./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.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_58f85641-04a7-4ef1-8616-68ea24a8a5d9/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f85641-04a7-4ef1-8616-68ea24a8a5d9/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_58f85641-04a7-4ef1-8616-68ea24a8a5d9/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f85641-04a7-4ef1-8616-68ea24a8a5d9/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f85641-04a7-4ef1-8616-68ea24a8a5d9/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_58f85641-04a7-4ef1-8616-68ea24a8a5d9/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 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:37:29,163 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:37:29,280 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f85641-04a7-4ef1-8616-68ea24a8a5d9/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:37:29,287 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:37:29,288 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:37:29,325 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:37:29,326 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:37:29,327 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:37:29,328 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:37:29,333 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:37:29,333 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:37:29,334 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:37:29,334 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:37:29,336 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:37:29,337 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:37:29,337 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:37:29,337 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:37:29,338 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:37:29,338 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:37:29,339 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:37:29,339 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:37:29,340 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:37:29,340 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:37:29,341 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:37:29,341 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:37:29,342 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:37:29,342 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:37:29,343 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:37:29,343 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:37:29,344 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:37:29,345 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:37:29,345 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:37:29,346 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:37:29,346 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:37:29,346 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:37:29,347 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:37:29,347 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:37:29,347 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:37:29,347 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:37:29,348 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_58f85641-04a7-4ef1-8616-68ea24a8a5d9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f85641-04a7-4ef1-8616-68ea24a8a5d9/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 [2023-11-19 07:37:29,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:37:29,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:37:29,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:37:29,704 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:37:29,704 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:37:29,706 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f85641-04a7-4ef1-8616-68ea24a8a5d9/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2023-11-19 07:37:32,784 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:37:33,072 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:37:33,072 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f85641-04a7-4ef1-8616-68ea24a8a5d9/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2023-11-19 07:37:33,083 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f85641-04a7-4ef1-8616-68ea24a8a5d9/bin/uautomizer-verify-uCwYo4JHxu/data/48a9f825c/1fa4c95fbede423baab4c0e00408a004/FLAGb2d4e494f [2023-11-19 07:37:33,107 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f85641-04a7-4ef1-8616-68ea24a8a5d9/bin/uautomizer-verify-uCwYo4JHxu/data/48a9f825c/1fa4c95fbede423baab4c0e00408a004 [2023-11-19 07:37:33,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:37:33,116 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:37:33,118 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:37:33,118 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:37:33,124 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:37:33,124 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:37:33" (1/1) ... [2023-11-19 07:37:33,126 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76cf80ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:33, skipping insertion in model container [2023-11-19 07:37:33,126 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:37:33" (1/1) ... [2023-11-19 07:37:33,164 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:37:33,378 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_58f85641-04a7-4ef1-8616-68ea24a8a5d9/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[4284,4297] [2023-11-19 07:37:33,393 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:37:33,405 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:37:33,442 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_58f85641-04a7-4ef1-8616-68ea24a8a5d9/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[4284,4297] [2023-11-19 07:37:33,447 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:37:33,458 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:37:33,458 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:37:33,467 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:37:33,468 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:33 WrapperNode [2023-11-19 07:37:33,468 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:37:33,470 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:37:33,470 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:37:33,470 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:37:33,479 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:33" (1/1) ... [2023-11-19 07:37:33,490 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:33" (1/1) ... [2023-11-19 07:37:33,547 INFO L138 Inliner]: procedures = 27, calls = 83, calls flagged for inlining = 22, calls inlined = 28, statements flattened = 360 [2023-11-19 07:37:33,547 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:37:33,548 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:37:33,549 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:37:33,549 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:37:33,559 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:33" (1/1) ... [2023-11-19 07:37:33,560 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:33" (1/1) ... [2023-11-19 07:37:33,565 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:33" (1/1) ... [2023-11-19 07:37:33,566 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:33" (1/1) ... [2023-11-19 07:37:33,580 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:33" (1/1) ... [2023-11-19 07:37:33,586 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:33" (1/1) ... [2023-11-19 07:37:33,590 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:33" (1/1) ... [2023-11-19 07:37:33,592 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:33" (1/1) ... [2023-11-19 07:37:33,598 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:37:33,599 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:37:33,599 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:37:33,599 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:37:33,600 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:33" (1/1) ... [2023-11-19 07:37:33,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:37:33,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f85641-04a7-4ef1-8616-68ea24a8a5d9/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:33,636 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f85641-04a7-4ef1-8616-68ea24a8a5d9/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:37:33,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f85641-04a7-4ef1-8616-68ea24a8a5d9/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:37:33,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:37:33,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:37:33,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:37:33,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:37:33,683 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:37:33,683 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:37:33,684 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:37:33,684 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:37:33,684 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 07:37:33,684 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 07:37:33,684 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-19 07:37:33,684 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-19 07:37:33,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:37:33,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:37:33,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:37:33,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:37:33,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:37:33,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:37:33,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:37:33,688 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 07:37:33,816 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:37:33,818 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:37:34,399 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:37:34,827 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:37:34,827 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-19 07:37:34,838 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:37:34 BoogieIcfgContainer [2023-11-19 07:37:34,838 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:37:34,842 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:37:34,843 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:37:34,847 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:37:34,847 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:37:33" (1/3) ... [2023-11-19 07:37:34,848 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49dc49e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:37:34, skipping insertion in model container [2023-11-19 07:37:34,849 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:33" (2/3) ... [2023-11-19 07:37:34,851 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49dc49e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:37:34, skipping insertion in model container [2023-11-19 07:37:34,851 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:37:34" (3/3) ... [2023-11-19 07:37:34,852 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series2.wvr.c [2023-11-19 07:37:34,862 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:37:34,874 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:37:34,874 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:37:34,874 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:37:35,001 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-19 07:37:35,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 267 places, 276 transitions, 580 flow [2023-11-19 07:37:35,189 INFO L124 PetriNetUnfolderBase]: 22/272 cut-off events. [2023-11-19 07:37:35,189 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:37:35,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 272 events. 22/272 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 138 event pairs, 0 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 232. Up to 2 conditions per place. [2023-11-19 07:37:35,198 INFO L82 GeneralOperation]: Start removeDead. Operand has 267 places, 276 transitions, 580 flow [2023-11-19 07:37:35,213 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 250 places, 259 transitions, 542 flow [2023-11-19 07:37:35,218 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:37:35,229 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 250 places, 259 transitions, 542 flow [2023-11-19 07:37:35,233 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 250 places, 259 transitions, 542 flow [2023-11-19 07:37:35,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 250 places, 259 transitions, 542 flow [2023-11-19 07:37:35,305 INFO L124 PetriNetUnfolderBase]: 22/259 cut-off events. [2023-11-19 07:37:35,305 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:37:35,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 259 events. 22/259 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 136 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 232. Up to 2 conditions per place. [2023-11-19 07:37:35,312 INFO L119 LiptonReduction]: Number of co-enabled transitions 2160 [2023-11-19 07:37:46,833 INFO L134 LiptonReduction]: Checked pairs total: 3267 [2023-11-19 07:37:46,833 INFO L136 LiptonReduction]: Total number of compositions: 265 [2023-11-19 07:37:46,863 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:37:46,869 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;@42b5913f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:37:46,869 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-19 07:37:46,883 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:37:46,883 INFO L124 PetriNetUnfolderBase]: 7/36 cut-off events. [2023-11-19 07:37:46,883 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:37:46,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:46,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:46,885 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 2 more)] === [2023-11-19 07:37:46,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:46,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1198912214, now seen corresponding path program 1 times [2023-11-19 07:37:46,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:46,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483656863] [2023-11-19 07:37:46,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:46,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:47,470 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 07:37:47,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:47,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483656863] [2023-11-19 07:37:47,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483656863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:47,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:47,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:37:47,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772669599] [2023-11-19 07:37:47,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:47,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:47,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:47,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:47,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:47,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 541 [2023-11-19 07:37:47,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:47,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:47,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 541 [2023-11-19 07:37:47,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:48,096 INFO L124 PetriNetUnfolderBase]: 2056/2833 cut-off events. [2023-11-19 07:37:48,096 INFO L125 PetriNetUnfolderBase]: For 255/255 co-relation queries the response was YES. [2023-11-19 07:37:48,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5675 conditions, 2833 events. 2056/2833 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10697 event pairs, 624 based on Foata normal form. 1/2073 useless extension candidates. Maximal degree in co-relation 4278. Up to 1506 conditions per place. [2023-11-19 07:37:48,128 INFO L140 encePairwiseOnDemand]: 537/541 looper letters, 53 selfloop transitions, 3 changer transitions 1/59 dead transitions. [2023-11-19 07:37:48,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 59 transitions, 271 flow [2023-11-19 07:37:48,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:48,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:37:48,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 799 transitions. [2023-11-19 07:37:48,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.492298213185459 [2023-11-19 07:37:48,157 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 799 transitions. [2023-11-19 07:37:48,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 799 transitions. [2023-11-19 07:37:48,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:48,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 799 transitions. [2023-11-19 07:37:48,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.3333333333333) internal successors, (799), 3 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:48,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:48,181 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:48,183 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 98 flow. Second operand 3 states and 799 transitions. [2023-11-19 07:37:48,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 59 transitions, 271 flow [2023-11-19 07:37:48,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 59 transitions, 245 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-19 07:37:48,193 INFO L231 Difference]: Finished difference. Result has 38 places, 39 transitions, 101 flow [2023-11-19 07:37:48,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=38, PETRI_TRANSITIONS=39} [2023-11-19 07:37:48,199 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -5 predicate places. [2023-11-19 07:37:48,199 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 39 transitions, 101 flow [2023-11-19 07:37:48,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:48,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:48,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:48,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:37:48,201 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 2 more)] === [2023-11-19 07:37:48,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:48,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1422026166, now seen corresponding path program 1 times [2023-11-19 07:37:48,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:48,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014449811] [2023-11-19 07:37:48,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:48,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:48,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:48,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014449811] [2023-11-19 07:37:48,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014449811] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:48,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:48,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:37:48,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997511862] [2023-11-19 07:37:48,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:48,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:48,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:48,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:48,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:48,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 541 [2023-11-19 07:37:48,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:48,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:48,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 541 [2023-11-19 07:37:48,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:49,245 INFO L124 PetriNetUnfolderBase]: 2923/4011 cut-off events. [2023-11-19 07:37:49,245 INFO L125 PetriNetUnfolderBase]: For 603/603 co-relation queries the response was YES. [2023-11-19 07:37:49,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8722 conditions, 4011 events. 2923/4011 cut-off events. For 603/603 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16449 event pairs, 1103 based on Foata normal form. 148/3592 useless extension candidates. Maximal degree in co-relation 3962. Up to 2181 conditions per place. [2023-11-19 07:37:49,277 INFO L140 encePairwiseOnDemand]: 538/541 looper letters, 61 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-11-19 07:37:49,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 65 transitions, 293 flow [2023-11-19 07:37:49,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:49,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:37:49,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 793 transitions. [2023-11-19 07:37:49,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48860135551447936 [2023-11-19 07:37:49,282 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 793 transitions. [2023-11-19 07:37:49,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 793 transitions. [2023-11-19 07:37:49,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:49,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 793 transitions. [2023-11-19 07:37:49,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:49,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:49,293 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:49,293 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 101 flow. Second operand 3 states and 793 transitions. [2023-11-19 07:37:49,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 65 transitions, 293 flow [2023-11-19 07:37:49,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 65 transitions, 289 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:37:49,296 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 112 flow [2023-11-19 07:37:49,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2023-11-19 07:37:49,298 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2023-11-19 07:37:49,298 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 112 flow [2023-11-19 07:37:49,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:49,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:49,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:49,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:37:49,300 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 2 more)] === [2023-11-19 07:37:49,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:49,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1652463071, now seen corresponding path program 1 times [2023-11-19 07:37:49,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:49,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207935744] [2023-11-19 07:37:49,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:49,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:49,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:49,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:49,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:49,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207935744] [2023-11-19 07:37:49,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207935744] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:49,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:49,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:37:49,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487407950] [2023-11-19 07:37:49,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:49,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:49,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:49,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:49,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:49,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 541 [2023-11-19 07:37:49,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:49,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:49,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 541 [2023-11-19 07:37:49,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:50,262 INFO L124 PetriNetUnfolderBase]: 3885/5397 cut-off events. [2023-11-19 07:37:50,262 INFO L125 PetriNetUnfolderBase]: For 1591/1591 co-relation queries the response was YES. [2023-11-19 07:37:50,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12132 conditions, 5397 events. 3885/5397 cut-off events. For 1591/1591 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 23869 event pairs, 1580 based on Foata normal form. 184/5050 useless extension candidates. Maximal degree in co-relation 7030. Up to 2883 conditions per place. [2023-11-19 07:37:50,301 INFO L140 encePairwiseOnDemand]: 538/541 looper letters, 61 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-11-19 07:37:50,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 65 transitions, 309 flow [2023-11-19 07:37:50,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:50,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:37:50,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 791 transitions. [2023-11-19 07:37:50,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48736906962415283 [2023-11-19 07:37:50,305 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 791 transitions. [2023-11-19 07:37:50,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 791 transitions. [2023-11-19 07:37:50,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:50,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 791 transitions. [2023-11-19 07:37:50,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 263.6666666666667) internal successors, (791), 3 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:50,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:50,316 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:50,316 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 112 flow. Second operand 3 states and 791 transitions. [2023-11-19 07:37:50,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 65 transitions, 309 flow [2023-11-19 07:37:50,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 65 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:37:50,319 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 124 flow [2023-11-19 07:37:50,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2023-11-19 07:37:50,320 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2023-11-19 07:37:50,321 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 124 flow [2023-11-19 07:37:50,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:50,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:50,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:50,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:37:50,323 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 2 more)] === [2023-11-19 07:37:50,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:50,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1670752228, now seen corresponding path program 1 times [2023-11-19 07:37:50,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:50,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656657579] [2023-11-19 07:37:50,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:50,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:37:50,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:50,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656657579] [2023-11-19 07:37:50,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656657579] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:50,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:50,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:37:50,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039757332] [2023-11-19 07:37:50,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:50,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:37:50,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:50,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:37:50,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:37:50,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 541 [2023-11-19 07:37:50,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 235.5) internal successors, (942), 4 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:50,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:50,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 541 [2023-11-19 07:37:50,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:51,696 INFO L124 PetriNetUnfolderBase]: 5431/7645 cut-off events. [2023-11-19 07:37:51,698 INFO L125 PetriNetUnfolderBase]: For 2832/2832 co-relation queries the response was YES. [2023-11-19 07:37:51,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17957 conditions, 7645 events. 5431/7645 cut-off events. For 2832/2832 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 35208 event pairs, 4378 based on Foata normal form. 156/7743 useless extension candidates. Maximal degree in co-relation 11244. Up to 5250 conditions per place. [2023-11-19 07:37:51,761 INFO L140 encePairwiseOnDemand]: 537/541 looper letters, 70 selfloop transitions, 3 changer transitions 0/75 dead transitions. [2023-11-19 07:37:51,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 75 transitions, 361 flow [2023-11-19 07:37:51,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:37:51,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:37:51,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 980 transitions. [2023-11-19 07:37:51,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45286506469500926 [2023-11-19 07:37:51,766 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 980 transitions. [2023-11-19 07:37:51,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 980 transitions. [2023-11-19 07:37:51,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:51,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 980 transitions. [2023-11-19 07:37:51,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:51,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 541.0) internal successors, (2705), 5 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:51,778 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 541.0) internal successors, (2705), 5 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:51,778 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 124 flow. Second operand 4 states and 980 transitions. [2023-11-19 07:37:51,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 75 transitions, 361 flow [2023-11-19 07:37:51,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 75 transitions, 358 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:37:51,786 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 142 flow [2023-11-19 07:37:51,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2023-11-19 07:37:51,788 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2023-11-19 07:37:51,789 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 142 flow [2023-11-19 07:37:51,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 235.5) internal successors, (942), 4 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:51,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:51,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:51,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:37:51,791 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 2 more)] === [2023-11-19 07:37:51,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:51,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1253405627, now seen corresponding path program 1 times [2023-11-19 07:37:51,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:51,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506035375] [2023-11-19 07:37:51,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:51,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:51,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:37:52,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:52,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506035375] [2023-11-19 07:37:52,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506035375] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:52,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:52,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:37:52,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968238839] [2023-11-19 07:37:52,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:52,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:37:52,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:52,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:37:52,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:37:52,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 541 [2023-11-19 07:37:52,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 235.5) internal successors, (942), 4 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:52,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:52,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 541 [2023-11-19 07:37:52,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:53,606 INFO L124 PetriNetUnfolderBase]: 7695/11006 cut-off events. [2023-11-19 07:37:53,606 INFO L125 PetriNetUnfolderBase]: For 4076/4076 co-relation queries the response was YES. [2023-11-19 07:37:53,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25141 conditions, 11006 events. 7695/11006 cut-off events. For 4076/4076 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 55604 event pairs, 6450 based on Foata normal form. 306/11269 useless extension candidates. Maximal degree in co-relation 18194. Up to 7422 conditions per place. [2023-11-19 07:37:53,672 INFO L140 encePairwiseOnDemand]: 535/541 looper letters, 69 selfloop transitions, 6 changer transitions 0/77 dead transitions. [2023-11-19 07:37:53,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 77 transitions, 384 flow [2023-11-19 07:37:53,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:37:53,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:37:53,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1208 transitions. [2023-11-19 07:37:53,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4465804066543438 [2023-11-19 07:37:53,678 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1208 transitions. [2023-11-19 07:37:53,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1208 transitions. [2023-11-19 07:37:53,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:53,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1208 transitions. [2023-11-19 07:37:53,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 241.6) internal successors, (1208), 5 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:53,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 541.0) internal successors, (3246), 6 states have internal predecessors, (3246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:53,693 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 541.0) internal successors, (3246), 6 states have internal predecessors, (3246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:53,694 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 142 flow. Second operand 5 states and 1208 transitions. [2023-11-19 07:37:53,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 77 transitions, 384 flow [2023-11-19 07:37:53,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 380 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:37:53,701 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 177 flow [2023-11-19 07:37:53,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2023-11-19 07:37:53,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2023-11-19 07:37:53,705 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 177 flow [2023-11-19 07:37:53,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 235.5) internal successors, (942), 4 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:53,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:53,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:53,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:37:53,708 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 2 more)] === [2023-11-19 07:37:53,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:53,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1121181129, now seen corresponding path program 1 times [2023-11-19 07:37:53,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:53,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118530015] [2023-11-19 07:37:53,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:53,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:37:54,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:54,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118530015] [2023-11-19 07:37:54,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118530015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:54,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:54,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:37:54,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954692478] [2023-11-19 07:37:54,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:54,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:37:54,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:54,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:37:54,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:37:54,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 541 [2023-11-19 07:37:54,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 177 flow. Second operand has 6 states, 6 states have (on average 229.16666666666666) internal successors, (1375), 6 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:54,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:54,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 541 [2023-11-19 07:37:54,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:57,337 INFO L124 PetriNetUnfolderBase]: 12051/17346 cut-off events. [2023-11-19 07:37:57,338 INFO L125 PetriNetUnfolderBase]: For 6070/6070 co-relation queries the response was YES. [2023-11-19 07:37:57,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39450 conditions, 17346 events. 12051/17346 cut-off events. For 6070/6070 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 96829 event pairs, 7150 based on Foata normal form. 236/17524 useless extension candidates. Maximal degree in co-relation 28754. Up to 10748 conditions per place. [2023-11-19 07:37:57,447 INFO L140 encePairwiseOnDemand]: 535/541 looper letters, 84 selfloop transitions, 7 changer transitions 1/94 dead transitions. [2023-11-19 07:37:57,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 94 transitions, 500 flow [2023-11-19 07:37:57,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:37:57,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:37:57,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1423 transitions. [2023-11-19 07:37:57,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43838570548367223 [2023-11-19 07:37:57,544 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1423 transitions. [2023-11-19 07:37:57,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1423 transitions. [2023-11-19 07:37:57,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:57,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1423 transitions. [2023-11-19 07:37:57,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 237.16666666666666) internal successors, (1423), 6 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:57,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 541.0) internal successors, (3787), 7 states have internal predecessors, (3787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:57,570 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 541.0) internal successors, (3787), 7 states have internal predecessors, (3787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:57,571 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 177 flow. Second operand 6 states and 1423 transitions. [2023-11-19 07:37:57,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 94 transitions, 500 flow [2023-11-19 07:37:57,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 94 transitions, 493 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-19 07:37:57,578 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 204 flow [2023-11-19 07:37:57,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=204, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2023-11-19 07:37:57,580 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2023-11-19 07:37:57,580 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 204 flow [2023-11-19 07:37:57,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 229.16666666666666) internal successors, (1375), 6 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:57,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:57,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:57,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:37:57,582 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 2 more)] === [2023-11-19 07:37:57,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:57,583 INFO L85 PathProgramCache]: Analyzing trace with hash 839614652, now seen corresponding path program 1 times [2023-11-19 07:37:57,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:57,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280210803] [2023-11-19 07:37:57,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:57,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:57,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:58,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:37:58,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:58,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280210803] [2023-11-19 07:37:58,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280210803] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:58,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:58,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:37:58,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395028515] [2023-11-19 07:37:58,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:58,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:37:58,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:58,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:37:58,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:37:58,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 541 [2023-11-19 07:37:58,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 204 flow. Second operand has 6 states, 6 states have (on average 229.16666666666666) internal successors, (1375), 6 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:58,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:58,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 541 [2023-11-19 07:37:58,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:38:00,334 INFO L124 PetriNetUnfolderBase]: 8981/12934 cut-off events. [2023-11-19 07:38:00,335 INFO L125 PetriNetUnfolderBase]: For 6160/6160 co-relation queries the response was YES. [2023-11-19 07:38:00,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30518 conditions, 12934 events. 8981/12934 cut-off events. For 6160/6160 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 69282 event pairs, 4634 based on Foata normal form. 192/13086 useless extension candidates. Maximal degree in co-relation 22048. Up to 6659 conditions per place. [2023-11-19 07:38:00,423 INFO L140 encePairwiseOnDemand]: 535/541 looper letters, 63 selfloop transitions, 6 changer transitions 37/108 dead transitions. [2023-11-19 07:38:00,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 108 transitions, 575 flow [2023-11-19 07:38:00,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:38:00,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:38:00,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1441 transitions. [2023-11-19 07:38:00,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4439309919901417 [2023-11-19 07:38:00,432 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1441 transitions. [2023-11-19 07:38:00,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1441 transitions. [2023-11-19 07:38:00,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:38:00,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1441 transitions. [2023-11-19 07:38:00,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 240.16666666666666) internal successors, (1441), 6 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:00,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 541.0) internal successors, (3787), 7 states have internal predecessors, (3787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:00,449 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 541.0) internal successors, (3787), 7 states have internal predecessors, (3787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:00,449 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 204 flow. Second operand 6 states and 1441 transitions. [2023-11-19 07:38:00,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 108 transitions, 575 flow [2023-11-19 07:38:00,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 108 transitions, 563 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-19 07:38:00,458 INFO L231 Difference]: Finished difference. Result has 63 places, 47 transitions, 192 flow [2023-11-19 07:38:00,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=63, PETRI_TRANSITIONS=47} [2023-11-19 07:38:00,459 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2023-11-19 07:38:00,459 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 47 transitions, 192 flow [2023-11-19 07:38:00,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 229.16666666666666) internal successors, (1375), 6 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:00,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:38:00,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:00,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:38:00,461 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 2 more)] === [2023-11-19 07:38:00,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:00,462 INFO L85 PathProgramCache]: Analyzing trace with hash -309868943, now seen corresponding path program 1 times [2023-11-19 07:38:00,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:00,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308881207] [2023-11-19 07:38:00,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:00,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:00,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:00,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:38:00,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:00,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308881207] [2023-11-19 07:38:00,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308881207] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:00,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:00,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:38:00,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588784179] [2023-11-19 07:38:00,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:00,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:38:00,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:00,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:38:00,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:38:00,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 541 [2023-11-19 07:38:01,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 47 transitions, 192 flow. Second operand has 6 states, 6 states have (on average 229.33333333333334) internal successors, (1376), 6 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:01,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:38:01,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 541 [2023-11-19 07:38:01,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:38:02,227 INFO L124 PetriNetUnfolderBase]: 5435/7682 cut-off events. [2023-11-19 07:38:02,227 INFO L125 PetriNetUnfolderBase]: For 4989/4989 co-relation queries the response was YES. [2023-11-19 07:38:02,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19703 conditions, 7682 events. 5435/7682 cut-off events. For 4989/4989 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 37158 event pairs, 964 based on Foata normal form. 472/8150 useless extension candidates. Maximal degree in co-relation 15868. Up to 4482 conditions per place. [2023-11-19 07:38:02,281 INFO L140 encePairwiseOnDemand]: 535/541 looper letters, 71 selfloop transitions, 7 changer transitions 1/81 dead transitions. [2023-11-19 07:38:02,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 81 transitions, 460 flow [2023-11-19 07:38:02,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:38:02,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:38:02,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1412 transitions. [2023-11-19 07:38:02,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349969192852742 [2023-11-19 07:38:02,289 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1412 transitions. [2023-11-19 07:38:02,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1412 transitions. [2023-11-19 07:38:02,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:38:02,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1412 transitions. [2023-11-19 07:38:02,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 235.33333333333334) internal successors, (1412), 6 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:02,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 541.0) internal successors, (3787), 7 states have internal predecessors, (3787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:02,305 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 541.0) internal successors, (3787), 7 states have internal predecessors, (3787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:02,305 INFO L175 Difference]: Start difference. First operand has 63 places, 47 transitions, 192 flow. Second operand 6 states and 1412 transitions. [2023-11-19 07:38:02,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 81 transitions, 460 flow [2023-11-19 07:38:02,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 81 transitions, 438 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-11-19 07:38:02,315 INFO L231 Difference]: Finished difference. Result has 59 places, 46 transitions, 188 flow [2023-11-19 07:38:02,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=188, PETRI_PLACES=59, PETRI_TRANSITIONS=46} [2023-11-19 07:38:02,317 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2023-11-19 07:38:02,318 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 46 transitions, 188 flow [2023-11-19 07:38:02,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 229.33333333333334) internal successors, (1376), 6 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:02,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:38:02,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:02,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:38:02,320 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 2 more)] === [2023-11-19 07:38:02,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:02,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1884913280, now seen corresponding path program 1 times [2023-11-19 07:38:02,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:02,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363911916] [2023-11-19 07:38:02,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:02,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:38:02,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:02,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363911916] [2023-11-19 07:38:02,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363911916] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:02,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:02,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:38:02,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018750446] [2023-11-19 07:38:02,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:02,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:38:02,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:02,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:38:02,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:38:02,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 541 [2023-11-19 07:38:02,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 46 transitions, 188 flow. Second operand has 6 states, 6 states have (on average 229.33333333333334) internal successors, (1376), 6 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:02,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:38:02,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 541 [2023-11-19 07:38:02,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:38:03,644 INFO L124 PetriNetUnfolderBase]: 3332/4605 cut-off events. [2023-11-19 07:38:03,645 INFO L125 PetriNetUnfolderBase]: For 3743/3743 co-relation queries the response was YES. [2023-11-19 07:38:03,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12259 conditions, 4605 events. 3332/4605 cut-off events. For 3743/3743 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 20098 event pairs, 588 based on Foata normal form. 332/4919 useless extension candidates. Maximal degree in co-relation 12230. Up to 2210 conditions per place. [2023-11-19 07:38:03,677 INFO L140 encePairwiseOnDemand]: 535/541 looper letters, 71 selfloop transitions, 5 changer transitions 2/80 dead transitions. [2023-11-19 07:38:03,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 80 transitions, 462 flow [2023-11-19 07:38:03,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:38:03,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:38:03,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1412 transitions. [2023-11-19 07:38:03,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349969192852742 [2023-11-19 07:38:03,685 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1412 transitions. [2023-11-19 07:38:03,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1412 transitions. [2023-11-19 07:38:03,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:38:03,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1412 transitions. [2023-11-19 07:38:03,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 235.33333333333334) internal successors, (1412), 6 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:03,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 541.0) internal successors, (3787), 7 states have internal predecessors, (3787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:03,701 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 541.0) internal successors, (3787), 7 states have internal predecessors, (3787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:03,702 INFO L175 Difference]: Start difference. First operand has 59 places, 46 transitions, 188 flow. Second operand 6 states and 1412 transitions. [2023-11-19 07:38:03,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 80 transitions, 462 flow [2023-11-19 07:38:03,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 80 transitions, 430 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-11-19 07:38:03,707 INFO L231 Difference]: Finished difference. Result has 58 places, 44 transitions, 168 flow [2023-11-19 07:38:03,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=168, PETRI_PLACES=58, PETRI_TRANSITIONS=44} [2023-11-19 07:38:03,708 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2023-11-19 07:38:03,709 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 44 transitions, 168 flow [2023-11-19 07:38:03,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 229.33333333333334) internal successors, (1376), 6 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:03,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:38:03,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:03,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:38:03,711 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 2 more)] === [2023-11-19 07:38:03,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:03,711 INFO L85 PathProgramCache]: Analyzing trace with hash 714191739, now seen corresponding path program 1 times [2023-11-19 07:38:03,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:03,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903521475] [2023-11-19 07:38:03,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:03,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:04,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:38:04,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:04,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903521475] [2023-11-19 07:38:04,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903521475] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:04,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079672001] [2023-11-19 07:38:04,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:04,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:04,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f85641-04a7-4ef1-8616-68ea24a8a5d9/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:04,212 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f85641-04a7-4ef1-8616-68ea24a8a5d9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:04,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f85641-04a7-4ef1-8616-68ea24a8a5d9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:38:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:04,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:38:04,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:04,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:38:04,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:38:04,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079672001] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:04,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:38:04,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 7] total 16 [2023-11-19 07:38:04,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809010571] [2023-11-19 07:38:04,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:04,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:38:04,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:04,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:38:04,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:38:05,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 541 [2023-11-19 07:38:05,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 44 transitions, 168 flow. Second operand has 8 states, 8 states have (on average 214.375) internal successors, (1715), 8 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:05,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:38:05,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 541 [2023-11-19 07:38:05,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:38:06,744 INFO L124 PetriNetUnfolderBase]: 3890/5352 cut-off events. [2023-11-19 07:38:06,744 INFO L125 PetriNetUnfolderBase]: For 4323/4323 co-relation queries the response was YES. [2023-11-19 07:38:06,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14905 conditions, 5352 events. 3890/5352 cut-off events. For 4323/4323 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 22392 event pairs, 319 based on Foata normal form. 248/5599 useless extension candidates. Maximal degree in co-relation 14877. Up to 2036 conditions per place. [2023-11-19 07:38:06,795 INFO L140 encePairwiseOnDemand]: 529/541 looper letters, 145 selfloop transitions, 40 changer transitions 0/185 dead transitions. [2023-11-19 07:38:06,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 185 transitions, 1004 flow [2023-11-19 07:38:06,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:38:06,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:38:06,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2688 transitions. [2023-11-19 07:38:06,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41404805914972276 [2023-11-19 07:38:06,810 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2688 transitions. [2023-11-19 07:38:06,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2688 transitions. [2023-11-19 07:38:06,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:38:06,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2688 transitions. [2023-11-19 07:38:06,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 224.0) internal successors, (2688), 12 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:06,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 541.0) internal successors, (7033), 13 states have internal predecessors, (7033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:06,842 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 541.0) internal successors, (7033), 13 states have internal predecessors, (7033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:06,843 INFO L175 Difference]: Start difference. First operand has 58 places, 44 transitions, 168 flow. Second operand 12 states and 2688 transitions. [2023-11-19 07:38:06,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 185 transitions, 1004 flow [2023-11-19 07:38:06,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 185 transitions, 972 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-11-19 07:38:06,852 INFO L231 Difference]: Finished difference. Result has 67 places, 89 transitions, 495 flow [2023-11-19 07:38:06,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=495, PETRI_PLACES=67, PETRI_TRANSITIONS=89} [2023-11-19 07:38:06,854 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2023-11-19 07:38:06,854 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 89 transitions, 495 flow [2023-11-19 07:38:06,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 214.375) internal successors, (1715), 8 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:06,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:38:06,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:06,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f85641-04a7-4ef1-8616-68ea24a8a5d9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:07,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f85641-04a7-4ef1-8616-68ea24a8a5d9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:38:07,072 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 2 more)] === [2023-11-19 07:38:07,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:07,072 INFO L85 PathProgramCache]: Analyzing trace with hash -2059134255, now seen corresponding path program 2 times [2023-11-19 07:38:07,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:07,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852492102] [2023-11-19 07:38:07,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:07,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:07,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:38:07,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:07,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852492102] [2023-11-19 07:38:07,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852492102] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:07,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:07,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:38:07,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320592436] [2023-11-19 07:38:07,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:07,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:38:07,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:07,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:38:07,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:38:07,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 541 [2023-11-19 07:38:07,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 89 transitions, 495 flow. Second operand has 5 states, 5 states have (on average 247.8) internal successors, (1239), 5 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:07,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:38:07,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 541 [2023-11-19 07:38:07,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:38:09,036 INFO L124 PetriNetUnfolderBase]: 5386/7349 cut-off events. [2023-11-19 07:38:09,037 INFO L125 PetriNetUnfolderBase]: For 13964/13980 co-relation queries the response was YES. [2023-11-19 07:38:09,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26865 conditions, 7349 events. 5386/7349 cut-off events. For 13964/13980 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 32021 event pairs, 913 based on Foata normal form. 262/7610 useless extension candidates. Maximal degree in co-relation 26833. Up to 2838 conditions per place. [2023-11-19 07:38:09,130 INFO L140 encePairwiseOnDemand]: 535/541 looper letters, 148 selfloop transitions, 30 changer transitions 0/179 dead transitions. [2023-11-19 07:38:09,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 179 transitions, 1320 flow [2023-11-19 07:38:09,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:38:09,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:38:09,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1541 transitions. [2023-11-19 07:38:09,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4747381392483056 [2023-11-19 07:38:09,141 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1541 transitions. [2023-11-19 07:38:09,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1541 transitions. [2023-11-19 07:38:09,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:38:09,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1541 transitions. [2023-11-19 07:38:09,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 256.8333333333333) internal successors, (1541), 6 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:09,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 541.0) internal successors, (3787), 7 states have internal predecessors, (3787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:09,161 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 541.0) internal successors, (3787), 7 states have internal predecessors, (3787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:09,161 INFO L175 Difference]: Start difference. First operand has 67 places, 89 transitions, 495 flow. Second operand 6 states and 1541 transitions. [2023-11-19 07:38:09,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 179 transitions, 1320 flow [2023-11-19 07:38:09,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 179 transitions, 1284 flow, removed 16 selfloop flow, removed 2 redundant places. [2023-11-19 07:38:09,277 INFO L231 Difference]: Finished difference. Result has 74 places, 103 transitions, 724 flow [2023-11-19 07:38:09,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=724, PETRI_PLACES=74, PETRI_TRANSITIONS=103} [2023-11-19 07:38:09,279 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2023-11-19 07:38:09,279 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 103 transitions, 724 flow [2023-11-19 07:38:09,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 247.8) internal successors, (1239), 5 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:09,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:38:09,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:09,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:38:09,281 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 2 more)] === [2023-11-19 07:38:09,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:09,282 INFO L85 PathProgramCache]: Analyzing trace with hash 212980824, now seen corresponding path program 1 times [2023-11-19 07:38:09,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:09,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798301291] [2023-11-19 07:38:09,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:09,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:09,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:09,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:38:09,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:09,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798301291] [2023-11-19 07:38:09,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798301291] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:09,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:09,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:38:09,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043007431] [2023-11-19 07:38:09,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:09,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:38:09,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:09,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:38:09,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:38:10,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 541 [2023-11-19 07:38:10,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 103 transitions, 724 flow. Second operand has 6 states, 6 states have (on average 225.66666666666666) internal successors, (1354), 6 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:10,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:38:10,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 541 [2023-11-19 07:38:10,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:38:11,843 INFO L124 PetriNetUnfolderBase]: 5532/7635 cut-off events. [2023-11-19 07:38:11,843 INFO L125 PetriNetUnfolderBase]: For 27396/27428 co-relation queries the response was YES. [2023-11-19 07:38:11,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31215 conditions, 7635 events. 5532/7635 cut-off events. For 27396/27428 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 33904 event pairs, 2097 based on Foata normal form. 356/7976 useless extension candidates. Maximal degree in co-relation 31178. Up to 5141 conditions per place. [2023-11-19 07:38:11,935 INFO L140 encePairwiseOnDemand]: 534/541 looper letters, 159 selfloop transitions, 15 changer transitions 0/180 dead transitions. [2023-11-19 07:38:11,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 180 transitions, 1674 flow [2023-11-19 07:38:11,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:38:11,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:38:11,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1622 transitions. [2023-11-19 07:38:11,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42830736730921576 [2023-11-19 07:38:11,945 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1622 transitions. [2023-11-19 07:38:11,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1622 transitions. [2023-11-19 07:38:11,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:38:11,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1622 transitions. [2023-11-19 07:38:11,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 231.71428571428572) internal successors, (1622), 7 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:11,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 541.0) internal successors, (4328), 8 states have internal predecessors, (4328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:11,962 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 541.0) internal successors, (4328), 8 states have internal predecessors, (4328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:11,962 INFO L175 Difference]: Start difference. First operand has 74 places, 103 transitions, 724 flow. Second operand 7 states and 1622 transitions. [2023-11-19 07:38:11,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 180 transitions, 1674 flow [2023-11-19 07:38:12,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 180 transitions, 1635 flow, removed 19 selfloop flow, removed 1 redundant places. [2023-11-19 07:38:12,161 INFO L231 Difference]: Finished difference. Result has 82 places, 106 transitions, 782 flow [2023-11-19 07:38:12,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=782, PETRI_PLACES=82, PETRI_TRANSITIONS=106} [2023-11-19 07:38:12,162 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2023-11-19 07:38:12,162 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 106 transitions, 782 flow [2023-11-19 07:38:12,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 225.66666666666666) internal successors, (1354), 6 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:12,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:38:12,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:12,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:38:12,164 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 2 more)] === [2023-11-19 07:38:12,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:12,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1476894300, now seen corresponding path program 2 times [2023-11-19 07:38:12,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:12,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028778752] [2023-11-19 07:38:12,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:12,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:38:12,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:12,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028778752] [2023-11-19 07:38:12,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028778752] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:12,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969263996] [2023-11-19 07:38:12,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:38:12,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:12,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f85641-04a7-4ef1-8616-68ea24a8a5d9/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:12,451 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f85641-04a7-4ef1-8616-68ea24a8a5d9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:12,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f85641-04a7-4ef1-8616-68ea24a8a5d9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:38:12,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:38:12,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:38:12,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:38:12,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:12,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:38:12,767 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:38:12,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969263996] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:12,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:38:12,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2023-11-19 07:38:12,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573270557] [2023-11-19 07:38:12,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:12,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:38:12,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:12,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:38:12,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:38:12,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 541 [2023-11-19 07:38:12,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 106 transitions, 782 flow. Second operand has 6 states, 6 states have (on average 241.83333333333334) internal successors, (1451), 6 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:12,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:38:12,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 541 [2023-11-19 07:38:12,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:38:15,044 INFO L124 PetriNetUnfolderBase]: 10952/14791 cut-off events. [2023-11-19 07:38:15,044 INFO L125 PetriNetUnfolderBase]: For 54365/54365 co-relation queries the response was YES. [2023-11-19 07:38:15,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63030 conditions, 14791 events. 10952/14791 cut-off events. For 54365/54365 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 69532 event pairs, 2337 based on Foata normal form. 384/15174 useless extension candidates. Maximal degree in co-relation 62989. Up to 5349 conditions per place. [2023-11-19 07:38:15,220 INFO L140 encePairwiseOnDemand]: 532/541 looper letters, 233 selfloop transitions, 56 changer transitions 0/289 dead transitions. [2023-11-19 07:38:15,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 289 transitions, 2678 flow [2023-11-19 07:38:15,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:38:15,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:38:15,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2019 transitions. [2023-11-19 07:38:15,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46649722735674676 [2023-11-19 07:38:15,231 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2019 transitions. [2023-11-19 07:38:15,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2019 transitions. [2023-11-19 07:38:15,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:38:15,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2019 transitions. [2023-11-19 07:38:15,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 252.375) internal successors, (2019), 8 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:15,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 541.0) internal successors, (4869), 9 states have internal predecessors, (4869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:15,254 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 541.0) internal successors, (4869), 9 states have internal predecessors, (4869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:15,255 INFO L175 Difference]: Start difference. First operand has 82 places, 106 transitions, 782 flow. Second operand 8 states and 2019 transitions. [2023-11-19 07:38:15,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 289 transitions, 2678 flow [2023-11-19 07:38:15,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 289 transitions, 2649 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-11-19 07:38:15,910 INFO L231 Difference]: Finished difference. Result has 92 places, 146 transitions, 1353 flow [2023-11-19 07:38:15,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1353, PETRI_PLACES=92, PETRI_TRANSITIONS=146} [2023-11-19 07:38:15,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2023-11-19 07:38:15,912 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 146 transitions, 1353 flow [2023-11-19 07:38:15,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 241.83333333333334) internal successors, (1451), 6 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:15,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:38:15,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:15,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f85641-04a7-4ef1-8616-68ea24a8a5d9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-19 07:38:16,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f85641-04a7-4ef1-8616-68ea24a8a5d9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 07:38:16,127 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 2 more)] === [2023-11-19 07:38:16,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:16,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1977772996, now seen corresponding path program 1 times [2023-11-19 07:38:16,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:16,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241471899] [2023-11-19 07:38:16,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:16,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:16,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat