./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.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_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/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_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/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_c42bc685-9718-424b-b4d0-dcec77d93ec3/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 e53c8de1752bcaae88365f4089aa38090949baac13984623f5e7e3707a7b4c63 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:06:00,095 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:06:00,215 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:06:00,226 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:06:00,227 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:06:00,279 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:06:00,281 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:06:00,281 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:06:00,283 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:06:00,288 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:06:00,289 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:06:00,290 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:06:00,291 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:06:00,293 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:06:00,293 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:06:00,294 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:06:00,294 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:06:00,294 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:06:00,295 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:06:00,296 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:06:00,296 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:06:00,297 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:06:00,297 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:06:00,298 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:06:00,298 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:06:00,299 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:06:00,300 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:06:00,300 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:06:00,300 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:06:00,301 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:06:00,302 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:06:00,303 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:06:00,303 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:06:00,303 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:06:00,304 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:06:00,304 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:06:00,304 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:06:00,304 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:06:00,305 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:06:00,305 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_c42bc685-9718-424b-b4d0-dcec77d93ec3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e53c8de1752bcaae88365f4089aa38090949baac13984623f5e7e3707a7b4c63 [2023-11-19 08:06:00,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:06:00,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:06:00,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:06:00,687 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:06:00,687 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:06:00,689 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2023-11-19 08:06:03,941 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:06:04,210 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:06:04,211 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2023-11-19 08:06:04,246 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/data/401e11586/11696ba26b344d63b1e8af6989db78e8/FLAGcc17544eb [2023-11-19 08:06:04,276 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/data/401e11586/11696ba26b344d63b1e8af6989db78e8 [2023-11-19 08:06:04,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:06:04,286 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:06:04,292 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:06:04,293 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:06:04,298 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:06:04,299 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:06:04" (1/1) ... [2023-11-19 08:06:04,300 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30fd910d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:04, skipping insertion in model container [2023-11-19 08:06:04,301 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:06:04" (1/1) ... [2023-11-19 08:06:04,344 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:06:04,597 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_c42bc685-9718-424b-b4d0-dcec77d93ec3/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2729,2742] [2023-11-19 08:06:04,616 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:06:04,626 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:06:04,673 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_c42bc685-9718-424b-b4d0-dcec77d93ec3/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2729,2742] [2023-11-19 08:06:04,676 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:06:04,688 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:06:04,688 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:06:04,696 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:06:04,697 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:04 WrapperNode [2023-11-19 08:06:04,697 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:06:04,698 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:06:04,699 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:06:04,699 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:06:04,706 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:04" (1/1) ... [2023-11-19 08:06:04,727 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:04" (1/1) ... [2023-11-19 08:06:04,764 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 125 [2023-11-19 08:06:04,764 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:06:04,765 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:06:04,765 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:06:04,766 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:06:04,776 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:04" (1/1) ... [2023-11-19 08:06:04,776 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:04" (1/1) ... [2023-11-19 08:06:04,793 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:04" (1/1) ... [2023-11-19 08:06:04,793 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:04" (1/1) ... [2023-11-19 08:06:04,801 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:04" (1/1) ... [2023-11-19 08:06:04,821 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:04" (1/1) ... [2023-11-19 08:06:04,823 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:04" (1/1) ... [2023-11-19 08:06:04,825 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:04" (1/1) ... [2023-11-19 08:06:04,829 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:06:04,829 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:06:04,830 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:06:04,830 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:06:04,831 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:04" (1/1) ... [2023-11-19 08:06:04,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:06:04,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:04,873 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:04,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:06:04,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:06:04,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:06:04,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:06:04,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:06:04,916 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 08:06:04,917 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 08:06:04,917 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 08:06:04,917 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 08:06:04,917 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 08:06:04,918 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 08:06:04,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:06:04,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 08:06:04,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 08:06:04,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 08:06:04,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:06:04,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:06:04,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:06:04,923 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 08:06:05,077 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:06:05,079 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:06:05,461 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:06:05,509 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:06:05,509 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-19 08:06:05,514 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:06:05 BoogieIcfgContainer [2023-11-19 08:06:05,514 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:06:05,517 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:06:05,517 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:06:05,528 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:06:05,529 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:06:04" (1/3) ... [2023-11-19 08:06:05,530 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565c52f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:06:05, skipping insertion in model container [2023-11-19 08:06:05,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:04" (2/3) ... [2023-11-19 08:06:05,532 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565c52f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:06:05, skipping insertion in model container [2023-11-19 08:06:05,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:06:05" (3/3) ... [2023-11-19 08:06:05,534 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2023-11-19 08:06:05,544 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 08:06:05,555 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:06:05,555 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:06:05,555 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:06:05,691 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 08:06:05,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 193 transitions, 407 flow [2023-11-19 08:06:05,876 INFO L124 PetriNetUnfolderBase]: 16/190 cut-off events. [2023-11-19 08:06:05,892 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 08:06:05,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 190 events. 16/190 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 139 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 147. Up to 2 conditions per place. [2023-11-19 08:06:05,898 INFO L82 GeneralOperation]: Start removeDead. Operand has 187 places, 193 transitions, 407 flow [2023-11-19 08:06:05,920 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 179 transitions, 376 flow [2023-11-19 08:06:05,924 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:06:05,951 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 179 transitions, 376 flow [2023-11-19 08:06:05,955 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 179 transitions, 376 flow [2023-11-19 08:06:05,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 179 transitions, 376 flow [2023-11-19 08:06:05,998 INFO L124 PetriNetUnfolderBase]: 16/179 cut-off events. [2023-11-19 08:06:05,998 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 08:06:06,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 179 events. 16/179 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 138 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 147. Up to 2 conditions per place. [2023-11-19 08:06:06,003 INFO L119 LiptonReduction]: Number of co-enabled transitions 2176 [2023-11-19 08:06:12,874 INFO L134 LiptonReduction]: Checked pairs total: 2749 [2023-11-19 08:06:12,874 INFO L136 LiptonReduction]: Total number of compositions: 180 [2023-11-19 08:06:12,891 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:06:12,898 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;@5811fd41, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:06:12,898 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 08:06:12,906 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:06:12,906 INFO L124 PetriNetUnfolderBase]: 6/28 cut-off events. [2023-11-19 08:06:12,907 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 08:06:12,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:12,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:12,908 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:06:12,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:12,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1655756603, now seen corresponding path program 1 times [2023-11-19 08:06:12,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:12,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414379755] [2023-11-19 08:06:12,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:12,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:13,973 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 08:06:13,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:13,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414379755] [2023-11-19 08:06:13,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414379755] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:13,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:13,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:06:13,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558563681] [2023-11-19 08:06:13,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:13,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:06:13,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:14,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:06:14,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:06:14,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 373 [2023-11-19 08:06:14,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states 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 08:06:14,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:14,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 373 [2023-11-19 08:06:14,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:14,538 INFO L124 PetriNetUnfolderBase]: 805/1146 cut-off events. [2023-11-19 08:06:14,540 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2023-11-19 08:06:14,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2403 conditions, 1146 events. 805/1146 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3749 event pairs, 506 based on Foata normal form. 1/847 useless extension candidates. Maximal degree in co-relation 918. Up to 651 conditions per place. [2023-11-19 08:06:14,558 INFO L140 encePairwiseOnDemand]: 367/373 looper letters, 50 selfloop transitions, 5 changer transitions 1/56 dead transitions. [2023-11-19 08:06:14,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 56 transitions, 260 flow [2023-11-19 08:06:14,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:06:14,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:06:14,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 689 transitions. [2023-11-19 08:06:14,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179624664879354 [2023-11-19 08:06:14,588 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 689 transitions. [2023-11-19 08:06:14,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 689 transitions. [2023-11-19 08:06:14,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:14,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 689 transitions. [2023-11-19 08:06:14,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 172.25) internal successors, (689), 4 states have internal predecessors, (689), 0 states have call successors, (0), 0 states 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 08:06:14,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 373.0) internal successors, (1865), 5 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states 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 08:06:14,623 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 373.0) internal successors, (1865), 5 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states 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 08:06:14,625 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 76 flow. Second operand 4 states and 689 transitions. [2023-11-19 08:06:14,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 56 transitions, 260 flow [2023-11-19 08:06:14,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 56 transitions, 236 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-19 08:06:14,634 INFO L231 Difference]: Finished difference. Result has 32 places, 33 transitions, 98 flow [2023-11-19 08:06:14,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=32, PETRI_TRANSITIONS=33} [2023-11-19 08:06:14,640 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2023-11-19 08:06:14,641 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 33 transitions, 98 flow [2023-11-19 08:06:14,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states 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 08:06:14,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:14,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:14,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:06:14,643 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:06:14,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:14,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1047882074, now seen corresponding path program 1 times [2023-11-19 08:06:14,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:14,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836733278] [2023-11-19 08:06:14,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:14,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:14,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:14,792 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 08:06:14,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:14,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836733278] [2023-11-19 08:06:14,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836733278] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:14,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309776934] [2023-11-19 08:06:14,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:14,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:14,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:14,800 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:14,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:06:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:14,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:06:14,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:14,998 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 08:06:14,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:15,042 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 08:06:15,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309776934] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:15,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:06:15,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-19 08:06:15,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124132446] [2023-11-19 08:06:15,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:15,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:06:15,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:15,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:06:15,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-19 08:06:15,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 373 [2023-11-19 08:06:15,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 33 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 160.4) internal successors, (802), 5 states have internal predecessors, (802), 0 states have call successors, (0), 0 states 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 08:06:15,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:15,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 373 [2023-11-19 08:06:15,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:15,571 INFO L124 PetriNetUnfolderBase]: 1568/2229 cut-off events. [2023-11-19 08:06:15,571 INFO L125 PetriNetUnfolderBase]: For 231/231 co-relation queries the response was YES. [2023-11-19 08:06:15,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4986 conditions, 2229 events. 1568/2229 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8494 event pairs, 1003 based on Foata normal form. 0/1805 useless extension candidates. Maximal degree in co-relation 3727. Up to 1145 conditions per place. [2023-11-19 08:06:15,591 INFO L140 encePairwiseOnDemand]: 368/373 looper letters, 56 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2023-11-19 08:06:15,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 62 transitions, 298 flow [2023-11-19 08:06:15,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:06:15,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:06:15,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 839 transitions. [2023-11-19 08:06:15,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986595174262733 [2023-11-19 08:06:15,597 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 839 transitions. [2023-11-19 08:06:15,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 839 transitions. [2023-11-19 08:06:15,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:15,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 839 transitions. [2023-11-19 08:06:15,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 167.8) internal successors, (839), 5 states have internal predecessors, (839), 0 states have call successors, (0), 0 states 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 08:06:15,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 373.0) internal successors, (2238), 6 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states 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 08:06:15,610 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 373.0) internal successors, (2238), 6 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states 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 08:06:15,610 INFO L175 Difference]: Start difference. First operand has 32 places, 33 transitions, 98 flow. Second operand 5 states and 839 transitions. [2023-11-19 08:06:15,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 62 transitions, 298 flow [2023-11-19 08:06:15,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 62 transitions, 290 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 08:06:15,614 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 122 flow [2023-11-19 08:06:15,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2023-11-19 08:06:15,615 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 4 predicate places. [2023-11-19 08:06:15,615 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 122 flow [2023-11-19 08:06:15,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 160.4) internal successors, (802), 5 states have internal predecessors, (802), 0 states have call successors, (0), 0 states 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 08:06:15,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:15,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:15,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:15,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:15,837 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:06:15,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:15,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1421783229, now seen corresponding path program 1 times [2023-11-19 08:06:15,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:15,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548281007] [2023-11-19 08:06:15,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:15,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:15,974 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 08:06:15,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:15,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548281007] [2023-11-19 08:06:15,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548281007] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:15,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:15,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:06:15,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250809] [2023-11-19 08:06:15,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:15,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:06:15,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:15,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:06:15,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:06:16,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 373 [2023-11-19 08:06:16,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 160.4) internal successors, (802), 5 states have internal predecessors, (802), 0 states have call successors, (0), 0 states 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 08:06:16,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:16,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 373 [2023-11-19 08:06:16,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:16,575 INFO L124 PetriNetUnfolderBase]: 1610/2329 cut-off events. [2023-11-19 08:06:16,575 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2023-11-19 08:06:16,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4949 conditions, 2329 events. 1610/2329 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9485 event pairs, 863 based on Foata normal form. 132/1958 useless extension candidates. Maximal degree in co-relation 3681. Up to 1272 conditions per place. [2023-11-19 08:06:16,593 INFO L140 encePairwiseOnDemand]: 365/373 looper letters, 66 selfloop transitions, 9 changer transitions 0/75 dead transitions. [2023-11-19 08:06:16,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 75 transitions, 370 flow [2023-11-19 08:06:16,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:06:16,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:06:16,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1010 transitions. [2023-11-19 08:06:16,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.451295799821269 [2023-11-19 08:06:16,598 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1010 transitions. [2023-11-19 08:06:16,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1010 transitions. [2023-11-19 08:06:16,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:16,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1010 transitions. [2023-11-19 08:06:16,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 168.33333333333334) internal successors, (1010), 6 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:16,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 373.0) internal successors, (2611), 7 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states 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 08:06:16,612 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 373.0) internal successors, (2611), 7 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states 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 08:06:16,613 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 122 flow. Second operand 6 states and 1010 transitions. [2023-11-19 08:06:16,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 75 transitions, 370 flow [2023-11-19 08:06:16,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 75 transitions, 366 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 08:06:16,617 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 148 flow [2023-11-19 08:06:16,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=148, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2023-11-19 08:06:16,618 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 10 predicate places. [2023-11-19 08:06:16,618 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 148 flow [2023-11-19 08:06:16,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 160.4) internal successors, (802), 5 states have internal predecessors, (802), 0 states have call successors, (0), 0 states 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 08:06:16,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:16,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:16,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:06:16,620 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:06:16,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:16,621 INFO L85 PathProgramCache]: Analyzing trace with hash -348438100, now seen corresponding path program 1 times [2023-11-19 08:06:16,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:16,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827249350] [2023-11-19 08:06:16,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:16,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:06:16,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:16,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827249350] [2023-11-19 08:06:16,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827249350] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:16,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255887399] [2023-11-19 08:06:16,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:16,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:16,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:16,747 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:16,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:06:16,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:16,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:06:16,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:06:16,914 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:16,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:06:16,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255887399] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:16,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:06:16,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-19 08:06:16,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844187995] [2023-11-19 08:06:16,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:16,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:06:16,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:16,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:06:16,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-19 08:06:17,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 373 [2023-11-19 08:06:17,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 155.6) internal successors, (778), 5 states have internal predecessors, (778), 0 states have call successors, (0), 0 states 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 08:06:17,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:17,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 373 [2023-11-19 08:06:17,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:17,487 INFO L124 PetriNetUnfolderBase]: 1396/2018 cut-off events. [2023-11-19 08:06:17,488 INFO L125 PetriNetUnfolderBase]: For 911/911 co-relation queries the response was YES. [2023-11-19 08:06:17,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4911 conditions, 2018 events. 1396/2018 cut-off events. For 911/911 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7932 event pairs, 761 based on Foata normal form. 108/1699 useless extension candidates. Maximal degree in co-relation 3118. Up to 876 conditions per place. [2023-11-19 08:06:17,503 INFO L140 encePairwiseOnDemand]: 366/373 looper letters, 67 selfloop transitions, 5 changer transitions 4/76 dead transitions. [2023-11-19 08:06:17,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 76 transitions, 404 flow [2023-11-19 08:06:17,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:06:17,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:06:17,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 827 transitions. [2023-11-19 08:06:17,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434316353887399 [2023-11-19 08:06:17,511 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 827 transitions. [2023-11-19 08:06:17,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 827 transitions. [2023-11-19 08:06:17,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:17,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 827 transitions. [2023-11-19 08:06:17,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 165.4) internal successors, (827), 5 states have internal predecessors, (827), 0 states have call successors, (0), 0 states 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 08:06:17,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 373.0) internal successors, (2238), 6 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states 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 08:06:17,523 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 373.0) internal successors, (2238), 6 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states 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 08:06:17,523 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 148 flow. Second operand 5 states and 827 transitions. [2023-11-19 08:06:17,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 76 transitions, 404 flow [2023-11-19 08:06:17,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 76 transitions, 393 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-19 08:06:17,537 INFO L231 Difference]: Finished difference. Result has 47 places, 37 transitions, 161 flow [2023-11-19 08:06:17,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=161, PETRI_PLACES=47, PETRI_TRANSITIONS=37} [2023-11-19 08:06:17,539 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 14 predicate places. [2023-11-19 08:06:17,539 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 37 transitions, 161 flow [2023-11-19 08:06:17,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 155.6) internal successors, (778), 5 states have internal predecessors, (778), 0 states have call successors, (0), 0 states 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 08:06:17,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:17,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:17,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:17,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:17,756 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:06:17,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:17,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1869373759, now seen corresponding path program 1 times [2023-11-19 08:06:17,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:17,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322276156] [2023-11-19 08:06:17,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:17,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:17,907 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 08:06:17,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:17,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322276156] [2023-11-19 08:06:17,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322276156] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:17,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:17,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:06:17,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033793114] [2023-11-19 08:06:17,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:17,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:06:17,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:17,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:06:17,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:06:18,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 373 [2023-11-19 08:06:18,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 37 transitions, 161 flow. Second operand has 5 states, 5 states have (on average 161.6) internal successors, (808), 5 states have internal predecessors, (808), 0 states have call successors, (0), 0 states 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 08:06:18,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:18,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 373 [2023-11-19 08:06:18,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:18,294 INFO L124 PetriNetUnfolderBase]: 730/1080 cut-off events. [2023-11-19 08:06:18,295 INFO L125 PetriNetUnfolderBase]: For 1432/1432 co-relation queries the response was YES. [2023-11-19 08:06:18,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2980 conditions, 1080 events. 730/1080 cut-off events. For 1432/1432 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3691 event pairs, 400 based on Foata normal form. 0/918 useless extension candidates. Maximal degree in co-relation 2013. Up to 723 conditions per place. [2023-11-19 08:06:18,302 INFO L140 encePairwiseOnDemand]: 365/373 looper letters, 28 selfloop transitions, 4 changer transitions 32/64 dead transitions. [2023-11-19 08:06:18,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 64 transitions, 361 flow [2023-11-19 08:06:18,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:06:18,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:06:18,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1007 transitions. [2023-11-19 08:06:18,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44995531724754245 [2023-11-19 08:06:18,307 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1007 transitions. [2023-11-19 08:06:18,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1007 transitions. [2023-11-19 08:06:18,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:18,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1007 transitions. [2023-11-19 08:06:18,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 167.83333333333334) internal successors, (1007), 6 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:18,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 373.0) internal successors, (2611), 7 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states 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 08:06:18,321 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 373.0) internal successors, (2611), 7 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states 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 08:06:18,321 INFO L175 Difference]: Start difference. First operand has 47 places, 37 transitions, 161 flow. Second operand 6 states and 1007 transitions. [2023-11-19 08:06:18,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 64 transitions, 361 flow [2023-11-19 08:06:18,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 64 transitions, 330 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-11-19 08:06:18,326 INFO L231 Difference]: Finished difference. Result has 49 places, 32 transitions, 124 flow [2023-11-19 08:06:18,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=124, PETRI_PLACES=49, PETRI_TRANSITIONS=32} [2023-11-19 08:06:18,329 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 16 predicate places. [2023-11-19 08:06:18,329 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 32 transitions, 124 flow [2023-11-19 08:06:18,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 161.6) internal successors, (808), 5 states have internal predecessors, (808), 0 states have call successors, (0), 0 states 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 08:06:18,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:18,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:18,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 08:06:18,331 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:06:18,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:18,332 INFO L85 PathProgramCache]: Analyzing trace with hash 526813362, now seen corresponding path program 1 times [2023-11-19 08:06:18,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:18,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45011605] [2023-11-19 08:06:18,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:18,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:18,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:06:18,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:18,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45011605] [2023-11-19 08:06:18,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45011605] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:18,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870129705] [2023-11-19 08:06:18,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:18,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:18,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:18,479 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:18,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:06:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:18,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:06:18,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:18,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:06:18,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:06:18,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870129705] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:18,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:18,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-19 08:06:18,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758816250] [2023-11-19 08:06:18,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:18,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 08:06:18,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:18,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 08:06:18,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-19 08:06:18,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 373 [2023-11-19 08:06:18,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 32 transitions, 124 flow. Second operand has 9 states, 9 states have (on average 155.0) internal successors, (1395), 9 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states 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 08:06:18,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:18,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 373 [2023-11-19 08:06:18,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:19,221 INFO L124 PetriNetUnfolderBase]: 753/1064 cut-off events. [2023-11-19 08:06:19,221 INFO L125 PetriNetUnfolderBase]: For 951/951 co-relation queries the response was YES. [2023-11-19 08:06:19,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2928 conditions, 1064 events. 753/1064 cut-off events. For 951/951 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3547 event pairs, 241 based on Foata normal form. 0/954 useless extension candidates. Maximal degree in co-relation 2899. Up to 548 conditions per place. [2023-11-19 08:06:19,230 INFO L140 encePairwiseOnDemand]: 364/373 looper letters, 53 selfloop transitions, 9 changer transitions 0/62 dead transitions. [2023-11-19 08:06:19,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 62 transitions, 360 flow [2023-11-19 08:06:19,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 08:06:19,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 08:06:19,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1268 transitions. [2023-11-19 08:06:19,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249329758713137 [2023-11-19 08:06:19,236 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1268 transitions. [2023-11-19 08:06:19,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1268 transitions. [2023-11-19 08:06:19,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:19,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1268 transitions. [2023-11-19 08:06:19,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 158.5) internal successors, (1268), 8 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states 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 08:06:19,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 373.0) internal successors, (3357), 9 states have internal predecessors, (3357), 0 states have call successors, (0), 0 states 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 08:06:19,249 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 373.0) internal successors, (3357), 9 states have internal predecessors, (3357), 0 states have call successors, (0), 0 states 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 08:06:19,249 INFO L175 Difference]: Start difference. First operand has 49 places, 32 transitions, 124 flow. Second operand 8 states and 1268 transitions. [2023-11-19 08:06:19,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 62 transitions, 360 flow [2023-11-19 08:06:19,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 62 transitions, 309 flow, removed 17 selfloop flow, removed 7 redundant places. [2023-11-19 08:06:19,257 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 130 flow [2023-11-19 08:06:19,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=130, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2023-11-19 08:06:19,260 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 11 predicate places. [2023-11-19 08:06:19,260 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 130 flow [2023-11-19 08:06:19,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 155.0) internal successors, (1395), 9 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states 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 08:06:19,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:19,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:19,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:19,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:19,476 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:06:19,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:19,477 INFO L85 PathProgramCache]: Analyzing trace with hash 746892995, now seen corresponding path program 1 times [2023-11-19 08:06:19,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:19,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053831987] [2023-11-19 08:06:19,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:19,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:06:19,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:19,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053831987] [2023-11-19 08:06:19,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053831987] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:19,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753260541] [2023-11-19 08:06:19,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:19,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:19,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:19,647 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:19,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:06:19,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:19,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:06:19,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:19,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:06:19,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:06:19,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753260541] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:19,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:19,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-19 08:06:19,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437580311] [2023-11-19 08:06:19,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:19,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 08:06:19,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:19,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 08:06:19,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-19 08:06:20,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 373 [2023-11-19 08:06:20,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 130 flow. Second operand has 9 states, 9 states have (on average 156.0) internal successors, (1404), 9 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states 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 08:06:20,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:20,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 373 [2023-11-19 08:06:20,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:20,491 INFO L124 PetriNetUnfolderBase]: 1315/1812 cut-off events. [2023-11-19 08:06:20,491 INFO L125 PetriNetUnfolderBase]: For 1412/1412 co-relation queries the response was YES. [2023-11-19 08:06:20,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4991 conditions, 1812 events. 1315/1812 cut-off events. For 1412/1412 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 6192 event pairs, 393 based on Foata normal form. 0/1564 useless extension candidates. Maximal degree in co-relation 4966. Up to 788 conditions per place. [2023-11-19 08:06:20,506 INFO L140 encePairwiseOnDemand]: 363/373 looper letters, 59 selfloop transitions, 10 changer transitions 0/69 dead transitions. [2023-11-19 08:06:20,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 69 transitions, 400 flow [2023-11-19 08:06:20,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 08:06:20,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 08:06:20,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1278 transitions. [2023-11-19 08:06:20,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42828418230563003 [2023-11-19 08:06:20,513 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1278 transitions. [2023-11-19 08:06:20,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1278 transitions. [2023-11-19 08:06:20,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:20,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1278 transitions. [2023-11-19 08:06:20,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 159.75) internal successors, (1278), 8 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states 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 08:06:20,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 373.0) internal successors, (3357), 9 states have internal predecessors, (3357), 0 states have call successors, (0), 0 states 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 08:06:20,526 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 373.0) internal successors, (3357), 9 states have internal predecessors, (3357), 0 states have call successors, (0), 0 states 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 08:06:20,526 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 130 flow. Second operand 8 states and 1278 transitions. [2023-11-19 08:06:20,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 69 transitions, 400 flow [2023-11-19 08:06:20,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 69 transitions, 391 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-19 08:06:20,530 INFO L231 Difference]: Finished difference. Result has 50 places, 37 transitions, 168 flow [2023-11-19 08:06:20,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=168, PETRI_PLACES=50, PETRI_TRANSITIONS=37} [2023-11-19 08:06:20,531 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 17 predicate places. [2023-11-19 08:06:20,531 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 37 transitions, 168 flow [2023-11-19 08:06:20,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 156.0) internal successors, (1404), 9 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states 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 08:06:20,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:20,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:20,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:20,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 08:06:20,748 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:06:20,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:20,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1293470965, now seen corresponding path program 1 times [2023-11-19 08:06:20,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:20,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825572166] [2023-11-19 08:06:20,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:20,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:20,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 08:06:21,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:21,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825572166] [2023-11-19 08:06:21,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825572166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:21,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:21,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:06:21,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896522347] [2023-11-19 08:06:21,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:21,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:06:21,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:21,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:06:21,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:06:21,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 373 [2023-11-19 08:06:21,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 37 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 172.6) internal successors, (863), 5 states have internal predecessors, (863), 0 states have call successors, (0), 0 states 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 08:06:21,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:21,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 373 [2023-11-19 08:06:21,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:21,391 INFO L124 PetriNetUnfolderBase]: 1061/1496 cut-off events. [2023-11-19 08:06:21,391 INFO L125 PetriNetUnfolderBase]: For 1346/1346 co-relation queries the response was YES. [2023-11-19 08:06:21,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4814 conditions, 1496 events. 1061/1496 cut-off events. For 1346/1346 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4847 event pairs, 203 based on Foata normal form. 0/1400 useless extension candidates. Maximal degree in co-relation 4786. Up to 941 conditions per place. [2023-11-19 08:06:21,404 INFO L140 encePairwiseOnDemand]: 368/373 looper letters, 71 selfloop transitions, 9 changer transitions 6/86 dead transitions. [2023-11-19 08:06:21,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 86 transitions, 524 flow [2023-11-19 08:06:21,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:06:21,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:06:21,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1080 transitions. [2023-11-19 08:06:21,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48257372654155495 [2023-11-19 08:06:21,410 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1080 transitions. [2023-11-19 08:06:21,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1080 transitions. [2023-11-19 08:06:21,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:21,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1080 transitions. [2023-11-19 08:06:21,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 180.0) internal successors, (1080), 6 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states 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 08:06:21,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 373.0) internal successors, (2611), 7 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states 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 08:06:21,421 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 373.0) internal successors, (2611), 7 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states 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 08:06:21,421 INFO L175 Difference]: Start difference. First operand has 50 places, 37 transitions, 168 flow. Second operand 6 states and 1080 transitions. [2023-11-19 08:06:21,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 86 transitions, 524 flow [2023-11-19 08:06:21,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 86 transitions, 515 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 08:06:21,427 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 226 flow [2023-11-19 08:06:21,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=226, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2023-11-19 08:06:21,428 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 20 predicate places. [2023-11-19 08:06:21,428 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 226 flow [2023-11-19 08:06:21,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 172.6) internal successors, (863), 5 states have internal predecessors, (863), 0 states have call successors, (0), 0 states 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 08:06:21,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:21,429 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:21,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 08:06:21,430 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:06:21,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:21,430 INFO L85 PathProgramCache]: Analyzing trace with hash -441471196, now seen corresponding path program 2 times [2023-11-19 08:06:21,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:21,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232922474] [2023-11-19 08:06:21,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:21,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:21,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 08:06:21,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:21,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232922474] [2023-11-19 08:06:21,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232922474] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:21,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712957667] [2023-11-19 08:06:21,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:06:21,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:21,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:21,632 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:21,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:06:21,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:06:21,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:06:21,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:06:21,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:21,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 08:06:21,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:21,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 08:06:21,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712957667] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:21,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:21,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-19 08:06:21,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753949484] [2023-11-19 08:06:21,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:21,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 08:06:21,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:21,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 08:06:21,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-19 08:06:22,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 373 [2023-11-19 08:06:22,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 226 flow. Second operand has 14 states, 14 states have (on average 154.28571428571428) internal successors, (2160), 14 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states 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 08:06:22,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:22,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 373 [2023-11-19 08:06:22,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:22,872 INFO L124 PetriNetUnfolderBase]: 1369/1962 cut-off events. [2023-11-19 08:06:22,872 INFO L125 PetriNetUnfolderBase]: For 3240/3240 co-relation queries the response was YES. [2023-11-19 08:06:22,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6809 conditions, 1962 events. 1369/1962 cut-off events. For 3240/3240 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 6648 event pairs, 730 based on Foata normal form. 28/1958 useless extension candidates. Maximal degree in co-relation 5308. Up to 1495 conditions per place. [2023-11-19 08:06:22,887 INFO L140 encePairwiseOnDemand]: 364/373 looper letters, 39 selfloop transitions, 6 changer transitions 51/96 dead transitions. [2023-11-19 08:06:22,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 96 transitions, 651 flow [2023-11-19 08:06:22,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 08:06:22,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 08:06:22,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1590 transitions. [2023-11-19 08:06:22,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4262734584450402 [2023-11-19 08:06:22,895 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1590 transitions. [2023-11-19 08:06:22,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1590 transitions. [2023-11-19 08:06:22,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:22,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1590 transitions. [2023-11-19 08:06:22,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 159.0) internal successors, (1590), 10 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states 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 08:06:22,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 373.0) internal successors, (4103), 11 states have internal predecessors, (4103), 0 states have call successors, (0), 0 states 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 08:06:22,911 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 373.0) internal successors, (4103), 11 states have internal predecessors, (4103), 0 states have call successors, (0), 0 states 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 08:06:22,912 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 226 flow. Second operand 10 states and 1590 transitions. [2023-11-19 08:06:22,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 96 transitions, 651 flow [2023-11-19 08:06:22,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 96 transitions, 643 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:06:22,928 INFO L231 Difference]: Finished difference. Result has 67 places, 45 transitions, 270 flow [2023-11-19 08:06:22,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=270, PETRI_PLACES=67, PETRI_TRANSITIONS=45} [2023-11-19 08:06:22,929 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 34 predicate places. [2023-11-19 08:06:22,929 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 45 transitions, 270 flow [2023-11-19 08:06:22,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 154.28571428571428) internal successors, (2160), 14 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states 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 08:06:22,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:22,931 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:22,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:23,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:23,152 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:06:23,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:23,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1299018307, now seen corresponding path program 3 times [2023-11-19 08:06:23,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:23,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890733449] [2023-11-19 08:06:23,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:23,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 08:06:23,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:23,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890733449] [2023-11-19 08:06:23,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890733449] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:23,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522869911] [2023-11-19 08:06:23,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 08:06:23,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:23,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:23,351 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:23,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:06:23,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 08:06:23,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:06:23,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:06:23,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 08:06:23,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 08:06:23,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522869911] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:23,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:23,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-19 08:06:23,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937656580] [2023-11-19 08:06:23,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:23,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 08:06:23,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:23,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 08:06:23,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-19 08:06:24,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 373 [2023-11-19 08:06:24,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 45 transitions, 270 flow. Second operand has 14 states, 14 states have (on average 154.07142857142858) internal successors, (2157), 14 states have internal predecessors, (2157), 0 states have call successors, (0), 0 states 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 08:06:24,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:24,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 373 [2023-11-19 08:06:24,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:24,523 INFO L124 PetriNetUnfolderBase]: 1282/1805 cut-off events. [2023-11-19 08:06:24,523 INFO L125 PetriNetUnfolderBase]: For 3774/3774 co-relation queries the response was YES. [2023-11-19 08:06:24,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6684 conditions, 1805 events. 1282/1805 cut-off events. For 3774/3774 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 6244 event pairs, 494 based on Foata normal form. 86/1853 useless extension candidates. Maximal degree in co-relation 6640. Up to 1183 conditions per place. [2023-11-19 08:06:24,554 INFO L140 encePairwiseOnDemand]: 365/373 looper letters, 87 selfloop transitions, 9 changer transitions 0/96 dead transitions. [2023-11-19 08:06:24,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 96 transitions, 794 flow [2023-11-19 08:06:24,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 08:06:24,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-19 08:06:24,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1422 transitions. [2023-11-19 08:06:24,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42359249329758714 [2023-11-19 08:06:24,562 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1422 transitions. [2023-11-19 08:06:24,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1422 transitions. [2023-11-19 08:06:24,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:24,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1422 transitions. [2023-11-19 08:06:24,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 158.0) internal successors, (1422), 9 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states 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 08:06:24,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 373.0) internal successors, (3730), 10 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states 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 08:06:24,587 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 373.0) internal successors, (3730), 10 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states 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 08:06:24,595 INFO L175 Difference]: Start difference. First operand has 67 places, 45 transitions, 270 flow. Second operand 9 states and 1422 transitions. [2023-11-19 08:06:24,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 96 transitions, 794 flow [2023-11-19 08:06:24,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 96 transitions, 744 flow, removed 23 selfloop flow, removed 6 redundant places. [2023-11-19 08:06:24,605 INFO L231 Difference]: Finished difference. Result has 64 places, 46 transitions, 274 flow [2023-11-19 08:06:24,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=274, PETRI_PLACES=64, PETRI_TRANSITIONS=46} [2023-11-19 08:06:24,606 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 31 predicate places. [2023-11-19 08:06:24,606 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 46 transitions, 274 flow [2023-11-19 08:06:24,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 154.07142857142858) internal successors, (2157), 14 states have internal predecessors, (2157), 0 states have call successors, (0), 0 states 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 08:06:24,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:24,608 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:24,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:24,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:24,824 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:06:24,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:24,825 INFO L85 PathProgramCache]: Analyzing trace with hash -907741299, now seen corresponding path program 4 times [2023-11-19 08:06:24,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:24,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285263641] [2023-11-19 08:06:24,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:24,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:24,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 08:06:25,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:25,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285263641] [2023-11-19 08:06:25,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285263641] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:25,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837576810] [2023-11-19 08:06:25,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 08:06:25,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:25,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:25,011 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:25,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:06:25,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 08:06:25,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:06:25,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:06:25,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 08:06:25,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 08:06:25,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837576810] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:25,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:25,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-11-19 08:06:25,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643376306] [2023-11-19 08:06:25,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:25,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 08:06:25,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:25,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 08:06:25,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:06:25,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 373 [2023-11-19 08:06:25,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 46 transitions, 274 flow. Second operand has 12 states, 12 states have (on average 151.75) internal successors, (1821), 12 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states 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 08:06:25,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:25,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 373 [2023-11-19 08:06:25,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:26,572 INFO L124 PetriNetUnfolderBase]: 1625/2262 cut-off events. [2023-11-19 08:06:26,572 INFO L125 PetriNetUnfolderBase]: For 4282/4282 co-relation queries the response was YES. [2023-11-19 08:06:26,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8618 conditions, 2262 events. 1625/2262 cut-off events. For 4282/4282 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 7881 event pairs, 169 based on Foata normal form. 38/2224 useless extension candidates. Maximal degree in co-relation 8576. Up to 567 conditions per place. [2023-11-19 08:06:26,590 INFO L140 encePairwiseOnDemand]: 360/373 looper letters, 141 selfloop transitions, 42 changer transitions 0/183 dead transitions. [2023-11-19 08:06:26,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 183 transitions, 1386 flow [2023-11-19 08:06:26,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 08:06:26,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-19 08:06:26,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2797 transitions. [2023-11-19 08:06:26,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41659219541257075 [2023-11-19 08:06:26,602 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2797 transitions. [2023-11-19 08:06:26,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2797 transitions. [2023-11-19 08:06:26,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:26,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2797 transitions. [2023-11-19 08:06:26,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 155.38888888888889) internal successors, (2797), 18 states have internal predecessors, (2797), 0 states have call successors, (0), 0 states 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 08:06:26,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 373.0) internal successors, (7087), 19 states have internal predecessors, (7087), 0 states have call successors, (0), 0 states 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 08:06:26,627 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 373.0) internal successors, (7087), 19 states have internal predecessors, (7087), 0 states have call successors, (0), 0 states 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 08:06:26,627 INFO L175 Difference]: Start difference. First operand has 64 places, 46 transitions, 274 flow. Second operand 18 states and 2797 transitions. [2023-11-19 08:06:26,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 183 transitions, 1386 flow [2023-11-19 08:06:26,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 183 transitions, 1342 flow, removed 9 selfloop flow, removed 6 redundant places. [2023-11-19 08:06:26,640 INFO L231 Difference]: Finished difference. Result has 81 places, 74 transitions, 588 flow [2023-11-19 08:06:26,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=588, PETRI_PLACES=81, PETRI_TRANSITIONS=74} [2023-11-19 08:06:26,641 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 48 predicate places. [2023-11-19 08:06:26,641 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 74 transitions, 588 flow [2023-11-19 08:06:26,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 151.75) internal successors, (1821), 12 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states 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 08:06:26,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:26,642 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:26,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:26,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:26,863 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:06:26,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:26,864 INFO L85 PathProgramCache]: Analyzing trace with hash -447516991, now seen corresponding path program 5 times [2023-11-19 08:06:26,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:26,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449121160] [2023-11-19 08:06:26,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:26,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:26,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 08:06:27,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:27,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449121160] [2023-11-19 08:06:27,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449121160] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:27,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323444742] [2023-11-19 08:06:27,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 08:06:27,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:27,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:27,193 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:27,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:06:27,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-19 08:06:27,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:06:27,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:06:27,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:27,457 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 08:06:27,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 08:06:27,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323444742] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:27,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:27,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-19 08:06:27,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268174329] [2023-11-19 08:06:27,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:27,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 08:06:27,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:27,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 08:06:27,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-19 08:06:27,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 373 [2023-11-19 08:06:27,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 74 transitions, 588 flow. Second operand has 13 states, 13 states have (on average 170.53846153846155) internal successors, (2217), 13 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states 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 08:06:27,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:27,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 373 [2023-11-19 08:06:27,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:28,796 INFO L124 PetriNetUnfolderBase]: 2826/3951 cut-off events. [2023-11-19 08:06:28,797 INFO L125 PetriNetUnfolderBase]: For 10437/10437 co-relation queries the response was YES. [2023-11-19 08:06:28,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15742 conditions, 3951 events. 2826/3951 cut-off events. For 10437/10437 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 15484 event pairs, 641 based on Foata normal form. 190/4065 useless extension candidates. Maximal degree in co-relation 15694. Up to 1719 conditions per place. [2023-11-19 08:06:28,833 INFO L140 encePairwiseOnDemand]: 366/373 looper letters, 192 selfloop transitions, 36 changer transitions 16/244 dead transitions. [2023-11-19 08:06:28,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 244 transitions, 2019 flow [2023-11-19 08:06:28,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 08:06:28,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 08:06:28,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2503 transitions. [2023-11-19 08:06:28,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4793182688625048 [2023-11-19 08:06:28,843 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2503 transitions. [2023-11-19 08:06:28,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2503 transitions. [2023-11-19 08:06:28,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:28,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2503 transitions. [2023-11-19 08:06:28,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 178.78571428571428) internal successors, (2503), 14 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states 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 08:06:28,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 373.0) internal successors, (5595), 15 states have internal predecessors, (5595), 0 states have call successors, (0), 0 states 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 08:06:28,862 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 373.0) internal successors, (5595), 15 states have internal predecessors, (5595), 0 states have call successors, (0), 0 states 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 08:06:28,863 INFO L175 Difference]: Start difference. First operand has 81 places, 74 transitions, 588 flow. Second operand 14 states and 2503 transitions. [2023-11-19 08:06:28,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 244 transitions, 2019 flow [2023-11-19 08:06:28,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 244 transitions, 1894 flow, removed 28 selfloop flow, removed 7 redundant places. [2023-11-19 08:06:28,922 INFO L231 Difference]: Finished difference. Result has 98 places, 98 transitions, 903 flow [2023-11-19 08:06:28,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=903, PETRI_PLACES=98, PETRI_TRANSITIONS=98} [2023-11-19 08:06:28,923 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 65 predicate places. [2023-11-19 08:06:28,923 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 98 transitions, 903 flow [2023-11-19 08:06:28,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 170.53846153846155) internal successors, (2217), 13 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states 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 08:06:28,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:28,924 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:28,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:29,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:29,140 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:06:29,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:29,141 INFO L85 PathProgramCache]: Analyzing trace with hash 177303863, now seen corresponding path program 6 times [2023-11-19 08:06:29,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:29,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839894512] [2023-11-19 08:06:29,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:29,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 08:06:29,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:29,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839894512] [2023-11-19 08:06:29,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839894512] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:29,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341343198] [2023-11-19 08:06:29,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 08:06:29,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:29,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:29,432 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:29,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 08:06:29,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-19 08:06:29,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:06:29,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:06:29,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 08:06:29,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:29,747 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 08:06:29,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341343198] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:29,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:29,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-19 08:06:29,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093267017] [2023-11-19 08:06:29,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:29,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 08:06:29,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:29,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 08:06:29,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:06:29,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 373 [2023-11-19 08:06:29,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 98 transitions, 903 flow. Second operand has 11 states, 11 states have (on average 171.0) internal successors, (1881), 11 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states 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 08:06:29,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:29,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 373 [2023-11-19 08:06:29,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:30,954 INFO L124 PetriNetUnfolderBase]: 3302/4619 cut-off events. [2023-11-19 08:06:30,954 INFO L125 PetriNetUnfolderBase]: For 25057/25057 co-relation queries the response was YES. [2023-11-19 08:06:30,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23813 conditions, 4619 events. 3302/4619 cut-off events. For 25057/25057 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 18368 event pairs, 339 based on Foata normal form. 38/4657 useless extension candidates. Maximal degree in co-relation 23759. Up to 1541 conditions per place. [2023-11-19 08:06:31,000 INFO L140 encePairwiseOnDemand]: 366/373 looper letters, 175 selfloop transitions, 51 changer transitions 15/241 dead transitions. [2023-11-19 08:06:31,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 241 transitions, 2219 flow [2023-11-19 08:06:31,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 08:06:31,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-19 08:06:31,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2325 transitions. [2023-11-19 08:06:31,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4794803052175706 [2023-11-19 08:06:31,007 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2325 transitions. [2023-11-19 08:06:31,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2325 transitions. [2023-11-19 08:06:31,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:31,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2325 transitions. [2023-11-19 08:06:31,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 178.84615384615384) internal successors, (2325), 13 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states 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 08:06:31,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 373.0) internal successors, (5222), 14 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states 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 08:06:31,023 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 373.0) internal successors, (5222), 14 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states 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 08:06:31,023 INFO L175 Difference]: Start difference. First operand has 98 places, 98 transitions, 903 flow. Second operand 13 states and 2325 transitions. [2023-11-19 08:06:31,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 241 transitions, 2219 flow [2023-11-19 08:06:31,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 241 transitions, 2205 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-11-19 08:06:31,124 INFO L231 Difference]: Finished difference. Result has 114 places, 111 transitions, 1199 flow [2023-11-19 08:06:31,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1199, PETRI_PLACES=114, PETRI_TRANSITIONS=111} [2023-11-19 08:06:31,125 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 81 predicate places. [2023-11-19 08:06:31,126 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 111 transitions, 1199 flow [2023-11-19 08:06:31,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 171.0) internal successors, (1881), 11 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states 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 08:06:31,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:31,127 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:31,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:31,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 08:06:31,347 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:06:31,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:31,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1146961962, now seen corresponding path program 7 times [2023-11-19 08:06:31,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:31,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560310112] [2023-11-19 08:06:31,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:31,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:31,615 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 08:06:31,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:31,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560310112] [2023-11-19 08:06:31,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560310112] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:31,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910737444] [2023-11-19 08:06:31,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 08:06:31,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:31,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:31,618 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:31,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 08:06:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:31,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 08:06:31,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 08:06:31,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:32,013 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 08:06:32,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910737444] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:32,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:32,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-19 08:06:32,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134579839] [2023-11-19 08:06:32,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:32,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 08:06:32,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:32,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 08:06:32,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-11-19 08:06:32,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 373 [2023-11-19 08:06:32,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 111 transitions, 1199 flow. Second operand has 19 states, 19 states have (on average 153.78947368421052) internal successors, (2922), 19 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states 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 08:06:32,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:32,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 373 [2023-11-19 08:06:32,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:34,317 INFO L124 PetriNetUnfolderBase]: 4693/6659 cut-off events. [2023-11-19 08:06:34,318 INFO L125 PetriNetUnfolderBase]: For 47627/47627 co-relation queries the response was YES. [2023-11-19 08:06:34,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36458 conditions, 6659 events. 4693/6659 cut-off events. For 47627/47627 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 29295 event pairs, 1877 based on Foata normal form. 142/6801 useless extension candidates. Maximal degree in co-relation 33911. Up to 4616 conditions per place. [2023-11-19 08:06:34,384 INFO L140 encePairwiseOnDemand]: 364/373 looper letters, 105 selfloop transitions, 8 changer transitions 132/245 dead transitions. [2023-11-19 08:06:34,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 245 transitions, 2952 flow [2023-11-19 08:06:34,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 08:06:34,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-19 08:06:34,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2062 transitions. [2023-11-19 08:06:34,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252423180037121 [2023-11-19 08:06:34,390 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2062 transitions. [2023-11-19 08:06:34,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2062 transitions. [2023-11-19 08:06:34,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:34,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2062 transitions. [2023-11-19 08:06:34,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 158.6153846153846) internal successors, (2062), 13 states have internal predecessors, (2062), 0 states have call successors, (0), 0 states 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 08:06:34,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 373.0) internal successors, (5222), 14 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states 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 08:06:34,404 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 373.0) internal successors, (5222), 14 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states 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 08:06:34,405 INFO L175 Difference]: Start difference. First operand has 114 places, 111 transitions, 1199 flow. Second operand 13 states and 2062 transitions. [2023-11-19 08:06:34,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 245 transitions, 2952 flow [2023-11-19 08:06:34,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 245 transitions, 2886 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-11-19 08:06:34,640 INFO L231 Difference]: Finished difference. Result has 129 places, 113 transitions, 1235 flow [2023-11-19 08:06:34,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=1161, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1235, PETRI_PLACES=129, PETRI_TRANSITIONS=113} [2023-11-19 08:06:34,642 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 96 predicate places. [2023-11-19 08:06:34,642 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 113 transitions, 1235 flow [2023-11-19 08:06:34,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 153.78947368421052) internal successors, (2922), 19 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states 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 08:06:34,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:34,643 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:34,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:34,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 08:06:34,852 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:06:34,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:34,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1617725159, now seen corresponding path program 8 times [2023-11-19 08:06:34,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:34,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808589401] [2023-11-19 08:06:34,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:34,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:35,171 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-19 08:06:35,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:35,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808589401] [2023-11-19 08:06:35,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808589401] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:35,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140130248] [2023-11-19 08:06:35,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:06:35,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:35,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:35,176 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:35,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 08:06:35,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:06:35,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:06:35,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 08:06:35,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:35,476 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-19 08:06:35,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:35,583 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-19 08:06:35,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140130248] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:35,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:35,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-19 08:06:35,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020754580] [2023-11-19 08:06:35,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:35,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 08:06:35,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:35,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 08:06:35,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-11-19 08:06:36,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 373 [2023-11-19 08:06:36,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 113 transitions, 1235 flow. Second operand has 19 states, 19 states have (on average 153.6315789473684) internal successors, (2919), 19 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states 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 08:06:36,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:36,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 373 [2023-11-19 08:06:36,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:37,154 INFO L124 PetriNetUnfolderBase]: 3865/5398 cut-off events. [2023-11-19 08:06:37,154 INFO L125 PetriNetUnfolderBase]: For 43586/43586 co-relation queries the response was YES. [2023-11-19 08:06:37,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30399 conditions, 5398 events. 3865/5398 cut-off events. For 43586/43586 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 22535 event pairs, 1060 based on Foata normal form. 214/5612 useless extension candidates. Maximal degree in co-relation 30320. Up to 3057 conditions per place. [2023-11-19 08:06:37,210 INFO L140 encePairwiseOnDemand]: 365/373 looper letters, 255 selfloop transitions, 18 changer transitions 0/273 dead transitions. [2023-11-19 08:06:37,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 273 transitions, 3701 flow [2023-11-19 08:06:37,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 08:06:37,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 08:06:37,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1892 transitions. [2023-11-19 08:06:37,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226988382484361 [2023-11-19 08:06:37,216 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1892 transitions. [2023-11-19 08:06:37,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1892 transitions. [2023-11-19 08:06:37,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:37,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1892 transitions. [2023-11-19 08:06:37,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 157.66666666666666) internal successors, (1892), 12 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states 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 08:06:37,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 373.0) internal successors, (4849), 13 states have internal predecessors, (4849), 0 states have call successors, (0), 0 states 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 08:06:37,230 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 373.0) internal successors, (4849), 13 states have internal predecessors, (4849), 0 states have call successors, (0), 0 states 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 08:06:37,231 INFO L175 Difference]: Start difference. First operand has 129 places, 113 transitions, 1235 flow. Second operand 12 states and 1892 transitions. [2023-11-19 08:06:37,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 273 transitions, 3701 flow [2023-11-19 08:06:37,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 273 transitions, 3555 flow, removed 67 selfloop flow, removed 9 redundant places. [2023-11-19 08:06:37,389 INFO L231 Difference]: Finished difference. Result has 124 places, 114 transitions, 1235 flow [2023-11-19 08:06:37,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=1179, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1235, PETRI_PLACES=124, PETRI_TRANSITIONS=114} [2023-11-19 08:06:37,391 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 91 predicate places. [2023-11-19 08:06:37,391 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 114 transitions, 1235 flow [2023-11-19 08:06:37,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 153.6315789473684) internal successors, (2919), 19 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states 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 08:06:37,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:37,392 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:37,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:37,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 08:06:37,614 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:06:37,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:37,614 INFO L85 PathProgramCache]: Analyzing trace with hash -2111743057, now seen corresponding path program 9 times [2023-11-19 08:06:37,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:37,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093910551] [2023-11-19 08:06:37,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:37,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:37,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-19 08:06:37,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:37,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093910551] [2023-11-19 08:06:37,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093910551] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:37,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702828324] [2023-11-19 08:06:37,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 08:06:37,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:37,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:37,900 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:37,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 08:06:38,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 08:06:38,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:06:38,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 08:06:38,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:38,247 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-19 08:06:38,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:38,383 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-19 08:06:38,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702828324] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:38,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:38,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-19 08:06:38,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938116024] [2023-11-19 08:06:38,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:38,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 08:06:38,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:38,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 08:06:38,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-11-19 08:06:38,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 373 [2023-11-19 08:06:38,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 114 transitions, 1235 flow. Second operand has 19 states, 19 states have (on average 154.57894736842104) internal successors, (2937), 19 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states 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 08:06:38,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:38,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 373 [2023-11-19 08:06:38,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:40,108 INFO L124 PetriNetUnfolderBase]: 4369/6078 cut-off events. [2023-11-19 08:06:40,108 INFO L125 PetriNetUnfolderBase]: For 43269/43269 co-relation queries the response was YES. [2023-11-19 08:06:40,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34769 conditions, 6078 events. 4369/6078 cut-off events. For 43269/43269 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 24522 event pairs, 643 based on Foata normal form. 44/6122 useless extension candidates. Maximal degree in co-relation 34696. Up to 2354 conditions per place. [2023-11-19 08:06:40,155 INFO L140 encePairwiseOnDemand]: 363/373 looper letters, 139 selfloop transitions, 47 changer transitions 0/186 dead transitions. [2023-11-19 08:06:40,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 186 transitions, 2192 flow [2023-11-19 08:06:40,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 08:06:40,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-19 08:06:40,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2067 transitions. [2023-11-19 08:06:40,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4262734584450402 [2023-11-19 08:06:40,160 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2067 transitions. [2023-11-19 08:06:40,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2067 transitions. [2023-11-19 08:06:40,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:40,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2067 transitions. [2023-11-19 08:06:40,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 159.0) internal successors, (2067), 13 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states 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 08:06:40,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 373.0) internal successors, (5222), 14 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states 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 08:06:40,175 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 373.0) internal successors, (5222), 14 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states 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 08:06:40,175 INFO L175 Difference]: Start difference. First operand has 124 places, 114 transitions, 1235 flow. Second operand 13 states and 2067 transitions. [2023-11-19 08:06:40,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 186 transitions, 2192 flow [2023-11-19 08:06:40,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 186 transitions, 2108 flow, removed 17 selfloop flow, removed 9 redundant places. [2023-11-19 08:06:40,357 INFO L231 Difference]: Finished difference. Result has 129 places, 123 transitions, 1437 flow [2023-11-19 08:06:40,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1437, PETRI_PLACES=129, PETRI_TRANSITIONS=123} [2023-11-19 08:06:40,358 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 96 predicate places. [2023-11-19 08:06:40,358 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 123 transitions, 1437 flow [2023-11-19 08:06:40,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 154.57894736842104) internal successors, (2937), 19 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states 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 08:06:40,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:40,359 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:40,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:40,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-19 08:06:40,576 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:06:40,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:40,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1860731367, now seen corresponding path program 10 times [2023-11-19 08:06:40,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:40,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442719983] [2023-11-19 08:06:40,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:40,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:40,897 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 08:06:40,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:40,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442719983] [2023-11-19 08:06:40,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442719983] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:40,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933857589] [2023-11-19 08:06:40,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 08:06:40,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:40,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:40,899 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:40,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 08:06:41,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 08:06:41,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:06:41,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 08:06:41,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:41,270 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 08:06:41,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 08:06:41,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933857589] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:41,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:41,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-19 08:06:41,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659010589] [2023-11-19 08:06:41,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:41,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 08:06:41,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:41,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 08:06:41,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-19 08:06:41,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 373 [2023-11-19 08:06:41,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 123 transitions, 1437 flow. Second operand has 14 states, 14 states have (on average 170.78571428571428) internal successors, (2391), 14 states have internal predecessors, (2391), 0 states have call successors, (0), 0 states 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 08:06:41,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:41,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 373 [2023-11-19 08:06:41,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:43,517 INFO L124 PetriNetUnfolderBase]: 5969/8286 cut-off events. [2023-11-19 08:06:43,517 INFO L125 PetriNetUnfolderBase]: For 57302/57302 co-relation queries the response was YES. [2023-11-19 08:06:43,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47061 conditions, 8286 events. 5969/8286 cut-off events. For 57302/57302 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 35175 event pairs, 497 based on Foata normal form. 44/8330 useless extension candidates. Maximal degree in co-relation 46987. Up to 2243 conditions per place. [2023-11-19 08:06:43,585 INFO L140 encePairwiseOnDemand]: 365/373 looper letters, 290 selfloop transitions, 81 changer transitions 56/427 dead transitions. [2023-11-19 08:06:43,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 427 transitions, 4543 flow [2023-11-19 08:06:43,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-19 08:06:43,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-19 08:06:43,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3931 transitions. [2023-11-19 08:06:43,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47903972702900316 [2023-11-19 08:06:43,595 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3931 transitions. [2023-11-19 08:06:43,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3931 transitions. [2023-11-19 08:06:43,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:43,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3931 transitions. [2023-11-19 08:06:43,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 178.6818181818182) internal successors, (3931), 22 states have internal predecessors, (3931), 0 states have call successors, (0), 0 states 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 08:06:43,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 373.0) internal successors, (8579), 23 states have internal predecessors, (8579), 0 states have call successors, (0), 0 states 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 08:06:43,612 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 373.0) internal successors, (8579), 23 states have internal predecessors, (8579), 0 states have call successors, (0), 0 states 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 08:06:43,612 INFO L175 Difference]: Start difference. First operand has 129 places, 123 transitions, 1437 flow. Second operand 22 states and 3931 transitions. [2023-11-19 08:06:43,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 427 transitions, 4543 flow [2023-11-19 08:06:43,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 427 transitions, 4453 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-11-19 08:06:43,931 INFO L231 Difference]: Finished difference. Result has 152 places, 153 transitions, 2099 flow [2023-11-19 08:06:43,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=1386, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2099, PETRI_PLACES=152, PETRI_TRANSITIONS=153} [2023-11-19 08:06:43,932 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 119 predicate places. [2023-11-19 08:06:43,932 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 153 transitions, 2099 flow [2023-11-19 08:06:43,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 170.78571428571428) internal successors, (2391), 14 states have internal predecessors, (2391), 0 states have call successors, (0), 0 states 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 08:06:43,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:43,933 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:43,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:44,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 08:06:44,144 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:06:44,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:44,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1082405096, now seen corresponding path program 11 times [2023-11-19 08:06:44,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:44,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593016446] [2023-11-19 08:06:44,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:44,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:44,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:44,401 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-19 08:06:44,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:44,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593016446] [2023-11-19 08:06:44,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593016446] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:44,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368374272] [2023-11-19 08:06:44,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 08:06:44,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:44,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:44,403 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:44,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c42bc685-9718-424b-b4d0-dcec77d93ec3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 08:06:44,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-19 08:06:44,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:06:44,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 08:06:44,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-19 08:06:44,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-19 08:06:45,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368374272] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:45,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:45,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-11-19 08:06:45,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186863248] [2023-11-19 08:06:45,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:45,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-19 08:06:45,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:45,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 08:06:45,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2023-11-19 08:06:45,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 373 [2023-11-19 08:06:45,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 153 transitions, 2099 flow. Second operand has 24 states, 24 states have (on average 153.58333333333334) internal successors, (3686), 24 states have internal predecessors, (3686), 0 states have call successors, (0), 0 states 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 08:06:45,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:45,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 373 [2023-11-19 08:06:45,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:48,088 INFO L124 PetriNetUnfolderBase]: 8081/11304 cut-off events. [2023-11-19 08:06:48,088 INFO L125 PetriNetUnfolderBase]: For 126450/126450 co-relation queries the response was YES. [2023-11-19 08:06:48,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71296 conditions, 11304 events. 8081/11304 cut-off events. For 126450/126450 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 51698 event pairs, 3178 based on Foata normal form. 152/11456 useless extension candidates. Maximal degree in co-relation 66758. Up to 7469 conditions per place. [2023-11-19 08:06:48,180 INFO L140 encePairwiseOnDemand]: 364/373 looper letters, 145 selfloop transitions, 10 changer transitions 198/353 dead transitions. [2023-11-19 08:06:48,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 353 transitions, 5083 flow [2023-11-19 08:06:48,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 08:06:48,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-19 08:06:48,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2532 transitions. [2023-11-19 08:06:48,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4242627345844504 [2023-11-19 08:06:48,185 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2532 transitions. [2023-11-19 08:06:48,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2532 transitions. [2023-11-19 08:06:48,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:48,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2532 transitions. [2023-11-19 08:06:48,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 158.25) internal successors, (2532), 16 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states 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 08:06:48,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 373.0) internal successors, (6341), 17 states have internal predecessors, (6341), 0 states have call successors, (0), 0 states 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 08:06:48,198 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 373.0) internal successors, (6341), 17 states have internal predecessors, (6341), 0 states have call successors, (0), 0 states 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 08:06:48,198 INFO L175 Difference]: Start difference. First operand has 152 places, 153 transitions, 2099 flow. Second operand 16 states and 2532 transitions. [2023-11-19 08:06:48,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 353 transitions, 5083 flow