./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.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_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/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_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/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_7e7a5eb3-9704-408e-8074-f48ece8af6bb/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 b034d85232772d264d33ccb960d3ce3e7bf57df858fd0c6fd0b22127388c3f9a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:58:25,883 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:58:25,984 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:58:25,988 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:58:25,989 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:58:26,018 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:58:26,019 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:58:26,019 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:58:26,020 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:58:26,020 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:58:26,021 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:58:26,022 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:58:26,022 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:58:26,023 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:58:26,023 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:58:26,024 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:58:26,030 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:58:26,033 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:58:26,034 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:58:26,034 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:58:26,036 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:58:26,037 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:58:26,037 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:58:26,037 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:58:26,038 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:58:26,039 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:58:26,039 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:58:26,040 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:58:26,040 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:58:26,041 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:58:26,042 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:58:26,042 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:58:26,042 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:58:26,043 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:58:26,043 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:58:26,043 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:58:26,043 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:58:26,044 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:58:26,044 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:58:26,044 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_7e7a5eb3-9704-408e-8074-f48ece8af6bb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b034d85232772d264d33ccb960d3ce3e7bf57df858fd0c6fd0b22127388c3f9a [2023-11-19 07:58:26,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:58:26,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:58:26,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:58:26,402 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:58:26,404 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:58:26,405 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c [2023-11-19 07:58:29,625 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:58:30,055 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:58:30,056 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c [2023-11-19 07:58:30,072 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/data/bb5096e69/b4d4ea9ae31841fba0b906ca2151ae14/FLAGc1d9f6e66 [2023-11-19 07:58:30,101 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/data/bb5096e69/b4d4ea9ae31841fba0b906ca2151ae14 [2023-11-19 07:58:30,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:58:30,107 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:58:30,108 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:58:30,109 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:58:30,115 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:58:30,116 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:58:30" (1/1) ... [2023-11-19 07:58:30,118 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bdc396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:30, skipping insertion in model container [2023-11-19 07:58:30,118 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:58:30" (1/1) ... [2023-11-19 07:58:30,154 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:58:30,417 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_7e7a5eb3-9704-408e-8074-f48ece8af6bb/sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c[2592,2605] [2023-11-19 07:58:30,433 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:58:30,460 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:58:30,488 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_7e7a5eb3-9704-408e-8074-f48ece8af6bb/sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c[2592,2605] [2023-11-19 07:58:30,493 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:58:30,514 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:58:30,514 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:30 WrapperNode [2023-11-19 07:58:30,515 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:58:30,516 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:58:30,517 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:58:30,517 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:58:30,526 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:30" (1/1) ... [2023-11-19 07:58:30,538 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:30" (1/1) ... [2023-11-19 07:58:30,578 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 181 [2023-11-19 07:58:30,578 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:58:30,579 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:58:30,580 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:58:30,580 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:58:30,591 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:30" (1/1) ... [2023-11-19 07:58:30,592 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:30" (1/1) ... [2023-11-19 07:58:30,596 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:30" (1/1) ... [2023-11-19 07:58:30,596 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:30" (1/1) ... [2023-11-19 07:58:30,610 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:30" (1/1) ... [2023-11-19 07:58:30,620 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:30" (1/1) ... [2023-11-19 07:58:30,624 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:30" (1/1) ... [2023-11-19 07:58:30,630 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:30" (1/1) ... [2023-11-19 07:58:30,634 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:58:30,635 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:58:30,635 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:58:30,635 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:58:30,636 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:30" (1/1) ... [2023-11-19 07:58:30,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:58:30,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:30,674 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:58:30,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:58:30,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:58:30,728 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:58:30,729 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:58:30,729 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:58:30,729 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:58:30,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:58:30,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:58:30,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:58:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:58:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:58:30,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:58:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:58:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:58:30,732 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 07:58:30,894 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:58:30,896 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:58:31,383 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:58:31,400 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:58:31,401 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 07:58:31,408 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:58:31 BoogieIcfgContainer [2023-11-19 07:58:31,408 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:58:31,411 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:58:31,412 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:58:31,416 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:58:31,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:58:30" (1/3) ... [2023-11-19 07:58:31,418 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@448d71b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:58:31, skipping insertion in model container [2023-11-19 07:58:31,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:30" (2/3) ... [2023-11-19 07:58:31,419 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@448d71b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:58:31, skipping insertion in model container [2023-11-19 07:58:31,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:58:31" (3/3) ... [2023-11-19 07:58:31,421 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-opt-symm.wvr.c [2023-11-19 07:58:31,434 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:58:31,450 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:58:31,450 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:58:31,451 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:58:31,566 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:58:31,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 216 transitions, 446 flow [2023-11-19 07:58:31,876 INFO L124 PetriNetUnfolderBase]: 19/214 cut-off events. [2023-11-19 07:58:31,876 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:58:31,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 214 events. 19/214 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 221 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 153. Up to 3 conditions per place. [2023-11-19 07:58:31,887 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 216 transitions, 446 flow [2023-11-19 07:58:31,897 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 205 transitions, 422 flow [2023-11-19 07:58:31,902 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:58:31,928 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 205 transitions, 422 flow [2023-11-19 07:58:31,939 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 205 transitions, 422 flow [2023-11-19 07:58:31,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 205 transitions, 422 flow [2023-11-19 07:58:32,067 INFO L124 PetriNetUnfolderBase]: 19/205 cut-off events. [2023-11-19 07:58:32,069 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:58:32,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 205 events. 19/205 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 221 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 153. Up to 3 conditions per place. [2023-11-19 07:58:32,080 INFO L119 LiptonReduction]: Number of co-enabled transitions 3672 [2023-11-19 07:58:40,456 INFO L134 LiptonReduction]: Checked pairs total: 4336 [2023-11-19 07:58:40,456 INFO L136 LiptonReduction]: Total number of compositions: 230 [2023-11-19 07:58:40,477 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:58:40,486 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;@92e42af, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:58:40,486 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:58:40,495 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:58:40,495 INFO L124 PetriNetUnfolderBase]: 6/24 cut-off events. [2023-11-19 07:58:40,495 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:58:40,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:40,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:40,497 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:40,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:40,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1972019225, now seen corresponding path program 1 times [2023-11-19 07:58:40,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:40,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879294552] [2023-11-19 07:58:40,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:40,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:40,984 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 07:58:40,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:40,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879294552] [2023-11-19 07:58:40,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879294552] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:40,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:40,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:58:40,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386566644] [2023-11-19 07:58:40,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:41,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:58:41,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:41,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:58:41,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:58:41,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 446 [2023-11-19 07:58:41,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:41,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:41,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 446 [2023-11-19 07:58:41,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:41,264 INFO L124 PetriNetUnfolderBase]: 91/155 cut-off events. [2023-11-19 07:58:41,265 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-19 07:58:41,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 155 events. 91/155 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 376 event pairs, 51 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 275. Up to 151 conditions per place. [2023-11-19 07:58:41,272 INFO L140 encePairwiseOnDemand]: 441/446 looper letters, 22 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2023-11-19 07:58:41,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 27 transitions, 118 flow [2023-11-19 07:58:41,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:58:41,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:58:41,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 592 transitions. [2023-11-19 07:58:41,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44245142002989535 [2023-11-19 07:58:41,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 592 transitions. [2023-11-19 07:58:41,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 592 transitions. [2023-11-19 07:58:41,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:41,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 592 transitions. [2023-11-19 07:58:41,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:41,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:41,335 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:41,337 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 62 flow. Second operand 3 states and 592 transitions. [2023-11-19 07:58:41,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 27 transitions, 118 flow [2023-11-19 07:58:41,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 27 transitions, 110 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:58:41,344 INFO L231 Difference]: Finished difference. Result has 25 places, 27 transitions, 76 flow [2023-11-19 07:58:41,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=25, PETRI_TRANSITIONS=27} [2023-11-19 07:58:41,350 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2023-11-19 07:58:41,351 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 27 transitions, 76 flow [2023-11-19 07:58:41,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:41,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:41,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:41,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:58:41,353 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:41,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:41,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1250895684, now seen corresponding path program 1 times [2023-11-19 07:58:41,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:41,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788954244] [2023-11-19 07:58:41,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:41,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:58:41,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:41,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788954244] [2023-11-19 07:58:41,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788954244] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:41,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:41,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:58:41,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215916725] [2023-11-19 07:58:41,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:41,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:58:41,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:41,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:58:41,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:58:41,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 446 [2023-11-19 07:58:41,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 27 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 198.25) internal successors, (793), 4 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 07:58:41,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:41,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 446 [2023-11-19 07:58:41,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:41,877 INFO L124 PetriNetUnfolderBase]: 173/314 cut-off events. [2023-11-19 07:58:41,877 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:58:41,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 638 conditions, 314 events. 173/314 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1138 event pairs, 51 based on Foata normal form. 4/239 useless extension candidates. Maximal degree in co-relation 617. Up to 147 conditions per place. [2023-11-19 07:58:41,883 INFO L140 encePairwiseOnDemand]: 440/446 looper letters, 45 selfloop transitions, 5 changer transitions 2/53 dead transitions. [2023-11-19 07:58:41,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 53 transitions, 238 flow [2023-11-19 07:58:41,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:58:41,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:58:41,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1021 transitions. [2023-11-19 07:58:41,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.457847533632287 [2023-11-19 07:58:41,899 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1021 transitions. [2023-11-19 07:58:41,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1021 transitions. [2023-11-19 07:58:41,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:41,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1021 transitions. [2023-11-19 07:58:41,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 204.2) internal successors, (1021), 5 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:41,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 446.0) internal successors, (2676), 6 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:41,918 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 446.0) internal successors, (2676), 6 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:41,919 INFO L175 Difference]: Start difference. First operand has 25 places, 27 transitions, 76 flow. Second operand 5 states and 1021 transitions. [2023-11-19 07:58:41,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 53 transitions, 238 flow [2023-11-19 07:58:41,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 53 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:58:41,925 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 96 flow [2023-11-19 07:58:41,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2023-11-19 07:58:41,926 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 4 predicate places. [2023-11-19 07:58:41,928 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 96 flow [2023-11-19 07:58:41,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 198.25) internal successors, (793), 4 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 07:58:41,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:41,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:41,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:58:41,939 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:41,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:41,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1636231820, now seen corresponding path program 2 times [2023-11-19 07:58:41,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:41,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747040688] [2023-11-19 07:58:41,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:41,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:42,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:58:42,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:42,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747040688] [2023-11-19 07:58:42,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747040688] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:42,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:42,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:58:42,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666115238] [2023-11-19 07:58:42,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:42,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:58:42,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:42,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:58:42,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:58:42,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 446 [2023-11-19 07:58:42,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 198.25) internal successors, (793), 4 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 07:58:42,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:42,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 446 [2023-11-19 07:58:42,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:42,365 INFO L124 PetriNetUnfolderBase]: 211/378 cut-off events. [2023-11-19 07:58:42,366 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2023-11-19 07:58:42,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 858 conditions, 378 events. 211/378 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1380 event pairs, 50 based on Foata normal form. 4/319 useless extension candidates. Maximal degree in co-relation 829. Up to 271 conditions per place. [2023-11-19 07:58:42,370 INFO L140 encePairwiseOnDemand]: 441/446 looper letters, 43 selfloop transitions, 4 changer transitions 3/51 dead transitions. [2023-11-19 07:58:42,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 51 transitions, 256 flow [2023-11-19 07:58:42,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:58:42,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:58:42,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 823 transitions. [2023-11-19 07:58:42,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461322869955157 [2023-11-19 07:58:42,375 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 823 transitions. [2023-11-19 07:58:42,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 823 transitions. [2023-11-19 07:58:42,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:42,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 823 transitions. [2023-11-19 07:58:42,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 205.75) internal successors, (823), 4 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:42,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 446.0) internal successors, (2230), 5 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:42,389 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 446.0) internal successors, (2230), 5 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:42,389 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 96 flow. Second operand 4 states and 823 transitions. [2023-11-19 07:58:42,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 51 transitions, 256 flow [2023-11-19 07:58:42,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 51 transitions, 248 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:58:42,393 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 130 flow [2023-11-19 07:58:42,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=130, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2023-11-19 07:58:42,394 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 8 predicate places. [2023-11-19 07:58:42,395 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 130 flow [2023-11-19 07:58:42,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 198.25) internal successors, (793), 4 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 07:58:42,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:42,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:42,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:58:42,397 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:42,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:42,398 INFO L85 PathProgramCache]: Analyzing trace with hash -283373742, now seen corresponding path program 3 times [2023-11-19 07:58:42,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:42,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941945264] [2023-11-19 07:58:42,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:42,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:42,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:58:42,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:42,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941945264] [2023-11-19 07:58:42,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941945264] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:42,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:42,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:58:42,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923778012] [2023-11-19 07:58:42,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:42,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:58:42,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:42,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:58:42,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:58:42,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 446 [2023-11-19 07:58:42,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 198.25) internal successors, (793), 4 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 07:58:42,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:42,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 446 [2023-11-19 07:58:42,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:42,787 INFO L124 PetriNetUnfolderBase]: 201/358 cut-off events. [2023-11-19 07:58:42,787 INFO L125 PetriNetUnfolderBase]: For 168/168 co-relation queries the response was YES. [2023-11-19 07:58:42,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 358 events. 201/358 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1292 event pairs, 53 based on Foata normal form. 4/302 useless extension candidates. Maximal degree in co-relation 855. Up to 160 conditions per place. [2023-11-19 07:58:42,791 INFO L140 encePairwiseOnDemand]: 441/446 looper letters, 46 selfloop transitions, 7 changer transitions 3/57 dead transitions. [2023-11-19 07:58:42,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 57 transitions, 309 flow [2023-11-19 07:58:42,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:58:42,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:58:42,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 827 transitions. [2023-11-19 07:58:42,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46356502242152464 [2023-11-19 07:58:42,799 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 827 transitions. [2023-11-19 07:58:42,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 827 transitions. [2023-11-19 07:58:42,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:42,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 827 transitions. [2023-11-19 07:58:42,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 206.75) internal successors, (827), 4 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 07:58:42,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 446.0) internal successors, (2230), 5 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:42,813 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 446.0) internal successors, (2230), 5 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:42,813 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 130 flow. Second operand 4 states and 827 transitions. [2023-11-19 07:58:42,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 57 transitions, 309 flow [2023-11-19 07:58:42,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 57 transitions, 305 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-19 07:58:42,823 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 155 flow [2023-11-19 07:58:42,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=155, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2023-11-19 07:58:42,826 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 12 predicate places. [2023-11-19 07:58:42,826 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 155 flow [2023-11-19 07:58:42,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 198.25) internal successors, (793), 4 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 07:58:42,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:42,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:42,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:58:42,828 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:42,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:42,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1711088498, now seen corresponding path program 1 times [2023-11-19 07:58:42,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:42,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520495129] [2023-11-19 07:58:42,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:42,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:58:43,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:43,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520495129] [2023-11-19 07:58:43,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520495129] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:43,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125943549] [2023-11-19 07:58:43,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:43,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:43,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:43,055 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:43,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:58:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:43,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:58:43,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:43,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:58:43,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:58:43,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125943549] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:43,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:43,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-19 07:58:43,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629493913] [2023-11-19 07:58:43,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:43,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:58:43,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:43,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:58:43,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:58:43,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 446 [2023-11-19 07:58:43,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 155 flow. Second operand has 8 states, 8 states have (on average 187.125) internal successors, (1497), 8 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:43,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:43,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 446 [2023-11-19 07:58:43,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:43,570 INFO L124 PetriNetUnfolderBase]: 198/354 cut-off events. [2023-11-19 07:58:43,571 INFO L125 PetriNetUnfolderBase]: For 240/240 co-relation queries the response was YES. [2023-11-19 07:58:43,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 904 conditions, 354 events. 198/354 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1203 event pairs, 114 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 855. Up to 332 conditions per place. [2023-11-19 07:58:43,574 INFO L140 encePairwiseOnDemand]: 441/446 looper letters, 29 selfloop transitions, 10 changer transitions 0/40 dead transitions. [2023-11-19 07:58:43,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 257 flow [2023-11-19 07:58:43,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:58:43,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:58:43,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1142 transitions. [2023-11-19 07:58:43,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42675635276532137 [2023-11-19 07:58:43,580 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1142 transitions. [2023-11-19 07:58:43,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1142 transitions. [2023-11-19 07:58:43,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:43,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1142 transitions. [2023-11-19 07:58:43,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 190.33333333333334) internal successors, (1142), 6 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:43,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 446.0) internal successors, (3122), 7 states have internal predecessors, (3122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:43,596 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 446.0) internal successors, (3122), 7 states have internal predecessors, (3122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:43,596 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 155 flow. Second operand 6 states and 1142 transitions. [2023-11-19 07:58:43,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 257 flow [2023-11-19 07:58:43,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 40 transitions, 245 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-19 07:58:43,603 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 209 flow [2023-11-19 07:58:43,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=209, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2023-11-19 07:58:43,606 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2023-11-19 07:58:43,607 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 209 flow [2023-11-19 07:58:43,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 187.125) internal successors, (1497), 8 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:43,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:43,608 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:43,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:43,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:43,825 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:43,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:43,826 INFO L85 PathProgramCache]: Analyzing trace with hash 722586617, now seen corresponding path program 2 times [2023-11-19 07:58:43,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:43,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086059727] [2023-11-19 07:58:43,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:43,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:43,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:58:44,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:44,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086059727] [2023-11-19 07:58:44,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086059727] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:44,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351847253] [2023-11-19 07:58:44,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:58:44,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:44,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:44,111 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:44,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:58:44,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 07:58:44,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:44,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:58:44,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 07:58:44,507 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:58:44,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351847253] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:44,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:58:44,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2023-11-19 07:58:44,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299030676] [2023-11-19 07:58:44,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:44,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:58:44,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:44,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:58:44,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:58:44,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 446 [2023-11-19 07:58:44,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 209 flow. Second operand has 8 states, 8 states have (on average 178.375) internal successors, (1427), 8 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:44,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:44,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 446 [2023-11-19 07:58:44,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:45,537 INFO L124 PetriNetUnfolderBase]: 259/477 cut-off events. [2023-11-19 07:58:45,537 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2023-11-19 07:58:45,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1162 conditions, 477 events. 259/477 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1880 event pairs, 62 based on Foata normal form. 13/408 useless extension candidates. Maximal degree in co-relation 1096. Up to 163 conditions per place. [2023-11-19 07:58:45,543 INFO L140 encePairwiseOnDemand]: 435/446 looper letters, 65 selfloop transitions, 13 changer transitions 10/89 dead transitions. [2023-11-19 07:58:45,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 89 transitions, 506 flow [2023-11-19 07:58:45,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:58:45,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:58:45,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1485 transitions. [2023-11-19 07:58:45,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4161995515695067 [2023-11-19 07:58:45,552 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1485 transitions. [2023-11-19 07:58:45,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1485 transitions. [2023-11-19 07:58:45,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:45,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1485 transitions. [2023-11-19 07:58:45,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 185.625) internal successors, (1485), 8 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:45,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 446.0) internal successors, (4014), 9 states have internal predecessors, (4014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:45,571 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 446.0) internal successors, (4014), 9 states have internal predecessors, (4014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:45,571 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 209 flow. Second operand 8 states and 1485 transitions. [2023-11-19 07:58:45,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 89 transitions, 506 flow [2023-11-19 07:58:45,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 89 transitions, 490 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-19 07:58:45,578 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 281 flow [2023-11-19 07:58:45,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=281, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-11-19 07:58:45,581 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 28 predicate places. [2023-11-19 07:58:45,582 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 281 flow [2023-11-19 07:58:45,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.375) internal successors, (1427), 8 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:45,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:45,583 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:45,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:45,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:58:45,809 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:45,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:45,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1901460781, now seen corresponding path program 3 times [2023-11-19 07:58:45,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:45,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549611786] [2023-11-19 07:58:45,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:45,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:45,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:46,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:58:46,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:46,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549611786] [2023-11-19 07:58:46,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549611786] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:46,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028512126] [2023-11-19 07:58:46,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:58:46,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:46,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:46,071 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:46,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:58:46,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-19 07:58:46,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:46,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:58:46,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:46,520 INFO L349 Elim1Store]: treesize reduction 3, result has 91.9 percent of original size [2023-11-19 07:58:46,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 66 [2023-11-19 07:58:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 07:58:46,726 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:58:46,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028512126] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:46,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:58:46,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 13 [2023-11-19 07:58:46,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765706702] [2023-11-19 07:58:46,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:46,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:58:46,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:46,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:58:46,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:58:47,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 446 [2023-11-19 07:58:47,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 281 flow. Second operand has 8 states, 8 states have (on average 178.375) internal successors, (1427), 8 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:47,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:47,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 446 [2023-11-19 07:58:47,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:47,893 INFO L124 PetriNetUnfolderBase]: 269/497 cut-off events. [2023-11-19 07:58:47,894 INFO L125 PetriNetUnfolderBase]: For 466/468 co-relation queries the response was YES. [2023-11-19 07:58:47,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1565 conditions, 497 events. 269/497 cut-off events. For 466/468 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1981 event pairs, 62 based on Foata normal form. 3/441 useless extension candidates. Maximal degree in co-relation 1531. Up to 234 conditions per place. [2023-11-19 07:58:47,900 INFO L140 encePairwiseOnDemand]: 435/446 looper letters, 59 selfloop transitions, 16 changer transitions 7/83 dead transitions. [2023-11-19 07:58:47,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 83 transitions, 569 flow [2023-11-19 07:58:47,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:58:47,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:58:47,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1474 transitions. [2023-11-19 07:58:47,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131165919282511 [2023-11-19 07:58:47,908 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1474 transitions. [2023-11-19 07:58:47,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1474 transitions. [2023-11-19 07:58:47,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:47,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1474 transitions. [2023-11-19 07:58:47,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 184.25) internal successors, (1474), 8 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:47,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 446.0) internal successors, (4014), 9 states have internal predecessors, (4014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:47,926 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 446.0) internal successors, (4014), 9 states have internal predecessors, (4014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:47,926 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 281 flow. Second operand 8 states and 1474 transitions. [2023-11-19 07:58:47,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 83 transitions, 569 flow [2023-11-19 07:58:47,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 83 transitions, 549 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-11-19 07:58:47,935 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 358 flow [2023-11-19 07:58:47,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=358, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2023-11-19 07:58:47,936 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 35 predicate places. [2023-11-19 07:58:47,937 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 358 flow [2023-11-19 07:58:47,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.375) internal successors, (1427), 8 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:47,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:47,938 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:47,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:48,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:58:48,161 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:48,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:48,162 INFO L85 PathProgramCache]: Analyzing trace with hash -977655337, now seen corresponding path program 4 times [2023-11-19 07:58:48,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:48,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502732458] [2023-11-19 07:58:48,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:48,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:48,340 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:58:48,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:48,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502732458] [2023-11-19 07:58:48,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502732458] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:48,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086509694] [2023-11-19 07:58:48,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:58:48,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:48,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:48,343 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:48,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:58:48,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:58:48,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:48,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:58:48,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 07:58:48,672 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:58:48,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086509694] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:48,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:58:48,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 13 [2023-11-19 07:58:48,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802486418] [2023-11-19 07:58:48,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:48,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:58:48,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:48,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:58:48,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:58:49,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 446 [2023-11-19 07:58:49,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 358 flow. Second operand has 8 states, 8 states have (on average 178.375) internal successors, (1427), 8 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:49,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:49,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 446 [2023-11-19 07:58:49,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:49,569 INFO L124 PetriNetUnfolderBase]: 272/512 cut-off events. [2023-11-19 07:58:49,570 INFO L125 PetriNetUnfolderBase]: For 739/741 co-relation queries the response was YES. [2023-11-19 07:58:49,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1755 conditions, 512 events. 272/512 cut-off events. For 739/741 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2110 event pairs, 66 based on Foata normal form. 3/460 useless extension candidates. Maximal degree in co-relation 1715. Up to 163 conditions per place. [2023-11-19 07:58:49,577 INFO L140 encePairwiseOnDemand]: 435/446 looper letters, 71 selfloop transitions, 17 changer transitions 5/94 dead transitions. [2023-11-19 07:58:49,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 94 transitions, 681 flow [2023-11-19 07:58:49,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:58:49,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:58:49,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1484 transitions. [2023-11-19 07:58:49,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41591928251121074 [2023-11-19 07:58:49,586 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1484 transitions. [2023-11-19 07:58:49,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1484 transitions. [2023-11-19 07:58:49,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:49,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1484 transitions. [2023-11-19 07:58:49,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 185.5) internal successors, (1484), 8 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:49,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 446.0) internal successors, (4014), 9 states have internal predecessors, (4014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:49,607 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 446.0) internal successors, (4014), 9 states have internal predecessors, (4014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:49,608 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 358 flow. Second operand 8 states and 1484 transitions. [2023-11-19 07:58:49,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 94 transitions, 681 flow [2023-11-19 07:58:49,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 94 transitions, 637 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-11-19 07:58:49,619 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 390 flow [2023-11-19 07:58:49,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=390, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2023-11-19 07:58:49,623 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 39 predicate places. [2023-11-19 07:58:49,623 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 390 flow [2023-11-19 07:58:49,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.375) internal successors, (1427), 8 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:49,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:49,625 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:49,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:49,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:49,840 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:49,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:49,841 INFO L85 PathProgramCache]: Analyzing trace with hash 241392383, now seen corresponding path program 5 times [2023-11-19 07:58:49,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:49,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091375797] [2023-11-19 07:58:49,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:49,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:58:50,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:50,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091375797] [2023-11-19 07:58:50,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091375797] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:50,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504684420] [2023-11-19 07:58:50,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:58:50,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:50,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:50,157 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:50,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:58:50,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-19 07:58:50,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:50,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:58:50,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:58:50,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:50,554 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:58:50,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504684420] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:50,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:50,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-11-19 07:58:50,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098853490] [2023-11-19 07:58:50,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:50,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:58:50,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:50,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:58:50,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:58:50,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 446 [2023-11-19 07:58:50,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 390 flow. Second operand has 17 states, 17 states have (on average 186.11764705882354) internal successors, (3164), 17 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:50,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:50,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 446 [2023-11-19 07:58:50,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:51,115 INFO L124 PetriNetUnfolderBase]: 269/506 cut-off events. [2023-11-19 07:58:51,115 INFO L125 PetriNetUnfolderBase]: For 1239/1241 co-relation queries the response was YES. [2023-11-19 07:58:51,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1931 conditions, 506 events. 269/506 cut-off events. For 1239/1241 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2033 event pairs, 143 based on Foata normal form. 1/506 useless extension candidates. Maximal degree in co-relation 1889. Up to 477 conditions per place. [2023-11-19 07:58:51,122 INFO L140 encePairwiseOnDemand]: 441/446 looper letters, 45 selfloop transitions, 12 changer transitions 0/58 dead transitions. [2023-11-19 07:58:51,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 58 transitions, 516 flow [2023-11-19 07:58:51,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:58:51,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:58:51,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1324 transitions. [2023-11-19 07:58:51,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42408712363869316 [2023-11-19 07:58:51,129 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1324 transitions. [2023-11-19 07:58:51,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1324 transitions. [2023-11-19 07:58:51,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:51,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1324 transitions. [2023-11-19 07:58:51,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 189.14285714285714) internal successors, (1324), 7 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:51,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 446.0) internal successors, (3568), 8 states have internal predecessors, (3568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:51,144 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 446.0) internal successors, (3568), 8 states have internal predecessors, (3568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:51,144 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 390 flow. Second operand 7 states and 1324 transitions. [2023-11-19 07:58:51,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 58 transitions, 516 flow [2023-11-19 07:58:51,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 58 transitions, 484 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-19 07:58:51,153 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 404 flow [2023-11-19 07:58:51,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=404, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2023-11-19 07:58:51,154 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 41 predicate places. [2023-11-19 07:58:51,155 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 404 flow [2023-11-19 07:58:51,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 186.11764705882354) internal successors, (3164), 17 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:51,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:51,157 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:51,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:51,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:51,377 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:51,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:51,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1878316878, now seen corresponding path program 6 times [2023-11-19 07:58:51,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:51,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012567631] [2023-11-19 07:58:51,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:51,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:51,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-19 07:58:52,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:52,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012567631] [2023-11-19 07:58:52,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012567631] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:52,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:52,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-19 07:58:52,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712301058] [2023-11-19 07:58:52,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:52,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:58:52,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:52,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:58:52,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:58:52,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 446 [2023-11-19 07:58:52,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 404 flow. Second operand has 11 states, 11 states have (on average 171.72727272727272) internal successors, (1889), 11 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:52,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:52,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 446 [2023-11-19 07:58:52,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:53,569 INFO L124 PetriNetUnfolderBase]: 279/519 cut-off events. [2023-11-19 07:58:53,570 INFO L125 PetriNetUnfolderBase]: For 1126/1128 co-relation queries the response was YES. [2023-11-19 07:58:53,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1956 conditions, 519 events. 279/519 cut-off events. For 1126/1128 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2085 event pairs, 37 based on Foata normal form. 3/522 useless extension candidates. Maximal degree in co-relation 1867. Up to 131 conditions per place. [2023-11-19 07:58:53,576 INFO L140 encePairwiseOnDemand]: 434/446 looper letters, 86 selfloop transitions, 32 changer transitions 15/134 dead transitions. [2023-11-19 07:58:53,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 134 transitions, 1027 flow [2023-11-19 07:58:53,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:58:53,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-19 07:58:53,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2661 transitions. [2023-11-19 07:58:53,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977578475336323 [2023-11-19 07:58:53,588 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2661 transitions. [2023-11-19 07:58:53,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2661 transitions. [2023-11-19 07:58:53,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:53,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2661 transitions. [2023-11-19 07:58:53,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 177.4) internal successors, (2661), 15 states have internal predecessors, (2661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:53,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 446.0) internal successors, (7136), 16 states have internal predecessors, (7136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:53,613 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 446.0) internal successors, (7136), 16 states have internal predecessors, (7136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:53,613 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 404 flow. Second operand 15 states and 2661 transitions. [2023-11-19 07:58:53,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 134 transitions, 1027 flow [2023-11-19 07:58:53,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 134 transitions, 1003 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-19 07:58:53,625 INFO L231 Difference]: Finished difference. Result has 81 places, 72 transitions, 588 flow [2023-11-19 07:58:53,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=588, PETRI_PLACES=81, PETRI_TRANSITIONS=72} [2023-11-19 07:58:53,626 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 55 predicate places. [2023-11-19 07:58:53,626 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 72 transitions, 588 flow [2023-11-19 07:58:53,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 171.72727272727272) internal successors, (1889), 11 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:53,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:53,628 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:53,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:58:53,628 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:53,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:53,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1558885398, now seen corresponding path program 7 times [2023-11-19 07:58:53,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:53,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58299618] [2023-11-19 07:58:53,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:53,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:53,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:54,752 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-19 07:58:54,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:54,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58299618] [2023-11-19 07:58:54,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58299618] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:54,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:54,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-19 07:58:54,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917639406] [2023-11-19 07:58:54,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:54,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:58:54,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:54,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:58:54,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:58:55,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 446 [2023-11-19 07:58:55,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 72 transitions, 588 flow. Second operand has 11 states, 11 states have (on average 172.72727272727272) internal successors, (1900), 11 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:55,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:55,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 446 [2023-11-19 07:58:55,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:56,207 INFO L124 PetriNetUnfolderBase]: 280/526 cut-off events. [2023-11-19 07:58:56,208 INFO L125 PetriNetUnfolderBase]: For 1560/1562 co-relation queries the response was YES. [2023-11-19 07:58:56,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2224 conditions, 526 events. 280/526 cut-off events. For 1560/1562 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2151 event pairs, 31 based on Foata normal form. 9/535 useless extension candidates. Maximal degree in co-relation 2177. Up to 144 conditions per place. [2023-11-19 07:58:56,216 INFO L140 encePairwiseOnDemand]: 433/446 looper letters, 89 selfloop transitions, 34 changer transitions 6/130 dead transitions. [2023-11-19 07:58:56,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 130 transitions, 1087 flow [2023-11-19 07:58:56,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:58:56,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-19 07:58:56,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2673 transitions. [2023-11-19 07:58:56,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39955156950672643 [2023-11-19 07:58:56,231 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2673 transitions. [2023-11-19 07:58:56,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2673 transitions. [2023-11-19 07:58:56,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:56,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2673 transitions. [2023-11-19 07:58:56,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 178.2) internal successors, (2673), 15 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:56,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 446.0) internal successors, (7136), 16 states have internal predecessors, (7136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:56,262 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 446.0) internal successors, (7136), 16 states have internal predecessors, (7136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:56,263 INFO L175 Difference]: Start difference. First operand has 81 places, 72 transitions, 588 flow. Second operand 15 states and 2673 transitions. [2023-11-19 07:58:56,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 130 transitions, 1087 flow [2023-11-19 07:58:56,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 130 transitions, 1028 flow, removed 23 selfloop flow, removed 6 redundant places. [2023-11-19 07:58:56,283 INFO L231 Difference]: Finished difference. Result has 87 places, 74 transitions, 652 flow [2023-11-19 07:58:56,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=652, PETRI_PLACES=87, PETRI_TRANSITIONS=74} [2023-11-19 07:58:56,284 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 61 predicate places. [2023-11-19 07:58:56,285 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 74 transitions, 652 flow [2023-11-19 07:58:56,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 172.72727272727272) internal successors, (1900), 11 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:56,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:56,286 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:56,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:58:56,286 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:56,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:56,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1313263738, now seen corresponding path program 8 times [2023-11-19 07:58:56,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:56,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587599868] [2023-11-19 07:58:56,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:56,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-19 07:58:57,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:57,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587599868] [2023-11-19 07:58:57,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587599868] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:57,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:57,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-19 07:58:57,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201260742] [2023-11-19 07:58:57,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:57,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:58:57,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:57,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:58:57,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:58:58,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 446 [2023-11-19 07:58:58,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 74 transitions, 652 flow. Second operand has 11 states, 11 states have (on average 172.72727272727272) internal successors, (1900), 11 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:58,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:58,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 446 [2023-11-19 07:58:58,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:58,778 INFO L124 PetriNetUnfolderBase]: 276/512 cut-off events. [2023-11-19 07:58:58,778 INFO L125 PetriNetUnfolderBase]: For 1687/1689 co-relation queries the response was YES. [2023-11-19 07:58:58,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2274 conditions, 512 events. 276/512 cut-off events. For 1687/1689 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2033 event pairs, 35 based on Foata normal form. 3/515 useless extension candidates. Maximal degree in co-relation 2229. Up to 144 conditions per place. [2023-11-19 07:58:58,787 INFO L140 encePairwiseOnDemand]: 433/446 looper letters, 82 selfloop transitions, 31 changer transitions 9/123 dead transitions. [2023-11-19 07:58:58,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 123 transitions, 1087 flow [2023-11-19 07:58:58,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:58:58,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 07:58:58,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2493 transitions. [2023-11-19 07:58:58,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3992632927610506 [2023-11-19 07:58:58,800 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2493 transitions. [2023-11-19 07:58:58,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2493 transitions. [2023-11-19 07:58:58,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:58,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2493 transitions. [2023-11-19 07:58:58,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 178.07142857142858) internal successors, (2493), 14 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:58,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 446.0) internal successors, (6690), 15 states have internal predecessors, (6690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:58,829 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 446.0) internal successors, (6690), 15 states have internal predecessors, (6690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:58,829 INFO L175 Difference]: Start difference. First operand has 87 places, 74 transitions, 652 flow. Second operand 14 states and 2493 transitions. [2023-11-19 07:58:58,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 123 transitions, 1087 flow [2023-11-19 07:58:58,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 123 transitions, 1001 flow, removed 11 selfloop flow, removed 12 redundant places. [2023-11-19 07:58:58,847 INFO L231 Difference]: Finished difference. Result has 88 places, 71 transitions, 611 flow [2023-11-19 07:58:58,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=611, PETRI_PLACES=88, PETRI_TRANSITIONS=71} [2023-11-19 07:58:58,849 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 62 predicate places. [2023-11-19 07:58:58,849 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 71 transitions, 611 flow [2023-11-19 07:58:58,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 172.72727272727272) internal successors, (1900), 11 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:58,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:58,851 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:58,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:58:58,851 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:58,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:58,853 INFO L85 PathProgramCache]: Analyzing trace with hash -222677476, now seen corresponding path program 9 times [2023-11-19 07:58:58,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:58,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086917756] [2023-11-19 07:58:58,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:58,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:58,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-19 07:58:59,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:59,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086917756] [2023-11-19 07:58:59,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086917756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:59,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:59,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-19 07:58:59,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301989013] [2023-11-19 07:58:59,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:59,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:58:59,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:59,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:58:59,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:59:00,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 446 [2023-11-19 07:59:00,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 71 transitions, 611 flow. Second operand has 11 states, 11 states have (on average 172.72727272727272) internal successors, (1900), 11 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:00,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:00,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 446 [2023-11-19 07:59:00,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:01,188 INFO L124 PetriNetUnfolderBase]: 332/614 cut-off events. [2023-11-19 07:59:01,189 INFO L125 PetriNetUnfolderBase]: For 1793/1795 co-relation queries the response was YES. [2023-11-19 07:59:01,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2639 conditions, 614 events. 332/614 cut-off events. For 1793/1795 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2634 event pairs, 42 based on Foata normal form. 7/621 useless extension candidates. Maximal degree in co-relation 2589. Up to 165 conditions per place. [2023-11-19 07:59:01,197 INFO L140 encePairwiseOnDemand]: 434/446 looper letters, 106 selfloop transitions, 38 changer transitions 6/151 dead transitions. [2023-11-19 07:59:01,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 151 transitions, 1334 flow [2023-11-19 07:59:01,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:59:01,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-19 07:59:01,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2683 transitions. [2023-11-19 07:59:01,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40104633781763827 [2023-11-19 07:59:01,207 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2683 transitions. [2023-11-19 07:59:01,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2683 transitions. [2023-11-19 07:59:01,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:01,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2683 transitions. [2023-11-19 07:59:01,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 178.86666666666667) internal successors, (2683), 15 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:01,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 446.0) internal successors, (7136), 16 states have internal predecessors, (7136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:01,232 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 446.0) internal successors, (7136), 16 states have internal predecessors, (7136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:01,232 INFO L175 Difference]: Start difference. First operand has 88 places, 71 transitions, 611 flow. Second operand 15 states and 2683 transitions. [2023-11-19 07:59:01,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 151 transitions, 1334 flow [2023-11-19 07:59:01,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 151 transitions, 1197 flow, removed 13 selfloop flow, removed 14 redundant places. [2023-11-19 07:59:01,247 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 848 flow [2023-11-19 07:59:01,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=848, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2023-11-19 07:59:01,248 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 66 predicate places. [2023-11-19 07:59:01,248 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 848 flow [2023-11-19 07:59:01,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 172.72727272727272) internal successors, (1900), 11 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:01,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:01,250 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:01,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 07:59:01,250 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:59:01,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:01,251 INFO L85 PathProgramCache]: Analyzing trace with hash 393800708, now seen corresponding path program 10 times [2023-11-19 07:59:01,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:01,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643307658] [2023-11-19 07:59:01,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:01,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-19 07:59:02,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:02,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643307658] [2023-11-19 07:59:02,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643307658] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:02,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:02,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-19 07:59:02,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190484115] [2023-11-19 07:59:02,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:02,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:59:02,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:02,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:59:02,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:59:02,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 446 [2023-11-19 07:59:02,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 848 flow. Second operand has 11 states, 11 states have (on average 173.72727272727272) internal successors, (1911), 11 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:02,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:02,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 446 [2023-11-19 07:59:02,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:03,736 INFO L124 PetriNetUnfolderBase]: 332/616 cut-off events. [2023-11-19 07:59:03,737 INFO L125 PetriNetUnfolderBase]: For 3145/3147 co-relation queries the response was YES. [2023-11-19 07:59:03,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3032 conditions, 616 events. 332/616 cut-off events. For 3145/3147 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2656 event pairs, 38 based on Foata normal form. 1/617 useless extension candidates. Maximal degree in co-relation 2975. Up to 162 conditions per place. [2023-11-19 07:59:03,749 INFO L140 encePairwiseOnDemand]: 434/446 looper letters, 105 selfloop transitions, 34 changer transitions 7/147 dead transitions. [2023-11-19 07:59:03,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 147 transitions, 1405 flow [2023-11-19 07:59:03,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:59:03,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-19 07:59:03,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2340 transitions. [2023-11-19 07:59:03,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40358744394618834 [2023-11-19 07:59:03,759 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2340 transitions. [2023-11-19 07:59:03,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2340 transitions. [2023-11-19 07:59:03,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:03,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2340 transitions. [2023-11-19 07:59:03,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 180.0) internal successors, (2340), 13 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:03,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 446.0) internal successors, (6244), 14 states have internal predecessors, (6244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:03,785 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 446.0) internal successors, (6244), 14 states have internal predecessors, (6244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:03,785 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 848 flow. Second operand 13 states and 2340 transitions. [2023-11-19 07:59:03,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 147 transitions, 1405 flow [2023-11-19 07:59:03,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 147 transitions, 1334 flow, removed 26 selfloop flow, removed 6 redundant places. [2023-11-19 07:59:03,813 INFO L231 Difference]: Finished difference. Result has 101 places, 91 transitions, 894 flow [2023-11-19 07:59:03,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=894, PETRI_PLACES=101, PETRI_TRANSITIONS=91} [2023-11-19 07:59:03,814 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 75 predicate places. [2023-11-19 07:59:03,814 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 91 transitions, 894 flow [2023-11-19 07:59:03,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 173.72727272727272) internal successors, (1911), 11 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:03,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:03,816 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:03,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 07:59:03,816 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:59:03,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:03,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1379456136, now seen corresponding path program 11 times [2023-11-19 07:59:03,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:03,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427998875] [2023-11-19 07:59:03,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:03,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:03,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:59:06,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:06,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427998875] [2023-11-19 07:59:06,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427998875] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:06,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799615387] [2023-11-19 07:59:06,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:59:06,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:06,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:06,052 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:06,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:59:06,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-19 07:59:06,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:59:06,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:59:06,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:06,610 INFO L349 Elim1Store]: treesize reduction 3, result has 91.9 percent of original size [2023-11-19 07:59:06,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 66 [2023-11-19 07:59:06,795 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-19 07:59:06,795 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:59:06,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799615387] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:06,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:59:06,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [16] total 23 [2023-11-19 07:59:06,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210248751] [2023-11-19 07:59:06,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:06,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:59:06,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:06,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:59:06,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:59:07,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 446 [2023-11-19 07:59:07,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 91 transitions, 894 flow. Second operand has 8 states, 8 states have (on average 178.375) internal successors, (1427), 8 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:07,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:07,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 446 [2023-11-19 07:59:07,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:07,742 INFO L124 PetriNetUnfolderBase]: 330/618 cut-off events. [2023-11-19 07:59:07,742 INFO L125 PetriNetUnfolderBase]: For 2985/2987 co-relation queries the response was YES. [2023-11-19 07:59:07,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3036 conditions, 618 events. 330/618 cut-off events. For 2985/2987 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2672 event pairs, 74 based on Foata normal form. 1/619 useless extension candidates. Maximal degree in co-relation 2977. Up to 286 conditions per place. [2023-11-19 07:59:07,752 INFO L140 encePairwiseOnDemand]: 436/446 looper letters, 89 selfloop transitions, 24 changer transitions 7/121 dead transitions. [2023-11-19 07:59:07,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 121 transitions, 1245 flow [2023-11-19 07:59:07,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:59:07,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:59:07,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1478 transitions. [2023-11-19 07:59:07,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.414237668161435 [2023-11-19 07:59:07,758 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1478 transitions. [2023-11-19 07:59:07,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1478 transitions. [2023-11-19 07:59:07,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:07,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1478 transitions. [2023-11-19 07:59:07,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 184.75) internal successors, (1478), 8 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:07,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 446.0) internal successors, (4014), 9 states have internal predecessors, (4014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:07,772 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 446.0) internal successors, (4014), 9 states have internal predecessors, (4014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:07,772 INFO L175 Difference]: Start difference. First operand has 101 places, 91 transitions, 894 flow. Second operand 8 states and 1478 transitions. [2023-11-19 07:59:07,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 121 transitions, 1245 flow [2023-11-19 07:59:07,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 121 transitions, 1173 flow, removed 9 selfloop flow, removed 9 redundant places. [2023-11-19 07:59:07,797 INFO L231 Difference]: Finished difference. Result has 99 places, 90 transitions, 865 flow [2023-11-19 07:59:07,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=865, PETRI_PLACES=99, PETRI_TRANSITIONS=90} [2023-11-19 07:59:07,799 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 73 predicate places. [2023-11-19 07:59:07,799 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 90 transitions, 865 flow [2023-11-19 07:59:07,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.375) internal successors, (1427), 8 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:07,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:07,800 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:07,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:59:08,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7a5eb3-9704-408e-8074-f48ece8af6bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 07:59:08,016 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:59:08,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:08,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1200140684, now seen corresponding path program 12 times [2023-11-19 07:59:08,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:08,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98010049] [2023-11-19 07:59:08,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:08,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:08,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-19 07:59:08,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:08,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98010049] [2023-11-19 07:59:08,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98010049] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:08,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:08,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-19 07:59:08,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305517647] [2023-11-19 07:59:08,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:08,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:59:08,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:08,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:59:08,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:59:09,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 446 [2023-11-19 07:59:09,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 90 transitions, 865 flow. Second operand has 11 states, 11 states have (on average 172.72727272727272) internal successors, (1900), 11 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:09,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:09,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 446 [2023-11-19 07:59:09,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:10,045 INFO L124 PetriNetUnfolderBase]: 328/604 cut-off events. [2023-11-19 07:59:10,046 INFO L125 PetriNetUnfolderBase]: For 2966/2968 co-relation queries the response was YES. [2023-11-19 07:59:10,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2929 conditions, 604 events. 328/604 cut-off events. For 2966/2968 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2553 event pairs, 38 based on Foata normal form. 1/605 useless extension candidates. Maximal degree in co-relation 2873. Up to 162 conditions per place. [2023-11-19 07:59:10,054 INFO L140 encePairwiseOnDemand]: 434/446 looper letters, 99 selfloop transitions, 35 changer transitions 9/144 dead transitions. [2023-11-19 07:59:10,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 144 transitions, 1365 flow [2023-11-19 07:59:10,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:59:10,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 07:59:10,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2502 transitions. [2023-11-19 07:59:10,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40070467648942987 [2023-11-19 07:59:10,060 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2502 transitions. [2023-11-19 07:59:10,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2502 transitions. [2023-11-19 07:59:10,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:10,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2502 transitions. [2023-11-19 07:59:10,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 178.71428571428572) internal successors, (2502), 14 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:10,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 446.0) internal successors, (6690), 15 states have internal predecessors, (6690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:10,076 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 446.0) internal successors, (6690), 15 states have internal predecessors, (6690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:10,076 INFO L175 Difference]: Start difference. First operand has 99 places, 90 transitions, 865 flow. Second operand 14 states and 2502 transitions. [2023-11-19 07:59:10,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 144 transitions, 1365 flow [2023-11-19 07:59:10,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 144 transitions, 1303 flow, removed 5 selfloop flow, removed 8 redundant places. [2023-11-19 07:59:10,094 INFO L231 Difference]: Finished difference. Result has 103 places, 87 transitions, 847 flow [2023-11-19 07:59:10,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=847, PETRI_PLACES=103, PETRI_TRANSITIONS=87} [2023-11-19 07:59:10,095 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 77 predicate places. [2023-11-19 07:59:10,095 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 87 transitions, 847 flow [2023-11-19 07:59:10,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 172.72727272727272) internal successors, (1900), 11 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:10,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:10,096 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:10,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-19 07:59:10,096 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:59:10,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:10,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1928744836, now seen corresponding path program 13 times [2023-11-19 07:59:10,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:10,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246230236] [2023-11-19 07:59:10,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:10,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:10,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat