./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-counter-determinism.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_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/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_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-determinism.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/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_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/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 1dad5daa490be7069cef5ea8bf1cf3314a40a44a4796167c86226f70cfcf68a2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:39:45,292 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:39:45,425 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:39:45,433 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:39:45,434 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:39:45,476 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:39:45,477 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:39:45,478 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:39:45,479 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:39:45,485 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:39:45,486 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:39:45,486 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:39:45,487 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:39:45,489 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:39:45,490 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:39:45,490 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:39:45,491 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:39:45,491 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:39:45,492 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:39:45,492 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:39:45,493 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:39:45,494 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:39:45,494 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:39:45,494 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:39:45,495 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:39:45,496 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:39:45,496 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:39:45,497 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:39:45,497 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:39:45,498 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:39:45,499 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:39:45,499 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:39:45,500 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:39:45,500 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:39:45,500 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:39:45,500 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:39:45,501 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:39:45,501 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:39:45,501 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:39:45,502 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_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1dad5daa490be7069cef5ea8bf1cf3314a40a44a4796167c86226f70cfcf68a2 [2023-11-19 07:39:45,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:39:45,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:39:45,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:39:45,904 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:39:45,905 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:39:45,906 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-counter-determinism.wvr.c [2023-11-19 07:39:49,287 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:39:49,535 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:39:49,536 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/sv-benchmarks/c/weaver/popl20-counter-determinism.wvr.c [2023-11-19 07:39:49,545 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/data/5cf8da18c/baa32bc230cd4d84a5026ec22b03e2c0/FLAG66b9c4861 [2023-11-19 07:39:49,560 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/data/5cf8da18c/baa32bc230cd4d84a5026ec22b03e2c0 [2023-11-19 07:39:49,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:39:49,565 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:39:49,566 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:39:49,567 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:39:49,572 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:39:49,573 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:39:49" (1/1) ... [2023-11-19 07:39:49,575 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a02a7f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:49, skipping insertion in model container [2023-11-19 07:39:49,575 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:39:49" (1/1) ... [2023-11-19 07:39:49,601 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:39:49,795 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_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/sv-benchmarks/c/weaver/popl20-counter-determinism.wvr.c[2528,2541] [2023-11-19 07:39:49,800 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:39:49,809 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:39:49,837 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_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/sv-benchmarks/c/weaver/popl20-counter-determinism.wvr.c[2528,2541] [2023-11-19 07:39:49,838 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:39:49,846 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:39:49,847 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:39:49,854 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:39:49,855 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:49 WrapperNode [2023-11-19 07:39:49,855 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:39:49,857 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:39:49,857 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:39:49,857 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:39:49,865 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:49" (1/1) ... [2023-11-19 07:39:49,873 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:49" (1/1) ... [2023-11-19 07:39:49,898 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 120 [2023-11-19 07:39:49,898 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:39:49,899 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:39:49,899 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:39:49,899 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:39:49,908 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:49" (1/1) ... [2023-11-19 07:39:49,909 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:49" (1/1) ... [2023-11-19 07:39:49,912 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:49" (1/1) ... [2023-11-19 07:39:49,912 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:49" (1/1) ... [2023-11-19 07:39:49,919 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:49" (1/1) ... [2023-11-19 07:39:49,923 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:49" (1/1) ... [2023-11-19 07:39:49,925 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:49" (1/1) ... [2023-11-19 07:39:49,926 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:49" (1/1) ... [2023-11-19 07:39:49,930 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:39:49,931 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:39:49,931 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:39:49,931 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:39:49,932 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:49" (1/1) ... [2023-11-19 07:39:49,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:39:49,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:49,966 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:39:49,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:39:50,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:39:50,013 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:39:50,013 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:39:50,013 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:39:50,013 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:39:50,013 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 07:39:50,014 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 07:39:50,014 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-19 07:39:50,014 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-19 07:39:50,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:39:50,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:39:50,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:39:50,017 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:39:50,017 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:39:50,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:39:50,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:39:50,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:39:50,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:39:50,020 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 07:39:50,173 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:39:50,176 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:39:50,459 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:39:50,526 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:39:50,527 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 07:39:50,531 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:39:50 BoogieIcfgContainer [2023-11-19 07:39:50,531 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:39:50,533 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:39:50,534 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:39:50,537 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:39:50,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:39:49" (1/3) ... [2023-11-19 07:39:50,538 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d6cf8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:39:50, skipping insertion in model container [2023-11-19 07:39:50,539 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:49" (2/3) ... [2023-11-19 07:39:50,539 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d6cf8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:39:50, skipping insertion in model container [2023-11-19 07:39:50,539 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:39:50" (3/3) ... [2023-11-19 07:39:50,541 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-determinism.wvr.c [2023-11-19 07:39:50,551 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:39:50,563 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:39:50,563 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:39:50,563 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:39:50,713 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-19 07:39:50,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 129 transitions, 286 flow [2023-11-19 07:39:50,864 INFO L124 PetriNetUnfolderBase]: 9/125 cut-off events. [2023-11-19 07:39:50,864 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:39:50,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 125 events. 9/125 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 113 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-11-19 07:39:50,883 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 129 transitions, 286 flow [2023-11-19 07:39:50,890 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 112 transitions, 248 flow [2023-11-19 07:39:50,898 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:39:50,921 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 116 places, 112 transitions, 248 flow [2023-11-19 07:39:50,932 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 116 places, 112 transitions, 248 flow [2023-11-19 07:39:50,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 112 transitions, 248 flow [2023-11-19 07:39:51,035 INFO L124 PetriNetUnfolderBase]: 9/112 cut-off events. [2023-11-19 07:39:51,039 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:39:51,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 112 events. 9/112 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 112 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-11-19 07:39:51,049 INFO L119 LiptonReduction]: Number of co-enabled transitions 3312 [2023-11-19 07:39:55,285 INFO L134 LiptonReduction]: Checked pairs total: 2929 [2023-11-19 07:39:55,286 INFO L136 LiptonReduction]: Total number of compositions: 90 [2023-11-19 07:39:55,303 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:39:55,311 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;@79b77235, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:39:55,311 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-19 07:39:55,321 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:39:55,321 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2023-11-19 07:39:55,321 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:39:55,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:55,322 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] [2023-11-19 07:39:55,323 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 07:39:55,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:55,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1345402121, now seen corresponding path program 1 times [2023-11-19 07:39:55,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:55,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821319477] [2023-11-19 07:39:55,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:55,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:55,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:55,898 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 07:39:55,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:55,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821319477] [2023-11-19 07:39:55,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821319477] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:55,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:55,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:39:55,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221221367] [2023-11-19 07:39:55,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:55,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:39:55,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:55,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:39:55,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:39:55,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 219 [2023-11-19 07:39:55,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:55,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:55,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 219 [2023-11-19 07:39:55,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:56,481 INFO L124 PetriNetUnfolderBase]: 1932/2564 cut-off events. [2023-11-19 07:39:56,482 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2023-11-19 07:39:56,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5366 conditions, 2564 events. 1932/2564 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8722 event pairs, 624 based on Foata normal form. 1/1861 useless extension candidates. Maximal degree in co-relation 4140. Up to 1621 conditions per place. [2023-11-19 07:39:56,514 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 49 selfloop transitions, 5 changer transitions 1/55 dead transitions. [2023-11-19 07:39:56,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 265 flow [2023-11-19 07:39:56,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:39:56,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:39:56,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 383 transitions. [2023-11-19 07:39:56,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5829528158295282 [2023-11-19 07:39:56,544 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 383 transitions. [2023-11-19 07:39:56,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 383 transitions. [2023-11-19 07:39:56,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:56,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 383 transitions. [2023-11-19 07:39:56,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:56,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:56,567 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:56,570 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 82 flow. Second operand 3 states and 383 transitions. [2023-11-19 07:39:56,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 265 flow [2023-11-19 07:39:56,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 55 transitions, 235 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-19 07:39:56,584 INFO L231 Difference]: Finished difference. Result has 33 places, 33 transitions, 99 flow [2023-11-19 07:39:56,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=33, PETRI_TRANSITIONS=33} [2023-11-19 07:39:56,591 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-11-19 07:39:56,591 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 33 transitions, 99 flow [2023-11-19 07:39:56,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:56,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:56,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:56,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:39:56,594 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 07:39:56,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:56,595 INFO L85 PathProgramCache]: Analyzing trace with hash 736420190, now seen corresponding path program 1 times [2023-11-19 07:39:56,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:56,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896059635] [2023-11-19 07:39:56,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:56,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:56,916 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 07:39:56,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:56,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896059635] [2023-11-19 07:39:56,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896059635] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:56,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:56,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:39:56,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849663330] [2023-11-19 07:39:56,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:56,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:39:56,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:56,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:39:56,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:39:56,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 219 [2023-11-19 07:39:56,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 33 transitions, 99 flow. Second operand has 5 states, 5 states have (on average 105.2) internal successors, (526), 5 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:56,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:56,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 219 [2023-11-19 07:39:56,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:57,523 INFO L124 PetriNetUnfolderBase]: 2594/3390 cut-off events. [2023-11-19 07:39:57,525 INFO L125 PetriNetUnfolderBase]: For 740/740 co-relation queries the response was YES. [2023-11-19 07:39:57,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8308 conditions, 3390 events. 2594/3390 cut-off events. For 740/740 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11902 event pairs, 1059 based on Foata normal form. 46/3436 useless extension candidates. Maximal degree in co-relation 2270. Up to 2438 conditions per place. [2023-11-19 07:39:57,553 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 75 selfloop transitions, 12 changer transitions 0/87 dead transitions. [2023-11-19 07:39:57,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 87 transitions, 435 flow [2023-11-19 07:39:57,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:39:57,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:39:57,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 575 transitions. [2023-11-19 07:39:57,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5251141552511416 [2023-11-19 07:39:57,558 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 575 transitions. [2023-11-19 07:39:57,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 575 transitions. [2023-11-19 07:39:57,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:57,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 575 transitions. [2023-11-19 07:39:57,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:57,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:57,570 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:57,571 INFO L175 Difference]: Start difference. First operand has 33 places, 33 transitions, 99 flow. Second operand 5 states and 575 transitions. [2023-11-19 07:39:57,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 87 transitions, 435 flow [2023-11-19 07:39:57,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 87 transitions, 421 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:39:57,583 INFO L231 Difference]: Finished difference. Result has 38 places, 43 transitions, 174 flow [2023-11-19 07:39:57,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=38, PETRI_TRANSITIONS=43} [2023-11-19 07:39:57,585 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2023-11-19 07:39:57,585 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 43 transitions, 174 flow [2023-11-19 07:39:57,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.2) internal successors, (526), 5 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:57,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:57,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:57,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:39:57,587 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 07:39:57,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:57,589 INFO L85 PathProgramCache]: Analyzing trace with hash -209219930, now seen corresponding path program 1 times [2023-11-19 07:39:57,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:57,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386949128] [2023-11-19 07:39:57,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:57,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:57,717 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 07:39:57,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:57,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386949128] [2023-11-19 07:39:57,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386949128] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:57,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:57,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:39:57,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509147264] [2023-11-19 07:39:57,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:57,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:39:57,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:57,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:39:57,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:39:57,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 219 [2023-11-19 07:39:57,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 43 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:57,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:57,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 219 [2023-11-19 07:39:57,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:58,126 INFO L124 PetriNetUnfolderBase]: 2622/3526 cut-off events. [2023-11-19 07:39:58,126 INFO L125 PetriNetUnfolderBase]: For 2975/2975 co-relation queries the response was YES. [2023-11-19 07:39:58,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9817 conditions, 3526 events. 2622/3526 cut-off events. For 2975/2975 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13110 event pairs, 1300 based on Foata normal form. 218/3744 useless extension candidates. Maximal degree in co-relation 4853. Up to 2382 conditions per place. [2023-11-19 07:39:58,157 INFO L140 encePairwiseOnDemand]: 216/219 looper letters, 58 selfloop transitions, 5 changer transitions 0/63 dead transitions. [2023-11-19 07:39:58,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 63 transitions, 341 flow [2023-11-19 07:39:58,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:39:58,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:39:58,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 385 transitions. [2023-11-19 07:39:58,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5859969558599696 [2023-11-19 07:39:58,160 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 385 transitions. [2023-11-19 07:39:58,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 385 transitions. [2023-11-19 07:39:58,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:58,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 385 transitions. [2023-11-19 07:39:58,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:58,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:58,165 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:58,165 INFO L175 Difference]: Start difference. First operand has 38 places, 43 transitions, 174 flow. Second operand 3 states and 385 transitions. [2023-11-19 07:39:58,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 63 transitions, 341 flow [2023-11-19 07:39:58,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 63 transitions, 333 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-11-19 07:39:58,175 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 161 flow [2023-11-19 07:39:58,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=161, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-11-19 07:39:58,177 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-11-19 07:39:58,181 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 161 flow [2023-11-19 07:39:58,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:58,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:58,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:58,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:39:58,183 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 07:39:58,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:58,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1398477230, now seen corresponding path program 2 times [2023-11-19 07:39:58,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:58,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071554637] [2023-11-19 07:39:58,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:58,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:58,328 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 07:39:58,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:58,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071554637] [2023-11-19 07:39:58,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071554637] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:58,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:58,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:39:58,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512632114] [2023-11-19 07:39:58,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:58,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:39:58,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:58,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:39:58,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:39:58,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 219 [2023-11-19 07:39:58,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 161 flow. Second operand has 5 states, 5 states have (on average 105.2) internal successors, (526), 5 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:58,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:58,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 219 [2023-11-19 07:39:58,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:58,959 INFO L124 PetriNetUnfolderBase]: 3023/4043 cut-off events. [2023-11-19 07:39:58,959 INFO L125 PetriNetUnfolderBase]: For 2982/2982 co-relation queries the response was YES. [2023-11-19 07:39:58,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11642 conditions, 4043 events. 3023/4043 cut-off events. For 2982/2982 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15543 event pairs, 1274 based on Foata normal form. 46/4089 useless extension candidates. Maximal degree in co-relation 6713. Up to 2665 conditions per place. [2023-11-19 07:39:59,006 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 80 selfloop transitions, 11 changer transitions 0/91 dead transitions. [2023-11-19 07:39:59,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 91 transitions, 513 flow [2023-11-19 07:39:59,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:39:59,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:39:59,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 574 transitions. [2023-11-19 07:39:59,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5242009132420091 [2023-11-19 07:39:59,011 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 574 transitions. [2023-11-19 07:39:59,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 574 transitions. [2023-11-19 07:39:59,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:59,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 574 transitions. [2023-11-19 07:39:59,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.8) internal successors, (574), 5 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:59,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:59,020 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:59,020 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 161 flow. Second operand 5 states and 574 transitions. [2023-11-19 07:39:59,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 91 transitions, 513 flow [2023-11-19 07:39:59,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 91 transitions, 499 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:39:59,049 INFO L231 Difference]: Finished difference. Result has 46 places, 48 transitions, 248 flow [2023-11-19 07:39:59,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=46, PETRI_TRANSITIONS=48} [2023-11-19 07:39:59,052 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 8 predicate places. [2023-11-19 07:39:59,052 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 48 transitions, 248 flow [2023-11-19 07:39:59,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.2) internal successors, (526), 5 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:59,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:59,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:59,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:39:59,054 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 07:39:59,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:59,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1996742408, now seen corresponding path program 3 times [2023-11-19 07:39:59,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:59,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084693835] [2023-11-19 07:39:59,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:59,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:59,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:59,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084693835] [2023-11-19 07:39:59,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084693835] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:39:59,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224581901] [2023-11-19 07:39:59,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:39:59,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:59,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:59,216 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:59,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:39:59,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:39:59,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:39:59,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:39:59,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:59,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:59,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:59,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224581901] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:39:59,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:39:59,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-19 07:39:59,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084470304] [2023-11-19 07:39:59,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:39:59,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:39:59,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:59,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:39:59,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:39:59,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 219 [2023-11-19 07:39:59,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 48 transitions, 248 flow. Second operand has 8 states, 8 states have (on average 103.125) internal successors, (825), 8 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:59,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:59,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 219 [2023-11-19 07:39:59,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:00,569 INFO L124 PetriNetUnfolderBase]: 3247/4337 cut-off events. [2023-11-19 07:40:00,569 INFO L125 PetriNetUnfolderBase]: For 5174/5174 co-relation queries the response was YES. [2023-11-19 07:40:00,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14364 conditions, 4337 events. 3247/4337 cut-off events. For 5174/5174 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 17277 event pairs, 781 based on Foata normal form. 70/4407 useless extension candidates. Maximal degree in co-relation 9000. Up to 1614 conditions per place. [2023-11-19 07:40:00,622 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 113 selfloop transitions, 19 changer transitions 0/132 dead transitions. [2023-11-19 07:40:00,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 132 transitions, 789 flow [2023-11-19 07:40:00,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:40:00,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:40:00,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 808 transitions. [2023-11-19 07:40:00,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5270711024135681 [2023-11-19 07:40:00,628 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 808 transitions. [2023-11-19 07:40:00,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 808 transitions. [2023-11-19 07:40:00,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:00,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 808 transitions. [2023-11-19 07:40:00,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 115.42857142857143) internal successors, (808), 7 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:00,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:00,643 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:00,643 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 248 flow. Second operand 7 states and 808 transitions. [2023-11-19 07:40:00,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 132 transitions, 789 flow [2023-11-19 07:40:00,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 132 transitions, 779 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-11-19 07:40:00,669 INFO L231 Difference]: Finished difference. Result has 54 places, 53 transitions, 334 flow [2023-11-19 07:40:00,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=334, PETRI_PLACES=54, PETRI_TRANSITIONS=53} [2023-11-19 07:40:00,673 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 16 predicate places. [2023-11-19 07:40:00,674 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 53 transitions, 334 flow [2023-11-19 07:40:00,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 103.125) internal successors, (825), 8 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:00,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:00,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:00,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:00,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:00,901 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 07:40:00,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:00,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1503425030, now seen corresponding path program 4 times [2023-11-19 07:40:00,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:00,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775855904] [2023-11-19 07:40:00,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:00,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:00,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:01,041 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 07:40:01,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:01,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775855904] [2023-11-19 07:40:01,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775855904] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:01,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:01,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:40:01,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074825572] [2023-11-19 07:40:01,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:01,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:01,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:01,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:01,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:01,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 219 [2023-11-19 07:40:01,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 334 flow. Second operand has 5 states, 5 states have (on average 106.2) internal successors, (531), 5 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:01,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:01,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 219 [2023-11-19 07:40:01,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:01,968 INFO L124 PetriNetUnfolderBase]: 3397/4583 cut-off events. [2023-11-19 07:40:01,969 INFO L125 PetriNetUnfolderBase]: For 9090/9090 co-relation queries the response was YES. [2023-11-19 07:40:01,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16194 conditions, 4583 events. 3397/4583 cut-off events. For 9090/9090 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18894 event pairs, 680 based on Foata normal form. 46/4629 useless extension candidates. Maximal degree in co-relation 10829. Up to 1604 conditions per place. [2023-11-19 07:40:02,009 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 96 selfloop transitions, 12 changer transitions 0/108 dead transitions. [2023-11-19 07:40:02,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 108 transitions, 727 flow [2023-11-19 07:40:02,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:40:02,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:40:02,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 587 transitions. [2023-11-19 07:40:02,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5360730593607306 [2023-11-19 07:40:02,014 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 587 transitions. [2023-11-19 07:40:02,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 587 transitions. [2023-11-19 07:40:02,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:02,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 587 transitions. [2023-11-19 07:40:02,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.4) internal successors, (587), 5 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:02,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:02,022 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:02,022 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 334 flow. Second operand 5 states and 587 transitions. [2023-11-19 07:40:02,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 108 transitions, 727 flow [2023-11-19 07:40:02,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 108 transitions, 686 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-19 07:40:02,108 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 350 flow [2023-11-19 07:40:02,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=350, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2023-11-19 07:40:02,110 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 20 predicate places. [2023-11-19 07:40:02,110 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 350 flow [2023-11-19 07:40:02,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 106.2) internal successors, (531), 5 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:02,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:02,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:02,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:40:02,112 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 07:40:02,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:02,113 INFO L85 PathProgramCache]: Analyzing trace with hash -581389621, now seen corresponding path program 1 times [2023-11-19 07:40:02,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:02,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542746657] [2023-11-19 07:40:02,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:02,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:02,243 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 07:40:02,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:02,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542746657] [2023-11-19 07:40:02,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542746657] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:02,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:02,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:40:02,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977629242] [2023-11-19 07:40:02,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:02,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:02,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:02,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:02,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:02,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 219 [2023-11-19 07:40:02,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 350 flow. Second operand has 5 states, 5 states have (on average 106.2) internal successors, (531), 5 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:02,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:02,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 219 [2023-11-19 07:40:02,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:03,196 INFO L124 PetriNetUnfolderBase]: 3572/4834 cut-off events. [2023-11-19 07:40:03,196 INFO L125 PetriNetUnfolderBase]: For 12939/12939 co-relation queries the response was YES. [2023-11-19 07:40:03,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17123 conditions, 4834 events. 3572/4834 cut-off events. For 12939/12939 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 19879 event pairs, 1128 based on Foata normal form. 76/4910 useless extension candidates. Maximal degree in co-relation 11826. Up to 2466 conditions per place. [2023-11-19 07:40:03,226 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 92 selfloop transitions, 17 changer transitions 0/109 dead transitions. [2023-11-19 07:40:03,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 109 transitions, 749 flow [2023-11-19 07:40:03,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:40:03,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:40:03,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 588 transitions. [2023-11-19 07:40:03,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.536986301369863 [2023-11-19 07:40:03,230 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 588 transitions. [2023-11-19 07:40:03,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 588 transitions. [2023-11-19 07:40:03,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:03,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 588 transitions. [2023-11-19 07:40:03,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.6) internal successors, (588), 5 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:03,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:03,236 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:03,236 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 350 flow. Second operand 5 states and 588 transitions. [2023-11-19 07:40:03,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 109 transitions, 749 flow [2023-11-19 07:40:03,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 109 transitions, 722 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-19 07:40:03,304 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 385 flow [2023-11-19 07:40:03,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=385, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2023-11-19 07:40:03,305 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 24 predicate places. [2023-11-19 07:40:03,306 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 385 flow [2023-11-19 07:40:03,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 106.2) internal successors, (531), 5 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:03,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:03,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:03,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:40:03,307 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 07:40:03,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:03,308 INFO L85 PathProgramCache]: Analyzing trace with hash 2047899571, now seen corresponding path program 2 times [2023-11-19 07:40:03,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:03,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515887487] [2023-11-19 07:40:03,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:03,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:03,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:03,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515887487] [2023-11-19 07:40:03,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515887487] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:03,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622912866] [2023-11-19 07:40:03,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:40:03,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:03,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:03,401 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:03,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:40:03,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:40:03,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:40:03,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:40:03,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:03,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:03,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:03,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622912866] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:03,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:40:03,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-19 07:40:03,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097135064] [2023-11-19 07:40:03,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:03,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:40:03,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:03,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:40:03,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:40:03,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 219 [2023-11-19 07:40:03,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 385 flow. Second operand has 8 states, 8 states have (on average 103.375) internal successors, (827), 8 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:03,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:03,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 219 [2023-11-19 07:40:03,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:04,614 INFO L124 PetriNetUnfolderBase]: 5326/7176 cut-off events. [2023-11-19 07:40:04,614 INFO L125 PetriNetUnfolderBase]: For 22588/22588 co-relation queries the response was YES. [2023-11-19 07:40:04,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27298 conditions, 7176 events. 5326/7176 cut-off events. For 22588/22588 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 31097 event pairs, 1115 based on Foata normal form. 150/7326 useless extension candidates. Maximal degree in co-relation 18433. Up to 2588 conditions per place. [2023-11-19 07:40:04,663 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 236 selfloop transitions, 12 changer transitions 0/248 dead transitions. [2023-11-19 07:40:04,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 248 transitions, 2359 flow [2023-11-19 07:40:04,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:40:04,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:40:04,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 806 transitions. [2023-11-19 07:40:04,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257664709719504 [2023-11-19 07:40:04,667 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 806 transitions. [2023-11-19 07:40:04,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 806 transitions. [2023-11-19 07:40:04,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:04,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 806 transitions. [2023-11-19 07:40:04,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 115.14285714285714) internal successors, (806), 7 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:04,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:04,675 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:04,675 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 385 flow. Second operand 7 states and 806 transitions. [2023-11-19 07:40:04,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 248 transitions, 2359 flow [2023-11-19 07:40:04,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 248 transitions, 2239 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:40:04,713 INFO L231 Difference]: Finished difference. Result has 71 places, 64 transitions, 445 flow [2023-11-19 07:40:04,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=445, PETRI_PLACES=71, PETRI_TRANSITIONS=64} [2023-11-19 07:40:04,714 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 33 predicate places. [2023-11-19 07:40:04,714 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 64 transitions, 445 flow [2023-11-19 07:40:04,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 103.375) internal successors, (827), 8 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:04,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:04,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:04,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:04,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 07:40:04,941 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 07:40:04,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:04,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1319819673, now seen corresponding path program 1 times [2023-11-19 07:40:04,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:04,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94522339] [2023-11-19 07:40:04,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:04,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:05,025 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 07:40:05,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:05,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94522339] [2023-11-19 07:40:05,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94522339] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:05,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:05,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:40:05,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4342874] [2023-11-19 07:40:05,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:05,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:40:05,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:05,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:40:05,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:40:05,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 219 [2023-11-19 07:40:05,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 445 flow. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:05,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:05,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 219 [2023-11-19 07:40:05,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:05,858 INFO L124 PetriNetUnfolderBase]: 4456/6080 cut-off events. [2023-11-19 07:40:05,859 INFO L125 PetriNetUnfolderBase]: For 25215/25215 co-relation queries the response was YES. [2023-11-19 07:40:05,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27554 conditions, 6080 events. 4456/6080 cut-off events. For 25215/25215 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 25812 event pairs, 1558 based on Foata normal form. 236/6316 useless extension candidates. Maximal degree in co-relation 18160. Up to 3046 conditions per place. [2023-11-19 07:40:05,917 INFO L140 encePairwiseOnDemand]: 216/219 looper letters, 94 selfloop transitions, 3 changer transitions 2/99 dead transitions. [2023-11-19 07:40:05,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 99 transitions, 886 flow [2023-11-19 07:40:05,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:40:05,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:40:05,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-11-19 07:40:05,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5799086757990868 [2023-11-19 07:40:05,920 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-11-19 07:40:05,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-11-19 07:40:05,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:05,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-11-19 07:40:05,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:05,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:05,925 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:05,926 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 445 flow. Second operand 3 states and 381 transitions. [2023-11-19 07:40:05,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 99 transitions, 886 flow [2023-11-19 07:40:06,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 99 transitions, 874 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-19 07:40:06,028 INFO L231 Difference]: Finished difference. Result has 73 places, 61 transitions, 424 flow [2023-11-19 07:40:06,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=424, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2023-11-19 07:40:06,029 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 35 predicate places. [2023-11-19 07:40:06,029 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 424 flow [2023-11-19 07:40:06,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:06,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:06,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:06,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:40:06,031 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 07:40:06,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:06,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1791940509, now seen corresponding path program 3 times [2023-11-19 07:40:06,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:06,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875674877] [2023-11-19 07:40:06,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:06,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:06,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:06,145 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 07:40:06,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:06,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875674877] [2023-11-19 07:40:06,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875674877] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:06,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:06,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:40:06,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605969428] [2023-11-19 07:40:06,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:06,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:06,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:06,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:06,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:06,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 219 [2023-11-19 07:40:06,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 61 transitions, 424 flow. Second operand has 5 states, 5 states have (on average 105.2) internal successors, (526), 5 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:06,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:06,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 219 [2023-11-19 07:40:06,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:07,019 INFO L124 PetriNetUnfolderBase]: 4606/6278 cut-off events. [2023-11-19 07:40:07,019 INFO L125 PetriNetUnfolderBase]: For 25527/25527 co-relation queries the response was YES. [2023-11-19 07:40:07,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28518 conditions, 6278 events. 4606/6278 cut-off events. For 25527/25527 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 26687 event pairs, 2145 based on Foata normal form. 48/6326 useless extension candidates. Maximal degree in co-relation 18926. Up to 5076 conditions per place. [2023-11-19 07:40:07,078 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 73 selfloop transitions, 21 changer transitions 18/112 dead transitions. [2023-11-19 07:40:07,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 112 transitions, 962 flow [2023-11-19 07:40:07,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:40:07,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:40:07,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 570 transitions. [2023-11-19 07:40:07,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5205479452054794 [2023-11-19 07:40:07,082 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 570 transitions. [2023-11-19 07:40:07,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 570 transitions. [2023-11-19 07:40:07,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:07,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 570 transitions. [2023-11-19 07:40:07,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:07,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:07,088 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:07,088 INFO L175 Difference]: Start difference. First operand has 73 places, 61 transitions, 424 flow. Second operand 5 states and 570 transitions. [2023-11-19 07:40:07,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 112 transitions, 962 flow [2023-11-19 07:40:07,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 112 transitions, 936 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-19 07:40:07,235 INFO L231 Difference]: Finished difference. Result has 77 places, 67 transitions, 534 flow [2023-11-19 07:40:07,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=534, PETRI_PLACES=77, PETRI_TRANSITIONS=67} [2023-11-19 07:40:07,236 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 39 predicate places. [2023-11-19 07:40:07,236 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 67 transitions, 534 flow [2023-11-19 07:40:07,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.2) internal successors, (526), 5 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:07,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:07,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:07,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:40:07,238 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 07:40:07,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:07,238 INFO L85 PathProgramCache]: Analyzing trace with hash -845606775, now seen corresponding path program 4 times [2023-11-19 07:40:07,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:07,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954711328] [2023-11-19 07:40:07,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:07,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:07,332 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 07:40:07,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:07,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954711328] [2023-11-19 07:40:07,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954711328] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:07,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:07,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:40:07,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86598544] [2023-11-19 07:40:07,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:07,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:07,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:07,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:07,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:07,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 219 [2023-11-19 07:40:07,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 67 transitions, 534 flow. Second operand has 5 states, 5 states have (on average 105.2) internal successors, (526), 5 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:07,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:07,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 219 [2023-11-19 07:40:07,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:08,151 INFO L124 PetriNetUnfolderBase]: 4415/6039 cut-off events. [2023-11-19 07:40:08,151 INFO L125 PetriNetUnfolderBase]: For 28839/28839 co-relation queries the response was YES. [2023-11-19 07:40:08,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28631 conditions, 6039 events. 4415/6039 cut-off events. For 28839/28839 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 25664 event pairs, 1923 based on Foata normal form. 48/6087 useless extension candidates. Maximal degree in co-relation 20319. Up to 4994 conditions per place. [2023-11-19 07:40:08,211 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 92 selfloop transitions, 15 changer transitions 18/125 dead transitions. [2023-11-19 07:40:08,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 125 transitions, 1211 flow [2023-11-19 07:40:08,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:40:08,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:40:08,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 570 transitions. [2023-11-19 07:40:08,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5205479452054794 [2023-11-19 07:40:08,215 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 570 transitions. [2023-11-19 07:40:08,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 570 transitions. [2023-11-19 07:40:08,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:08,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 570 transitions. [2023-11-19 07:40:08,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:08,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:08,221 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:08,222 INFO L175 Difference]: Start difference. First operand has 77 places, 67 transitions, 534 flow. Second operand 5 states and 570 transitions. [2023-11-19 07:40:08,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 125 transitions, 1211 flow [2023-11-19 07:40:08,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 125 transitions, 1163 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-11-19 07:40:08,383 INFO L231 Difference]: Finished difference. Result has 79 places, 75 transitions, 662 flow [2023-11-19 07:40:08,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=662, PETRI_PLACES=79, PETRI_TRANSITIONS=75} [2023-11-19 07:40:08,383 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 41 predicate places. [2023-11-19 07:40:08,384 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 75 transitions, 662 flow [2023-11-19 07:40:08,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.2) internal successors, (526), 5 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:08,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:08,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:08,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:40:08,385 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 07:40:08,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:08,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1419958803, now seen corresponding path program 5 times [2023-11-19 07:40:08,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:08,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571472413] [2023-11-19 07:40:08,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:08,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:08,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:08,470 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 07:40:08,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:08,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571472413] [2023-11-19 07:40:08,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571472413] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:08,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:08,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:40:08,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192161622] [2023-11-19 07:40:08,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:08,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:08,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:08,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:08,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:08,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 219 [2023-11-19 07:40:08,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 75 transitions, 662 flow. Second operand has 5 states, 5 states have (on average 106.2) internal successors, (531), 5 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:08,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:08,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 219 [2023-11-19 07:40:08,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:09,261 INFO L124 PetriNetUnfolderBase]: 4560/6256 cut-off events. [2023-11-19 07:40:09,262 INFO L125 PetriNetUnfolderBase]: For 28139/28139 co-relation queries the response was YES. [2023-11-19 07:40:09,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29858 conditions, 6256 events. 4560/6256 cut-off events. For 28139/28139 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 27382 event pairs, 925 based on Foata normal form. 120/6376 useless extension candidates. Maximal degree in co-relation 21031. Up to 3034 conditions per place. [2023-11-19 07:40:09,313 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 130 selfloop transitions, 14 changer transitions 9/153 dead transitions. [2023-11-19 07:40:09,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 153 transitions, 1533 flow [2023-11-19 07:40:09,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:40:09,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:40:09,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 582 transitions. [2023-11-19 07:40:09,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5315068493150685 [2023-11-19 07:40:09,317 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 582 transitions. [2023-11-19 07:40:09,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 582 transitions. [2023-11-19 07:40:09,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:09,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 582 transitions. [2023-11-19 07:40:09,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.4) internal successors, (582), 5 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:09,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:09,324 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:09,324 INFO L175 Difference]: Start difference. First operand has 79 places, 75 transitions, 662 flow. Second operand 5 states and 582 transitions. [2023-11-19 07:40:09,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 153 transitions, 1533 flow [2023-11-19 07:40:09,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 153 transitions, 1511 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-19 07:40:09,496 INFO L231 Difference]: Finished difference. Result has 82 places, 80 transitions, 767 flow [2023-11-19 07:40:09,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=767, PETRI_PLACES=82, PETRI_TRANSITIONS=80} [2023-11-19 07:40:09,498 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 44 predicate places. [2023-11-19 07:40:09,498 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 80 transitions, 767 flow [2023-11-19 07:40:09,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 106.2) internal successors, (531), 5 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:09,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:09,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:09,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:40:09,499 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 07:40:09,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:09,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1860202576, now seen corresponding path program 5 times [2023-11-19 07:40:09,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:09,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133711870] [2023-11-19 07:40:09,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:09,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:09,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:09,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:09,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:09,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133711870] [2023-11-19 07:40:09,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133711870] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:09,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735751474] [2023-11-19 07:40:09,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:40:09,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:09,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:09,632 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:09,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:40:09,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:40:09,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:40:09,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:40:09,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:09,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:09,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735751474] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:09,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:40:09,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-19 07:40:09,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693602729] [2023-11-19 07:40:09,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:09,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:40:09,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:09,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:40:09,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:40:09,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 219 [2023-11-19 07:40:09,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 80 transitions, 767 flow. Second operand has 10 states, 10 states have (on average 103.0) internal successors, (1030), 10 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:09,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:09,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 219 [2023-11-19 07:40:09,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:11,118 INFO L124 PetriNetUnfolderBase]: 5292/7220 cut-off events. [2023-11-19 07:40:11,118 INFO L125 PetriNetUnfolderBase]: For 35619/35619 co-relation queries the response was YES. [2023-11-19 07:40:11,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34934 conditions, 7220 events. 5292/7220 cut-off events. For 35619/35619 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 32091 event pairs, 1436 based on Foata normal form. 126/7346 useless extension candidates. Maximal degree in co-relation 27518. Up to 3623 conditions per place. [2023-11-19 07:40:11,160 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 202 selfloop transitions, 42 changer transitions 0/244 dead transitions. [2023-11-19 07:40:11,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 244 transitions, 2240 flow [2023-11-19 07:40:11,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:40:11,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 07:40:11,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1138 transitions. [2023-11-19 07:40:11,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5196347031963471 [2023-11-19 07:40:11,166 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1138 transitions. [2023-11-19 07:40:11,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1138 transitions. [2023-11-19 07:40:11,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:11,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1138 transitions. [2023-11-19 07:40:11,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 113.8) internal successors, (1138), 10 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:11,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 219.0) internal successors, (2409), 11 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:11,176 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 219.0) internal successors, (2409), 11 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:11,176 INFO L175 Difference]: Start difference. First operand has 82 places, 80 transitions, 767 flow. Second operand 10 states and 1138 transitions. [2023-11-19 07:40:11,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 244 transitions, 2240 flow [2023-11-19 07:40:11,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 244 transitions, 2180 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-19 07:40:11,357 INFO L231 Difference]: Finished difference. Result has 93 places, 87 transitions, 918 flow [2023-11-19 07:40:11,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=918, PETRI_PLACES=93, PETRI_TRANSITIONS=87} [2023-11-19 07:40:11,358 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 55 predicate places. [2023-11-19 07:40:11,358 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 87 transitions, 918 flow [2023-11-19 07:40:11,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 103.0) internal successors, (1030), 10 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:11,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:11,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:11,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:11,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:11,580 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 07:40:11,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:11,581 INFO L85 PathProgramCache]: Analyzing trace with hash -366663565, now seen corresponding path program 6 times [2023-11-19 07:40:11,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:11,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535412560] [2023-11-19 07:40:11,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:11,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:11,695 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 07:40:11,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:11,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535412560] [2023-11-19 07:40:11,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535412560] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:11,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:11,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:40:11,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649013928] [2023-11-19 07:40:11,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:11,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:11,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:11,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:11,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:11,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 219 [2023-11-19 07:40:11,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 87 transitions, 918 flow. Second operand has 5 states, 5 states have (on average 105.2) internal successors, (526), 5 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:11,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:11,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 219 [2023-11-19 07:40:11,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:12,681 INFO L124 PetriNetUnfolderBase]: 5580/7628 cut-off events. [2023-11-19 07:40:12,682 INFO L125 PetriNetUnfolderBase]: For 49605/49605 co-relation queries the response was YES. [2023-11-19 07:40:12,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39304 conditions, 7628 events. 5580/7628 cut-off events. For 49605/49605 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 33938 event pairs, 2410 based on Foata normal form. 120/7748 useless extension candidates. Maximal degree in co-relation 37041. Up to 5941 conditions per place. [2023-11-19 07:40:12,752 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 91 selfloop transitions, 34 changer transitions 5/130 dead transitions. [2023-11-19 07:40:12,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 130 transitions, 1451 flow [2023-11-19 07:40:12,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:40:12,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:40:12,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 568 transitions. [2023-11-19 07:40:12,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5187214611872146 [2023-11-19 07:40:12,755 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 568 transitions. [2023-11-19 07:40:12,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 568 transitions. [2023-11-19 07:40:12,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:12,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 568 transitions. [2023-11-19 07:40:12,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:12,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:12,762 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:12,762 INFO L175 Difference]: Start difference. First operand has 93 places, 87 transitions, 918 flow. Second operand 5 states and 568 transitions. [2023-11-19 07:40:12,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 130 transitions, 1451 flow [2023-11-19 07:40:12,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 130 transitions, 1339 flow, removed 11 selfloop flow, removed 5 redundant places. [2023-11-19 07:40:13,000 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 915 flow [2023-11-19 07:40:13,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=915, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2023-11-19 07:40:13,001 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 54 predicate places. [2023-11-19 07:40:13,001 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 915 flow [2023-11-19 07:40:13,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.2) internal successors, (526), 5 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:13,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:13,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:13,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 07:40:13,002 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:40:13,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:13,002 INFO L85 PathProgramCache]: Analyzing trace with hash 58169575, now seen corresponding path program 7 times [2023-11-19 07:40:13,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:13,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479788340] [2023-11-19 07:40:13,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:13,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:13,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:13,094 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 07:40:13,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:13,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479788340] [2023-11-19 07:40:13,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479788340] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:13,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:13,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:40:13,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526598604] [2023-11-19 07:40:13,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:13,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:13,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:13,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:13,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:13,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 219 [2023-11-19 07:40:13,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 915 flow. Second operand has 5 states, 5 states have (on average 105.2) internal successors, (526), 5 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:13,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:13,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 219 [2023-11-19 07:40:13,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:14,220 INFO L124 PetriNetUnfolderBase]: 5086/6962 cut-off events. [2023-11-19 07:40:14,220 INFO L125 PetriNetUnfolderBase]: For 42203/42203 co-relation queries the response was YES. [2023-11-19 07:40:14,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34352 conditions, 6962 events. 5086/6962 cut-off events. For 42203/42203 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 30787 event pairs, 2152 based on Foata normal form. 120/7082 useless extension candidates. Maximal degree in co-relation 32169. Up to 5505 conditions per place. [2023-11-19 07:40:14,274 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 111 selfloop transitions, 17 changer transitions 15/143 dead transitions. [2023-11-19 07:40:14,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 143 transitions, 1563 flow [2023-11-19 07:40:14,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:40:14,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:40:14,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 568 transitions. [2023-11-19 07:40:14,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5187214611872146 [2023-11-19 07:40:14,277 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 568 transitions. [2023-11-19 07:40:14,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 568 transitions. [2023-11-19 07:40:14,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:14,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 568 transitions. [2023-11-19 07:40:14,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:14,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:14,284 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:14,284 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 915 flow. Second operand 5 states and 568 transitions. [2023-11-19 07:40:14,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 143 transitions, 1563 flow [2023-11-19 07:40:14,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 143 transitions, 1485 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-19 07:40:14,452 INFO L231 Difference]: Finished difference. Result has 93 places, 80 transitions, 746 flow [2023-11-19 07:40:14,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=746, PETRI_PLACES=93, PETRI_TRANSITIONS=80} [2023-11-19 07:40:14,453 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 55 predicate places. [2023-11-19 07:40:14,453 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 80 transitions, 746 flow [2023-11-19 07:40:14,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.2) internal successors, (526), 5 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:14,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:14,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:14,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-19 07:40:14,455 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:40:14,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:14,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1002457662, now seen corresponding path program 6 times [2023-11-19 07:40:14,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:14,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293267027] [2023-11-19 07:40:14,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:14,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:14,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:14,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293267027] [2023-11-19 07:40:14,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293267027] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:14,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011537438] [2023-11-19 07:40:14,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:40:14,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:14,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:14,553 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:14,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:40:14,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-19 07:40:14,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:40:14,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:40:14,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:14,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:14,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:14,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011537438] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:14,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:40:14,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-19 07:40:14,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402836470] [2023-11-19 07:40:14,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:14,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:40:14,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:14,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:40:14,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:40:14,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 219 [2023-11-19 07:40:14,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 80 transitions, 746 flow. Second operand has 10 states, 10 states have (on average 102.8) internal successors, (1028), 10 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:14,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:14,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 219 [2023-11-19 07:40:14,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:15,685 INFO L124 PetriNetUnfolderBase]: 3922/5285 cut-off events. [2023-11-19 07:40:15,685 INFO L125 PetriNetUnfolderBase]: For 29866/29866 co-relation queries the response was YES. [2023-11-19 07:40:15,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26062 conditions, 5285 events. 3922/5285 cut-off events. For 29866/29866 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 21877 event pairs, 993 based on Foata normal form. 126/5411 useless extension candidates. Maximal degree in co-relation 23915. Up to 2681 conditions per place. [2023-11-19 07:40:15,727 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 145 selfloop transitions, 22 changer transitions 1/168 dead transitions. [2023-11-19 07:40:15,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 168 transitions, 1659 flow [2023-11-19 07:40:15,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:40:15,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:40:15,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 683 transitions. [2023-11-19 07:40:15,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5197869101978692 [2023-11-19 07:40:15,734 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 683 transitions. [2023-11-19 07:40:15,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 683 transitions. [2023-11-19 07:40:15,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:15,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 683 transitions. [2023-11-19 07:40:15,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 113.83333333333333) internal successors, (683), 6 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:15,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 219.0) internal successors, (1533), 7 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:15,743 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 219.0) internal successors, (1533), 7 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:15,743 INFO L175 Difference]: Start difference. First operand has 93 places, 80 transitions, 746 flow. Second operand 6 states and 683 transitions. [2023-11-19 07:40:15,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 168 transitions, 1659 flow [2023-11-19 07:40:15,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 168 transitions, 1552 flow, removed 17 selfloop flow, removed 7 redundant places. [2023-11-19 07:40:15,865 INFO L231 Difference]: Finished difference. Result has 88 places, 81 transitions, 743 flow [2023-11-19 07:40:15,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=743, PETRI_PLACES=88, PETRI_TRANSITIONS=81} [2023-11-19 07:40:15,866 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 50 predicate places. [2023-11-19 07:40:15,866 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 81 transitions, 743 flow [2023-11-19 07:40:15,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 102.8) internal successors, (1028), 10 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:15,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:15,867 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] [2023-11-19 07:40:15,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:16,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:16,089 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:40:16,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:16,089 INFO L85 PathProgramCache]: Analyzing trace with hash 2012774091, now seen corresponding path program 1 times [2023-11-19 07:40:16,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:16,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139559408] [2023-11-19 07:40:16,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:16,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:16,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:16,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:16,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139559408] [2023-11-19 07:40:16,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139559408] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:16,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564176943] [2023-11-19 07:40:16,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:16,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:16,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:16,178 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:16,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:40:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:16,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:40:16,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:16,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:16,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:16,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564176943] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:16,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:40:16,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-19 07:40:16,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547313060] [2023-11-19 07:40:16,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:16,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:40:16,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:16,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:40:16,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:40:16,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 219 [2023-11-19 07:40:16,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 81 transitions, 743 flow. Second operand has 8 states, 8 states have (on average 103.5) internal successors, (828), 8 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:16,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:16,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 219 [2023-11-19 07:40:16,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:17,496 INFO L124 PetriNetUnfolderBase]: 4293/5770 cut-off events. [2023-11-19 07:40:17,497 INFO L125 PetriNetUnfolderBase]: For 26800/26800 co-relation queries the response was YES. [2023-11-19 07:40:17,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28551 conditions, 5770 events. 4293/5770 cut-off events. For 26800/26800 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 24527 event pairs, 279 based on Foata normal form. 160/5930 useless extension candidates. Maximal degree in co-relation 25800. Up to 2391 conditions per place. [2023-11-19 07:40:17,560 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 138 selfloop transitions, 38 changer transitions 0/176 dead transitions. [2023-11-19 07:40:17,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 176 transitions, 1672 flow [2023-11-19 07:40:17,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:40:17,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:40:17,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 793 transitions. [2023-11-19 07:40:17,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5172863666014351 [2023-11-19 07:40:17,589 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 793 transitions. [2023-11-19 07:40:17,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 793 transitions. [2023-11-19 07:40:17,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:17,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 793 transitions. [2023-11-19 07:40:17,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 113.28571428571429) internal successors, (793), 7 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 07:40:17,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:17,608 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:17,608 INFO L175 Difference]: Start difference. First operand has 88 places, 81 transitions, 743 flow. Second operand 7 states and 793 transitions. [2023-11-19 07:40:17,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 176 transitions, 1672 flow [2023-11-19 07:40:17,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 176 transitions, 1522 flow, removed 27 selfloop flow, removed 8 redundant places. [2023-11-19 07:40:17,721 INFO L231 Difference]: Finished difference. Result has 87 places, 90 transitions, 822 flow [2023-11-19 07:40:17,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=822, PETRI_PLACES=87, PETRI_TRANSITIONS=90} [2023-11-19 07:40:17,722 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 49 predicate places. [2023-11-19 07:40:17,723 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 90 transitions, 822 flow [2023-11-19 07:40:17,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 103.5) internal successors, (828), 8 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:17,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:17,724 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] [2023-11-19 07:40:17,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:17,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 07:40:17,926 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:40:17,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:17,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1275206321, now seen corresponding path program 2 times [2023-11-19 07:40:17,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:17,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561208547] [2023-11-19 07:40:17,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:17,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:17,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:18,054 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 07:40:18,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:18,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561208547] [2023-11-19 07:40:18,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561208547] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:18,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:18,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:40:18,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796308637] [2023-11-19 07:40:18,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:18,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:18,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:18,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:18,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:18,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 219 [2023-11-19 07:40:18,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 90 transitions, 822 flow. Second operand has 5 states, 5 states have (on average 106.4) internal successors, (532), 5 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:18,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:18,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 219 [2023-11-19 07:40:18,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:19,011 INFO L124 PetriNetUnfolderBase]: 4304/5805 cut-off events. [2023-11-19 07:40:19,011 INFO L125 PetriNetUnfolderBase]: For 28095/28095 co-relation queries the response was YES. [2023-11-19 07:40:19,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28081 conditions, 5805 events. 4304/5805 cut-off events. For 28095/28095 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 24293 event pairs, 1094 based on Foata normal form. 24/5829 useless extension candidates. Maximal degree in co-relation 25603. Up to 3658 conditions per place. [2023-11-19 07:40:19,057 INFO L140 encePairwiseOnDemand]: 214/219 looper letters, 143 selfloop transitions, 13 changer transitions 9/165 dead transitions. [2023-11-19 07:40:19,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 165 transitions, 1649 flow [2023-11-19 07:40:19,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:40:19,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:40:19,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 577 transitions. [2023-11-19 07:40:19,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5269406392694064 [2023-11-19 07:40:19,061 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 577 transitions. [2023-11-19 07:40:19,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 577 transitions. [2023-11-19 07:40:19,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:19,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 577 transitions. [2023-11-19 07:40:19,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.4) internal successors, (577), 5 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:19,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:19,066 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:19,067 INFO L175 Difference]: Start difference. First operand has 87 places, 90 transitions, 822 flow. Second operand 5 states and 577 transitions. [2023-11-19 07:40:19,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 165 transitions, 1649 flow [2023-11-19 07:40:19,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 165 transitions, 1585 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-19 07:40:19,193 INFO L231 Difference]: Finished difference. Result has 91 places, 90 transitions, 807 flow [2023-11-19 07:40:19,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=807, PETRI_PLACES=91, PETRI_TRANSITIONS=90} [2023-11-19 07:40:19,193 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 53 predicate places. [2023-11-19 07:40:19,193 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 90 transitions, 807 flow [2023-11-19 07:40:19,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 106.4) internal successors, (532), 5 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:19,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:19,194 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] [2023-11-19 07:40:19,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-19 07:40:19,194 INFO L420 AbstractCegarLoop]: === Iteration 19 === 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 07:40:19,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:19,195 INFO L85 PathProgramCache]: Analyzing trace with hash 852259529, now seen corresponding path program 3 times [2023-11-19 07:40:19,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:19,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919370213] [2023-11-19 07:40:19,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:19,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:19,284 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 07:40:19,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:19,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919370213] [2023-11-19 07:40:19,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919370213] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:19,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:19,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:40:19,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773586691] [2023-11-19 07:40:19,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:19,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:19,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:19,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:19,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:19,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 219 [2023-11-19 07:40:19,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 90 transitions, 807 flow. Second operand has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:19,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:19,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 219 [2023-11-19 07:40:19,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:20,172 INFO L124 PetriNetUnfolderBase]: 4523/6108 cut-off events. [2023-11-19 07:40:20,172 INFO L125 PetriNetUnfolderBase]: For 32759/32759 co-relation queries the response was YES. [2023-11-19 07:40:20,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29984 conditions, 6108 events. 4523/6108 cut-off events. For 32759/32759 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25678 event pairs, 1553 based on Foata normal form. 48/6156 useless extension candidates. Maximal degree in co-relation 27462. Up to 4975 conditions per place. [2023-11-19 07:40:20,225 INFO L140 encePairwiseOnDemand]: 214/219 looper letters, 90 selfloop transitions, 48 changer transitions 10/148 dead transitions. [2023-11-19 07:40:20,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 148 transitions, 1607 flow [2023-11-19 07:40:20,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:40:20,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:40:20,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 558 transitions. [2023-11-19 07:40:20,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5095890410958904 [2023-11-19 07:40:20,229 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 558 transitions. [2023-11-19 07:40:20,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 558 transitions. [2023-11-19 07:40:20,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:20,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 558 transitions. [2023-11-19 07:40:20,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.6) internal successors, (558), 5 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:20,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:20,234 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:20,234 INFO L175 Difference]: Start difference. First operand has 91 places, 90 transitions, 807 flow. Second operand 5 states and 558 transitions. [2023-11-19 07:40:20,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 148 transitions, 1607 flow [2023-11-19 07:40:20,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 148 transitions, 1556 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-19 07:40:20,326 INFO L231 Difference]: Finished difference. Result has 93 places, 114 transitions, 1207 flow [2023-11-19 07:40:20,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1207, PETRI_PLACES=93, PETRI_TRANSITIONS=114} [2023-11-19 07:40:20,327 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 55 predicate places. [2023-11-19 07:40:20,327 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 114 transitions, 1207 flow [2023-11-19 07:40:20,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:20,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:20,328 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] [2023-11-19 07:40:20,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-19 07:40:20,328 INFO L420 AbstractCegarLoop]: === Iteration 20 === 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 07:40:20,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:20,328 INFO L85 PathProgramCache]: Analyzing trace with hash -635239433, now seen corresponding path program 4 times [2023-11-19 07:40:20,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:20,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409127883] [2023-11-19 07:40:20,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:20,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:20,412 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 07:40:20,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:20,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409127883] [2023-11-19 07:40:20,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409127883] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:20,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:20,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:40:20,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572055084] [2023-11-19 07:40:20,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:20,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:20,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:20,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:20,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:20,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 219 [2023-11-19 07:40:20,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 114 transitions, 1207 flow. Second operand has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:20,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:20,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 219 [2023-11-19 07:40:20,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:21,344 INFO L124 PetriNetUnfolderBase]: 4439/6006 cut-off events. [2023-11-19 07:40:21,344 INFO L125 PetriNetUnfolderBase]: For 32767/32767 co-relation queries the response was YES. [2023-11-19 07:40:21,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30730 conditions, 6006 events. 4439/6006 cut-off events. For 32767/32767 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 25244 event pairs, 1713 based on Foata normal form. 30/6036 useless extension candidates. Maximal degree in co-relation 28185. Up to 4975 conditions per place. [2023-11-19 07:40:21,390 INFO L140 encePairwiseOnDemand]: 214/219 looper letters, 89 selfloop transitions, 44 changer transitions 7/140 dead transitions. [2023-11-19 07:40:21,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 140 transitions, 1624 flow [2023-11-19 07:40:21,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:40:21,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:40:21,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 560 transitions. [2023-11-19 07:40:21,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5114155251141552 [2023-11-19 07:40:21,394 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 560 transitions. [2023-11-19 07:40:21,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 560 transitions. [2023-11-19 07:40:21,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:21,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 560 transitions. [2023-11-19 07:40:21,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:21,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:21,400 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:21,400 INFO L175 Difference]: Start difference. First operand has 93 places, 114 transitions, 1207 flow. Second operand 5 states and 560 transitions. [2023-11-19 07:40:21,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 140 transitions, 1624 flow [2023-11-19 07:40:21,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 140 transitions, 1580 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:40:21,523 INFO L231 Difference]: Finished difference. Result has 95 places, 113 transitions, 1241 flow [2023-11-19 07:40:21,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1241, PETRI_PLACES=95, PETRI_TRANSITIONS=113} [2023-11-19 07:40:21,524 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 57 predicate places. [2023-11-19 07:40:21,524 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 113 transitions, 1241 flow [2023-11-19 07:40:21,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:21,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:21,525 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] [2023-11-19 07:40:21,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-19 07:40:21,525 INFO L420 AbstractCegarLoop]: === Iteration 21 === 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 07:40:21,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:21,525 INFO L85 PathProgramCache]: Analyzing trace with hash -2015462953, now seen corresponding path program 5 times [2023-11-19 07:40:21,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:21,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413138507] [2023-11-19 07:40:21,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:21,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:21,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:21,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413138507] [2023-11-19 07:40:21,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413138507] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:21,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83992675] [2023-11-19 07:40:21,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:40:21,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:21,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:21,621 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:21,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:40:21,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:40:21,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:40:21,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:40:21,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:21,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:21,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83992675] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:21,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:40:21,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-19 07:40:21,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939268278] [2023-11-19 07:40:21,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:21,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:40:21,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:21,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:40:21,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:40:21,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 219 [2023-11-19 07:40:21,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 113 transitions, 1241 flow. Second operand has 10 states, 10 states have (on average 103.1) internal successors, (1031), 10 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:21,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:21,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 219 [2023-11-19 07:40:21,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:23,076 INFO L124 PetriNetUnfolderBase]: 5343/7200 cut-off events. [2023-11-19 07:40:23,077 INFO L125 PetriNetUnfolderBase]: For 39101/39101 co-relation queries the response was YES. [2023-11-19 07:40:23,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37533 conditions, 7200 events. 5343/7200 cut-off events. For 39101/39101 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 31192 event pairs, 999 based on Foata normal form. 160/7360 useless extension candidates. Maximal degree in co-relation 34170. Up to 3253 conditions per place. [2023-11-19 07:40:23,144 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 170 selfloop transitions, 72 changer transitions 0/242 dead transitions. [2023-11-19 07:40:23,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 242 transitions, 2559 flow [2023-11-19 07:40:23,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:40:23,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 07:40:23,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1119 transitions. [2023-11-19 07:40:23,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510958904109589 [2023-11-19 07:40:23,152 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1119 transitions. [2023-11-19 07:40:23,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1119 transitions. [2023-11-19 07:40:23,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:23,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1119 transitions. [2023-11-19 07:40:23,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 111.9) internal successors, (1119), 10 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:23,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 219.0) internal successors, (2409), 11 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:23,162 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 219.0) internal successors, (2409), 11 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:23,162 INFO L175 Difference]: Start difference. First operand has 95 places, 113 transitions, 1241 flow. Second operand 10 states and 1119 transitions. [2023-11-19 07:40:23,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 242 transitions, 2559 flow [2023-11-19 07:40:23,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 242 transitions, 2471 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:40:23,342 INFO L231 Difference]: Finished difference. Result has 104 places, 129 transitions, 1515 flow [2023-11-19 07:40:23,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1515, PETRI_PLACES=104, PETRI_TRANSITIONS=129} [2023-11-19 07:40:23,343 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 66 predicate places. [2023-11-19 07:40:23,343 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 129 transitions, 1515 flow [2023-11-19 07:40:23,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 103.1) internal successors, (1031), 10 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:23,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:23,344 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] [2023-11-19 07:40:23,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:23,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:23,564 INFO L420 AbstractCegarLoop]: === Iteration 22 === 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 07:40:23,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:23,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1203453393, now seen corresponding path program 6 times [2023-11-19 07:40:23,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:23,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588392853] [2023-11-19 07:40:23,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:23,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:23,641 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 07:40:23,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:23,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588392853] [2023-11-19 07:40:23,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588392853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:23,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:23,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:40:23,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764756854] [2023-11-19 07:40:23,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:23,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:23,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:23,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:23,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:23,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 219 [2023-11-19 07:40:23,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 129 transitions, 1515 flow. Second operand has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:23,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:23,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 219 [2023-11-19 07:40:23,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:24,847 INFO L124 PetriNetUnfolderBase]: 5313/7170 cut-off events. [2023-11-19 07:40:24,847 INFO L125 PetriNetUnfolderBase]: For 47823/47823 co-relation queries the response was YES. [2023-11-19 07:40:24,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39907 conditions, 7170 events. 5313/7170 cut-off events. For 47823/47823 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 30867 event pairs, 1333 based on Foata normal form. 30/7200 useless extension candidates. Maximal degree in co-relation 36328. Up to 4825 conditions per place. [2023-11-19 07:40:24,914 INFO L140 encePairwiseOnDemand]: 214/219 looper letters, 142 selfloop transitions, 23 changer transitions 7/172 dead transitions. [2023-11-19 07:40:24,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 172 transitions, 2145 flow [2023-11-19 07:40:24,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:40:24,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:40:24,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 562 transitions. [2023-11-19 07:40:24,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132420091324201 [2023-11-19 07:40:24,916 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 562 transitions. [2023-11-19 07:40:24,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 562 transitions. [2023-11-19 07:40:24,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:24,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 562 transitions. [2023-11-19 07:40:24,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.4) internal successors, (562), 5 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:24,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:24,921 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:24,921 INFO L175 Difference]: Start difference. First operand has 104 places, 129 transitions, 1515 flow. Second operand 5 states and 562 transitions. [2023-11-19 07:40:24,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 172 transitions, 2145 flow [2023-11-19 07:40:25,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 172 transitions, 1989 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-11-19 07:40:25,159 INFO L231 Difference]: Finished difference. Result has 104 places, 128 transitions, 1420 flow [2023-11-19 07:40:25,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1369, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1420, PETRI_PLACES=104, PETRI_TRANSITIONS=128} [2023-11-19 07:40:25,160 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 66 predicate places. [2023-11-19 07:40:25,160 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 128 transitions, 1420 flow [2023-11-19 07:40:25,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:25,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:25,160 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] [2023-11-19 07:40:25,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-19 07:40:25,161 INFO L420 AbstractCegarLoop]: === Iteration 23 === 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 07:40:25,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:25,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1335954765, now seen corresponding path program 7 times [2023-11-19 07:40:25,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:25,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860169284] [2023-11-19 07:40:25,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:25,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:25,240 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 07:40:25,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:25,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860169284] [2023-11-19 07:40:25,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860169284] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:25,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:25,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:40:25,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466870951] [2023-11-19 07:40:25,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:25,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:25,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:25,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:25,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:25,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 219 [2023-11-19 07:40:25,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 128 transitions, 1420 flow. Second operand has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:25,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:25,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 219 [2023-11-19 07:40:25,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:26,323 INFO L124 PetriNetUnfolderBase]: 4797/6456 cut-off events. [2023-11-19 07:40:26,324 INFO L125 PetriNetUnfolderBase]: For 44431/44431 co-relation queries the response was YES. [2023-11-19 07:40:26,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35217 conditions, 6456 events. 4797/6456 cut-off events. For 44431/44431 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27179 event pairs, 1157 based on Foata normal form. 160/6616 useless extension candidates. Maximal degree in co-relation 32104. Up to 4181 conditions per place. [2023-11-19 07:40:26,390 INFO L140 encePairwiseOnDemand]: 214/219 looper letters, 165 selfloop transitions, 22 changer transitions 1/188 dead transitions. [2023-11-19 07:40:26,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 188 transitions, 2177 flow [2023-11-19 07:40:26,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:40:26,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:40:26,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 570 transitions. [2023-11-19 07:40:26,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5205479452054794 [2023-11-19 07:40:26,392 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 570 transitions. [2023-11-19 07:40:26,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 570 transitions. [2023-11-19 07:40:26,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:26,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 570 transitions. [2023-11-19 07:40:26,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:26,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:26,396 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:26,396 INFO L175 Difference]: Start difference. First operand has 104 places, 128 transitions, 1420 flow. Second operand 5 states and 570 transitions. [2023-11-19 07:40:26,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 188 transitions, 2177 flow [2023-11-19 07:40:26,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 188 transitions, 2119 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-19 07:40:26,607 INFO L231 Difference]: Finished difference. Result has 103 places, 127 transitions, 1389 flow [2023-11-19 07:40:26,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1362, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1389, PETRI_PLACES=103, PETRI_TRANSITIONS=127} [2023-11-19 07:40:26,608 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 65 predicate places. [2023-11-19 07:40:26,608 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 127 transitions, 1389 flow [2023-11-19 07:40:26,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:26,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:26,609 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 07:40:26,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-19 07:40:26,609 INFO L420 AbstractCegarLoop]: === Iteration 24 === 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 07:40:26,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:26,610 INFO L85 PathProgramCache]: Analyzing trace with hash 370885687, now seen corresponding path program 1 times [2023-11-19 07:40:26,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:26,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641778955] [2023-11-19 07:40:26,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:26,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:26,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:40:26,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:26,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641778955] [2023-11-19 07:40:26,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641778955] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:26,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224100383] [2023-11-19 07:40:26,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:26,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:26,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:26,725 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:26,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:40:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:26,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:40:26,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:40:26,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:40:26,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224100383] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:26,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:40:26,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-19 07:40:26,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209481829] [2023-11-19 07:40:26,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:26,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:40:26,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:26,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:40:26,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:40:27,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 219 [2023-11-19 07:40:27,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 127 transitions, 1389 flow. Second operand has 8 states, 8 states have (on average 104.375) internal successors, (835), 8 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:27,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:27,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 219 [2023-11-19 07:40:27,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:28,315 INFO L124 PetriNetUnfolderBase]: 5851/7894 cut-off events. [2023-11-19 07:40:28,315 INFO L125 PetriNetUnfolderBase]: For 46676/46676 co-relation queries the response was YES. [2023-11-19 07:40:28,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42762 conditions, 7894 events. 5851/7894 cut-off events. For 46676/46676 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 35325 event pairs, 351 based on Foata normal form. 310/8204 useless extension candidates. Maximal degree in co-relation 38694. Up to 3793 conditions per place. [2023-11-19 07:40:28,414 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 152 selfloop transitions, 94 changer transitions 0/246 dead transitions. [2023-11-19 07:40:28,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 246 transitions, 2810 flow [2023-11-19 07:40:28,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:40:28,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:40:28,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 793 transitions. [2023-11-19 07:40:28,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5172863666014351 [2023-11-19 07:40:28,417 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 793 transitions. [2023-11-19 07:40:28,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 793 transitions. [2023-11-19 07:40:28,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:28,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 793 transitions. [2023-11-19 07:40:28,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 113.28571428571429) internal successors, (793), 7 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 07:40:28,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:28,423 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:28,423 INFO L175 Difference]: Start difference. First operand has 103 places, 127 transitions, 1389 flow. Second operand 7 states and 793 transitions. [2023-11-19 07:40:28,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 246 transitions, 2810 flow [2023-11-19 07:40:28,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 246 transitions, 2626 flow, removed 18 selfloop flow, removed 8 redundant places. [2023-11-19 07:40:28,630 INFO L231 Difference]: Finished difference. Result has 102 places, 159 transitions, 1855 flow [2023-11-19 07:40:28,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1855, PETRI_PLACES=102, PETRI_TRANSITIONS=159} [2023-11-19 07:40:28,631 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 64 predicate places. [2023-11-19 07:40:28,631 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 159 transitions, 1855 flow [2023-11-19 07:40:28,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 104.375) internal successors, (835), 8 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:28,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:28,631 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 07:40:28,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:28,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:28,832 INFO L420 AbstractCegarLoop]: === Iteration 25 === 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 07:40:28,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:28,832 INFO L85 PathProgramCache]: Analyzing trace with hash 172544451, now seen corresponding path program 2 times [2023-11-19 07:40:28,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:28,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195153947] [2023-11-19 07:40:28,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:28,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:28,901 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 07:40:28,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:28,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195153947] [2023-11-19 07:40:28,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195153947] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:28,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:28,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:40:28,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242447498] [2023-11-19 07:40:28,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:28,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:28,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:28,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:28,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:28,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 219 [2023-11-19 07:40:28,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 159 transitions, 1855 flow. Second operand has 5 states, 5 states have (on average 106.6) internal successors, (533), 5 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:28,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:28,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 219 [2023-11-19 07:40:28,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:30,430 INFO L124 PetriNetUnfolderBase]: 6728/9095 cut-off events. [2023-11-19 07:40:30,430 INFO L125 PetriNetUnfolderBase]: For 61250/61250 co-relation queries the response was YES. [2023-11-19 07:40:30,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49381 conditions, 9095 events. 6728/9095 cut-off events. For 61250/61250 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 41553 event pairs, 1126 based on Foata normal form. 54/9149 useless extension candidates. Maximal degree in co-relation 44852. Up to 4337 conditions per place. [2023-11-19 07:40:30,508 INFO L140 encePairwiseOnDemand]: 214/219 looper letters, 299 selfloop transitions, 25 changer transitions 16/340 dead transitions. [2023-11-19 07:40:30,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 340 transitions, 4540 flow [2023-11-19 07:40:30,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:40:30,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:40:30,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 576 transitions. [2023-11-19 07:40:30,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260273972602739 [2023-11-19 07:40:30,512 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 576 transitions. [2023-11-19 07:40:30,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 576 transitions. [2023-11-19 07:40:30,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:30,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 576 transitions. [2023-11-19 07:40:30,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.2) internal successors, (576), 5 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:30,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:30,516 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:30,517 INFO L175 Difference]: Start difference. First operand has 102 places, 159 transitions, 1855 flow. Second operand 5 states and 576 transitions. [2023-11-19 07:40:30,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 340 transitions, 4540 flow [2023-11-19 07:40:30,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 340 transitions, 4338 flow, removed 17 selfloop flow, removed 2 redundant places. [2023-11-19 07:40:30,790 INFO L231 Difference]: Finished difference. Result has 107 places, 161 transitions, 1905 flow [2023-11-19 07:40:30,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1749, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1905, PETRI_PLACES=107, PETRI_TRANSITIONS=161} [2023-11-19 07:40:30,791 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 69 predicate places. [2023-11-19 07:40:30,791 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 161 transitions, 1905 flow [2023-11-19 07:40:30,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 106.6) internal successors, (533), 5 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:30,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:30,792 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 07:40:30,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-19 07:40:30,792 INFO L420 AbstractCegarLoop]: === Iteration 26 === 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 07:40:30,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:30,792 INFO L85 PathProgramCache]: Analyzing trace with hash 619616319, now seen corresponding path program 3 times [2023-11-19 07:40:30,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:30,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837417703] [2023-11-19 07:40:30,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:30,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:40:30,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:30,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837417703] [2023-11-19 07:40:30,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837417703] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:30,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661922584] [2023-11-19 07:40:30,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:40:30,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:30,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:30,885 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:30,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:40:31,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:40:31,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:40:31,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:40:31,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:31,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:31,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:31,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:31,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661922584] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:31,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:40:31,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-19 07:40:31,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322231299] [2023-11-19 07:40:31,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:31,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:40:31,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:31,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:40:31,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:40:31,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 219 [2023-11-19 07:40:31,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 161 transitions, 1905 flow. Second operand has 10 states, 10 states have (on average 101.2) internal successors, (1012), 10 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:31,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:31,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 219 [2023-11-19 07:40:31,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:33,533 INFO L124 PetriNetUnfolderBase]: 9406/12687 cut-off events. [2023-11-19 07:40:33,533 INFO L125 PetriNetUnfolderBase]: For 97815/97815 co-relation queries the response was YES. [2023-11-19 07:40:33,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72162 conditions, 12687 events. 9406/12687 cut-off events. For 97815/97815 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 61026 event pairs, 640 based on Foata normal form. 290/12977 useless extension candidates. Maximal degree in co-relation 62725. Up to 6373 conditions per place. [2023-11-19 07:40:33,668 INFO L140 encePairwiseOnDemand]: 211/219 looper letters, 447 selfloop transitions, 205 changer transitions 0/652 dead transitions. [2023-11-19 07:40:33,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 652 transitions, 8262 flow [2023-11-19 07:40:33,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:40:33,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-19 07:40:33,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1821 transitions. [2023-11-19 07:40:33,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48912167606768736 [2023-11-19 07:40:33,672 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1821 transitions. [2023-11-19 07:40:33,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1821 transitions. [2023-11-19 07:40:33,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:33,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1821 transitions. [2023-11-19 07:40:33,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 107.11764705882354) internal successors, (1821), 17 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:33,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 219.0) internal successors, (3942), 18 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:33,683 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 219.0) internal successors, (3942), 18 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:33,683 INFO L175 Difference]: Start difference. First operand has 107 places, 161 transitions, 1905 flow. Second operand 17 states and 1821 transitions. [2023-11-19 07:40:33,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 652 transitions, 8262 flow [2023-11-19 07:40:34,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 652 transitions, 8051 flow, removed 60 selfloop flow, removed 2 redundant places. [2023-11-19 07:40:34,184 INFO L231 Difference]: Finished difference. Result has 133 places, 357 transitions, 4818 flow [2023-11-19 07:40:34,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1823, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4818, PETRI_PLACES=133, PETRI_TRANSITIONS=357} [2023-11-19 07:40:34,185 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 95 predicate places. [2023-11-19 07:40:34,185 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 357 transitions, 4818 flow [2023-11-19 07:40:34,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 101.2) internal successors, (1012), 10 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:34,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:34,185 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 07:40:34,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:34,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:34,389 INFO L420 AbstractCegarLoop]: === Iteration 27 === 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 07:40:34,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:34,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1555601767, now seen corresponding path program 4 times [2023-11-19 07:40:34,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:34,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402919938] [2023-11-19 07:40:34,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:34,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:34,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:40:34,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:34,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402919938] [2023-11-19 07:40:34,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402919938] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:34,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988953959] [2023-11-19 07:40:34,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:40:34,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:34,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:34,467 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:34,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5019bd70-021c-48a3-aaf3-2d25fb87e6d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:40:34,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:40:34,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:40:34,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:40:34,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:34,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:40:34,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:40:34,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988953959] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:34,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:40:34,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-19 07:40:34,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988205594] [2023-11-19 07:40:34,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:34,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:40:34,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:34,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:40:34,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:40:34,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 219 [2023-11-19 07:40:34,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 357 transitions, 4818 flow. Second operand has 10 states, 10 states have (on average 104.1) internal successors, (1041), 10 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:34,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:34,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 219 [2023-11-19 07:40:34,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand