./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-series.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_4b0d8ec2-058b-4d04-bd5c-d04a0980165c/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0d8ec2-058b-4d04-bd5c-d04a0980165c/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_4b0d8ec2-058b-4d04-bd5c-d04a0980165c/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0d8ec2-058b-4d04-bd5c-d04a0980165c/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0d8ec2-058b-4d04-bd5c-d04a0980165c/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_4b0d8ec2-058b-4d04-bd5c-d04a0980165c/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 8dbd267b0e0821e8d358e8d234024d8e484ea32431972ed8b70b87052179a50c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:07:03,381 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:07:03,502 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0d8ec2-058b-4d04-bd5c-d04a0980165c/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:07:03,511 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:07:03,511 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:07:03,553 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:07:03,555 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:07:03,556 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:07:03,557 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:07:03,562 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:07:03,563 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:07:03,564 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:07:03,564 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:07:03,566 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:07:03,567 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:07:03,567 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:07:03,567 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:07:03,568 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:07:03,568 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:07:03,569 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:07:03,569 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:07:03,570 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:07:03,570 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:07:03,571 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:07:03,571 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:07:03,572 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:07:03,572 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:07:03,573 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:07:03,573 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:07:03,585 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:07:03,586 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:07:03,586 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:07:03,587 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:07:03,587 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:07:03,587 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:07:03,587 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:07:03,588 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:07:03,588 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:07:03,588 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:07:03,588 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_4b0d8ec2-058b-4d04-bd5c-d04a0980165c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0d8ec2-058b-4d04-bd5c-d04a0980165c/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dbd267b0e0821e8d358e8d234024d8e484ea32431972ed8b70b87052179a50c [2023-11-19 08:07:03,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:07:03,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:07:03,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:07:03,912 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:07:03,913 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:07:03,914 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0d8ec2-058b-4d04-bd5c-d04a0980165c/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2023-11-19 08:07:06,993 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:07:07,290 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:07:07,309 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0d8ec2-058b-4d04-bd5c-d04a0980165c/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2023-11-19 08:07:07,318 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0d8ec2-058b-4d04-bd5c-d04a0980165c/bin/uautomizer-verify-uCwYo4JHxu/data/ba7091d6a/da5e4c28cf3b47fe8cb06fb465f86618/FLAG16b62e761 [2023-11-19 08:07:07,346 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0d8ec2-058b-4d04-bd5c-d04a0980165c/bin/uautomizer-verify-uCwYo4JHxu/data/ba7091d6a/da5e4c28cf3b47fe8cb06fb465f86618 [2023-11-19 08:07:07,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:07:07,356 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:07:07,361 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:07:07,361 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:07:07,367 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:07:07,368 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:07:07" (1/1) ... [2023-11-19 08:07:07,369 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d85ec6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:07, skipping insertion in model container [2023-11-19 08:07:07,369 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:07:07" (1/1) ... [2023-11-19 08:07:07,413 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:07:07,663 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_4b0d8ec2-058b-4d04-bd5c-d04a0980165c/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c[4403,4416] [2023-11-19 08:07:07,685 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:07:07,697 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:07:07,730 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_4b0d8ec2-058b-4d04-bd5c-d04a0980165c/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c[4403,4416] [2023-11-19 08:07:07,735 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:07:07,749 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:07:07,750 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:07:07,756 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:07:07,757 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:07 WrapperNode [2023-11-19 08:07:07,757 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:07:07,758 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:07:07,759 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:07:07,759 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:07:07,767 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:07" (1/1) ... [2023-11-19 08:07:07,778 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:07" (1/1) ... [2023-11-19 08:07:07,835 INFO L138 Inliner]: procedures = 27, calls = 87, calls flagged for inlining = 22, calls inlined = 28, statements flattened = 364 [2023-11-19 08:07:07,836 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:07:07,837 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:07:07,838 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:07:07,838 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:07:07,847 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:07" (1/1) ... [2023-11-19 08:07:07,847 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:07" (1/1) ... [2023-11-19 08:07:07,853 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:07" (1/1) ... [2023-11-19 08:07:07,854 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:07" (1/1) ... [2023-11-19 08:07:07,869 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:07" (1/1) ... [2023-11-19 08:07:07,875 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:07" (1/1) ... [2023-11-19 08:07:07,878 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:07" (1/1) ... [2023-11-19 08:07:07,881 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:07" (1/1) ... [2023-11-19 08:07:07,887 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:07:07,888 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:07:07,888 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:07:07,889 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:07:07,889 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:07" (1/1) ... [2023-11-19 08:07:07,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:07:07,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0d8ec2-058b-4d04-bd5c-d04a0980165c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:07,942 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0d8ec2-058b-4d04-bd5c-d04a0980165c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:07:07,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0d8ec2-058b-4d04-bd5c-d04a0980165c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:07:07,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:07:07,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:07:07,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:07:07,976 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:07:07,976 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 08:07:07,976 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 08:07:07,976 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 08:07:07,976 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 08:07:07,977 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 08:07:07,977 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 08:07:07,977 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-19 08:07:07,977 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-19 08:07:07,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:07:07,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 08:07:07,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 08:07:07,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 08:07:07,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:07:07,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:07:07,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:07:07,980 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 08:07:08,104 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:07:08,106 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:07:08,669 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:07:08,927 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:07:08,927 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-19 08:07:08,934 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:07:08 BoogieIcfgContainer [2023-11-19 08:07:08,935 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:07:08,938 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:07:08,939 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:07:08,943 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:07:08,943 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:07:07" (1/3) ... [2023-11-19 08:07:08,944 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3759d2f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:07:08, skipping insertion in model container [2023-11-19 08:07:08,946 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:07" (2/3) ... [2023-11-19 08:07:08,948 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3759d2f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:07:08, skipping insertion in model container [2023-11-19 08:07:08,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:07:08" (3/3) ... [2023-11-19 08:07:08,950 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series.wvr.c [2023-11-19 08:07:08,960 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 08:07:08,970 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:07:08,970 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:07:08,970 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:07:09,056 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-19 08:07:09,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 269 places, 278 transitions, 584 flow [2023-11-19 08:07:09,265 INFO L124 PetriNetUnfolderBase]: 22/274 cut-off events. [2023-11-19 08:07:09,265 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 08:07:09,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291 conditions, 274 events. 22/274 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 144 event pairs, 0 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 234. Up to 2 conditions per place. [2023-11-19 08:07:09,274 INFO L82 GeneralOperation]: Start removeDead. Operand has 269 places, 278 transitions, 584 flow [2023-11-19 08:07:09,287 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 252 places, 261 transitions, 546 flow [2023-11-19 08:07:09,291 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:07:09,306 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 252 places, 261 transitions, 546 flow [2023-11-19 08:07:09,308 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 252 places, 261 transitions, 546 flow [2023-11-19 08:07:09,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 252 places, 261 transitions, 546 flow [2023-11-19 08:07:09,370 INFO L124 PetriNetUnfolderBase]: 22/261 cut-off events. [2023-11-19 08:07:09,370 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 08:07:09,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 261 events. 22/261 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 142 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 234. Up to 2 conditions per place. [2023-11-19 08:07:09,376 INFO L119 LiptonReduction]: Number of co-enabled transitions 2348 [2023-11-19 08:07:22,011 INFO L134 LiptonReduction]: Checked pairs total: 4498 [2023-11-19 08:07:22,011 INFO L136 LiptonReduction]: Total number of compositions: 270 [2023-11-19 08:07:22,028 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:07:22,034 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;@9670325, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:07:22,035 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-19 08:07:22,044 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:07:22,045 INFO L124 PetriNetUnfolderBase]: 7/38 cut-off events. [2023-11-19 08:07:22,045 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 08:07:22,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:07:22,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:22,046 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 08:07:22,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:22,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1551590742, now seen corresponding path program 1 times [2023-11-19 08:07:22,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:22,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798317272] [2023-11-19 08:07:22,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:22,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:22,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:22,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:22,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798317272] [2023-11-19 08:07:22,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798317272] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:22,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:22,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:07:22,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845630847] [2023-11-19 08:07:22,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:22,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:07:22,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:22,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:07:22,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:07:22,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 548 [2023-11-19 08:07:22,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:22,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:07:22,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 548 [2023-11-19 08:07:22,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:07:23,398 INFO L124 PetriNetUnfolderBase]: 3312/4573 cut-off events. [2023-11-19 08:07:23,398 INFO L125 PetriNetUnfolderBase]: For 293/293 co-relation queries the response was YES. [2023-11-19 08:07:23,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9129 conditions, 4573 events. 3312/4573 cut-off events. For 293/293 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 19217 event pairs, 1113 based on Foata normal form. 1/3475 useless extension candidates. Maximal degree in co-relation 7432. Up to 2377 conditions per place. [2023-11-19 08:07:23,439 INFO L140 encePairwiseOnDemand]: 544/548 looper letters, 57 selfloop transitions, 3 changer transitions 1/63 dead transitions. [2023-11-19 08:07:23,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 63 transitions, 287 flow [2023-11-19 08:07:23,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:07:23,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:07:23,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 803 transitions. [2023-11-19 08:07:23,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4884428223844282 [2023-11-19 08:07:23,464 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 803 transitions. [2023-11-19 08:07:23,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 803 transitions. [2023-11-19 08:07:23,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:07:23,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 803 transitions. [2023-11-19 08:07:23,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 267.6666666666667) internal successors, (803), 3 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:23,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 548.0) internal successors, (2192), 4 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:23,492 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 548.0) internal successors, (2192), 4 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:23,494 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 102 flow. Second operand 3 states and 803 transitions. [2023-11-19 08:07:23,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 63 transitions, 287 flow [2023-11-19 08:07:23,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 63 transitions, 261 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-19 08:07:23,509 INFO L231 Difference]: Finished difference. Result has 40 places, 41 transitions, 105 flow [2023-11-19 08:07:23,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=40, PETRI_TRANSITIONS=41} [2023-11-19 08:07:23,515 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -5 predicate places. [2023-11-19 08:07:23,516 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 41 transitions, 105 flow [2023-11-19 08:07:23,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:23,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:07:23,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:23,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:07:23,518 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 08:07:23,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:23,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1556994391, now seen corresponding path program 1 times [2023-11-19 08:07:23,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:23,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041120507] [2023-11-19 08:07:23,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:23,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:23,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:23,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041120507] [2023-11-19 08:07:23,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041120507] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:23,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:23,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:07:23,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070720060] [2023-11-19 08:07:23,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:23,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:07:23,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:23,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:07:23,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:07:23,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 548 [2023-11-19 08:07:23,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 41 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:23,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:07:23,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 548 [2023-11-19 08:07:23,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:07:24,706 INFO L124 PetriNetUnfolderBase]: 4564/6132 cut-off events. [2023-11-19 08:07:24,706 INFO L125 PetriNetUnfolderBase]: For 920/920 co-relation queries the response was YES. [2023-11-19 08:07:24,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13418 conditions, 6132 events. 4564/6132 cut-off events. For 920/920 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 26516 event pairs, 1543 based on Foata normal form. 164/5523 useless extension candidates. Maximal degree in co-relation 5735. Up to 3678 conditions per place. [2023-11-19 08:07:24,756 INFO L140 encePairwiseOnDemand]: 545/548 looper letters, 62 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-11-19 08:07:24,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 66 transitions, 296 flow [2023-11-19 08:07:24,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:07:24,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:07:24,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 794 transitions. [2023-11-19 08:07:24,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4829683698296837 [2023-11-19 08:07:24,761 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 794 transitions. [2023-11-19 08:07:24,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 794 transitions. [2023-11-19 08:07:24,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:07:24,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 794 transitions. [2023-11-19 08:07:24,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 264.6666666666667) internal successors, (794), 3 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:24,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 548.0) internal successors, (2192), 4 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:24,771 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 548.0) internal successors, (2192), 4 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:24,771 INFO L175 Difference]: Start difference. First operand has 40 places, 41 transitions, 105 flow. Second operand 3 states and 794 transitions. [2023-11-19 08:07:24,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 66 transitions, 296 flow [2023-11-19 08:07:24,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 66 transitions, 292 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:07:24,774 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 116 flow [2023-11-19 08:07:24,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2023-11-19 08:07:24,775 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -3 predicate places. [2023-11-19 08:07:24,775 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 116 flow [2023-11-19 08:07:24,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:24,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:07:24,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:24,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:07:24,777 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 08:07:24,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:24,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1996887033, now seen corresponding path program 1 times [2023-11-19 08:07:24,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:24,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36167636] [2023-11-19 08:07:24,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:24,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:24,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:24,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:24,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36167636] [2023-11-19 08:07:24,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36167636] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:24,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:24,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:07:24,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619472129] [2023-11-19 08:07:24,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:24,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:07:24,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:24,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:07:24,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:07:24,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 548 [2023-11-19 08:07:24,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:24,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:07:24,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 548 [2023-11-19 08:07:24,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:07:25,991 INFO L124 PetriNetUnfolderBase]: 5720/7897 cut-off events. [2023-11-19 08:07:25,991 INFO L125 PetriNetUnfolderBase]: For 2277/2277 co-relation queries the response was YES. [2023-11-19 08:07:26,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17798 conditions, 7897 events. 5720/7897 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 36715 event pairs, 2010 based on Foata normal form. 244/7642 useless extension candidates. Maximal degree in co-relation 9637. Up to 4925 conditions per place. [2023-11-19 08:07:26,055 INFO L140 encePairwiseOnDemand]: 545/548 looper letters, 66 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-11-19 08:07:26,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 70 transitions, 330 flow [2023-11-19 08:07:26,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:07:26,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:07:26,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 796 transitions. [2023-11-19 08:07:26,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48418491484184917 [2023-11-19 08:07:26,061 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 796 transitions. [2023-11-19 08:07:26,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 796 transitions. [2023-11-19 08:07:26,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:07:26,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 796 transitions. [2023-11-19 08:07:26,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:26,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 548.0) internal successors, (2192), 4 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:26,072 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 548.0) internal successors, (2192), 4 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:26,073 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 116 flow. Second operand 3 states and 796 transitions. [2023-11-19 08:07:26,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 70 transitions, 330 flow [2023-11-19 08:07:26,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 70 transitions, 327 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:07:26,077 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 128 flow [2023-11-19 08:07:26,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-11-19 08:07:26,078 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -1 predicate places. [2023-11-19 08:07:26,078 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 128 flow [2023-11-19 08:07:26,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:26,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:07:26,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:26,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:07:26,080 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 08:07:26,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:26,081 INFO L85 PathProgramCache]: Analyzing trace with hash 683362093, now seen corresponding path program 1 times [2023-11-19 08:07:26,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:26,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546077035] [2023-11-19 08:07:26,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:26,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:26,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:07:26,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:26,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546077035] [2023-11-19 08:07:26,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546077035] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:26,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:26,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:07:26,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974473486] [2023-11-19 08:07:26,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:26,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:07:26,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:26,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:07:26,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:07:26,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 548 [2023-11-19 08:07:26,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 235.75) internal successors, (943), 4 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:26,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:07:26,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 548 [2023-11-19 08:07:26,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:07:27,947 INFO L124 PetriNetUnfolderBase]: 7676/10720 cut-off events. [2023-11-19 08:07:27,947 INFO L125 PetriNetUnfolderBase]: For 3981/3981 co-relation queries the response was YES. [2023-11-19 08:07:27,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24813 conditions, 10720 events. 7676/10720 cut-off events. For 3981/3981 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 51549 event pairs, 6276 based on Foata normal form. 194/10818 useless extension candidates. Maximal degree in co-relation 14333. Up to 7659 conditions per place. [2023-11-19 08:07:28,025 INFO L140 encePairwiseOnDemand]: 544/548 looper letters, 73 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2023-11-19 08:07:28,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 78 transitions, 372 flow [2023-11-19 08:07:28,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:07:28,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:07:28,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 983 transitions. [2023-11-19 08:07:28,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44844890510948904 [2023-11-19 08:07:28,031 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 983 transitions. [2023-11-19 08:07:28,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 983 transitions. [2023-11-19 08:07:28,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:07:28,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 983 transitions. [2023-11-19 08:07:28,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 245.75) internal successors, (983), 4 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:28,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 548.0) internal successors, (2740), 5 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:28,044 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 548.0) internal successors, (2740), 5 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:28,045 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 128 flow. Second operand 4 states and 983 transitions. [2023-11-19 08:07:28,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 78 transitions, 372 flow [2023-11-19 08:07:28,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 78 transitions, 370 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:07:28,052 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 146 flow [2023-11-19 08:07:28,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2023-11-19 08:07:28,054 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-11-19 08:07:28,055 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 146 flow [2023-11-19 08:07:28,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 235.75) internal successors, (943), 4 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:28,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:07:28,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:28,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 08:07:28,057 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 08:07:28,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:28,057 INFO L85 PathProgramCache]: Analyzing trace with hash 890237397, now seen corresponding path program 1 times [2023-11-19 08:07:28,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:28,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377208664] [2023-11-19 08:07:28,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:28,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:07:28,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:28,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377208664] [2023-11-19 08:07:28,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377208664] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:28,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:28,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:07:28,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194664560] [2023-11-19 08:07:28,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:28,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:07:28,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:28,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:07:28,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:07:28,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 548 [2023-11-19 08:07:28,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 235.75) internal successors, (943), 4 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:28,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:07:28,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 548 [2023-11-19 08:07:28,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:07:30,234 INFO L124 PetriNetUnfolderBase]: 10249/14546 cut-off events. [2023-11-19 08:07:30,234 INFO L125 PetriNetUnfolderBase]: For 5404/5404 co-relation queries the response was YES. [2023-11-19 08:07:30,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33128 conditions, 14546 events. 10249/14546 cut-off events. For 5404/5404 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 75991 event pairs, 8647 based on Foata normal form. 348/14837 useless extension candidates. Maximal degree in co-relation 24994. Up to 10316 conditions per place. [2023-11-19 08:07:30,322 INFO L140 encePairwiseOnDemand]: 544/548 looper letters, 72 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2023-11-19 08:07:30,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 78 transitions, 388 flow [2023-11-19 08:07:30,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:07:30,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:07:30,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 981 transitions. [2023-11-19 08:07:30,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44753649635036497 [2023-11-19 08:07:30,327 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 981 transitions. [2023-11-19 08:07:30,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 981 transitions. [2023-11-19 08:07:30,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:07:30,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 981 transitions. [2023-11-19 08:07:30,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 245.25) internal successors, (981), 4 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:30,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 548.0) internal successors, (2740), 5 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:30,340 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 548.0) internal successors, (2740), 5 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:30,340 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 146 flow. Second operand 4 states and 981 transitions. [2023-11-19 08:07:30,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 78 transitions, 388 flow [2023-11-19 08:07:30,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 78 transitions, 384 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 08:07:30,346 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 165 flow [2023-11-19 08:07:30,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2023-11-19 08:07:30,350 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 7 predicate places. [2023-11-19 08:07:30,350 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 165 flow [2023-11-19 08:07:30,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 235.75) internal successors, (943), 4 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:30,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:07:30,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:30,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 08:07:30,352 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 08:07:30,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:30,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1384425052, now seen corresponding path program 1 times [2023-11-19 08:07:30,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:30,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713472988] [2023-11-19 08:07:30,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:30,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:31,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:07:31,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:31,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713472988] [2023-11-19 08:07:31,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713472988] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:31,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:31,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:07:31,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657114885] [2023-11-19 08:07:31,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:31,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:07:31,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:31,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:07:31,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:07:31,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 548 [2023-11-19 08:07:31,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 165 flow. Second operand has 6 states, 6 states have (on average 229.33333333333334) internal successors, (1376), 6 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:31,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:07:31,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 548 [2023-11-19 08:07:31,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:07:34,085 INFO L124 PetriNetUnfolderBase]: 16630/23465 cut-off events. [2023-11-19 08:07:34,086 INFO L125 PetriNetUnfolderBase]: For 8001/8001 co-relation queries the response was YES. [2023-11-19 08:07:34,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53653 conditions, 23465 events. 16630/23465 cut-off events. For 8001/8001 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 135156 event pairs, 6480 based on Foata normal form. 274/23729 useless extension candidates. Maximal degree in co-relation 37254. Up to 8897 conditions per place. [2023-11-19 08:07:34,191 INFO L140 encePairwiseOnDemand]: 541/548 looper letters, 117 selfloop transitions, 7 changer transitions 0/126 dead transitions. [2023-11-19 08:07:34,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 126 transitions, 643 flow [2023-11-19 08:07:34,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:07:34,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:07:34,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1455 transitions. [2023-11-19 08:07:34,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425182481751825 [2023-11-19 08:07:34,197 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1455 transitions. [2023-11-19 08:07:34,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1455 transitions. [2023-11-19 08:07:34,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:07:34,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1455 transitions. [2023-11-19 08:07:34,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 242.5) internal successors, (1455), 6 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:34,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 548.0) internal successors, (3836), 7 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:34,211 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 548.0) internal successors, (3836), 7 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:34,211 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 165 flow. Second operand 6 states and 1455 transitions. [2023-11-19 08:07:34,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 126 transitions, 643 flow [2023-11-19 08:07:34,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 126 transitions, 638 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 08:07:34,220 INFO L231 Difference]: Finished difference. Result has 60 places, 51 transitions, 204 flow [2023-11-19 08:07:34,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=204, PETRI_PLACES=60, PETRI_TRANSITIONS=51} [2023-11-19 08:07:34,223 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 15 predicate places. [2023-11-19 08:07:34,223 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 51 transitions, 204 flow [2023-11-19 08:07:34,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 229.33333333333334) internal successors, (1376), 6 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:34,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:07:34,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:34,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 08:07:34,225 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 08:07:34,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:34,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1293062619, now seen corresponding path program 1 times [2023-11-19 08:07:34,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:34,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341393110] [2023-11-19 08:07:34,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:34,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:34,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:07:34,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:34,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341393110] [2023-11-19 08:07:34,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341393110] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:34,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:34,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:07:34,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989227506] [2023-11-19 08:07:34,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:34,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:07:34,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:34,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:07:34,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:07:34,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 548 [2023-11-19 08:07:34,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 51 transitions, 204 flow. Second operand has 6 states, 6 states have (on average 229.33333333333334) internal successors, (1376), 6 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:34,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:07:34,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 548 [2023-11-19 08:07:34,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:07:37,381 INFO L124 PetriNetUnfolderBase]: 15689/22154 cut-off events. [2023-11-19 08:07:37,381 INFO L125 PetriNetUnfolderBase]: For 10612/10612 co-relation queries the response was YES. [2023-11-19 08:07:37,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53307 conditions, 22154 events. 15689/22154 cut-off events. For 10612/10612 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 125181 event pairs, 7325 based on Foata normal form. 192/22284 useless extension candidates. Maximal degree in co-relation 39424. Up to 10566 conditions per place. [2023-11-19 08:07:37,501 INFO L140 encePairwiseOnDemand]: 541/548 looper letters, 71 selfloop transitions, 5 changer transitions 37/115 dead transitions. [2023-11-19 08:07:37,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 115 transitions, 612 flow [2023-11-19 08:07:37,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:07:37,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:07:37,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1446 transitions. [2023-11-19 08:07:37,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4397810218978102 [2023-11-19 08:07:37,510 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1446 transitions. [2023-11-19 08:07:37,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1446 transitions. [2023-11-19 08:07:37,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:07:37,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1446 transitions. [2023-11-19 08:07:37,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 241.0) internal successors, (1446), 6 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:37,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 548.0) internal successors, (3836), 7 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:37,526 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 548.0) internal successors, (3836), 7 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:37,526 INFO L175 Difference]: Start difference. First operand has 60 places, 51 transitions, 204 flow. Second operand 6 states and 1446 transitions. [2023-11-19 08:07:37,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 115 transitions, 612 flow [2023-11-19 08:07:37,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 115 transitions, 607 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 08:07:37,538 INFO L231 Difference]: Finished difference. Result has 67 places, 50 transitions, 211 flow [2023-11-19 08:07:37,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=211, PETRI_PLACES=67, PETRI_TRANSITIONS=50} [2023-11-19 08:07:37,540 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 22 predicate places. [2023-11-19 08:07:37,540 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 50 transitions, 211 flow [2023-11-19 08:07:37,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 229.33333333333334) internal successors, (1376), 6 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:37,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:07:37,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:37,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 08:07:37,542 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 08:07:37,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:37,542 INFO L85 PathProgramCache]: Analyzing trace with hash 906619269, now seen corresponding path program 1 times [2023-11-19 08:07:37,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:37,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458026441] [2023-11-19 08:07:37,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:37,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:37,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:37,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 08:07:37,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:37,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458026441] [2023-11-19 08:07:37,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458026441] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:37,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:37,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:07:37,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765856990] [2023-11-19 08:07:37,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:37,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:07:37,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:37,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:07:37,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:07:38,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 548 [2023-11-19 08:07:38,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 50 transitions, 211 flow. Second operand has 6 states, 6 states have (on average 229.5) internal successors, (1377), 6 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:38,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:07:38,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 548 [2023-11-19 08:07:38,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:07:39,927 INFO L124 PetriNetUnfolderBase]: 10229/14000 cut-off events. [2023-11-19 08:07:39,927 INFO L125 PetriNetUnfolderBase]: For 9022/9022 co-relation queries the response was YES. [2023-11-19 08:07:39,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37362 conditions, 14000 events. 10229/14000 cut-off events. For 9022/9022 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 71629 event pairs, 1010 based on Foata normal form. 624/14620 useless extension candidates. Maximal degree in co-relation 32021. Up to 7996 conditions per place. [2023-11-19 08:07:40,024 INFO L140 encePairwiseOnDemand]: 542/548 looper letters, 81 selfloop transitions, 6 changer transitions 1/90 dead transitions. [2023-11-19 08:07:40,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 90 transitions, 527 flow [2023-11-19 08:07:40,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:07:40,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:07:40,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1418 transitions. [2023-11-19 08:07:40,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43126520681265207 [2023-11-19 08:07:40,031 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1418 transitions. [2023-11-19 08:07:40,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1418 transitions. [2023-11-19 08:07:40,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:07:40,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1418 transitions. [2023-11-19 08:07:40,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 236.33333333333334) internal successors, (1418), 6 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:40,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 548.0) internal successors, (3836), 7 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:40,046 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 548.0) internal successors, (3836), 7 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:40,046 INFO L175 Difference]: Start difference. First operand has 67 places, 50 transitions, 211 flow. Second operand 6 states and 1418 transitions. [2023-11-19 08:07:40,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 90 transitions, 527 flow [2023-11-19 08:07:40,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 90 transitions, 504 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-11-19 08:07:40,056 INFO L231 Difference]: Finished difference. Result has 63 places, 49 transitions, 206 flow [2023-11-19 08:07:40,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=206, PETRI_PLACES=63, PETRI_TRANSITIONS=49} [2023-11-19 08:07:40,060 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 18 predicate places. [2023-11-19 08:07:40,060 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 49 transitions, 206 flow [2023-11-19 08:07:40,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 229.5) internal successors, (1377), 6 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:40,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:07:40,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:40,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 08:07:40,062 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 08:07:40,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:40,062 INFO L85 PathProgramCache]: Analyzing trace with hash -249360620, now seen corresponding path program 1 times [2023-11-19 08:07:40,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:40,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743670971] [2023-11-19 08:07:40,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:40,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:40,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:40,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 08:07:40,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:40,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743670971] [2023-11-19 08:07:40,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743670971] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:40,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:40,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:07:40,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611418256] [2023-11-19 08:07:40,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:40,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:07:40,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:40,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:07:40,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:07:40,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 548 [2023-11-19 08:07:40,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 49 transitions, 206 flow. Second operand has 6 states, 6 states have (on average 225.5) internal successors, (1353), 6 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:40,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:07:40,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 548 [2023-11-19 08:07:40,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:07:42,285 INFO L124 PetriNetUnfolderBase]: 9398/12651 cut-off events. [2023-11-19 08:07:42,285 INFO L125 PetriNetUnfolderBase]: For 9992/9992 co-relation queries the response was YES. [2023-11-19 08:07:42,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34435 conditions, 12651 events. 9398/12651 cut-off events. For 9992/9992 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 58283 event pairs, 2400 based on Foata normal form. 662/13311 useless extension candidates. Maximal degree in co-relation 34403. Up to 5974 conditions per place. [2023-11-19 08:07:42,356 INFO L140 encePairwiseOnDemand]: 540/548 looper letters, 99 selfloop transitions, 9 changer transitions 11/120 dead transitions. [2023-11-19 08:07:42,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 120 transitions, 705 flow [2023-11-19 08:07:42,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 08:07:42,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 08:07:42,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1641 transitions. [2023-11-19 08:07:42,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4277893639207508 [2023-11-19 08:07:42,365 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1641 transitions. [2023-11-19 08:07:42,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1641 transitions. [2023-11-19 08:07:42,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:07:42,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1641 transitions. [2023-11-19 08:07:42,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 234.42857142857142) internal successors, (1641), 7 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:42,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 548.0) internal successors, (4384), 8 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:42,383 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 548.0) internal successors, (4384), 8 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:42,383 INFO L175 Difference]: Start difference. First operand has 63 places, 49 transitions, 206 flow. Second operand 7 states and 1641 transitions. [2023-11-19 08:07:42,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 120 transitions, 705 flow [2023-11-19 08:07:42,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 120 transitions, 673 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-11-19 08:07:42,392 INFO L231 Difference]: Finished difference. Result has 65 places, 54 transitions, 247 flow [2023-11-19 08:07:42,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=247, PETRI_PLACES=65, PETRI_TRANSITIONS=54} [2023-11-19 08:07:42,393 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 20 predicate places. [2023-11-19 08:07:42,393 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 54 transitions, 247 flow [2023-11-19 08:07:42,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 225.5) internal successors, (1353), 6 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:42,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:07:42,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:42,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 08:07:42,394 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 08:07:42,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:42,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1269831670, now seen corresponding path program 1 times [2023-11-19 08:07:42,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:42,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433785971] [2023-11-19 08:07:42,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:42,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 08:07:42,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:42,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433785971] [2023-11-19 08:07:42,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433785971] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:07:42,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602675487] [2023-11-19 08:07:42,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:42,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:42,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0d8ec2-058b-4d04-bd5c-d04a0980165c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:42,744 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0d8ec2-058b-4d04-bd5c-d04a0980165c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:42,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0d8ec2-058b-4d04-bd5c-d04a0980165c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:07:42,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:42,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 08:07:42,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:43,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 08:07:43,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:07:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 08:07:43,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602675487] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 08:07:43,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:07:43,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 11 [2023-11-19 08:07:43,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264579576] [2023-11-19 08:07:43,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:43,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:07:43,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:43,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:07:43,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:07:43,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 548 [2023-11-19 08:07:43,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 54 transitions, 247 flow. Second operand has 7 states, 7 states have (on average 238.28571428571428) internal successors, (1668), 7 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:43,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:07:43,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 548 [2023-11-19 08:07:43,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:07:45,552 INFO L124 PetriNetUnfolderBase]: 12526/16673 cut-off events. [2023-11-19 08:07:45,552 INFO L125 PetriNetUnfolderBase]: For 17415/17415 co-relation queries the response was YES. [2023-11-19 08:07:45,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50666 conditions, 16673 events. 12526/16673 cut-off events. For 17415/17415 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 78464 event pairs, 1545 based on Foata normal form. 300/16972 useless extension candidates. Maximal degree in co-relation 50633. Up to 4726 conditions per place. [2023-11-19 08:07:45,638 INFO L140 encePairwiseOnDemand]: 539/548 looper letters, 152 selfloop transitions, 30 changer transitions 0/182 dead transitions. [2023-11-19 08:07:45,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 182 transitions, 1092 flow [2023-11-19 08:07:45,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 08:07:45,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 08:07:45,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2010 transitions. [2023-11-19 08:07:45,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458485401459854 [2023-11-19 08:07:45,647 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2010 transitions. [2023-11-19 08:07:45,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2010 transitions. [2023-11-19 08:07:45,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:07:45,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2010 transitions. [2023-11-19 08:07:45,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 251.25) internal successors, (2010), 8 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:45,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 548.0) internal successors, (4932), 9 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:45,663 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 548.0) internal successors, (4932), 9 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:45,664 INFO L175 Difference]: Start difference. First operand has 65 places, 54 transitions, 247 flow. Second operand 8 states and 2010 transitions. [2023-11-19 08:07:45,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 182 transitions, 1092 flow [2023-11-19 08:07:45,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 182 transitions, 1073 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-11-19 08:07:45,729 INFO L231 Difference]: Finished difference. Result has 73 places, 78 transitions, 502 flow [2023-11-19 08:07:45,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=502, PETRI_PLACES=73, PETRI_TRANSITIONS=78} [2023-11-19 08:07:45,730 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 28 predicate places. [2023-11-19 08:07:45,730 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 78 transitions, 502 flow [2023-11-19 08:07:45,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 238.28571428571428) internal successors, (1668), 7 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:45,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:07:45,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:45,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0d8ec2-058b-4d04-bd5c-d04a0980165c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 08:07:45,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0d8ec2-058b-4d04-bd5c-d04a0980165c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 08:07:45,948 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 08:07:45,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:45,950 INFO L85 PathProgramCache]: Analyzing trace with hash -424210728, now seen corresponding path program 1 times [2023-11-19 08:07:45,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:45,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283175324] [2023-11-19 08:07:45,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:45,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:46,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:46,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 08:07:46,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:46,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283175324] [2023-11-19 08:07:46,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283175324] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:46,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:46,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:07:46,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74962112] [2023-11-19 08:07:46,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:46,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:07:46,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:46,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:07:46,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:07:46,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 548 [2023-11-19 08:07:46,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 78 transitions, 502 flow. Second operand has 6 states, 6 states have (on average 226.0) internal successors, (1356), 6 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:46,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:07:46,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 548 [2023-11-19 08:07:46,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:07:49,087 INFO L124 PetriNetUnfolderBase]: 13824/18563 cut-off events. [2023-11-19 08:07:49,087 INFO L125 PetriNetUnfolderBase]: For 53735/54116 co-relation queries the response was YES. [2023-11-19 08:07:49,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67806 conditions, 18563 events. 13824/18563 cut-off events. For 53735/54116 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 91423 event pairs, 1980 based on Foata normal form. 958/19452 useless extension candidates. Maximal degree in co-relation 67768. Up to 12077 conditions per place. [2023-11-19 08:07:49,204 INFO L140 encePairwiseOnDemand]: 540/548 looper letters, 162 selfloop transitions, 9 changer transitions 0/177 dead transitions. [2023-11-19 08:07:49,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 177 transitions, 1550 flow [2023-11-19 08:07:49,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 08:07:49,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 08:07:49,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1631 transitions. [2023-11-19 08:07:49,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251824817518248 [2023-11-19 08:07:49,212 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1631 transitions. [2023-11-19 08:07:49,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1631 transitions. [2023-11-19 08:07:49,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:07:49,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1631 transitions. [2023-11-19 08:07:49,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 233.0) internal successors, (1631), 7 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:49,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 548.0) internal successors, (4384), 8 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:49,231 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 548.0) internal successors, (4384), 8 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:49,231 INFO L175 Difference]: Start difference. First operand has 73 places, 78 transitions, 502 flow. Second operand 7 states and 1631 transitions. [2023-11-19 08:07:49,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 177 transitions, 1550 flow [2023-11-19 08:07:49,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 177 transitions, 1461 flow, removed 44 selfloop flow, removed 1 redundant places. [2023-11-19 08:07:49,409 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 544 flow [2023-11-19 08:07:49,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=544, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2023-11-19 08:07:49,410 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 36 predicate places. [2023-11-19 08:07:49,410 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 544 flow [2023-11-19 08:07:49,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 226.0) internal successors, (1356), 6 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:49,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:07:49,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:49,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 08:07:49,412 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 08:07:49,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:49,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1419611084, now seen corresponding path program 2 times [2023-11-19 08:07:49,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:49,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539313217] [2023-11-19 08:07:49,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:49,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:49,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 08:07:49,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:49,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539313217] [2023-11-19 08:07:49,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539313217] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:49,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:49,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:07:49,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433963111] [2023-11-19 08:07:49,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:49,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:07:49,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:49,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:07:49,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:07:49,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 548 [2023-11-19 08:07:49,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 544 flow. Second operand has 5 states, 5 states have (on average 248.2) internal successors, (1241), 5 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:49,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:07:49,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 548 [2023-11-19 08:07:49,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand