow [2023-11-19 07:36:47,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:36:47,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:36:47,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 373 transitions. [2023-11-19 07:36:47,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46335403726708074 [2023-11-19 07:36:47,365 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 373 transitions. [2023-11-19 07:36:47,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 373 transitions. [2023-11-19 07:36:47,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:47,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 373 transitions. [2023-11-19 07:36:47,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 74.6) internal successors, (373), 5 states have internal predecessors, (373), 0 states have call successors, (0), 0 states 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 07:36:47,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:47,371 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:47,371 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 144 flow. Second operand 5 states and 373 transitions. [2023-11-19 07:36:47,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 37 transitions, 261 flow [2023-11-19 07:36:47,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 37 transitions, 247 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-19 07:36:47,377 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 149 flow [2023-11-19 07:36:47,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2023-11-19 07:36:47,378 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 15 predicate places. [2023-11-19 07:36:47,378 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 149 flow [2023-11-19 07:36:47,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.8) internal successors, (354), 5 states have internal predecessors, (354), 0 states have call successors, (0), 0 states 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 07:36:47,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:47,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:47,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:36:47,380 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 07:36:47,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:47,381 INFO L85 PathProgramCache]: Analyzing trace with hash -961948964, now seen corresponding path program 5 times [2023-11-19 07:36:47,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:47,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521542105] [2023-11-19 07:36:47,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:47,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:47,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:47,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:47,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521542105] [2023-11-19 07:36:47,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521542105] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:47,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184847148] [2023-11-19 07:36:47,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:36:47,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:47,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:47,482 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:47,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:36:47,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:36:47,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:36:47,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:36:47,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:47,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:47,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184847148] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:47,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:36:47,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-11-19 07:36:47,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024174838] [2023-11-19 07:36:47,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:47,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:36:47,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:47,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:36:47,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:36:47,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 161 [2023-11-19 07:36:47,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 149 flow. Second operand has 7 states, 7 states have (on average 70.28571428571429) internal successors, (492), 7 states have internal predecessors, (492), 0 states have call successors, (0), 0 states 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 07:36:47,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:47,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 161 [2023-11-19 07:36:47,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:47,895 INFO L124 PetriNetUnfolderBase]: 84/161 cut-off events. [2023-11-19 07:36:47,896 INFO L125 PetriNetUnfolderBase]: For 540/540 co-relation queries the response was YES. [2023-11-19 07:36:47,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 661 conditions, 161 events. 84/161 cut-off events. For 540/540 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 466 event pairs, 28 based on Foata normal form. 6/167 useless extension candidates. Maximal degree in co-relation 348. Up to 116 conditions per place. [2023-11-19 07:36:47,898 INFO L140 encePairwiseOnDemand]: 155/161 looper letters, 33 selfloop transitions, 15 changer transitions 1/49 dead transitions. [2023-11-19 07:36:47,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 49 transitions, 364 flow [2023-11-19 07:36:47,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:36:47,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:36:47,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 581 transitions. [2023-11-19 07:36:47,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45108695652173914 [2023-11-19 07:36:47,902 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 581 transitions. [2023-11-19 07:36:47,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 581 transitions. [2023-11-19 07:36:47,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:47,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 581 transitions. [2023-11-19 07:36:47,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 72.625) internal successors, (581), 8 states have internal predecessors, (581), 0 states have call successors, (0), 0 states 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 07:36:47,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 161.0) internal successors, (1449), 9 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states 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 07:36:47,909 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 161.0) internal successors, (1449), 9 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states 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 07:36:47,909 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 149 flow. Second operand 8 states and 581 transitions. [2023-11-19 07:36:47,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 49 transitions, 364 flow [2023-11-19 07:36:47,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 49 transitions, 342 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-19 07:36:47,914 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 239 flow [2023-11-19 07:36:47,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=239, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2023-11-19 07:36:47,915 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2023-11-19 07:36:47,915 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 239 flow [2023-11-19 07:36:47,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 70.28571428571429) internal successors, (492), 7 states have internal predecessors, (492), 0 states have call successors, (0), 0 states 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 07:36:47,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:47,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:47,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:48,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:48,136 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 07:36:48,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:48,136 INFO L85 PathProgramCache]: Analyzing trace with hash 2116877232, now seen corresponding path program 6 times [2023-11-19 07:36:48,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:48,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100705769] [2023-11-19 07:36:48,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:48,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:48,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:48,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100705769] [2023-11-19 07:36:48,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100705769] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:48,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31436869] [2023-11-19 07:36:48,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:36:48,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:48,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:48,256 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:48,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:36:48,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-19 07:36:48,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:36:48,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:36:48,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:48,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:48,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31436869] 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 [1675233804] [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 07:36:48,447 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 07:36:48,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:36:48,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 161 [2023-11-19 07:36:48,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 239 flow. Second operand has 8 states, 8 states have (on average 69.5) internal successors, (556), 8 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 07:36:48,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:48,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 161 [2023-11-19 07:36:48,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:48,622 INFO L124 PetriNetUnfolderBase]: 77/144 cut-off events. [2023-11-19 07:36:48,622 INFO L125 PetriNetUnfolderBase]: For 564/564 co-relation queries the response was YES. [2023-11-19 07:36:48,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669 conditions, 144 events. 77/144 cut-off events. For 564/564 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 381 event pairs, 21 based on Foata normal form. 6/150 useless extension candidates. Maximal degree in co-relation 549. Up to 91 conditions per place. [2023-11-19 07:36:48,625 INFO L140 encePairwiseOnDemand]: 156/161 looper letters, 26 selfloop transitions, 13 changer transitions 0/39 dead transitions. [2023-11-19 07:36:48,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 39 transitions, 337 flow [2023-11-19 07:36:48,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:36:48,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:36:48,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 366 transitions. [2023-11-19 07:36:48,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4546583850931677 [2023-11-19 07:36:48,628 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 366 transitions. [2023-11-19 07:36:48,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 366 transitions. [2023-11-19 07:36:48,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:48,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 366 transitions. [2023-11-19 07:36:48,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 73.2) internal successors, (366), 5 states have internal predecessors, (366), 0 states have call successors, (0), 0 states 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 07:36:48,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:48,632 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:48,632 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 239 flow. Second operand 5 states and 366 transitions. [2023-11-19 07:36:48,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 39 transitions, 337 flow [2023-11-19 07:36:48,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 39 transitions, 310 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-11-19 07:36:48,637 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 226 flow [2023-11-19 07:36:48,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=226, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2023-11-19 07:36:48,638 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2023-11-19 07:36:48,638 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 226 flow [2023-11-19 07:36:48,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 69.5) internal successors, (556), 8 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 07:36:48,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:48,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:48,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:48,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:36:48,852 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 07:36:48,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:48,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1343508673, now seen corresponding path program 1 times [2023-11-19 07:36:48,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:48,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204787342] [2023-11-19 07:36:48,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:48,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:48,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:49,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:49,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204787342] [2023-11-19 07:36:49,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204787342] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:49,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945434170] [2023-11-19 07:36:49,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:49,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:49,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:49,028 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:49,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:36:49,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:49,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:36:49,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:49,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:49,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:49,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:49,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945434170] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:49,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:36:49,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 4 [2023-11-19 07:36:49,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079623450] [2023-11-19 07:36:49,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:49,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:36:49,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:49,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:36:49,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:36:49,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 161 [2023-11-19 07:36:49,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 226 flow. Second operand has 6 states, 6 states have (on average 80.16666666666667) internal successors, (481), 6 states have internal predecessors, (481), 0 states have call successors, (0), 0 states 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 07:36:49,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:49,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 161 [2023-11-19 07:36:49,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:49,339 INFO L124 PetriNetUnfolderBase]: 142/268 cut-off events. [2023-11-19 07:36:49,339 INFO L125 PetriNetUnfolderBase]: For 945/945 co-relation queries the response was YES. [2023-11-19 07:36:49,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1215 conditions, 268 events. 142/268 cut-off events. For 945/945 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 953 event pairs, 22 based on Foata normal form. 7/275 useless extension candidates. Maximal degree in co-relation 989. Up to 130 conditions per place. [2023-11-19 07:36:49,343 INFO L140 encePairwiseOnDemand]: 157/161 looper letters, 40 selfloop transitions, 11 changer transitions 6/57 dead transitions. [2023-11-19 07:36:49,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 57 transitions, 500 flow [2023-11-19 07:36:49,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:36:49,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:36:49,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 339 transitions. [2023-11-19 07:36:49,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5263975155279503 [2023-11-19 07:36:49,346 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 339 transitions. [2023-11-19 07:36:49,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 339 transitions. [2023-11-19 07:36:49,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:49,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 339 transitions. [2023-11-19 07:36:49,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 84.75) internal successors, (339), 4 states have internal predecessors, (339), 0 states have call successors, (0), 0 states 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 07:36:49,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 161.0) internal successors, (805), 5 states have internal predecessors, (805), 0 states have call successors, (0), 0 states 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 07:36:49,350 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 161.0) internal successors, (805), 5 states have internal predecessors, (805), 0 states have call successors, (0), 0 states 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 07:36:49,350 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 226 flow. Second operand 4 states and 339 transitions. [2023-11-19 07:36:49,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 57 transitions, 500 flow [2023-11-19 07:36:49,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 57 transitions, 468 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:36:49,356 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 317 flow [2023-11-19 07:36:49,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=317, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2023-11-19 07:36:49,359 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 23 predicate places. [2023-11-19 07:36:49,360 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 317 flow [2023-11-19 07:36:49,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 80.16666666666667) internal successors, (481), 6 states have internal predecessors, (481), 0 states have call successors, (0), 0 states 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 07:36:49,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:49,361 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:49,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:49,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:49,576 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 07:36:49,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:49,577 INFO L85 PathProgramCache]: Analyzing trace with hash -674090291, now seen corresponding path program 2 times [2023-11-19 07:36:49,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:49,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999150285] [2023-11-19 07:36:49,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:49,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:49,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:49,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:49,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:49,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999150285] [2023-11-19 07:36:49,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999150285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:49,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924511558] [2023-11-19 07:36:49,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:36:49,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:49,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:49,768 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:49,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:36:49,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:36:49,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:36:49,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:36:49,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:49,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:50,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:50,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924511558] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:50,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:36:50,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-11-19 07:36:50,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393425816] [2023-11-19 07:36:50,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:50,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:36:50,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:50,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:36:50,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:36:50,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 161 [2023-11-19 07:36:50,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 317 flow. Second operand has 14 states, 14 states have (on average 69.21428571428571) internal successors, (969), 14 states have internal predecessors, (969), 0 states have call successors, (0), 0 states 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 07:36:50,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:50,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 161 [2023-11-19 07:36:50,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:50,774 INFO L124 PetriNetUnfolderBase]: 260/444 cut-off events. [2023-11-19 07:36:50,775 INFO L125 PetriNetUnfolderBase]: For 1566/1566 co-relation queries the response was YES. [2023-11-19 07:36:50,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2195 conditions, 444 events. 260/444 cut-off events. For 1566/1566 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1674 event pairs, 24 based on Foata normal form. 14/458 useless extension candidates. Maximal degree in co-relation 1423. Up to 183 conditions per place. [2023-11-19 07:36:50,781 INFO L140 encePairwiseOnDemand]: 155/161 looper letters, 55 selfloop transitions, 61 changer transitions 11/127 dead transitions. [2023-11-19 07:36:50,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 127 transitions, 1236 flow [2023-11-19 07:36:50,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:36:50,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-19 07:36:50,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1367 transitions. [2023-11-19 07:36:50,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44687806472703495 [2023-11-19 07:36:50,788 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1367 transitions. [2023-11-19 07:36:50,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1367 transitions. [2023-11-19 07:36:50,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:50,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1367 transitions. [2023-11-19 07:36:50,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 71.94736842105263) internal successors, (1367), 19 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states 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 07:36:50,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 161.0) internal successors, (3220), 20 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states 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 07:36:50,802 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 161.0) internal successors, (3220), 20 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states 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 07:36:50,802 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 317 flow. Second operand 19 states and 1367 transitions. [2023-11-19 07:36:50,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 127 transitions, 1236 flow [2023-11-19 07:36:50,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 127 transitions, 1200 flow, removed 18 selfloop flow, removed 0 redundant places. [2023-11-19 07:36:50,813 INFO L231 Difference]: Finished difference. Result has 67 places, 82 transitions, 925 flow [2023-11-19 07:36:50,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=925, PETRI_PLACES=67, PETRI_TRANSITIONS=82} [2023-11-19 07:36:50,814 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 47 predicate places. [2023-11-19 07:36:50,815 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 82 transitions, 925 flow [2023-11-19 07:36:50,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 69.21428571428571) internal successors, (969), 14 states have internal predecessors, (969), 0 states have call successors, (0), 0 states 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 07:36:50,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:50,816 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:50,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:51,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:51,038 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 07:36:51,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:51,039 INFO L85 PathProgramCache]: Analyzing trace with hash -989594653, now seen corresponding path program 3 times [2023-11-19 07:36:51,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:51,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947526586] [2023-11-19 07:36:51,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:51,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:51,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:51,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:51,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947526586] [2023-11-19 07:36:51,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947526586] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:51,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302531691] [2023-11-19 07:36:51,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:36:51,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:51,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:51,236 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:51,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:36:51,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:36:51,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:36:51,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:36:51,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:51,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:51,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:51,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302531691] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:51,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:36:51,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-11-19 07:36:51,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607784811] [2023-11-19 07:36:51,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:51,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:36:51,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:51,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:36:51,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:36:51,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 161 [2023-11-19 07:36:51,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 82 transitions, 925 flow. Second operand has 12 states, 12 states have (on average 69.5) internal successors, (834), 12 states have internal predecessors, (834), 0 states have call successors, (0), 0 states 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 07:36:51,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:51,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 161 [2023-11-19 07:36:51,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:52,039 INFO L124 PetriNetUnfolderBase]: 256/432 cut-off events. [2023-11-19 07:36:52,040 INFO L125 PetriNetUnfolderBase]: For 2438/2438 co-relation queries the response was YES. [2023-11-19 07:36:52,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2619 conditions, 432 events. 256/432 cut-off events. For 2438/2438 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1542 event pairs, 11 based on Foata normal form. 10/442 useless extension candidates. Maximal degree in co-relation 1809. Up to 175 conditions per place. [2023-11-19 07:36:52,047 INFO L140 encePairwiseOnDemand]: 155/161 looper letters, 79 selfloop transitions, 50 changer transitions 1/130 dead transitions. [2023-11-19 07:36:52,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 130 transitions, 1542 flow [2023-11-19 07:36:52,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:36:52,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-19 07:36:52,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 943 transitions. [2023-11-19 07:36:52,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2023-11-19 07:36:52,052 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 943 transitions. [2023-11-19 07:36:52,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 943 transitions. [2023-11-19 07:36:52,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:52,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 943 transitions. [2023-11-19 07:36:52,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 72.53846153846153) internal successors, (943), 13 states have internal predecessors, (943), 0 states have call successors, (0), 0 states 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 07:36:52,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 161.0) internal successors, (2254), 14 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states 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 07:36:52,062 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 161.0) internal successors, (2254), 14 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states 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 07:36:52,062 INFO L175 Difference]: Start difference. First operand has 67 places, 82 transitions, 925 flow. Second operand 13 states and 943 transitions. [2023-11-19 07:36:52,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 130 transitions, 1542 flow [2023-11-19 07:36:52,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 130 transitions, 1216 flow, removed 157 selfloop flow, removed 3 redundant places. [2023-11-19 07:36:52,086 INFO L231 Difference]: Finished difference. Result has 80 places, 93 transitions, 902 flow [2023-11-19 07:36:52,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=902, PETRI_PLACES=80, PETRI_TRANSITIONS=93} [2023-11-19 07:36:52,087 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 60 predicate places. [2023-11-19 07:36:52,087 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 93 transitions, 902 flow [2023-11-19 07:36:52,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 69.5) internal successors, (834), 12 states have internal predecessors, (834), 0 states have call successors, (0), 0 states 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 07:36:52,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:52,088 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:52,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:52,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:36:52,309 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 07:36:52,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:52,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1876041565, now seen corresponding path program 4 times [2023-11-19 07:36:52,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:52,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67439955] [2023-11-19 07:36:52,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:52,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:52,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:52,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67439955] [2023-11-19 07:36:52,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67439955] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:52,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292019814] [2023-11-19 07:36:52,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:36:52,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:52,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:52,550 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:52,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:36:52,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:36:52,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:36:52,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:36:52,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:52,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:52,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:52,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292019814] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:52,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:36:52,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-11-19 07:36:52,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417491128] [2023-11-19 07:36:52,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:52,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:36:52,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:52,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:36:52,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:36:52,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 161 [2023-11-19 07:36:52,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 93 transitions, 902 flow. Second operand has 15 states, 15 states have (on average 69.26666666666667) internal successors, (1039), 15 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states 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 07:36:52,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:52,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 161 [2023-11-19 07:36:52,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:53,718 INFO L124 PetriNetUnfolderBase]: 268/462 cut-off events. [2023-11-19 07:36:53,718 INFO L125 PetriNetUnfolderBase]: For 3516/3516 co-relation queries the response was YES. [2023-11-19 07:36:53,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2512 conditions, 462 events. 268/462 cut-off events. For 3516/3516 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1756 event pairs, 17 based on Foata normal form. 24/486 useless extension candidates. Maximal degree in co-relation 2296. Up to 164 conditions per place. [2023-11-19 07:36:53,724 INFO L140 encePairwiseOnDemand]: 155/161 looper letters, 67 selfloop transitions, 74 changer transitions 4/145 dead transitions. [2023-11-19 07:36:53,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 145 transitions, 1500 flow [2023-11-19 07:36:53,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-19 07:36:53,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-19 07:36:53,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1652 transitions. [2023-11-19 07:36:53,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44612476370510395 [2023-11-19 07:36:53,732 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1652 transitions. [2023-11-19 07:36:53,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1652 transitions. [2023-11-19 07:36:53,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:53,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1652 transitions. [2023-11-19 07:36:53,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 71.82608695652173) internal successors, (1652), 23 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states 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 07:36:53,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 161.0) internal successors, (3864), 24 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states 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 07:36:53,749 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 161.0) internal successors, (3864), 24 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states 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 07:36:53,749 INFO L175 Difference]: Start difference. First operand has 80 places, 93 transitions, 902 flow. Second operand 23 states and 1652 transitions. [2023-11-19 07:36:53,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 145 transitions, 1500 flow [2023-11-19 07:36:53,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 145 transitions, 1437 flow, removed 24 selfloop flow, removed 3 redundant places. [2023-11-19 07:36:53,771 INFO L231 Difference]: Finished difference. Result has 101 places, 95 transitions, 1058 flow [2023-11-19 07:36:53,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1058, PETRI_PLACES=101, PETRI_TRANSITIONS=95} [2023-11-19 07:36:53,773 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 81 predicate places. [2023-11-19 07:36:53,773 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 95 transitions, 1058 flow [2023-11-19 07:36:53,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 69.26666666666667) internal successors, (1039), 15 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states 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 07:36:53,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:53,774 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:53,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:53,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:53,992 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 07:36:53,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:53,993 INFO L85 PathProgramCache]: Analyzing trace with hash 378000465, now seen corresponding path program 5 times [2023-11-19 07:36:53,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:53,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439930174] [2023-11-19 07:36:53,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:53,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:54,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:54,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:54,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439930174] [2023-11-19 07:36:54,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439930174] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:54,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653033141] [2023-11-19 07:36:54,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:36:54,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:54,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:54,138 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:54,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:36:54,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:36:54,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:36:54,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:36:54,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:54,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:54,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:54,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653033141] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:54,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:36:54,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-11-19 07:36:54,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521461135] [2023-11-19 07:36:54,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:54,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:36:54,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:54,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:36:54,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:36:54,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 161 [2023-11-19 07:36:54,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 95 transitions, 1058 flow. Second operand has 14 states, 14 states have (on average 69.5) internal successors, (973), 14 states have internal predecessors, (973), 0 states have call successors, (0), 0 states 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 07:36:54,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:54,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 161 [2023-11-19 07:36:54,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:55,146 INFO L124 PetriNetUnfolderBase]: 328/568 cut-off events. [2023-11-19 07:36:55,146 INFO L125 PetriNetUnfolderBase]: For 4945/4945 co-relation queries the response was YES. [2023-11-19 07:36:55,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3336 conditions, 568 events. 328/568 cut-off events. For 4945/4945 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2296 event pairs, 27 based on Foata normal form. 14/582 useless extension candidates. Maximal degree in co-relation 3114. Up to 216 conditions per place. [2023-11-19 07:36:55,155 INFO L140 encePairwiseOnDemand]: 155/161 looper letters, 92 selfloop transitions, 79 changer transitions 1/172 dead transitions. [2023-11-19 07:36:55,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 172 transitions, 1998 flow [2023-11-19 07:36:55,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-19 07:36:55,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-19 07:36:55,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1441 transitions. [2023-11-19 07:36:55,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4475155279503106 [2023-11-19 07:36:55,165 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1441 transitions. [2023-11-19 07:36:55,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1441 transitions. [2023-11-19 07:36:55,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:55,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1441 transitions. [2023-11-19 07:36:55,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 72.05) internal successors, (1441), 20 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states 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 07:36:55,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 161.0) internal successors, (3381), 21 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states 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 07:36:55,184 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 161.0) internal successors, (3381), 21 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states 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 07:36:55,184 INFO L175 Difference]: Start difference. First operand has 101 places, 95 transitions, 1058 flow. Second operand 20 states and 1441 transitions. [2023-11-19 07:36:55,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 172 transitions, 1998 flow [2023-11-19 07:36:55,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 172 transitions, 1710 flow, removed 48 selfloop flow, removed 17 redundant places. [2023-11-19 07:36:55,218 INFO L231 Difference]: Finished difference. Result has 109 places, 125 transitions, 1332 flow [2023-11-19 07:36:55,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1332, PETRI_PLACES=109, PETRI_TRANSITIONS=125} [2023-11-19 07:36:55,219 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 89 predicate places. [2023-11-19 07:36:55,219 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 125 transitions, 1332 flow [2023-11-19 07:36:55,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 69.5) internal successors, (973), 14 states have internal predecessors, (973), 0 states have call successors, (0), 0 states 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 07:36:55,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:55,220 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:55,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:55,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:55,436 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 07:36:55,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:55,436 INFO L85 PathProgramCache]: Analyzing trace with hash 330307945, now seen corresponding path program 6 times [2023-11-19 07:36:55,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:55,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279980039] [2023-11-19 07:36:55,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:55,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:55,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:55,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:55,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279980039] [2023-11-19 07:36:55,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279980039] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:55,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117419063] [2023-11-19 07:36:55,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:36:55,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:55,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:55,578 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:55,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:36:55,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-19 07:36:55,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:36:55,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:36:55,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:55,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:55,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:55,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117419063] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:55,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:36:55,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-11-19 07:36:55,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921590078] [2023-11-19 07:36:55,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:55,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:36:55,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:55,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:36:55,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:36:55,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 161 [2023-11-19 07:36:55,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 125 transitions, 1332 flow. Second operand has 15 states, 15 states have (on average 69.4) internal successors, (1041), 15 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states 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 07:36:55,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:55,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 161 [2023-11-19 07:36:55,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:56,757 INFO L124 PetriNetUnfolderBase]: 509/871 cut-off events. [2023-11-19 07:36:56,757 INFO L125 PetriNetUnfolderBase]: For 10428/10428 co-relation queries the response was YES. [2023-11-19 07:36:56,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5197 conditions, 871 events. 509/871 cut-off events. For 10428/10428 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3906 event pairs, 70 based on Foata normal form. 36/907 useless extension candidates. Maximal degree in co-relation 4886. Up to 505 conditions per place. [2023-11-19 07:36:56,770 INFO L140 encePairwiseOnDemand]: 155/161 looper letters, 152 selfloop transitions, 113 changer transitions 3/268 dead transitions. [2023-11-19 07:36:56,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 268 transitions, 3210 flow [2023-11-19 07:36:56,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 07:36:56,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-19 07:36:56,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1730 transitions. [2023-11-19 07:36:56,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4477225672877847 [2023-11-19 07:36:56,777 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1730 transitions. [2023-11-19 07:36:56,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1730 transitions. [2023-11-19 07:36:56,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:56,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1730 transitions. [2023-11-19 07:36:56,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 72.08333333333333) internal successors, (1730), 24 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states 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 07:36:56,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 161.0) internal successors, (4025), 25 states have internal predecessors, (4025), 0 states have call successors, (0), 0 states 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 07:36:56,797 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 161.0) internal successors, (4025), 25 states have internal predecessors, (4025), 0 states have call successors, (0), 0 states 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 07:36:56,798 INFO L175 Difference]: Start difference. First operand has 109 places, 125 transitions, 1332 flow. Second operand 24 states and 1730 transitions. [2023-11-19 07:36:56,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 268 transitions, 3210 flow [2023-11-19 07:36:56,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 268 transitions, 2972 flow, removed 62 selfloop flow, removed 9 redundant places. [2023-11-19 07:36:56,853 INFO L231 Difference]: Finished difference. Result has 133 places, 193 transitions, 2475 flow [2023-11-19 07:36:56,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2475, PETRI_PLACES=133, PETRI_TRANSITIONS=193} [2023-11-19 07:36:56,855 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 113 predicate places. [2023-11-19 07:36:56,855 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 193 transitions, 2475 flow [2023-11-19 07:36:56,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 69.4) internal successors, (1041), 15 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states 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 07:36:56,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:56,857 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:56,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:57,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 07:36:57,078 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 07:36:57,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:57,078 INFO L85 PathProgramCache]: Analyzing trace with hash -2078821967, now seen corresponding path program 7 times [2023-11-19 07:36:57,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:57,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960209293] [2023-11-19 07:36:57,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:57,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:57,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:57,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:57,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960209293] [2023-11-19 07:36:57,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960209293] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:57,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728209005] [2023-11-19 07:36:57,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:36:57,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:57,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:57,279 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:57,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:36:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:57,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:36:57,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:57,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:57,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:57,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:57,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728209005] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:57,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:36:57,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-11-19 07:36:57,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701324568] [2023-11-19 07:36:57,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:57,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:36:57,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:57,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:36:57,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:36:57,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 161 [2023-11-19 07:36:57,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 193 transitions, 2475 flow. Second operand has 14 states, 14 states have (on average 68.85714285714286) internal successors, (964), 14 states have internal predecessors, (964), 0 states have call successors, (0), 0 states 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 07:36:57,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:57,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 161 [2023-11-19 07:36:57,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:58,257 INFO L124 PetriNetUnfolderBase]: 549/935 cut-off events. [2023-11-19 07:36:58,257 INFO L125 PetriNetUnfolderBase]: For 9882/9882 co-relation queries the response was YES. [2023-11-19 07:36:58,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6215 conditions, 935 events. 549/935 cut-off events. For 9882/9882 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4266 event pairs, 83 based on Foata normal form. 12/947 useless extension candidates. Maximal degree in co-relation 5958. Up to 584 conditions per place. [2023-11-19 07:36:58,272 INFO L140 encePairwiseOnDemand]: 155/161 looper letters, 104 selfloop transitions, 128 changer transitions 5/237 dead transitions. [2023-11-19 07:36:58,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 237 transitions, 3515 flow [2023-11-19 07:36:58,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:36:58,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 07:36:58,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1001 transitions. [2023-11-19 07:36:58,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4440993788819876 [2023-11-19 07:36:58,276 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1001 transitions. [2023-11-19 07:36:58,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1001 transitions. [2023-11-19 07:36:58,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:58,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1001 transitions. [2023-11-19 07:36:58,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 71.5) internal successors, (1001), 14 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states 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 07:36:58,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 161.0) internal successors, (2415), 15 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states 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 07:36:58,285 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 161.0) internal successors, (2415), 15 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states 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 07:36:58,285 INFO L175 Difference]: Start difference. First operand has 133 places, 193 transitions, 2475 flow. Second operand 14 states and 1001 transitions. [2023-11-19 07:36:58,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 237 transitions, 3515 flow [2023-11-19 07:36:58,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 237 transitions, 2897 flow, removed 282 selfloop flow, removed 8 redundant places. [2023-11-19 07:36:58,372 INFO L231 Difference]: Finished difference. Result has 141 places, 215 transitions, 2735 flow [2023-11-19 07:36:58,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=1948, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2735, PETRI_PLACES=141, PETRI_TRANSITIONS=215} [2023-11-19 07:36:58,374 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 121 predicate places. [2023-11-19 07:36:58,374 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 215 transitions, 2735 flow [2023-11-19 07:36:58,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 68.85714285714286) internal successors, (964), 14 states have internal predecessors, (964), 0 states have call successors, (0), 0 states 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 07:36:58,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:58,375 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:58,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:58,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 07:36:58,588 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 07:36:58,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:58,588 INFO L85 PathProgramCache]: Analyzing trace with hash 419798427, now seen corresponding path program 8 times [2023-11-19 07:36:58,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:58,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790954784] [2023-11-19 07:36:58,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:58,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:58,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:58,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:58,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790954784] [2023-11-19 07:36:58,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790954784] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:58,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917101238] [2023-11-19 07:36:58,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:36:58,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:58,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:58,786 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:58,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:36:58,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:36:58,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:36:58,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:36:58,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:58,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:58,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:59,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:59,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917101238] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:59,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:36:59,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-11-19 07:36:59,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309510661] [2023-11-19 07:36:59,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:59,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:36:59,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:59,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:36:59,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:36:59,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 161 [2023-11-19 07:36:59,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 215 transitions, 2735 flow. Second operand has 15 states, 15 states have (on average 69.2) internal successors, (1038), 15 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states 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 07:36:59,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:59,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 161 [2023-11-19 07:36:59,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:59,749 INFO L124 PetriNetUnfolderBase]: 535/935 cut-off events. [2023-11-19 07:36:59,749 INFO L125 PetriNetUnfolderBase]: For 7761/7761 co-relation queries the response was YES. [2023-11-19 07:36:59,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6040 conditions, 935 events. 535/935 cut-off events. For 7761/7761 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4368 event pairs, 65 based on Foata normal form. 24/959 useless extension candidates. Maximal degree in co-relation 5891. Up to 488 conditions per place. [2023-11-19 07:36:59,809 INFO L140 encePairwiseOnDemand]: 155/161 looper letters, 99 selfloop transitions, 142 changer transitions 1/242 dead transitions. [2023-11-19 07:36:59,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 242 transitions, 3328 flow [2023-11-19 07:36:59,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 07:36:59,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-19 07:36:59,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1147 transitions. [2023-11-19 07:36:59,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452639751552795 [2023-11-19 07:36:59,813 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1147 transitions. [2023-11-19 07:36:59,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1147 transitions. [2023-11-19 07:36:59,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:59,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1147 transitions. [2023-11-19 07:36:59,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 71.6875) internal successors, (1147), 16 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states 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 07:36:59,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 161.0) internal successors, (2737), 17 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states 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 07:36:59,831 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 161.0) internal successors, (2737), 17 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states 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 07:36:59,839 INFO L175 Difference]: Start difference. First operand has 141 places, 215 transitions, 2735 flow. Second operand 16 states and 1147 transitions. [2023-11-19 07:36:59,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 242 transitions, 3328 flow [2023-11-19 07:36:59,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 242 transitions, 3108 flow, removed 75 selfloop flow, removed 5 redundant places. [2023-11-19 07:36:59,918 INFO L231 Difference]: Finished difference. Result has 152 places, 214 transitions, 2847 flow [2023-11-19 07:36:59,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=2443, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2847, PETRI_PLACES=152, PETRI_TRANSITIONS=214} [2023-11-19 07:36:59,920 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 132 predicate places. [2023-11-19 07:36:59,920 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 214 transitions, 2847 flow [2023-11-19 07:36:59,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 69.2) internal successors, (1038), 15 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states 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 07:36:59,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:59,921 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:59,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:00,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 07:37:00,142 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 07:37:00,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:00,143 INFO L85 PathProgramCache]: Analyzing trace with hash -876067036, now seen corresponding path program 9 times [2023-11-19 07:37:00,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:00,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44331511] [2023-11-19 07:37:00,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:00,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:00,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:00,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:00,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44331511] [2023-11-19 07:37:00,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44331511] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:00,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534999179] [2023-11-19 07:37:00,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:37:00,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:00,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:00,333 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:00,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:37:00,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 07:37:00,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:37:00,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:37:00,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:00,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:37:00,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:00,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:37:00,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534999179] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:00,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:00,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2023-11-19 07:37:00,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116062892] [2023-11-19 07:37:00,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:00,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:37:00,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:00,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:37:00,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:37:00,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 161 [2023-11-19 07:37:00,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 214 transitions, 2847 flow. Second operand has 8 states, 8 states have (on average 79.375) internal successors, (635), 8 states have internal predecessors, (635), 0 states have call successors, (0), 0 states 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 07:37:00,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:00,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 161 [2023-11-19 07:37:00,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:01,036 INFO L124 PetriNetUnfolderBase]: 708/1257 cut-off events. [2023-11-19 07:37:01,036 INFO L125 PetriNetUnfolderBase]: For 12052/12052 co-relation queries the response was YES. [2023-11-19 07:37:01,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8551 conditions, 1257 events. 708/1257 cut-off events. For 12052/12052 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 6501 event pairs, 42 based on Foata normal form. 11/1266 useless extension candidates. Maximal degree in co-relation 8238. Up to 675 conditions per place. [2023-11-19 07:37:01,060 INFO L140 encePairwiseOnDemand]: 157/161 looper letters, 183 selfloop transitions, 89 changer transitions 41/313 dead transitions. [2023-11-19 07:37:01,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 313 transitions, 4721 flow [2023-11-19 07:37:01,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:37:01,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:37:01,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 426 transitions. [2023-11-19 07:37:01,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.529192546583851 [2023-11-19 07:37:01,062 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 426 transitions. [2023-11-19 07:37:01,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 426 transitions. [2023-11-19 07:37:01,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:01,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 426 transitions. [2023-11-19 07:37:01,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 85.2) internal successors, (426), 5 states have internal predecessors, (426), 0 states have call successors, (0), 0 states 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 07:37:01,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:01,067 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:01,067 INFO L175 Difference]: Start difference. First operand has 152 places, 214 transitions, 2847 flow. Second operand 5 states and 426 transitions. [2023-11-19 07:37:01,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 313 transitions, 4721 flow [2023-11-19 07:37:01,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 313 transitions, 4260 flow, removed 54 selfloop flow, removed 14 redundant places. [2023-11-19 07:37:01,169 INFO L231 Difference]: Finished difference. Result has 145 places, 235 transitions, 3208 flow [2023-11-19 07:37:01,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=2504, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3208, PETRI_PLACES=145, PETRI_TRANSITIONS=235} [2023-11-19 07:37:01,170 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 125 predicate places. [2023-11-19 07:37:01,171 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 235 transitions, 3208 flow [2023-11-19 07:37:01,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 79.375) internal successors, (635), 8 states have internal predecessors, (635), 0 states have call successors, (0), 0 states 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 07:37:01,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:01,171 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:01,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:01,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-19 07:37:01,393 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 07:37:01,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:01,393 INFO L85 PathProgramCache]: Analyzing trace with hash 608334820, now seen corresponding path program 10 times [2023-11-19 07:37:01,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:01,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424433091] [2023-11-19 07:37:01,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:01,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:01,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:01,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424433091] [2023-11-19 07:37:01,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424433091] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:01,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049944797] [2023-11-19 07:37:01,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:37:01,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:01,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:01,661 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:01,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 07:37:01,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:37:01,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:37:01,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:37:01,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:01,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:01,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049944797] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:01,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:01,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-19 07:37:01,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243159106] [2023-11-19 07:37:01,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:01,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:37:01,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:01,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:37:01,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:37:02,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 161 [2023-11-19 07:37:02,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 235 transitions, 3208 flow. Second operand has 15 states, 15 states have (on average 69.13333333333334) internal successors, (1037), 15 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states 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 07:37:02,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:02,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 161 [2023-11-19 07:37:02,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:03,325 INFO L124 PetriNetUnfolderBase]: 1195/1986 cut-off events. [2023-11-19 07:37:03,325 INFO L125 PetriNetUnfolderBase]: For 17502/17502 co-relation queries the response was YES. [2023-11-19 07:37:03,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13995 conditions, 1986 events. 1195/1986 cut-off events. For 17502/17502 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 10427 event pairs, 13 based on Foata normal form. 16/2002 useless extension candidates. Maximal degree in co-relation 13707. Up to 766 conditions per place. [2023-11-19 07:37:03,360 INFO L140 encePairwiseOnDemand]: 155/161 looper letters, 275 selfloop transitions, 226 changer transitions 6/507 dead transitions. [2023-11-19 07:37:03,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 507 transitions, 7764 flow [2023-11-19 07:37:03,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 07:37:03,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-19 07:37:03,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1518 transitions. [2023-11-19 07:37:03,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2023-11-19 07:37:03,365 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1518 transitions. [2023-11-19 07:37:03,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1518 transitions. [2023-11-19 07:37:03,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:03,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1518 transitions. [2023-11-19 07:37:03,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 72.28571428571429) internal successors, (1518), 21 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states 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 07:37:03,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 161.0) internal successors, (3542), 22 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states 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 07:37:03,376 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 161.0) internal successors, (3542), 22 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states 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 07:37:03,376 INFO L175 Difference]: Start difference. First operand has 145 places, 235 transitions, 3208 flow. Second operand 21 states and 1518 transitions. [2023-11-19 07:37:03,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 507 transitions, 7764 flow [2023-11-19 07:37:03,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 507 transitions, 7641 flow, removed 58 selfloop flow, removed 2 redundant places. [2023-11-19 07:37:03,542 INFO L231 Difference]: Finished difference. Result has 174 places, 393 transitions, 6136 flow [2023-11-19 07:37:03,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=3149, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6136, PETRI_PLACES=174, PETRI_TRANSITIONS=393} [2023-11-19 07:37:03,543 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 154 predicate places. [2023-11-19 07:37:03,543 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 393 transitions, 6136 flow [2023-11-19 07:37:03,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 69.13333333333334) internal successors, (1037), 15 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states 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 07:37:03,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:03,544 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:03,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:03,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 07:37:03,754 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:37:03,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:03,754 INFO L85 PathProgramCache]: Analyzing trace with hash -94802592, now seen corresponding path program 11 times [2023-11-19 07:37:03,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:03,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455434392] [2023-11-19 07:37:03,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:03,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:03,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:03,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:03,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455434392] [2023-11-19 07:37:03,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455434392] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:03,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766185045] [2023-11-19 07:37:03,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:37:03,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:03,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:03,999 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:04,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 07:37:04,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:37:04,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:37:04,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:37:04,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:04,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:04,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:04,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766185045] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:04,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:04,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-11-19 07:37:04,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402557916] [2023-11-19 07:37:04,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:04,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:37:04,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:04,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:37:04,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:37:04,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 161 [2023-11-19 07:37:04,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 393 transitions, 6136 flow. Second operand has 18 states, 18 states have (on average 68.72222222222223) internal successors, (1237), 18 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:04,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:04,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 161 [2023-11-19 07:37:04,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:06,369 INFO L124 PetriNetUnfolderBase]: 1285/2140 cut-off events. [2023-11-19 07:37:06,369 INFO L125 PetriNetUnfolderBase]: For 28570/28570 co-relation queries the response was YES. [2023-11-19 07:37:06,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17151 conditions, 2140 events. 1285/2140 cut-off events. For 28570/28570 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 11505 event pairs, 74 based on Foata normal form. 26/2166 useless extension candidates. Maximal degree in co-relation 16895. Up to 796 conditions per place. [2023-11-19 07:37:06,407 INFO L140 encePairwiseOnDemand]: 155/161 looper letters, 275 selfloop transitions, 234 changer transitions 1/510 dead transitions. [2023-11-19 07:37:06,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 510 transitions, 8586 flow [2023-11-19 07:37:06,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-19 07:37:06,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-19 07:37:06,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1866 transitions. [2023-11-19 07:37:06,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44577161968466317 [2023-11-19 07:37:06,412 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1866 transitions. [2023-11-19 07:37:06,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1866 transitions. [2023-11-19 07:37:06,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:06,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1866 transitions. [2023-11-19 07:37:06,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 71.76923076923077) internal successors, (1866), 26 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states 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 07:37:06,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 161.0) internal successors, (4347), 27 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states 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 07:37:06,424 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 161.0) internal successors, (4347), 27 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states 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 07:37:06,424 INFO L175 Difference]: Start difference. First operand has 174 places, 393 transitions, 6136 flow. Second operand 26 states and 1866 transitions. [2023-11-19 07:37:06,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 510 transitions, 8586 flow [2023-11-19 07:37:06,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 510 transitions, 8113 flow, removed 216 selfloop flow, removed 4 redundant places. [2023-11-19 07:37:06,708 INFO L231 Difference]: Finished difference. Result has 204 places, 432 transitions, 7220 flow [2023-11-19 07:37:06,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=5793, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7220, PETRI_PLACES=204, PETRI_TRANSITIONS=432} [2023-11-19 07:37:06,709 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 184 predicate places. [2023-11-19 07:37:06,709 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 432 transitions, 7220 flow [2023-11-19 07:37:06,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 68.72222222222223) internal successors, (1237), 18 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:06,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:06,710 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:06,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:06,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-19 07:37:06,910 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:37:06,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:06,911 INFO L85 PathProgramCache]: Analyzing trace with hash -2084944874, now seen corresponding path program 12 times [2023-11-19 07:37:06,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:06,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106967762] [2023-11-19 07:37:06,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:06,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:07,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:07,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:07,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106967762] [2023-11-19 07:37:07,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106967762] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:07,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114895022] [2023-11-19 07:37:07,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:37:07,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:07,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:07,228 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:07,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-19 07:37:07,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-19 07:37:07,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:37:07,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:37:07,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:07,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:07,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:07,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114895022] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:07,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:07,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2023-11-19 07:37:07,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432099187] [2023-11-19 07:37:07,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:07,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 07:37:07,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:07,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 07:37:07,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:37:07,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 161 [2023-11-19 07:37:07,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 432 transitions, 7220 flow. Second operand has 22 states, 22 states have (on average 68.54545454545455) internal successors, (1508), 22 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:07,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:07,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 161 [2023-11-19 07:37:07,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:09,953 INFO L124 PetriNetUnfolderBase]: 1514/2471 cut-off events. [2023-11-19 07:37:09,953 INFO L125 PetriNetUnfolderBase]: For 45793/45793 co-relation queries the response was YES. [2023-11-19 07:37:09,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21532 conditions, 2471 events. 1514/2471 cut-off events. For 45793/45793 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 13329 event pairs, 114 based on Foata normal form. 26/2497 useless extension candidates. Maximal degree in co-relation 21291. Up to 1060 conditions per place. [2023-11-19 07:37:09,995 INFO L140 encePairwiseOnDemand]: 155/161 looper letters, 200 selfloop transitions, 450 changer transitions 20/670 dead transitions. [2023-11-19 07:37:09,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 670 transitions, 12737 flow [2023-11-19 07:37:09,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-19 07:37:09,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-19 07:37:09,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2786 transitions. [2023-11-19 07:37:10,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.443701226309922 [2023-11-19 07:37:10,002 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2786 transitions. [2023-11-19 07:37:10,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2786 transitions. [2023-11-19 07:37:10,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:10,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2786 transitions. [2023-11-19 07:37:10,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 71.43589743589743) internal successors, (2786), 39 states have internal predecessors, (2786), 0 states have call successors, (0), 0 states 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 07:37:10,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 161.0) internal successors, (6440), 40 states have internal predecessors, (6440), 0 states have call successors, (0), 0 states 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 07:37:10,020 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 161.0) internal successors, (6440), 40 states have internal predecessors, (6440), 0 states have call successors, (0), 0 states 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 07:37:10,020 INFO L175 Difference]: Start difference. First operand has 204 places, 432 transitions, 7220 flow. Second operand 39 states and 2786 transitions. [2023-11-19 07:37:10,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 670 transitions, 12737 flow [2023-11-19 07:37:10,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 670 transitions, 12090 flow, removed 233 selfloop flow, removed 12 redundant places. [2023-11-19 07:37:10,406 INFO L231 Difference]: Finished difference. Result has 237 places, 575 transitions, 11151 flow [2023-11-19 07:37:10,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=6809, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=11151, PETRI_PLACES=237, PETRI_TRANSITIONS=575} [2023-11-19 07:37:10,406 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 217 predicate places. [2023-11-19 07:37:10,407 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 575 transitions, 11151 flow [2023-11-19 07:37:10,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 68.54545454545455) internal successors, (1508), 22 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:10,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:10,407 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:10,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:10,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:10,612 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:37:10,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:10,613 INFO L85 PathProgramCache]: Analyzing trace with hash 132432330, now seen corresponding path program 13 times [2023-11-19 07:37:10,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:10,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844257274] [2023-11-19 07:37:10,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:10,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:10,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:10,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:10,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844257274] [2023-11-19 07:37:10,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844257274] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:10,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452013950] [2023-11-19 07:37:10,823 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:37:10,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:10,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:10,825 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:10,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-19 07:37:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:10,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:37:10,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:10,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:11,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:11,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452013950] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:11,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:11,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-11-19 07:37:11,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429946260] [2023-11-19 07:37:11,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:11,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:37:11,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:11,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:37:11,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:37:11,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 161 [2023-11-19 07:37:11,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 575 transitions, 11151 flow. Second operand has 17 states, 17 states have (on average 68.88235294117646) internal successors, (1171), 17 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states 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 07:37:11,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:11,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 161 [2023-11-19 07:37:11,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:13,702 INFO L124 PetriNetUnfolderBase]: 1654/2719 cut-off events. [2023-11-19 07:37:13,702 INFO L125 PetriNetUnfolderBase]: For 51360/51360 co-relation queries the response was YES. [2023-11-19 07:37:13,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24731 conditions, 2719 events. 1654/2719 cut-off events. For 51360/51360 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 15137 event pairs, 74 based on Foata normal form. 42/2761 useless extension candidates. Maximal degree in co-relation 24429. Up to 788 conditions per place. [2023-11-19 07:37:13,745 INFO L140 encePairwiseOnDemand]: 155/161 looper letters, 312 selfloop transitions, 420 changer transitions 13/745 dead transitions. [2023-11-19 07:37:13,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 745 transitions, 14786 flow [2023-11-19 07:37:13,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-19 07:37:13,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-19 07:37:13,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2936 transitions. [2023-11-19 07:37:13,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44478109377367064 [2023-11-19 07:37:13,751 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2936 transitions. [2023-11-19 07:37:13,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2936 transitions. [2023-11-19 07:37:13,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:13,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2936 transitions. [2023-11-19 07:37:13,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 71.60975609756098) internal successors, (2936), 41 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states 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 07:37:13,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 161.0) internal successors, (6762), 42 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states 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 07:37:13,771 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 161.0) internal successors, (6762), 42 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states 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 07:37:13,771 INFO L175 Difference]: Start difference. First operand has 237 places, 575 transitions, 11151 flow. Second operand 41 states and 2936 transitions. [2023-11-19 07:37:13,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 745 transitions, 14786 flow [2023-11-19 07:37:14,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 745 transitions, 13314 flow, removed 666 selfloop flow, removed 12 redundant places. [2023-11-19 07:37:14,713 INFO L231 Difference]: Finished difference. Result has 275 places, 643 transitions, 12342 flow [2023-11-19 07:37:14,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=9797, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=12342, PETRI_PLACES=275, PETRI_TRANSITIONS=643} [2023-11-19 07:37:14,714 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 255 predicate places. [2023-11-19 07:37:14,714 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 643 transitions, 12342 flow [2023-11-19 07:37:14,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 68.88235294117646) internal successors, (1171), 17 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states 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 07:37:14,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:14,715 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:14,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:14,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:14,919 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:37:14,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:14,920 INFO L85 PathProgramCache]: Analyzing trace with hash 462541062, now seen corresponding path program 14 times [2023-11-19 07:37:14,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:14,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074939849] [2023-11-19 07:37:14,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:14,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:14,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:15,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:15,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:15,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074939849] [2023-11-19 07:37:15,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074939849] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:15,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178419086] [2023-11-19 07:37:15,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:37:15,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:15,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:15,261 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:15,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-19 07:37:15,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:37:15,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:37:15,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:37:15,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:15,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:15,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:15,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:15,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178419086] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:15,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:15,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2023-11-19 07:37:15,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448127242] [2023-11-19 07:37:15,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:15,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 07:37:15,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:15,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 07:37:15,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2023-11-19 07:37:15,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 161 [2023-11-19 07:37:15,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 643 transitions, 12342 flow. Second operand has 23 states, 23 states have (on average 68.47826086956522) internal successors, (1575), 23 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states 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 07:37:15,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:15,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 161 [2023-11-19 07:37:15,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:18,481 INFO L124 PetriNetUnfolderBase]: 1651/2740 cut-off events. [2023-11-19 07:37:18,481 INFO L125 PetriNetUnfolderBase]: For 44121/44121 co-relation queries the response was YES. [2023-11-19 07:37:18,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24673 conditions, 2740 events. 1651/2740 cut-off events. For 44121/44121 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 15509 event pairs, 79 based on Foata normal form. 48/2788 useless extension candidates. Maximal degree in co-relation 24397. Up to 889 conditions per place. [2023-11-19 07:37:18,597 INFO L140 encePairwiseOnDemand]: 155/161 looper letters, 189 selfloop transitions, 560 changer transitions 1/750 dead transitions. [2023-11-19 07:37:18,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 750 transitions, 14751 flow [2023-11-19 07:37:18,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-19 07:37:18,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-19 07:37:18,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3362 transitions. [2023-11-19 07:37:18,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4442976080348883 [2023-11-19 07:37:18,607 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3362 transitions. [2023-11-19 07:37:18,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3362 transitions. [2023-11-19 07:37:18,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:18,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3362 transitions. [2023-11-19 07:37:18,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 71.53191489361703) internal successors, (3362), 47 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states 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 07:37:18,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 161.0) internal successors, (7728), 48 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states 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 07:37:18,628 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 161.0) internal successors, (7728), 48 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states 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 07:37:18,628 INFO L175 Difference]: Start difference. First operand has 275 places, 643 transitions, 12342 flow. Second operand 47 states and 3362 transitions. [2023-11-19 07:37:18,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 750 transitions, 14751 flow [2023-11-19 07:37:19,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 750 transitions, 14309 flow, removed 170 selfloop flow, removed 14 redundant places. [2023-11-19 07:37:19,165 INFO L231 Difference]: Finished difference. Result has 309 places, 658 transitions, 13513 flow [2023-11-19 07:37:19,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=11833, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=540, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=13513, PETRI_PLACES=309, PETRI_TRANSITIONS=658} [2023-11-19 07:37:19,166 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 289 predicate places. [2023-11-19 07:37:19,166 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 658 transitions, 13513 flow [2023-11-19 07:37:19,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 68.47826086956522) internal successors, (1575), 23 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states 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 07:37:19,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:19,167 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:19,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:19,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-19 07:37:19,367 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:37:19,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:19,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1334371890, now seen corresponding path program 15 times [2023-11-19 07:37:19,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:19,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525819042] [2023-11-19 07:37:19,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:19,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:19,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:19,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:19,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525819042] [2023-11-19 07:37:19,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525819042] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:19,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836624882] [2023-11-19 07:37:19,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:37:19,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:19,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:19,552 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:19,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-19 07:37:19,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 07:37:19,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:37:19,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:37:19,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:19,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:19,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:19,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836624882] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:19,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:19,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-19 07:37:19,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278092427] [2023-11-19 07:37:19,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:19,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:37:19,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:19,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:37:19,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:37:20,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 161 [2023-11-19 07:37:20,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 658 transitions, 13513 flow. Second operand has 16 states, 16 states have (on average 68.9375) internal successors, (1103), 16 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states 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 07:37:20,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:20,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 161 [2023-11-19 07:37:20,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:22,617 INFO L124 PetriNetUnfolderBase]: 2010/3349 cut-off events. [2023-11-19 07:37:22,617 INFO L125 PetriNetUnfolderBase]: For 53936/53936 co-relation queries the response was YES. [2023-11-19 07:37:22,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31777 conditions, 3349 events. 2010/3349 cut-off events. For 53936/53936 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 19652 event pairs, 342 based on Foata normal form. 18/3367 useless extension candidates. Maximal degree in co-relation 31431. Up to 2292 conditions per place. [2023-11-19 07:37:22,668 INFO L140 encePairwiseOnDemand]: 155/161 looper letters, 637 selfloop transitions, 271 changer transitions 1/909 dead transitions. [2023-11-19 07:37:22,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 909 transitions, 19450 flow [2023-11-19 07:37:22,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-19 07:37:22,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-19 07:37:22,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2869 transitions. [2023-11-19 07:37:22,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4454968944099379 [2023-11-19 07:37:22,675 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2869 transitions. [2023-11-19 07:37:22,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2869 transitions. [2023-11-19 07:37:22,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:22,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2869 transitions. [2023-11-19 07:37:22,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 71.725) internal successors, (2869), 40 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states 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 07:37:22,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 161.0) internal successors, (6601), 41 states have internal predecessors, (6601), 0 states have call successors, (0), 0 states 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 07:37:22,691 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 161.0) internal successors, (6601), 41 states have internal predecessors, (6601), 0 states have call successors, (0), 0 states 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 07:37:22,691 INFO L175 Difference]: Start difference. First operand has 309 places, 658 transitions, 13513 flow. Second operand 40 states and 2869 transitions. [2023-11-19 07:37:22,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 909 transitions, 19450 flow [2023-11-19 07:37:23,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 909 transitions, 18348 flow, removed 158 selfloop flow, removed 36 redundant places. [2023-11-19 07:37:23,616 INFO L231 Difference]: Finished difference. Result has 326 places, 764 transitions, 15763 flow [2023-11-19 07:37:23,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=12600, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=15763, PETRI_PLACES=326, PETRI_TRANSITIONS=764} [2023-11-19 07:37:23,617 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 306 predicate places. [2023-11-19 07:37:23,617 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 764 transitions, 15763 flow [2023-11-19 07:37:23,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 68.9375) internal successors, (1103), 16 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states 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 07:37:23,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:23,618 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:23,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:23,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-19 07:37:23,819 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:37:23,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:23,819 INFO L85 PathProgramCache]: Analyzing trace with hash 317777694, now seen corresponding path program 16 times [2023-11-19 07:37:23,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:23,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998774684] [2023-11-19 07:37:23,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:23,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:23,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:23,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:23,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998774684] [2023-11-19 07:37:23,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998774684] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:23,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272189867] [2023-11-19 07:37:23,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:37:23,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:23,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:23,988 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:24,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714bdba5-a14e-484a-bdf8-d84fb325b1c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-19 07:37:24,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:37:24,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:37:24,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:37:24,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:24,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:24,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:24,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272189867] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:24,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:24,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-19 07:37:24,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417952576] [2023-11-19 07:37:24,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:24,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:37:24,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:24,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:37:24,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:37:24,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 161 [2023-11-19 07:37:24,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 764 transitions, 15763 flow. Second operand has 18 states, 18 states have (on average 68.83333333333333) internal successors, (1239), 18 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states 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 07:37:24,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:24,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 161 [2023-11-19 07:37:24,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:27,824 INFO L124 PetriNetUnfolderBase]: 2326/3901 cut-off events. [2023-11-19 07:37:27,825 INFO L125 PetriNetUnfolderBase]: For 71947/71947 co-relation queries the response was YES. [2023-11-19 07:37:27,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36843 conditions, 3901 events. 2326/3901 cut-off events. For 71947/71947 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 23924 event pairs, 342 based on Foata normal form. 34/3935 useless extension candidates. Maximal degree in co-relation 36495. Up to 2552 conditions per place. [2023-11-19 07:37:27,868 INFO L140 encePairwiseOnDemand]: 155/161 looper letters, 601 selfloop transitions, 382 changer transitions 13/996 dead transitions. [2023-11-19 07:37:27,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 996 transitions, 21693 flow [2023-11-19 07:37:27,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-19 07:37:27,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-19 07:37:27,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3132 transitions. [2023-11-19 07:37:27,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44212309429700736 [2023-11-19 07:37:27,875 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3132 transitions. [2023-11-19 07:37:27,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3132 transitions. [2023-11-19 07:37:27,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:27,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3132 transitions. [2023-11-19 07:37:27,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 71.18181818181819) internal successors, (3132), 44 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states 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 07:37:27,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 161.0) internal successors, (7245), 45 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states 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 07:37:27,890 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 161.0) internal successors, (7245), 45 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states 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 07:37:27,891 INFO L175 Difference]: Start difference. First operand has 326 places, 764 transitions, 15763 flow. Second operand 44 states and 3132 transitions. [2023-11-19 07:37:27,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 996 transitions, 21693 flow