./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-sorted.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_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/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_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/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_a730a368-fba1-4f57-89bb-4662da313fa8/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 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:54:04,851 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:54:04,964 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:54:04,971 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:54:04,972 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:54:04,998 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:54:04,999 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:54:04,999 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:54:05,000 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:54:05,001 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:54:05,002 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:54:05,002 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:54:05,003 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:54:05,004 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:54:05,004 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:54:05,005 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:54:05,005 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:54:05,006 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:54:05,007 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:54:05,007 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:54:05,008 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:54:05,009 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:54:05,009 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:54:05,010 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:54:05,010 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:54:05,011 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:54:05,011 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:54:05,012 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:54:05,012 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:54:05,013 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:54:05,013 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:54:05,014 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:54:05,014 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:54:05,015 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:54:05,015 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:54:05,015 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:54:05,016 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:54:05,016 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:54:05,017 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:54:05,017 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_a730a368-fba1-4f57-89bb-4662da313fa8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 [2023-11-19 07:54:05,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:54:05,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:54:05,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:54:05,399 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:54:05,400 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:54:05,402 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2023-11-19 07:54:08,529 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:54:08,791 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:54:08,792 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2023-11-19 07:54:08,805 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/data/6899c81ce/12716f88caf24f10a5372413d556808f/FLAGdb48a25cc [2023-11-19 07:54:08,826 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/data/6899c81ce/12716f88caf24f10a5372413d556808f [2023-11-19 07:54:08,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:54:08,837 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:54:08,839 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:54:08,840 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:54:08,845 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:54:08,849 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:54:08" (1/1) ... [2023-11-19 07:54:08,850 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e344893 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:08, skipping insertion in model container [2023-11-19 07:54:08,850 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:54:08" (1/1) ... [2023-11-19 07:54:08,880 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:54:09,166 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_a730a368-fba1-4f57-89bb-4662da313fa8/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2473,2486] [2023-11-19 07:54:09,175 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:54:09,186 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:54:09,211 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_a730a368-fba1-4f57-89bb-4662da313fa8/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2473,2486] [2023-11-19 07:54:09,215 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:54:09,232 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:54:09,232 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:09 WrapperNode [2023-11-19 07:54:09,233 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:54:09,234 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:54:09,234 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:54:09,234 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:54:09,251 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:09" (1/1) ... [2023-11-19 07:54:09,260 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:09" (1/1) ... [2023-11-19 07:54:09,299 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 108 [2023-11-19 07:54:09,301 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:54:09,302 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:54:09,303 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:54:09,303 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:54:09,315 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:09" (1/1) ... [2023-11-19 07:54:09,315 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:09" (1/1) ... [2023-11-19 07:54:09,319 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:09" (1/1) ... [2023-11-19 07:54:09,329 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:09" (1/1) ... [2023-11-19 07:54:09,341 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:09" (1/1) ... [2023-11-19 07:54:09,345 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:09" (1/1) ... [2023-11-19 07:54:09,348 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:09" (1/1) ... [2023-11-19 07:54:09,349 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:09" (1/1) ... [2023-11-19 07:54:09,353 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:54:09,359 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:54:09,359 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:54:09,359 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:54:09,360 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:09" (1/1) ... [2023-11-19 07:54:09,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:54:09,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:09,399 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:54:09,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:54:09,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:54:09,436 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:54:09,436 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:54:09,436 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:54:09,436 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:54:09,437 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 07:54:09,437 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 07:54:09,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:54:09,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:54:09,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:54:09,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:54:09,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:54:09,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:54:09,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:54:09,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:54:09,439 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:54:09,547 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:54:09,550 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:54:09,932 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:54:09,946 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:54:09,946 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 07:54:09,951 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:54:09 BoogieIcfgContainer [2023-11-19 07:54:09,951 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:54:09,954 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:54:09,954 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:54:09,958 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:54:09,958 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:54:08" (1/3) ... [2023-11-19 07:54:09,958 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d70343a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:54:09, skipping insertion in model container [2023-11-19 07:54:09,959 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:09" (2/3) ... [2023-11-19 07:54:09,959 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d70343a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:54:09, skipping insertion in model container [2023-11-19 07:54:09,959 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:54:09" (3/3) ... [2023-11-19 07:54:09,960 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2023-11-19 07:54:09,968 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:54:09,977 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:54:09,977 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:54:09,977 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:54:10,092 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 07:54:10,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 190 transitions, 401 flow [2023-11-19 07:54:10,233 INFO L124 PetriNetUnfolderBase]: 15/187 cut-off events. [2023-11-19 07:54:10,234 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:54:10,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 187 events. 15/187 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 234 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 138. Up to 2 conditions per place. [2023-11-19 07:54:10,243 INFO L82 GeneralOperation]: Start removeDead. Operand has 185 places, 190 transitions, 401 flow [2023-11-19 07:54:10,251 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 176 transitions, 370 flow [2023-11-19 07:54:10,255 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:54:10,267 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 176 transitions, 370 flow [2023-11-19 07:54:10,270 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 176 transitions, 370 flow [2023-11-19 07:54:10,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 176 transitions, 370 flow [2023-11-19 07:54:10,334 INFO L124 PetriNetUnfolderBase]: 15/176 cut-off events. [2023-11-19 07:54:10,334 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:54:10,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 176 events. 15/176 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 231 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 138. Up to 2 conditions per place. [2023-11-19 07:54:10,339 INFO L119 LiptonReduction]: Number of co-enabled transitions 4158 [2023-11-19 07:54:17,475 INFO L134 LiptonReduction]: Checked pairs total: 4781 [2023-11-19 07:54:17,476 INFO L136 LiptonReduction]: Total number of compositions: 183 [2023-11-19 07:54:17,493 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:54:17,515 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;@40e0e38c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:54:17,516 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 07:54:17,523 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:54:17,523 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-11-19 07:54:17,524 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:54:17,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:17,524 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] [2023-11-19 07:54:17,525 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 07:54:17,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:17,531 INFO L85 PathProgramCache]: Analyzing trace with hash -69762334, now seen corresponding path program 1 times [2023-11-19 07:54:17,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:17,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99525654] [2023-11-19 07:54:17,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:17,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:18,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:18,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:18,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99525654] [2023-11-19 07:54:18,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99525654] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:18,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:18,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:54:18,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047211742] [2023-11-19 07:54:18,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:18,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:54:18,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:18,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:54:18,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:54:18,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 373 [2023-11-19 07:54:18,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:18,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:18,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 373 [2023-11-19 07:54:18,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:18,452 INFO L124 PetriNetUnfolderBase]: 440/611 cut-off events. [2023-11-19 07:54:18,452 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-11-19 07:54:18,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1285 conditions, 611 events. 440/611 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1609 event pairs, 253 based on Foata normal form. 0/424 useless extension candidates. Maximal degree in co-relation 1068. Up to 611 conditions per place. [2023-11-19 07:54:18,467 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 27 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-11-19 07:54:18,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 29 transitions, 134 flow [2023-11-19 07:54:18,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:54:18,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:54:18,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 534 transitions. [2023-11-19 07:54:18,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772117962466488 [2023-11-19 07:54:18,499 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 534 transitions. [2023-11-19 07:54:18,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 534 transitions. [2023-11-19 07:54:18,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:18,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 534 transitions. [2023-11-19 07:54:18,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:18,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:18,528 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:18,530 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 3 states and 534 transitions. [2023-11-19 07:54:18,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 29 transitions, 134 flow [2023-11-19 07:54:18,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 29 transitions, 122 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-19 07:54:18,541 INFO L231 Difference]: Finished difference. Result has 29 places, 29 transitions, 74 flow [2023-11-19 07:54:18,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=29, PETRI_TRANSITIONS=29} [2023-11-19 07:54:18,548 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2023-11-19 07:54:18,548 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 29 transitions, 74 flow [2023-11-19 07:54:18,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:18,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:18,549 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 07:54:18,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:54:18,550 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 07:54:18,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:18,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1711191590, now seen corresponding path program 1 times [2023-11-19 07:54:18,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:18,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711510862] [2023-11-19 07:54:18,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:18,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:19,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:19,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711510862] [2023-11-19 07:54:19,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711510862] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:19,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:19,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:54:19,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203662044] [2023-11-19 07:54:19,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:19,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:54:19,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:19,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:54:19,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:54:19,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 373 [2023-11-19 07:54:19,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:19,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:19,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 373 [2023-11-19 07:54:19,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:19,309 INFO L124 PetriNetUnfolderBase]: 795/1127 cut-off events. [2023-11-19 07:54:19,310 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-11-19 07:54:19,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2302 conditions, 1127 events. 795/1127 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3856 event pairs, 253 based on Foata normal form. 1/827 useless extension candidates. Maximal degree in co-relation 2291. Up to 707 conditions per place. [2023-11-19 07:54:19,318 INFO L140 encePairwiseOnDemand]: 366/373 looper letters, 45 selfloop transitions, 4 changer transitions 1/50 dead transitions. [2023-11-19 07:54:19,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 50 transitions, 221 flow [2023-11-19 07:54:19,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:54:19,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:54:19,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2023-11-19 07:54:19,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49955317247542447 [2023-11-19 07:54:19,323 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2023-11-19 07:54:19,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2023-11-19 07:54:19,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:19,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2023-11-19 07:54:19,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:19,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:19,331 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:19,332 INFO L175 Difference]: Start difference. First operand has 29 places, 29 transitions, 74 flow. Second operand 3 states and 559 transitions. [2023-11-19 07:54:19,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 50 transitions, 221 flow [2023-11-19 07:54:19,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 50 transitions, 217 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:54:19,334 INFO L231 Difference]: Finished difference. Result has 31 places, 32 transitions, 100 flow [2023-11-19 07:54:19,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=31, PETRI_TRANSITIONS=32} [2023-11-19 07:54:19,336 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -1 predicate places. [2023-11-19 07:54:19,336 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 32 transitions, 100 flow [2023-11-19 07:54:19,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:19,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:19,337 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 07:54:19,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:54:19,338 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 07:54:19,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:19,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1072614148, now seen corresponding path program 1 times [2023-11-19 07:54:19,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:19,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758272739] [2023-11-19 07:54:19,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:19,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:19,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:19,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:19,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758272739] [2023-11-19 07:54:19,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758272739] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:19,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114996536] [2023-11-19 07:54:19,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:19,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:19,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:19,580 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:19,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:54:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:19,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:54:19,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:19,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:19,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:20,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114996536] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:20,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:20,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-19 07:54:20,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885447629] [2023-11-19 07:54:20,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:20,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:54:20,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:20,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:54:20,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:54:20,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 373 [2023-11-19 07:54:20,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 32 transitions, 100 flow. Second operand has 12 states, 12 states have (on average 161.66666666666666) internal successors, (1940), 12 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:20,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:20,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 373 [2023-11-19 07:54:20,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:20,936 INFO L124 PetriNetUnfolderBase]: 1497/2156 cut-off events. [2023-11-19 07:54:20,936 INFO L125 PetriNetUnfolderBase]: For 368/368 co-relation queries the response was YES. [2023-11-19 07:54:20,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5106 conditions, 2156 events. 1497/2156 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8565 event pairs, 851 based on Foata normal form. 82/1950 useless extension candidates. Maximal degree in co-relation 2700. Up to 1127 conditions per place. [2023-11-19 07:54:20,952 INFO L140 encePairwiseOnDemand]: 367/373 looper letters, 71 selfloop transitions, 6 changer transitions 0/77 dead transitions. [2023-11-19 07:54:20,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 77 transitions, 389 flow [2023-11-19 07:54:20,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:54:20,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:54:20,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1019 transitions. [2023-11-19 07:54:20,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4553172475424486 [2023-11-19 07:54:20,957 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1019 transitions. [2023-11-19 07:54:20,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1019 transitions. [2023-11-19 07:54:20,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:20,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1019 transitions. [2023-11-19 07:54:20,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 169.83333333333334) internal successors, (1019), 6 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:20,968 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 07:54:20,970 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 07:54:20,971 INFO L175 Difference]: Start difference. First operand has 31 places, 32 transitions, 100 flow. Second operand 6 states and 1019 transitions. [2023-11-19 07:54:20,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 77 transitions, 389 flow [2023-11-19 07:54:20,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 77 transitions, 380 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:54:20,975 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 142 flow [2023-11-19 07:54:20,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2023-11-19 07:54:20,976 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2023-11-19 07:54:20,977 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 142 flow [2023-11-19 07:54:20,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 161.66666666666666) internal successors, (1940), 12 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:20,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:20,979 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:21,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:21,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-19 07:54:21,192 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 07:54:21,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:21,193 INFO L85 PathProgramCache]: Analyzing trace with hash 833892620, now seen corresponding path program 2 times [2023-11-19 07:54:21,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:21,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188103081] [2023-11-19 07:54:21,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:21,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:21,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:21,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:21,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:21,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188103081] [2023-11-19 07:54:21,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188103081] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:21,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745167234] [2023-11-19 07:54:21,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:54:21,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:21,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:21,409 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:21,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:54:21,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:54:21,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:21,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:54:21,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:21,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:21,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745167234] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:21,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:54:21,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2023-11-19 07:54:21,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931310278] [2023-11-19 07:54:21,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:21,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:54:21,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:21,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:54:21,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:54:21,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 373 [2023-11-19 07:54:21,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 163.83333333333334) internal successors, (983), 6 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:21,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:21,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 373 [2023-11-19 07:54:21,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:22,227 INFO L124 PetriNetUnfolderBase]: 1468/2090 cut-off events. [2023-11-19 07:54:22,227 INFO L125 PetriNetUnfolderBase]: For 876/876 co-relation queries the response was YES. [2023-11-19 07:54:22,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5363 conditions, 2090 events. 1468/2090 cut-off events. For 876/876 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8313 event pairs, 600 based on Foata normal form. 0/1842 useless extension candidates. Maximal degree in co-relation 2699. Up to 813 conditions per place. [2023-11-19 07:54:22,244 INFO L140 encePairwiseOnDemand]: 365/373 looper letters, 78 selfloop transitions, 12 changer transitions 0/90 dead transitions. [2023-11-19 07:54:22,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 90 transitions, 488 flow [2023-11-19 07:54:22,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:54:22,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:54:22,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1203 transitions. [2023-11-19 07:54:22,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46074301034086557 [2023-11-19 07:54:22,250 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1203 transitions. [2023-11-19 07:54:22,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1203 transitions. [2023-11-19 07:54:22,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:22,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1203 transitions. [2023-11-19 07:54:22,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 171.85714285714286) internal successors, (1203), 7 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:22,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 373.0) internal successors, (2984), 8 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:22,265 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 373.0) internal successors, (2984), 8 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:22,266 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 142 flow. Second operand 7 states and 1203 transitions. [2023-11-19 07:54:22,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 90 transitions, 488 flow [2023-11-19 07:54:22,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 90 transitions, 478 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-19 07:54:22,273 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 193 flow [2023-11-19 07:54:22,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=193, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2023-11-19 07:54:22,274 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 12 predicate places. [2023-11-19 07:54:22,274 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 193 flow [2023-11-19 07:54:22,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 163.83333333333334) internal successors, (983), 6 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:22,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:22,275 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 07:54:22,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:22,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:22,497 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 07:54:22,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:22,497 INFO L85 PathProgramCache]: Analyzing trace with hash -930533305, now seen corresponding path program 1 times [2023-11-19 07:54:22,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:22,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266865815] [2023-11-19 07:54:22,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:22,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:22,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:22,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266865815] [2023-11-19 07:54:22,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266865815] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:22,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697234580] [2023-11-19 07:54:22,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:22,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:22,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:22,651 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:22,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:54:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:22,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:54:22,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:22,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:22,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697234580] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:22,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:22,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-19 07:54:22,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960348206] [2023-11-19 07:54:22,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:22,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:54:22,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:22,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:54:22,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:54:23,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 373 [2023-11-19 07:54:23,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 193 flow. Second operand has 12 states, 12 states have (on average 162.91666666666666) internal successors, (1955), 12 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:23,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:23,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 373 [2023-11-19 07:54:23,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:23,478 INFO L124 PetriNetUnfolderBase]: 1180/1708 cut-off events. [2023-11-19 07:54:23,478 INFO L125 PetriNetUnfolderBase]: For 1550/1550 co-relation queries the response was YES. [2023-11-19 07:54:23,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5002 conditions, 1708 events. 1180/1708 cut-off events. For 1550/1550 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6536 event pairs, 704 based on Foata normal form. 82/1660 useless extension candidates. Maximal degree in co-relation 3204. Up to 1061 conditions per place. [2023-11-19 07:54:23,492 INFO L140 encePairwiseOnDemand]: 366/373 looper letters, 65 selfloop transitions, 6 changer transitions 0/71 dead transitions. [2023-11-19 07:54:23,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 71 transitions, 415 flow [2023-11-19 07:54:23,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:54:23,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:54:23,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1026 transitions. [2023-11-19 07:54:23,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584450402144772 [2023-11-19 07:54:23,498 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1026 transitions. [2023-11-19 07:54:23,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1026 transitions. [2023-11-19 07:54:23,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:23,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1026 transitions. [2023-11-19 07:54:23,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:23,509 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 07:54:23,511 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 07:54:23,511 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 193 flow. Second operand 6 states and 1026 transitions. [2023-11-19 07:54:23,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 71 transitions, 415 flow [2023-11-19 07:54:23,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 71 transitions, 408 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:54:23,519 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 192 flow [2023-11-19 07:54:23,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2023-11-19 07:54:23,522 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 14 predicate places. [2023-11-19 07:54:23,522 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 192 flow [2023-11-19 07:54:23,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 162.91666666666666) internal successors, (1955), 12 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:23,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:23,524 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 07:54:23,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:23,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:23,746 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 07:54:23,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:23,746 INFO L85 PathProgramCache]: Analyzing trace with hash -2018482001, now seen corresponding path program 1 times [2023-11-19 07:54:23,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:23,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208532220] [2023-11-19 07:54:23,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:23,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:23,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:23,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:23,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:23,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208532220] [2023-11-19 07:54:23,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208532220] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:23,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787195898] [2023-11-19 07:54:23,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:23,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:23,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:23,940 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:23,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:54:24,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:24,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:54:24,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:24,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:24,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:24,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:24,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787195898] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:24,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:24,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-19 07:54:24,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102633629] [2023-11-19 07:54:24,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:24,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:54:24,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:24,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:54:24,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:54:24,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 373 [2023-11-19 07:54:24,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 192 flow. Second operand has 13 states, 13 states have (on average 161.15384615384616) internal successors, (2095), 13 states have internal predecessors, (2095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:24,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:24,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 373 [2023-11-19 07:54:24,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:24,945 INFO L124 PetriNetUnfolderBase]: 904/1304 cut-off events. [2023-11-19 07:54:24,945 INFO L125 PetriNetUnfolderBase]: For 1568/1568 co-relation queries the response was YES. [2023-11-19 07:54:24,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4039 conditions, 1304 events. 904/1304 cut-off events. For 1568/1568 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4589 event pairs, 548 based on Foata normal form. 0/1234 useless extension candidates. Maximal degree in co-relation 3281. Up to 1061 conditions per place. [2023-11-19 07:54:24,956 INFO L140 encePairwiseOnDemand]: 367/373 looper letters, 32 selfloop transitions, 3 changer transitions 27/62 dead transitions. [2023-11-19 07:54:24,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 62 transitions, 386 flow [2023-11-19 07:54:24,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:54:24,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:54:24,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1006 transitions. [2023-11-19 07:54:24,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4495084897229669 [2023-11-19 07:54:24,962 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1006 transitions. [2023-11-19 07:54:24,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1006 transitions. [2023-11-19 07:54:24,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:24,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1006 transitions. [2023-11-19 07:54:24,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 167.66666666666666) internal successors, (1006), 6 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:24,971 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 07:54:24,972 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 07:54:24,973 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 192 flow. Second operand 6 states and 1006 transitions. [2023-11-19 07:54:24,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 62 transitions, 386 flow [2023-11-19 07:54:24,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 62 transitions, 365 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-19 07:54:24,979 INFO L231 Difference]: Finished difference. Result has 49 places, 35 transitions, 156 flow [2023-11-19 07:54:24,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=49, PETRI_TRANSITIONS=35} [2023-11-19 07:54:24,981 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2023-11-19 07:54:24,981 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 35 transitions, 156 flow [2023-11-19 07:54:24,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 161.15384615384616) internal successors, (2095), 13 states have internal predecessors, (2095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:24,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:24,983 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:25,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:25,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:25,204 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 07:54:25,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:25,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1805887645, now seen corresponding path program 2 times [2023-11-19 07:54:25,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:25,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439424724] [2023-11-19 07:54:25,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:25,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:25,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:25,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:25,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439424724] [2023-11-19 07:54:25,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439424724] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:25,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061708001] [2023-11-19 07:54:25,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:54:25,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:25,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:25,394 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:25,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:54:25,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:54:25,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:25,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:54:25,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:25,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:25,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:25,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:25,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061708001] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:25,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:25,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-19 07:54:25,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210529359] [2023-11-19 07:54:25,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:25,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:54:25,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:25,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:54:25,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:54:26,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 373 [2023-11-19 07:54:26,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 35 transitions, 156 flow. Second operand has 16 states, 16 states have (on average 155.625) internal successors, (2490), 16 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:26,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:26,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 373 [2023-11-19 07:54:26,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:26,839 INFO L124 PetriNetUnfolderBase]: 1137/1571 cut-off events. [2023-11-19 07:54:26,839 INFO L125 PetriNetUnfolderBase]: For 1969/1969 co-relation queries the response was YES. [2023-11-19 07:54:26,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5067 conditions, 1571 events. 1137/1571 cut-off events. For 1969/1969 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5601 event pairs, 310 based on Foata normal form. 16/1479 useless extension candidates. Maximal degree in co-relation 5043. Up to 853 conditions per place. [2023-11-19 07:54:26,853 INFO L140 encePairwiseOnDemand]: 363/373 looper letters, 79 selfloop transitions, 12 changer transitions 0/91 dead transitions. [2023-11-19 07:54:26,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 91 transitions, 594 flow [2023-11-19 07:54:26,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:54:26,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-19 07:54:26,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1453 transitions. [2023-11-19 07:54:26,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43282692880548107 [2023-11-19 07:54:26,861 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1453 transitions. [2023-11-19 07:54:26,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1453 transitions. [2023-11-19 07:54:26,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:26,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1453 transitions. [2023-11-19 07:54:26,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 161.44444444444446) internal successors, (1453), 9 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:26,875 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 07:54:26,876 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 07:54:26,876 INFO L175 Difference]: Start difference. First operand has 49 places, 35 transitions, 156 flow. Second operand 9 states and 1453 transitions. [2023-11-19 07:54:26,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 91 transitions, 594 flow [2023-11-19 07:54:26,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 91 transitions, 530 flow, removed 29 selfloop flow, removed 8 redundant places. [2023-11-19 07:54:26,886 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 200 flow [2023-11-19 07:54:26,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=200, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2023-11-19 07:54:26,887 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 14 predicate places. [2023-11-19 07:54:26,888 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 200 flow [2023-11-19 07:54:26,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 155.625) internal successors, (2490), 16 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:26,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:26,892 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:26,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:27,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:27,113 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 07:54:27,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:27,113 INFO L85 PathProgramCache]: Analyzing trace with hash -2061899769, now seen corresponding path program 3 times [2023-11-19 07:54:27,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:27,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115217058] [2023-11-19 07:54:27,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:27,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:27,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:27,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115217058] [2023-11-19 07:54:27,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115217058] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:27,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745414463] [2023-11-19 07:54:27,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:54:27,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:27,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:27,356 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:27,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:54:27,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:54:27,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:27,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:54:27,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:27,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:27,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:27,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745414463] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:27,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:54:27,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2023-11-19 07:54:27,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310900644] [2023-11-19 07:54:27,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:27,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:54:27,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:27,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:54:27,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:54:27,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 373 [2023-11-19 07:54:27,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 200 flow. Second operand has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:27,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:27,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 373 [2023-11-19 07:54:27,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:28,375 INFO L124 PetriNetUnfolderBase]: 1581/2177 cut-off events. [2023-11-19 07:54:28,375 INFO L125 PetriNetUnfolderBase]: For 2911/2911 co-relation queries the response was YES. [2023-11-19 07:54:28,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7218 conditions, 2177 events. 1581/2177 cut-off events. For 2911/2911 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 7998 event pairs, 365 based on Foata normal form. 14/2191 useless extension candidates. Maximal degree in co-relation 7186. Up to 1030 conditions per place. [2023-11-19 07:54:28,395 INFO L140 encePairwiseOnDemand]: 363/373 looper letters, 104 selfloop transitions, 28 changer transitions 0/132 dead transitions. [2023-11-19 07:54:28,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 132 transitions, 893 flow [2023-11-19 07:54:28,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:54:28,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 07:54:28,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1628 transitions. [2023-11-19 07:54:28,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4364611260053619 [2023-11-19 07:54:28,403 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1628 transitions. [2023-11-19 07:54:28,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1628 transitions. [2023-11-19 07:54:28,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:28,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1628 transitions. [2023-11-19 07:54:28,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 162.8) internal successors, (1628), 10 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:28,416 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 07:54:28,418 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 07:54:28,418 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 200 flow. Second operand 10 states and 1628 transitions. [2023-11-19 07:54:28,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 132 transitions, 893 flow [2023-11-19 07:54:28,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 132 transitions, 870 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-19 07:54:28,425 INFO L231 Difference]: Finished difference. Result has 55 places, 58 transitions, 373 flow [2023-11-19 07:54:28,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=373, PETRI_PLACES=55, PETRI_TRANSITIONS=58} [2023-11-19 07:54:28,426 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 23 predicate places. [2023-11-19 07:54:28,426 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 58 transitions, 373 flow [2023-11-19 07:54:28,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:28,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:28,427 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:28,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:28,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:28,645 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 07:54:28,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:28,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1338740991, now seen corresponding path program 4 times [2023-11-19 07:54:28,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:28,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082129145] [2023-11-19 07:54:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:28,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:28,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:28,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082129145] [2023-11-19 07:54:28,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082129145] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:28,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736351608] [2023-11-19 07:54:28,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:54:28,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:28,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:28,842 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:28,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:54:28,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:54:28,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:28,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:54:28,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:29,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:29,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:29,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:29,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736351608] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:29,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:29,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-19 07:54:29,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806124191] [2023-11-19 07:54:29,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:29,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:54:29,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:29,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:54:29,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:54:29,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 373 [2023-11-19 07:54:29,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 58 transitions, 373 flow. Second operand has 17 states, 17 states have (on average 156.11764705882354) internal successors, (2654), 17 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:29,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:29,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 373 [2023-11-19 07:54:29,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:30,642 INFO L124 PetriNetUnfolderBase]: 2046/2816 cut-off events. [2023-11-19 07:54:30,642 INFO L125 PetriNetUnfolderBase]: For 6621/6621 co-relation queries the response was YES. [2023-11-19 07:54:30,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11300 conditions, 2816 events. 2046/2816 cut-off events. For 6621/6621 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 10923 event pairs, 527 based on Foata normal form. 16/2832 useless extension candidates. Maximal degree in co-relation 11264. Up to 1672 conditions per place. [2023-11-19 07:54:30,670 INFO L140 encePairwiseOnDemand]: 361/373 looper letters, 121 selfloop transitions, 52 changer transitions 0/173 dead transitions. [2023-11-19 07:54:30,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 173 transitions, 1369 flow [2023-11-19 07:54:30,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:54:30,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:54:30,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1952 transitions. [2023-11-19 07:54:30,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361036639857015 [2023-11-19 07:54:30,679 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1952 transitions. [2023-11-19 07:54:30,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1952 transitions. [2023-11-19 07:54:30,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:30,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1952 transitions. [2023-11-19 07:54:30,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 162.66666666666666) internal successors, (1952), 12 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:30,695 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 07:54:30,697 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 07:54:30,697 INFO L175 Difference]: Start difference. First operand has 55 places, 58 transitions, 373 flow. Second operand 12 states and 1952 transitions. [2023-11-19 07:54:30,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 173 transitions, 1369 flow [2023-11-19 07:54:30,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 173 transitions, 1308 flow, removed 28 selfloop flow, removed 3 redundant places. [2023-11-19 07:54:30,722 INFO L231 Difference]: Finished difference. Result has 68 places, 92 transitions, 794 flow [2023-11-19 07:54:30,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=794, PETRI_PLACES=68, PETRI_TRANSITIONS=92} [2023-11-19 07:54:30,723 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 36 predicate places. [2023-11-19 07:54:30,723 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 92 transitions, 794 flow [2023-11-19 07:54:30,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 156.11764705882354) internal successors, (2654), 17 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:30,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:30,725 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:30,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:30,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:30,941 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 07:54:30,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:30,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1419466781, now seen corresponding path program 5 times [2023-11-19 07:54:30,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:30,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889660296] [2023-11-19 07:54:30,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:30,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:31,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:31,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889660296] [2023-11-19 07:54:31,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889660296] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:31,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415141012] [2023-11-19 07:54:31,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:54:31,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:31,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:31,116 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:31,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:54:31,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:54:31,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:31,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:54:31,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:31,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:54:31,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:31,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:54:31,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415141012] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:31,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:31,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-19 07:54:31,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319720943] [2023-11-19 07:54:31,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:31,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:54:31,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:31,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:54:31,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:54:31,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 373 [2023-11-19 07:54:31,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 92 transitions, 794 flow. Second operand has 14 states, 14 states have (on average 150.78571428571428) internal successors, (2111), 14 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:31,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:31,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 373 [2023-11-19 07:54:31,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:33,305 INFO L124 PetriNetUnfolderBase]: 2102/2900 cut-off events. [2023-11-19 07:54:33,305 INFO L125 PetriNetUnfolderBase]: For 10453/10453 co-relation queries the response was YES. [2023-11-19 07:54:33,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13591 conditions, 2900 events. 2102/2900 cut-off events. For 10453/10453 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11605 event pairs, 141 based on Foata normal form. 16/2916 useless extension candidates. Maximal degree in co-relation 13548. Up to 1091 conditions per place. [2023-11-19 07:54:33,331 INFO L140 encePairwiseOnDemand]: 359/373 looper letters, 171 selfloop transitions, 148 changer transitions 0/319 dead transitions. [2023-11-19 07:54:33,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 319 transitions, 3038 flow [2023-11-19 07:54:33,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-19 07:54:33,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-19 07:54:33,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3597 transitions. [2023-11-19 07:54:33,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41927963632124954 [2023-11-19 07:54:33,346 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3597 transitions. [2023-11-19 07:54:33,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3597 transitions. [2023-11-19 07:54:33,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:33,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3597 transitions. [2023-11-19 07:54:33,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 156.3913043478261) internal successors, (3597), 23 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:33,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 373.0) internal successors, (8952), 24 states have internal predecessors, (8952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:33,376 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 373.0) internal successors, (8952), 24 states have internal predecessors, (8952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:33,376 INFO L175 Difference]: Start difference. First operand has 68 places, 92 transitions, 794 flow. Second operand 23 states and 3597 transitions. [2023-11-19 07:54:33,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 319 transitions, 3038 flow [2023-11-19 07:54:33,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 319 transitions, 2911 flow, removed 32 selfloop flow, removed 5 redundant places. [2023-11-19 07:54:33,431 INFO L231 Difference]: Finished difference. Result has 91 places, 192 transitions, 2073 flow [2023-11-19 07:54:33,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2073, PETRI_PLACES=91, PETRI_TRANSITIONS=192} [2023-11-19 07:54:33,433 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 59 predicate places. [2023-11-19 07:54:33,433 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 192 transitions, 2073 flow [2023-11-19 07:54:33,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 150.78571428571428) internal successors, (2111), 14 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:33,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:33,434 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:33,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:33,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:54:33,654 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 07:54:33,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:33,654 INFO L85 PathProgramCache]: Analyzing trace with hash -2062953221, now seen corresponding path program 6 times [2023-11-19 07:54:33,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:33,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235114179] [2023-11-19 07:54:33,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:33,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:33,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:33,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:33,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235114179] [2023-11-19 07:54:33,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235114179] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:33,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159353184] [2023-11-19 07:54:33,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:54:33,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:33,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:33,858 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:33,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:54:33,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-19 07:54:33,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:33,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:54:33,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:34,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:34,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:34,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159353184] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:34,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:54:34,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 17 [2023-11-19 07:54:34,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676367171] [2023-11-19 07:54:34,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:34,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:54:34,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:34,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:54:34,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:54:34,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 373 [2023-11-19 07:54:34,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 192 transitions, 2073 flow. Second operand has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:34,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:34,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 373 [2023-11-19 07:54:34,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:35,139 INFO L124 PetriNetUnfolderBase]: 2080/2860 cut-off events. [2023-11-19 07:54:35,140 INFO L125 PetriNetUnfolderBase]: For 11321/11321 co-relation queries the response was YES. [2023-11-19 07:54:35,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14737 conditions, 2860 events. 2080/2860 cut-off events. For 11321/11321 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 11148 event pairs, 357 based on Foata normal form. 14/2874 useless extension candidates. Maximal degree in co-relation 14687. Up to 1480 conditions per place. [2023-11-19 07:54:35,166 INFO L140 encePairwiseOnDemand]: 363/373 looper letters, 192 selfloop transitions, 81 changer transitions 0/273 dead transitions. [2023-11-19 07:54:35,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 273 transitions, 3085 flow [2023-11-19 07:54:35,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:54:35,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 07:54:35,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1630 transitions. [2023-11-19 07:54:35,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43699731903485256 [2023-11-19 07:54:35,173 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1630 transitions. [2023-11-19 07:54:35,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1630 transitions. [2023-11-19 07:54:35,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:35,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1630 transitions. [2023-11-19 07:54:35,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 163.0) internal successors, (1630), 10 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:35,186 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 07:54:35,187 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 07:54:35,187 INFO L175 Difference]: Start difference. First operand has 91 places, 192 transitions, 2073 flow. Second operand 10 states and 1630 transitions. [2023-11-19 07:54:35,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 273 transitions, 3085 flow [2023-11-19 07:54:35,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 273 transitions, 2994 flow, removed 42 selfloop flow, removed 4 redundant places. [2023-11-19 07:54:35,274 INFO L231 Difference]: Finished difference. Result has 95 places, 191 transitions, 2134 flow [2023-11-19 07:54:35,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=1972, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2134, PETRI_PLACES=95, PETRI_TRANSITIONS=191} [2023-11-19 07:54:35,276 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 63 predicate places. [2023-11-19 07:54:35,276 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 191 transitions, 2134 flow [2023-11-19 07:54:35,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:35,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:35,277 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:35,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:35,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 07:54:35,488 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 07:54:35,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:35,489 INFO L85 PathProgramCache]: Analyzing trace with hash 564160127, now seen corresponding path program 7 times [2023-11-19 07:54:35,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:35,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423568685] [2023-11-19 07:54:35,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:35,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:35,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:35,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423568685] [2023-11-19 07:54:35,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423568685] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:35,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830390121] [2023-11-19 07:54:35,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:54:35,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:35,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:35,667 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:35,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:54:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:35,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:54:35,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:35,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:35,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:36,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830390121] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:36,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:54:36,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 17 [2023-11-19 07:54:36,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644452473] [2023-11-19 07:54:36,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:36,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:54:36,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:36,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:54:36,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:54:36,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 373 [2023-11-19 07:54:36,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 191 transitions, 2134 flow. Second operand has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:36,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:36,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 373 [2023-11-19 07:54:36,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:36,830 INFO L124 PetriNetUnfolderBase]: 2058/2820 cut-off events. [2023-11-19 07:54:36,830 INFO L125 PetriNetUnfolderBase]: For 12390/12390 co-relation queries the response was YES. [2023-11-19 07:54:36,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15017 conditions, 2820 events. 2058/2820 cut-off events. For 12390/12390 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 10913 event pairs, 303 based on Foata normal form. 14/2834 useless extension candidates. Maximal degree in co-relation 14967. Up to 1134 conditions per place. [2023-11-19 07:54:36,857 INFO L140 encePairwiseOnDemand]: 363/373 looper letters, 129 selfloop transitions, 114 changer transitions 0/243 dead transitions. [2023-11-19 07:54:36,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 243 transitions, 2860 flow [2023-11-19 07:54:36,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:54:36,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-19 07:54:36,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1467 transitions. [2023-11-19 07:54:36,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43699731903485256 [2023-11-19 07:54:36,863 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1467 transitions. [2023-11-19 07:54:36,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1467 transitions. [2023-11-19 07:54:36,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:36,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1467 transitions. [2023-11-19 07:54:36,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 163.0) internal successors, (1467), 9 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:36,874 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 07:54:36,876 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 07:54:36,876 INFO L175 Difference]: Start difference. First operand has 95 places, 191 transitions, 2134 flow. Second operand 9 states and 1467 transitions. [2023-11-19 07:54:36,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 243 transitions, 2860 flow [2023-11-19 07:54:36,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 243 transitions, 2822 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-11-19 07:54:36,963 INFO L231 Difference]: Finished difference. Result has 97 places, 187 transitions, 2281 flow [2023-11-19 07:54:36,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=2053, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2281, PETRI_PLACES=97, PETRI_TRANSITIONS=187} [2023-11-19 07:54:36,964 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 65 predicate places. [2023-11-19 07:54:36,965 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 187 transitions, 2281 flow [2023-11-19 07:54:36,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:36,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:36,965 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:36,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:37,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 07:54:37,180 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 07:54:37,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:37,181 INFO L85 PathProgramCache]: Analyzing trace with hash 329271091, now seen corresponding path program 1 times [2023-11-19 07:54:37,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:37,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840626094] [2023-11-19 07:54:37,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:37,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:37,298 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 07:54:37,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:37,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840626094] [2023-11-19 07:54:37,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840626094] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:37,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:37,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:54:37,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529243577] [2023-11-19 07:54:37,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:37,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:54:37,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:37,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:54:37,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:54:37,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 373 [2023-11-19 07:54:37,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 187 transitions, 2281 flow. Second operand has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:37,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:37,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 373 [2023-11-19 07:54:37,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:37,785 INFO L124 PetriNetUnfolderBase]: 2170/2998 cut-off events. [2023-11-19 07:54:37,785 INFO L125 PetriNetUnfolderBase]: For 18656/18656 co-relation queries the response was YES. [2023-11-19 07:54:37,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16730 conditions, 2998 events. 2170/2998 cut-off events. For 18656/18656 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12031 event pairs, 556 based on Foata normal form. 66/3064 useless extension candidates. Maximal degree in co-relation 16679. Up to 1883 conditions per place. [2023-11-19 07:54:37,813 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 276 selfloop transitions, 3 changer transitions 0/279 dead transitions. [2023-11-19 07:54:37,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 279 transitions, 4001 flow [2023-11-19 07:54:37,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:54:37,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:54:37,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2023-11-19 07:54:37,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5004468275245755 [2023-11-19 07:54:37,815 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2023-11-19 07:54:37,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2023-11-19 07:54:37,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:37,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2023-11-19 07:54:37,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:37,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:37,820 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:37,820 INFO L175 Difference]: Start difference. First operand has 97 places, 187 transitions, 2281 flow. Second operand 3 states and 560 transitions. [2023-11-19 07:54:37,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 279 transitions, 4001 flow [2023-11-19 07:54:37,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 279 transitions, 3875 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-19 07:54:37,965 INFO L231 Difference]: Finished difference. Result has 95 places, 187 transitions, 2206 flow [2023-11-19 07:54:37,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=2188, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2206, PETRI_PLACES=95, PETRI_TRANSITIONS=187} [2023-11-19 07:54:37,967 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 63 predicate places. [2023-11-19 07:54:37,967 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 187 transitions, 2206 flow [2023-11-19 07:54:37,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:37,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:37,967 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:37,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 07:54:37,968 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 07:54:37,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:37,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1566334411, now seen corresponding path program 1 times [2023-11-19 07:54:37,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:37,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930686220] [2023-11-19 07:54:37,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:37,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:38,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:39,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:54:39,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:39,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930686220] [2023-11-19 07:54:39,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930686220] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:39,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014530682] [2023-11-19 07:54:39,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:39,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:39,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:39,706 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:39,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730a368-fba1-4f57-89bb-4662da313fa8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:54:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:39,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-19 07:54:39,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:40,408 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:54:40,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 32 [2023-11-19 07:54:40,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:40,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:41,382 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:54:41,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 73 [2023-11-19 07:54:41,481 INFO L349 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2023-11-19 07:54:41,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 1 [2023-11-19 07:54:41,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:54:41,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014530682] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:41,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:41,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 27 [2023-11-19 07:54:41,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969936735] [2023-11-19 07:54:41,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:41,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-19 07:54:41,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:41,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-19 07:54:41,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2023-11-19 07:54:44,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 373 [2023-11-19 07:54:44,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 187 transitions, 2206 flow. Second operand has 28 states, 28 states have (on average 136.57142857142858) internal successors, (3824), 28 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:44,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:44,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 373 [2023-11-19 07:54:44,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand