./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:00:31,236 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:00:31,313 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:00:31,321 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:00:31,322 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:00:31,357 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:00:31,358 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:00:31,359 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:00:31,360 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:00:31,360 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:00:31,361 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:00:31,362 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:00:31,362 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:00:31,363 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:00:31,364 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:00:31,365 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:00:31,365 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:00:31,366 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:00:31,367 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:00:31,367 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:00:31,368 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:00:31,369 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:00:31,369 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:00:31,370 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:00:31,370 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:00:31,371 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:00:31,372 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:00:31,372 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:00:31,373 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:00:31,373 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:00:31,374 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:00:31,374 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:00:31,375 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:00:31,375 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:00:31,376 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:00:31,376 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:00:31,376 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:00:31,377 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:00:31,377 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:00:31,377 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_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b [2023-11-06 23:00:31,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:00:31,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:00:31,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:00:31,710 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:00:31,713 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:00:31,714 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2023-11-06 23:00:35,062 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:00:35,296 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:00:35,297 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2023-11-06 23:00:35,307 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/data/5fc218407/3e00946728d849699ecee08d6222035c/FLAGe855d2928 [2023-11-06 23:00:35,333 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/data/5fc218407/3e00946728d849699ecee08d6222035c [2023-11-06 23:00:35,342 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:00:35,347 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:00:35,351 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:00:35,352 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:00:35,358 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:00:35,361 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:00:35" (1/1) ... [2023-11-06 23:00:35,363 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78445e07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:35, skipping insertion in model container [2023-11-06 23:00:35,363 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:00:35" (1/1) ... [2023-11-06 23:00:35,414 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:00:35,659 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_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3034,3047] [2023-11-06 23:00:35,671 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:00:35,683 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:00:35,713 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_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3034,3047] [2023-11-06 23:00:35,720 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:00:35,739 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:00:35,739 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:35 WrapperNode [2023-11-06 23:00:35,740 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:00:35,741 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:00:35,741 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:00:35,742 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:00:35,750 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:35" (1/1) ... [2023-11-06 23:00:35,762 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:35" (1/1) ... [2023-11-06 23:00:35,803 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 279 [2023-11-06 23:00:35,804 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:00:35,805 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:00:35,805 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:00:35,805 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:00:35,820 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:35" (1/1) ... [2023-11-06 23:00:35,820 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:35" (1/1) ... [2023-11-06 23:00:35,833 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:35" (1/1) ... [2023-11-06 23:00:35,848 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:35" (1/1) ... [2023-11-06 23:00:35,861 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:35" (1/1) ... [2023-11-06 23:00:35,874 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:35" (1/1) ... [2023-11-06 23:00:35,876 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:35" (1/1) ... [2023-11-06 23:00:35,879 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:35" (1/1) ... [2023-11-06 23:00:35,884 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:00:35,889 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:00:35,890 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:00:35,890 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:00:35,891 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:35" (1/1) ... [2023-11-06 23:00:35,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:00:35,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:35,946 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:00:35,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:00:36,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:00:36,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:00:36,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:00:36,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:00:36,002 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 23:00:36,003 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 23:00:36,003 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 23:00:36,003 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 23:00:36,003 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 23:00:36,003 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 23:00:36,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:00:36,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 23:00:36,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:00:36,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:00:36,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:00:36,010 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 23:00:36,206 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:00:36,209 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:00:36,860 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:00:36,878 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:00:36,879 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-06 23:00:36,882 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:00:36 BoogieIcfgContainer [2023-11-06 23:00:36,883 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:00:36,886 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:00:36,886 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:00:36,890 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:00:36,890 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:00:35" (1/3) ... [2023-11-06 23:00:36,891 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38d2128c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:00:36, skipping insertion in model container [2023-11-06 23:00:36,892 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:35" (2/3) ... [2023-11-06 23:00:36,892 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38d2128c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:00:36, skipping insertion in model container [2023-11-06 23:00:36,892 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:00:36" (3/3) ... [2023-11-06 23:00:36,894 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2023-11-06 23:00:36,903 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 23:00:36,929 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:00:36,930 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:00:36,930 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:00:37,084 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 23:00:37,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 343 places, 361 transitions, 743 flow [2023-11-06 23:00:37,314 INFO L124 PetriNetUnfolderBase]: 28/358 cut-off events. [2023-11-06 23:00:37,315 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:00:37,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 358 events. 28/358 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 573 event pairs, 0 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 277. Up to 2 conditions per place. [2023-11-06 23:00:37,326 INFO L82 GeneralOperation]: Start removeDead. Operand has 343 places, 361 transitions, 743 flow [2023-11-06 23:00:37,337 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 329 places, 347 transitions, 712 flow [2023-11-06 23:00:37,341 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:00:37,352 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 329 places, 347 transitions, 712 flow [2023-11-06 23:00:37,356 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 329 places, 347 transitions, 712 flow [2023-11-06 23:00:37,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 329 places, 347 transitions, 712 flow [2023-11-06 23:00:37,482 INFO L124 PetriNetUnfolderBase]: 28/347 cut-off events. [2023-11-06 23:00:37,483 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:00:37,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 347 events. 28/347 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 570 event pairs, 0 based on Foata normal form. 0/319 useless extension candidates. Maximal degree in co-relation 277. Up to 2 conditions per place. [2023-11-06 23:00:37,509 INFO L119 LiptonReduction]: Number of co-enabled transitions 20670 [2023-11-06 23:00:49,345 INFO L134 LiptonReduction]: Checked pairs total: 18500 [2023-11-06 23:00:49,346 INFO L136 LiptonReduction]: Total number of compositions: 394 [2023-11-06 23:00:49,362 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:00:49,370 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=LoopsAndPotentialCycles, 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;@6ba35134, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:00:49,370 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 23:00:49,378 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:00:49,379 INFO L124 PetriNetUnfolderBase]: 7/30 cut-off events. [2023-11-06 23:00:49,379 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:00:49,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:49,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:49,381 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:00:49,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:49,387 INFO L85 PathProgramCache]: Analyzing trace with hash 2123478737, now seen corresponding path program 1 times [2023-11-06 23:00:49,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:49,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639855544] [2023-11-06 23:00:49,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:49,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:49,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:50,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:50,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639855544] [2023-11-06 23:00:50,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639855544] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:50,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:50,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:00:50,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326241902] [2023-11-06 23:00:50,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:50,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:00:50,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:50,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:00:50,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:00:50,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 755 [2023-11-06 23:00:50,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 321.3333333333333) internal successors, (964), 3 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:50,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:50,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 755 [2023-11-06 23:00:50,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:50,461 INFO L124 PetriNetUnfolderBase]: 370/545 cut-off events. [2023-11-06 23:00:50,461 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2023-11-06 23:00:50,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1153 conditions, 545 events. 370/545 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1529 event pairs, 253 based on Foata normal form. 0/428 useless extension candidates. Maximal degree in co-relation 936. Up to 543 conditions per place. [2023-11-06 23:00:50,468 INFO L140 encePairwiseOnDemand]: 747/755 looper letters, 27 selfloop transitions, 6 changer transitions 0/33 dead transitions. [2023-11-06 23:00:50,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 150 flow [2023-11-06 23:00:50,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:00:50,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:00:50,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 979 transitions. [2023-11-06 23:00:50,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43222958057395144 [2023-11-06 23:00:50,501 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 979 transitions. [2023-11-06 23:00:50,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 979 transitions. [2023-11-06 23:00:50,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:50,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 979 transitions. [2023-11-06 23:00:50,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.3333333333333) internal successors, (979), 3 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:50,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 755.0) internal successors, (3020), 4 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:50,533 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 755.0) internal successors, (3020), 4 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:50,535 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 80 flow. Second operand 3 states and 979 transitions. [2023-11-06 23:00:50,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 33 transitions, 150 flow [2023-11-06 23:00:50,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 138 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 23:00:50,546 INFO L231 Difference]: Finished difference. Result has 31 places, 33 transitions, 98 flow [2023-11-06 23:00:50,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=755, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=31, PETRI_TRANSITIONS=33} [2023-11-06 23:00:50,554 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2023-11-06 23:00:50,554 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 33 transitions, 98 flow [2023-11-06 23:00:50,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 321.3333333333333) internal successors, (964), 3 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:50,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:50,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:50,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:00:50,557 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:00:50,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:50,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1670241295, now seen corresponding path program 1 times [2023-11-06 23:00:50,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:50,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360368515] [2023-11-06 23:00:50,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:50,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:50,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:50,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:00:50,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:50,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360368515] [2023-11-06 23:00:50,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360368515] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:50,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:50,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:00:50,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670825764] [2023-11-06 23:00:50,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:50,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:00:50,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:50,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:00:50,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:00:50,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 755 [2023-11-06 23:00:50,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 33 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 332.25) internal successors, (1329), 4 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:50,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:50,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 755 [2023-11-06 23:00:50,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:51,186 INFO L124 PetriNetUnfolderBase]: 566/826 cut-off events. [2023-11-06 23:00:51,186 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-06 23:00:51,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1690 conditions, 826 events. 566/826 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2694 event pairs, 253 based on Foata normal form. 1/634 useless extension candidates. Maximal degree in co-relation 1659. Up to 546 conditions per place. [2023-11-06 23:00:51,191 INFO L140 encePairwiseOnDemand]: 752/755 looper letters, 45 selfloop transitions, 2 changer transitions 2/49 dead transitions. [2023-11-06 23:00:51,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 49 transitions, 231 flow [2023-11-06 23:00:51,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:00:51,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:00:51,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1025 transitions. [2023-11-06 23:00:51,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45253863134657835 [2023-11-06 23:00:51,197 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1025 transitions. [2023-11-06 23:00:51,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1025 transitions. [2023-11-06 23:00:51,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:51,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1025 transitions. [2023-11-06 23:00:51,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 341.6666666666667) internal successors, (1025), 3 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:51,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 755.0) internal successors, (3020), 4 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:51,211 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 755.0) internal successors, (3020), 4 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:51,212 INFO L175 Difference]: Start difference. First operand has 31 places, 33 transitions, 98 flow. Second operand 3 states and 1025 transitions. [2023-11-06 23:00:51,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 49 transitions, 231 flow [2023-11-06 23:00:51,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 49 transitions, 225 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:00:51,214 INFO L231 Difference]: Finished difference. Result has 33 places, 34 transitions, 104 flow [2023-11-06 23:00:51,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=755, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=33, PETRI_TRANSITIONS=34} [2023-11-06 23:00:51,216 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -1 predicate places. [2023-11-06 23:00:51,216 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 34 transitions, 104 flow [2023-11-06 23:00:51,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 332.25) internal successors, (1329), 4 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:51,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:51,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:51,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:00:51,219 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:00:51,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:51,220 INFO L85 PathProgramCache]: Analyzing trace with hash 477279295, now seen corresponding path program 1 times [2023-11-06 23:00:51,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:51,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443085815] [2023-11-06 23:00:51,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:51,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:51,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:00:51,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:51,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443085815] [2023-11-06 23:00:51,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443085815] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:00:51,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19749576] [2023-11-06 23:00:51,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:51,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:51,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:51,400 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:51,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:00:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:51,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:00:51,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:00:51,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:51,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:00:51,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19749576] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:51,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:00:51,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-06 23:00:51,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483339359] [2023-11-06 23:00:51,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:51,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:00:51,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:51,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:00:51,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:00:51,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 755 [2023-11-06 23:00:51,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 34 transitions, 104 flow. Second operand has 8 states, 8 states have (on average 312.0) internal successors, (2496), 8 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:51,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:51,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 755 [2023-11-06 23:00:51,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:52,161 INFO L124 PetriNetUnfolderBase]: 566/835 cut-off events. [2023-11-06 23:00:52,161 INFO L125 PetriNetUnfolderBase]: For 142/142 co-relation queries the response was YES. [2023-11-06 23:00:52,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1884 conditions, 835 events. 566/835 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2584 event pairs, 413 based on Foata normal form. 0/724 useless extension candidates. Maximal degree in co-relation 1822. Up to 824 conditions per place. [2023-11-06 23:00:52,167 INFO L140 encePairwiseOnDemand]: 748/755 looper letters, 28 selfloop transitions, 15 changer transitions 0/43 dead transitions. [2023-11-06 23:00:52,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 43 transitions, 226 flow [2023-11-06 23:00:52,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:00:52,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:00:52,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1899 transitions. [2023-11-06 23:00:52,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.419205298013245 [2023-11-06 23:00:52,176 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1899 transitions. [2023-11-06 23:00:52,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1899 transitions. [2023-11-06 23:00:52,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:52,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1899 transitions. [2023-11-06 23:00:52,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 316.5) internal successors, (1899), 6 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:52,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 755.0) internal successors, (5285), 7 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:52,200 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 755.0) internal successors, (5285), 7 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:52,201 INFO L175 Difference]: Start difference. First operand has 33 places, 34 transitions, 104 flow. Second operand 6 states and 1899 transitions. [2023-11-06 23:00:52,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 43 transitions, 226 flow [2023-11-06 23:00:52,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 43 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:00:52,205 INFO L231 Difference]: Finished difference. Result has 40 places, 43 transitions, 198 flow [2023-11-06 23:00:52,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=755, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=40, PETRI_TRANSITIONS=43} [2023-11-06 23:00:52,206 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 6 predicate places. [2023-11-06 23:00:52,206 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 43 transitions, 198 flow [2023-11-06 23:00:52,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 312.0) internal successors, (2496), 8 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:52,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:52,209 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:52,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 23:00:52,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-06 23:00:52,417 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:00:52,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:52,417 INFO L85 PathProgramCache]: Analyzing trace with hash 588487359, now seen corresponding path program 2 times [2023-11-06 23:00:52,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:52,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247759558] [2023-11-06 23:00:52,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:52,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:52,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 23:00:52,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:52,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247759558] [2023-11-06 23:00:52,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247759558] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:00:52,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72354424] [2023-11-06 23:00:52,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:00:52,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:52,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:52,731 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:52,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:00:52,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 23:00:52,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:00:52,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:00:52,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:52,932 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-06 23:00:52,933 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:00:52,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72354424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:52,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:00:52,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-11-06 23:00:52,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025683023] [2023-11-06 23:00:52,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:52,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:00:52,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:52,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:00:52,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:00:52,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 327 out of 755 [2023-11-06 23:00:52,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 43 transitions, 198 flow. Second operand has 4 states, 4 states have (on average 333.5) internal successors, (1334), 4 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:52,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:52,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 327 of 755 [2023-11-06 23:00:52,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:53,402 INFO L124 PetriNetUnfolderBase]: 988/1460 cut-off events. [2023-11-06 23:00:53,402 INFO L125 PetriNetUnfolderBase]: For 185/185 co-relation queries the response was YES. [2023-11-06 23:00:53,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3243 conditions, 1460 events. 988/1460 cut-off events. For 185/185 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5683 event pairs, 413 based on Foata normal form. 22/1276 useless extension candidates. Maximal degree in co-relation 3154. Up to 836 conditions per place. [2023-11-06 23:00:53,414 INFO L140 encePairwiseOnDemand]: 751/755 looper letters, 72 selfloop transitions, 3 changer transitions 2/77 dead transitions. [2023-11-06 23:00:53,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 77 transitions, 441 flow [2023-11-06 23:00:53,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:00:53,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:00:53,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1371 transitions. [2023-11-06 23:00:53,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45397350993377483 [2023-11-06 23:00:53,420 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1371 transitions. [2023-11-06 23:00:53,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1371 transitions. [2023-11-06 23:00:53,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:53,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1371 transitions. [2023-11-06 23:00:53,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 342.75) internal successors, (1371), 4 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:53,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 755.0) internal successors, (3775), 5 states have internal predecessors, (3775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:53,437 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 755.0) internal successors, (3775), 5 states have internal predecessors, (3775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:53,438 INFO L175 Difference]: Start difference. First operand has 40 places, 43 transitions, 198 flow. Second operand 4 states and 1371 transitions. [2023-11-06 23:00:53,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 77 transitions, 441 flow [2023-11-06 23:00:53,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 77 transitions, 417 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-06 23:00:53,442 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 194 flow [2023-11-06 23:00:53,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=755, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=39, 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=194, PETRI_PLACES=44, PETRI_TRANSITIONS=45} [2023-11-06 23:00:53,444 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 10 predicate places. [2023-11-06 23:00:53,444 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 194 flow [2023-11-06 23:00:53,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 333.5) internal successors, (1334), 4 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:53,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:53,446 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:53,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:53,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:53,652 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:00:53,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:53,653 INFO L85 PathProgramCache]: Analyzing trace with hash 2127296679, now seen corresponding path program 3 times [2023-11-06 23:00:53,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:53,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688539404] [2023-11-06 23:00:53,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:53,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:53,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 23:00:53,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:53,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688539404] [2023-11-06 23:00:53,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688539404] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:00:53,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839356405] [2023-11-06 23:00:53,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:00:53,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:53,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:53,951 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:53,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:00:54,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-06 23:00:54,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:00:54,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:00:54,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-06 23:00:54,190 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:00:54,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839356405] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:54,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:00:54,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-11-06 23:00:54,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40492225] [2023-11-06 23:00:54,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:54,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:00:54,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:54,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:00:54,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:00:54,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 755 [2023-11-06 23:00:54,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 332.5) internal successors, (1330), 4 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:54,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:54,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 755 [2023-11-06 23:00:54,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:54,664 INFO L124 PetriNetUnfolderBase]: 1162/1706 cut-off events. [2023-11-06 23:00:54,665 INFO L125 PetriNetUnfolderBase]: For 748/748 co-relation queries the response was YES. [2023-11-06 23:00:54,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4272 conditions, 1706 events. 1162/1706 cut-off events. For 748/748 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7075 event pairs, 166 based on Foata normal form. 36/1612 useless extension candidates. Maximal degree in co-relation 4192. Up to 1187 conditions per place. [2023-11-06 23:00:54,680 INFO L140 encePairwiseOnDemand]: 749/755 looper letters, 66 selfloop transitions, 5 changer transitions 1/72 dead transitions. [2023-11-06 23:00:54,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 72 transitions, 424 flow [2023-11-06 23:00:54,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:00:54,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:00:54,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1358 transitions. [2023-11-06 23:00:54,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44966887417218543 [2023-11-06 23:00:54,687 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1358 transitions. [2023-11-06 23:00:54,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1358 transitions. [2023-11-06 23:00:54,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:54,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1358 transitions. [2023-11-06 23:00:54,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 339.5) internal successors, (1358), 4 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:54,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 755.0) internal successors, (3775), 5 states have internal predecessors, (3775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:54,704 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 755.0) internal successors, (3775), 5 states have internal predecessors, (3775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:54,705 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 194 flow. Second operand 4 states and 1358 transitions. [2023-11-06 23:00:54,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 72 transitions, 424 flow [2023-11-06 23:00:54,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 72 transitions, 419 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:00:54,710 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 223 flow [2023-11-06 23:00:54,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=755, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=223, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2023-11-06 23:00:54,714 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 14 predicate places. [2023-11-06 23:00:54,715 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 223 flow [2023-11-06 23:00:54,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 332.5) internal successors, (1330), 4 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:54,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:54,716 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:54,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:54,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:54,923 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:00:54,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:54,924 INFO L85 PathProgramCache]: Analyzing trace with hash -2011794955, now seen corresponding path program 4 times [2023-11-06 23:00:54,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:54,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238379467] [2023-11-06 23:00:54,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:54,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 23:00:55,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:55,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238379467] [2023-11-06 23:00:55,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238379467] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:00:55,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118551653] [2023-11-06 23:00:55,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:00:55,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:55,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:55,292 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:55,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:00:55,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:00:55,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:00:55,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:00:55,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:55,621 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 23:00:55,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 23:00:55,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118551653] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:55,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:00:55,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-11-06 23:00:55,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012718243] [2023-11-06 23:00:55,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:55,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 23:00:55,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:55,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 23:00:55,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-11-06 23:00:56,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 755 [2023-11-06 23:00:56,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 223 flow. Second operand has 17 states, 17 states have (on average 310.6470588235294) internal successors, (5281), 17 states have internal predecessors, (5281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:56,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:56,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 755 [2023-11-06 23:00:56,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:56,615 INFO L124 PetriNetUnfolderBase]: 1162/1709 cut-off events. [2023-11-06 23:00:56,615 INFO L125 PetriNetUnfolderBase]: For 1653/1653 co-relation queries the response was YES. [2023-11-06 23:00:56,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4543 conditions, 1709 events. 1162/1709 cut-off events. For 1653/1653 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6429 event pairs, 857 based on Foata normal form. 1/1580 useless extension candidates. Maximal degree in co-relation 4448. Up to 1695 conditions per place. [2023-11-06 23:00:56,628 INFO L140 encePairwiseOnDemand]: 748/755 looper letters, 32 selfloop transitions, 18 changer transitions 0/50 dead transitions. [2023-11-06 23:00:56,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 50 transitions, 341 flow [2023-11-06 23:00:56,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:00:56,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 23:00:56,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2204 transitions. [2023-11-06 23:00:56,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170293282876064 [2023-11-06 23:00:56,640 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2204 transitions. [2023-11-06 23:00:56,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2204 transitions. [2023-11-06 23:00:56,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:56,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2204 transitions. [2023-11-06 23:00:56,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 314.85714285714283) internal successors, (2204), 7 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:56,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 755.0) internal successors, (6040), 8 states have internal predecessors, (6040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:56,665 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 755.0) internal successors, (6040), 8 states have internal predecessors, (6040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:56,666 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 223 flow. Second operand 7 states and 2204 transitions. [2023-11-06 23:00:56,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 50 transitions, 341 flow [2023-11-06 23:00:56,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 50 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:00:56,673 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 288 flow [2023-11-06 23:00:56,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=755, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=288, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2023-11-06 23:00:56,676 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 20 predicate places. [2023-11-06 23:00:56,676 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 288 flow [2023-11-06 23:00:56,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 310.6470588235294) internal successors, (5281), 17 states have internal predecessors, (5281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:56,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:56,697 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:56,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:56,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:56,904 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:00:56,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:56,904 INFO L85 PathProgramCache]: Analyzing trace with hash 2006083529, now seen corresponding path program 5 times [2023-11-06 23:00:56,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:56,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79142529] [2023-11-06 23:00:56,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:56,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:00:57,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:57,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79142529] [2023-11-06 23:00:57,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79142529] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:57,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:57,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:00:57,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047837790] [2023-11-06 23:00:57,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:57,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:00:57,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:57,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:00:57,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:00:57,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 755 [2023-11-06 23:00:57,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 288 flow. Second operand has 5 states, 5 states have (on average 329.2) internal successors, (1646), 5 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:57,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:57,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 755 [2023-11-06 23:00:57,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:58,303 INFO L124 PetriNetUnfolderBase]: 2129/3140 cut-off events. [2023-11-06 23:00:58,303 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-11-06 23:00:58,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8189 conditions, 3140 events. 2129/3140 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 14410 event pairs, 879 based on Foata normal form. 26/2910 useless extension candidates. Maximal degree in co-relation 8074. Up to 1756 conditions per place. [2023-11-06 23:00:58,329 INFO L140 encePairwiseOnDemand]: 750/755 looper letters, 83 selfloop transitions, 3 changer transitions 17/103 dead transitions. [2023-11-06 23:00:58,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 103 transitions, 701 flow [2023-11-06 23:00:58,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:00:58,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:00:58,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1693 transitions. [2023-11-06 23:00:58,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44847682119205295 [2023-11-06 23:00:58,337 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1693 transitions. [2023-11-06 23:00:58,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1693 transitions. [2023-11-06 23:00:58,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:58,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1693 transitions. [2023-11-06 23:00:58,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 338.6) internal successors, (1693), 5 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:58,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 755.0) internal successors, (4530), 6 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:58,352 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 755.0) internal successors, (4530), 6 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:58,353 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 288 flow. Second operand 5 states and 1693 transitions. [2023-11-06 23:00:58,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 103 transitions, 701 flow [2023-11-06 23:00:58,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 103 transitions, 665 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-06 23:00:58,360 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 274 flow [2023-11-06 23:00:58,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=755, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=274, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2023-11-06 23:00:58,361 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 23 predicate places. [2023-11-06 23:00:58,362 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 274 flow [2023-11-06 23:00:58,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 329.2) internal successors, (1646), 5 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:58,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:58,363 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:58,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 23:00:58,363 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:00:58,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:58,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1229466061, now seen corresponding path program 6 times [2023-11-06 23:00:58,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:58,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117103959] [2023-11-06 23:00:58,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:58,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:58,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-06 23:00:58,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:58,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117103959] [2023-11-06 23:00:58,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117103959] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:58,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:58,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:00:58,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155211847] [2023-11-06 23:00:58,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:58,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:00:58,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:58,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:00:58,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:00:58,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 755 [2023-11-06 23:00:58,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 274 flow. Second operand has 4 states, 4 states have (on average 331.5) internal successors, (1326), 4 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:58,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:58,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 755 [2023-11-06 23:00:58,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:59,313 INFO L124 PetriNetUnfolderBase]: 1751/2550 cut-off events. [2023-11-06 23:00:59,313 INFO L125 PetriNetUnfolderBase]: For 3448/3448 co-relation queries the response was YES. [2023-11-06 23:00:59,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7573 conditions, 2550 events. 1751/2550 cut-off events. For 3448/3448 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10941 event pairs, 679 based on Foata normal form. 72/2622 useless extension candidates. Maximal degree in co-relation 7472. Up to 1504 conditions per place. [2023-11-06 23:00:59,339 INFO L140 encePairwiseOnDemand]: 750/755 looper letters, 77 selfloop transitions, 6 changer transitions 3/86 dead transitions. [2023-11-06 23:00:59,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 86 transitions, 575 flow [2023-11-06 23:00:59,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:00:59,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:00:59,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1361 transitions. [2023-11-06 23:00:59,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4506622516556291 [2023-11-06 23:00:59,345 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1361 transitions. [2023-11-06 23:00:59,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1361 transitions. [2023-11-06 23:00:59,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:59,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1361 transitions. [2023-11-06 23:00:59,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 340.25) internal successors, (1361), 4 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:59,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 755.0) internal successors, (3775), 5 states have internal predecessors, (3775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:59,358 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 755.0) internal successors, (3775), 5 states have internal predecessors, (3775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:59,359 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 274 flow. Second operand 4 states and 1361 transitions. [2023-11-06 23:00:59,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 86 transitions, 575 flow [2023-11-06 23:00:59,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 86 transitions, 563 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-06 23:00:59,367 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 292 flow [2023-11-06 23:00:59,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=755, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=292, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2023-11-06 23:00:59,371 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 24 predicate places. [2023-11-06 23:00:59,371 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 292 flow [2023-11-06 23:00:59,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 331.5) internal successors, (1326), 4 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:59,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:59,372 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:59,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 23:00:59,373 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:00:59,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:59,373 INFO L85 PathProgramCache]: Analyzing trace with hash -989738674, now seen corresponding path program 1 times [2023-11-06 23:00:59,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:59,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519935208] [2023-11-06 23:00:59,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:59,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:59,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:59,749 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:00:59,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:59,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519935208] [2023-11-06 23:00:59,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519935208] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:59,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:59,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:00:59,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588764473] [2023-11-06 23:00:59,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:59,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:00:59,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:59,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:00:59,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:00:59,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 755 [2023-11-06 23:00:59,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 292 flow. Second operand has 5 states, 5 states have (on average 328.6) internal successors, (1643), 5 states have internal predecessors, (1643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:59,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:59,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 755 [2023-11-06 23:00:59,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:00,548 INFO L124 PetriNetUnfolderBase]: 1970/2858 cut-off events. [2023-11-06 23:01:00,548 INFO L125 PetriNetUnfolderBase]: For 4543/4543 co-relation queries the response was YES. [2023-11-06 23:01:00,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8909 conditions, 2858 events. 1970/2858 cut-off events. For 4543/4543 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 12639 event pairs, 699 based on Foata normal form. 20/2878 useless extension candidates. Maximal degree in co-relation 8808. Up to 1481 conditions per place. [2023-11-06 23:01:00,575 INFO L140 encePairwiseOnDemand]: 750/755 looper letters, 81 selfloop transitions, 6 changer transitions 16/103 dead transitions. [2023-11-06 23:01:00,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 103 transitions, 720 flow [2023-11-06 23:01:00,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:01:00,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:01:00,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1688 transitions. [2023-11-06 23:01:00,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4471523178807947 [2023-11-06 23:01:00,583 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1688 transitions. [2023-11-06 23:01:00,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1688 transitions. [2023-11-06 23:01:00,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:00,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1688 transitions. [2023-11-06 23:01:00,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 337.6) internal successors, (1688), 5 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:00,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 755.0) internal successors, (4530), 6 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:00,598 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 755.0) internal successors, (4530), 6 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:00,598 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 292 flow. Second operand 5 states and 1688 transitions. [2023-11-06 23:01:00,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 103 transitions, 720 flow [2023-11-06 23:01:00,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 103 transitions, 690 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-06 23:01:00,607 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 322 flow [2023-11-06 23:01:00,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=755, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=322, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2023-11-06 23:01:00,609 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 27 predicate places. [2023-11-06 23:01:00,609 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 322 flow [2023-11-06 23:01:00,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 328.6) internal successors, (1643), 5 states have internal predecessors, (1643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:00,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:00,610 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:00,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 23:01:00,610 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:01:00,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:00,611 INFO L85 PathProgramCache]: Analyzing trace with hash 2099147840, now seen corresponding path program 2 times [2023-11-06 23:01:00,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:00,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256472976] [2023-11-06 23:01:00,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:00,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:00,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-06 23:01:00,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:00,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256472976] [2023-11-06 23:01:00,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256472976] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:01:00,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795838528] [2023-11-06 23:01:00,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:01:00,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:00,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:00,950 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:00,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:01:01,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:01:01,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:01:01,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:01:01,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-06 23:01:01,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:01:01,345 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-06 23:01:01,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795838528] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:01:01,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:01:01,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2023-11-06 23:01:01,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429929418] [2023-11-06 23:01:01,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:01,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:01:01,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:01,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:01:01,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:01:01,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 755 [2023-11-06 23:01:01,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 322 flow. Second operand has 5 states, 5 states have (on average 327.6) internal successors, (1638), 5 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:01,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:01,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 755 [2023-11-06 23:01:01,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:02,146 INFO L124 PetriNetUnfolderBase]: 1986/2869 cut-off events. [2023-11-06 23:01:02,146 INFO L125 PetriNetUnfolderBase]: For 5158/5158 co-relation queries the response was YES. [2023-11-06 23:01:02,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9455 conditions, 2869 events. 1986/2869 cut-off events. For 5158/5158 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 12229 event pairs, 267 based on Foata normal form. 36/2905 useless extension candidates. Maximal degree in co-relation 9352. Up to 713 conditions per place. [2023-11-06 23:01:02,181 INFO L140 encePairwiseOnDemand]: 747/755 looper letters, 112 selfloop transitions, 22 changer transitions 4/138 dead transitions. [2023-11-06 23:01:02,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 138 transitions, 1007 flow [2023-11-06 23:01:02,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:01:02,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 23:01:02,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2343 transitions. [2023-11-06 23:01:02,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44333017975402084 [2023-11-06 23:01:02,192 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2343 transitions. [2023-11-06 23:01:02,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2343 transitions. [2023-11-06 23:01:02,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:02,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2343 transitions. [2023-11-06 23:01:02,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 334.7142857142857) internal successors, (2343), 7 states have internal predecessors, (2343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:02,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 755.0) internal successors, (6040), 8 states have internal predecessors, (6040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:02,212 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 755.0) internal successors, (6040), 8 states have internal predecessors, (6040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:02,212 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 322 flow. Second operand 7 states and 2343 transitions. [2023-11-06 23:01:02,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 138 transitions, 1007 flow [2023-11-06 23:01:02,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 138 transitions, 989 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-06 23:01:02,235 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 459 flow [2023-11-06 23:01:02,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=755, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=459, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2023-11-06 23:01:02,237 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 32 predicate places. [2023-11-06 23:01:02,237 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 459 flow [2023-11-06 23:01:02,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 327.6) internal successors, (1638), 5 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:02,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:02,238 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:02,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:02,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 23:01:02,444 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:01:02,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:02,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1849583484, now seen corresponding path program 3 times [2023-11-06 23:01:02,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:02,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313483402] [2023-11-06 23:01:02,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:02,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:02,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:02,841 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:01:02,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:02,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313483402] [2023-11-06 23:01:02,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313483402] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:01:02,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324644963] [2023-11-06 23:01:02,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:01:02,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:02,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:02,845 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:02,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:01:03,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 23:01:03,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:01:03,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:01:03,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:03,201 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:01:03,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:01:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:01:03,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324644963] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:01:03,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:01:03,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2023-11-06 23:01:03,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458197872] [2023-11-06 23:01:03,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:03,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:01:03,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:03,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:01:03,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:01:03,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 755 [2023-11-06 23:01:03,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 459 flow. Second operand has 5 states, 5 states have (on average 327.6) internal successors, (1638), 5 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:03,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:03,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 755 [2023-11-06 23:01:03,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:04,157 INFO L124 PetriNetUnfolderBase]: 2074/2993 cut-off events. [2023-11-06 23:01:04,158 INFO L125 PetriNetUnfolderBase]: For 6742/6742 co-relation queries the response was YES. [2023-11-06 23:01:04,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10675 conditions, 2993 events. 2074/2993 cut-off events. For 6742/6742 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 12908 event pairs, 473 based on Foata normal form. 36/3029 useless extension candidates. Maximal degree in co-relation 10570. Up to 1123 conditions per place. [2023-11-06 23:01:04,188 INFO L140 encePairwiseOnDemand]: 749/755 looper letters, 96 selfloop transitions, 21 changer transitions 1/118 dead transitions. [2023-11-06 23:01:04,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 118 transitions, 905 flow [2023-11-06 23:01:04,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:01:04,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:01:04,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1682 transitions. [2023-11-06 23:01:04,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44556291390728475 [2023-11-06 23:01:04,195 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1682 transitions. [2023-11-06 23:01:04,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1682 transitions. [2023-11-06 23:01:04,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:04,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1682 transitions. [2023-11-06 23:01:04,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 336.4) internal successors, (1682), 5 states have internal predecessors, (1682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:04,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 755.0) internal successors, (4530), 6 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:04,210 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 755.0) internal successors, (4530), 6 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:04,211 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 459 flow. Second operand 5 states and 1682 transitions. [2023-11-06 23:01:04,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 118 transitions, 905 flow [2023-11-06 23:01:04,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 118 transitions, 894 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 23:01:04,253 INFO L231 Difference]: Finished difference. Result has 70 places, 74 transitions, 535 flow [2023-11-06 23:01:04,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=755, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=535, PETRI_PLACES=70, PETRI_TRANSITIONS=74} [2023-11-06 23:01:04,254 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 36 predicate places. [2023-11-06 23:01:04,254 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 74 transitions, 535 flow [2023-11-06 23:01:04,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 327.6) internal successors, (1638), 5 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:04,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:04,255 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:04,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:04,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 23:01:04,462 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:01:04,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:04,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1337095936, now seen corresponding path program 4 times [2023-11-06 23:01:04,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:04,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418961396] [2023-11-06 23:01:04,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:04,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:04,772 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-06 23:01:04,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:04,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418961396] [2023-11-06 23:01:04,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418961396] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:04,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:04,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:01:04,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655056232] [2023-11-06 23:01:04,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:04,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:01:04,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:04,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:01:04,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:01:04,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 755 [2023-11-06 23:01:04,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 74 transitions, 535 flow. Second operand has 5 states, 5 states have (on average 328.6) internal successors, (1643), 5 states have internal predecessors, (1643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:04,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:04,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 755 [2023-11-06 23:01:04,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:05,597 INFO L124 PetriNetUnfolderBase]: 2054/2973 cut-off events. [2023-11-06 23:01:05,597 INFO L125 PetriNetUnfolderBase]: For 8967/8967 co-relation queries the response was YES. [2023-11-06 23:01:05,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11493 conditions, 2973 events. 2054/2973 cut-off events. For 8967/8967 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 12690 event pairs, 759 based on Foata normal form. 20/2993 useless extension candidates. Maximal degree in co-relation 11386. Up to 1924 conditions per place. [2023-11-06 23:01:05,626 INFO L140 encePairwiseOnDemand]: 750/755 looper letters, 89 selfloop transitions, 13 changer transitions 18/120 dead transitions. [2023-11-06 23:01:05,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 120 transitions, 1006 flow [2023-11-06 23:01:05,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:01:05,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:01:05,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1685 transitions. [2023-11-06 23:01:05,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4463576158940397 [2023-11-06 23:01:05,634 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1685 transitions. [2023-11-06 23:01:05,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1685 transitions. [2023-11-06 23:01:05,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:05,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1685 transitions. [2023-11-06 23:01:05,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 337.0) internal successors, (1685), 5 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:05,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 755.0) internal successors, (4530), 6 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:05,651 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 755.0) internal successors, (4530), 6 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:05,652 INFO L175 Difference]: Start difference. First operand has 70 places, 74 transitions, 535 flow. Second operand 5 states and 1685 transitions. [2023-11-06 23:01:05,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 120 transitions, 1006 flow [2023-11-06 23:01:05,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 120 transitions, 1006 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 23:01:05,697 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 628 flow [2023-11-06 23:01:05,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=755, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=628, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2023-11-06 23:01:05,699 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 42 predicate places. [2023-11-06 23:01:05,699 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 628 flow [2023-11-06 23:01:05,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 328.6) internal successors, (1643), 5 states have internal predecessors, (1643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:05,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:05,700 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:05,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 23:01:05,701 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:01:05,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:05,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1811242572, now seen corresponding path program 5 times [2023-11-06 23:01:05,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:05,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386592208] [2023-11-06 23:01:05,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:05,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:05,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:06,043 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-06 23:01:06,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:06,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386592208] [2023-11-06 23:01:06,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386592208] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:06,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:06,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:01:06,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386861656] [2023-11-06 23:01:06,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:06,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:01:06,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:06,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:01:06,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:01:06,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 755 [2023-11-06 23:01:06,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 78 transitions, 628 flow. Second operand has 5 states, 5 states have (on average 327.6) internal successors, (1638), 5 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:06,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:06,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 755 [2023-11-06 23:01:06,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:06,876 INFO L124 PetriNetUnfolderBase]: 1978/2850 cut-off events. [2023-11-06 23:01:06,877 INFO L125 PetriNetUnfolderBase]: For 10879/10879 co-relation queries the response was YES. [2023-11-06 23:01:06,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11625 conditions, 2850 events. 1978/2850 cut-off events. For 10879/10879 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 12022 event pairs, 655 based on Foata normal form. 36/2886 useless extension candidates. Maximal degree in co-relation 11515. Up to 1666 conditions per place. [2023-11-06 23:01:06,906 INFO L140 encePairwiseOnDemand]: 749/755 looper letters, 109 selfloop transitions, 15 changer transitions 5/129 dead transitions. [2023-11-06 23:01:06,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 129 transitions, 1118 flow [2023-11-06 23:01:06,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:01:06,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:01:06,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2010 transitions. [2023-11-06 23:01:06,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44370860927152317 [2023-11-06 23:01:06,915 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2010 transitions. [2023-11-06 23:01:06,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2010 transitions. [2023-11-06 23:01:06,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:06,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2010 transitions. [2023-11-06 23:01:06,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 335.0) internal successors, (2010), 6 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) [2023-11-06 23:01:06,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 755.0) internal successors, (5285), 7 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:06,932 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 755.0) internal successors, (5285), 7 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:06,932 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 628 flow. Second operand 6 states and 2010 transitions. [2023-11-06 23:01:06,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 129 transitions, 1118 flow [2023-11-06 23:01:06,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 129 transitions, 1100 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-06 23:01:06,997 INFO L231 Difference]: Finished difference. Result has 80 places, 78 transitions, 644 flow [2023-11-06 23:01:06,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=755, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=644, PETRI_PLACES=80, PETRI_TRANSITIONS=78} [2023-11-06 23:01:06,998 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 46 predicate places. [2023-11-06 23:01:06,998 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 78 transitions, 644 flow [2023-11-06 23:01:06,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 327.6) internal successors, (1638), 5 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:06,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:06,999 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:07,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 23:01:07,000 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:01:07,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:07,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1840460712, now seen corresponding path program 1 times [2023-11-06 23:01:07,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:07,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648314902] [2023-11-06 23:01:07,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:07,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:01:08,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:08,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648314902] [2023-11-06 23:01:08,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648314902] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:01:08,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159773539] [2023-11-06 23:01:08,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:08,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:08,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:08,995 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:09,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:01:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:09,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-06 23:01:09,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:09,272 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 510 treesize of output 494 [2023-11-06 23:01:09,588 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 23:01:10,032 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:01:10,033 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-06 23:01:10,177 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:01:10,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:01:10,769 WARN L839 $PredicateComparison]: unable to prove that (forall ((~o_4~0.base Int) (v_ArrVal_874 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_874))) (let ((.cse0 (select .cse1 ~o_4~0.base)) (.cse2 (select .cse1 ~o_2~0.base))) (or (< (select .cse0 c_~o_4~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset)) (let ((.cse3 (* |c_thread2Thread1of1ForFork1_~i~1#1| 4))) (< (select .cse2 (+ c_~o_2~0.offset .cse3)) (+ (select .cse0 (+ c_~o_4~0.offset .cse3)) 1))) (< |c_thread1Thread1of1ForFork0_#t~mem1#1| (+ (select .cse2 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) 1)))))) is different from false [2023-11-06 23:01:10,794 WARN L839 $PredicateComparison]: unable to prove that (forall ((~o_4~0.base Int) (v_ArrVal_874 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_874))) (let ((.cse1 (select (select .cse2 ~o_4~0.base) c_~o_4~0.offset)) (.cse0 (select .cse2 ~o_2~0.base))) (or (< (select .cse0 c_~o_2~0.offset) (+ .cse1 1)) (< .cse1 (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset)) (< |c_thread1Thread1of1ForFork0_#t~mem1#1| (+ (select .cse0 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) 1)))))) is different from false [2023-11-06 23:01:10,962 INFO L322 Elim1Store]: treesize reduction 19, result has 84.3 percent of original size [2023-11-06 23:01:10,962 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 188 treesize of output 233 [2023-11-06 23:01:11,044 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:01:11,044 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 120 treesize of output 154 [2023-11-06 23:01:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:01:23,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159773539] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:01:23,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:01:23,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 12] total 38 [2023-11-06 23:01:23,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030741470] [2023-11-06 23:01:23,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:01:23,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-06 23:01:23,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:23,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-06 23:01:23,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1254, Unknown=2, NotChecked=146, Total=1560 [2023-11-06 23:01:23,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 755 [2023-11-06 23:01:23,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 78 transitions, 644 flow. Second operand has 40 states, 40 states have (on average 258.975) internal successors, (10359), 40 states have internal predecessors, (10359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:23,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:23,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 755 [2023-11-06 23:01:23,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:28,998 INFO L124 PetriNetUnfolderBase]: 4990/7225 cut-off events. [2023-11-06 23:01:28,998 INFO L125 PetriNetUnfolderBase]: For 25233/25233 co-relation queries the response was YES. [2023-11-06 23:01:29,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28935 conditions, 7225 events. 4990/7225 cut-off events. For 25233/25233 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 37100 event pairs, 487 based on Foata normal form. 3/7228 useless extension candidates. Maximal degree in co-relation 28824. Up to 2378 conditions per place. [2023-11-06 23:01:29,100 INFO L140 encePairwiseOnDemand]: 738/755 looper letters, 322 selfloop transitions, 167 changer transitions 21/510 dead transitions. [2023-11-06 23:01:29,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 510 transitions, 4698 flow [2023-11-06 23:01:29,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 23:01:29,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-06 23:01:29,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 8558 transitions. [2023-11-06 23:01:29,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35422185430463576 [2023-11-06 23:01:29,147 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 8558 transitions. [2023-11-06 23:01:29,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 8558 transitions. [2023-11-06 23:01:29,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:29,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 8558 transitions. [2023-11-06 23:01:29,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 267.4375) internal successors, (8558), 32 states have internal predecessors, (8558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:29,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 755.0) internal successors, (24915), 33 states have internal predecessors, (24915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:29,248 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 755.0) internal successors, (24915), 33 states have internal predecessors, (24915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:29,248 INFO L175 Difference]: Start difference. First operand has 80 places, 78 transitions, 644 flow. Second operand 32 states and 8558 transitions. [2023-11-06 23:01:29,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 510 transitions, 4698 flow [2023-11-06 23:01:29,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 510 transitions, 4194 flow, removed 5 selfloop flow, removed 8 redundant places. [2023-11-06 23:01:29,493 INFO L231 Difference]: Finished difference. Result has 119 places, 260 transitions, 2887 flow [2023-11-06 23:01:29,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=755, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2887, PETRI_PLACES=119, PETRI_TRANSITIONS=260} [2023-11-06 23:01:29,494 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 85 predicate places. [2023-11-06 23:01:29,494 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 260 transitions, 2887 flow [2023-11-06 23:01:29,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 258.975) internal successors, (10359), 40 states have internal predecessors, (10359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:29,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:29,498 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:29,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:29,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 23:01:29,709 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:01:29,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:29,710 INFO L85 PathProgramCache]: Analyzing trace with hash 384093456, now seen corresponding path program 2 times [2023-11-06 23:01:29,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:29,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962156] [2023-11-06 23:01:29,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:29,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:01:31,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:31,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962156] [2023-11-06 23:01:31,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962156] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:01:31,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415085465] [2023-11-06 23:01:31,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:01:31,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:31,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:31,212 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:31,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:01:31,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:01:31,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:01:31,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 23:01:31,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:32,192 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:01:32,193 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 80 treesize of output 120 [2023-11-06 23:01:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:01:32,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:01:33,171 INFO L322 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-11-06 23:01:33,171 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-11-06 23:01:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:01:33,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415085465] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:01:33,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:01:33,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 34 [2023-11-06 23:01:33,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174210965] [2023-11-06 23:01:33,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:01:33,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 23:01:33,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:33,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 23:01:33,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 23:01:37,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 755 [2023-11-06 23:01:37,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 260 transitions, 2887 flow. Second operand has 35 states, 35 states have (on average 290.1714285714286) internal successors, (10156), 35 states have internal predecessors, (10156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:37,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:37,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 755 [2023-11-06 23:01:37,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:44,097 INFO L124 PetriNetUnfolderBase]: 9152/13277 cut-off events. [2023-11-06 23:01:44,097 INFO L125 PetriNetUnfolderBase]: For 69270/69270 co-relation queries the response was YES. [2023-11-06 23:01:44,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64473 conditions, 13277 events. 9152/13277 cut-off events. For 69270/69270 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 76518 event pairs, 1273 based on Foata normal form. 1/13278 useless extension candidates. Maximal degree in co-relation 64346. Up to 4826 conditions per place. [2023-11-06 23:01:44,291 INFO L140 encePairwiseOnDemand]: 740/755 looper letters, 376 selfloop transitions, 228 changer transitions 11/615 dead transitions. [2023-11-06 23:01:44,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 615 transitions, 7360 flow [2023-11-06 23:01:44,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 23:01:44,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 23:01:44,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6274 transitions. [2023-11-06 23:01:44,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3957111321349732 [2023-11-06 23:01:44,312 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6274 transitions. [2023-11-06 23:01:44,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6274 transitions. [2023-11-06 23:01:44,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:44,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6274 transitions. [2023-11-06 23:01:44,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 298.76190476190476) internal successors, (6274), 21 states have internal predecessors, (6274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:44,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 755.0) internal successors, (16610), 22 states have internal predecessors, (16610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:44,357 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 755.0) internal successors, (16610), 22 states have internal predecessors, (16610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:44,357 INFO L175 Difference]: Start difference. First operand has 119 places, 260 transitions, 2887 flow. Second operand 21 states and 6274 transitions. [2023-11-06 23:01:44,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 615 transitions, 7360 flow [2023-11-06 23:01:44,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 615 transitions, 7175 flow, removed 91 selfloop flow, removed 2 redundant places. [2023-11-06 23:01:44,930 INFO L231 Difference]: Finished difference. Result has 143 places, 379 transitions, 4762 flow [2023-11-06 23:01:44,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=755, PETRI_DIFFERENCE_MINUEND_FLOW=2774, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4762, PETRI_PLACES=143, PETRI_TRANSITIONS=379} [2023-11-06 23:01:44,931 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 109 predicate places. [2023-11-06 23:01:44,932 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 379 transitions, 4762 flow [2023-11-06 23:01:44,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 290.1714285714286) internal successors, (10156), 35 states have internal predecessors, (10156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:44,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:44,933 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:44,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:45,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 23:01:45,134 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:01:45,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:45,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2074913500, now seen corresponding path program 3 times [2023-11-06 23:01:45,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:45,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132498280] [2023-11-06 23:01:45,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:45,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:01:47,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:47,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132498280] [2023-11-06 23:01:47,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132498280] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:01:47,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879500415] [2023-11-06 23:01:47,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:01:47,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:47,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:47,069 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:47,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:01:47,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 23:01:47,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:01:47,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 23:01:47,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:48,206 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:01:48,207 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 113 [2023-11-06 23:01:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:01:48,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:01:49,145 INFO L322 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-11-06 23:01:49,145 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-11-06 23:01:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:01:49,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879500415] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:01:49,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:01:49,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 35 [2023-11-06 23:01:49,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889651533] [2023-11-06 23:01:49,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:01:49,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-06 23:01:49,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:49,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-06 23:01:49,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2023-11-06 23:01:53,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 755 [2023-11-06 23:01:53,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 379 transitions, 4762 flow. Second operand has 36 states, 36 states have (on average 290.1111111111111) internal successors, (10444), 36 states have internal predecessors, (10444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:53,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:53,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 755 [2023-11-06 23:01:53,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:59,467 INFO L124 PetriNetUnfolderBase]: 11037/16030 cut-off events. [2023-11-06 23:01:59,467 INFO L125 PetriNetUnfolderBase]: For 106895/106895 co-relation queries the response was YES. [2023-11-06 23:01:59,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82896 conditions, 16030 events. 11037/16030 cut-off events. For 106895/106895 co-relation queries the response was YES. Maximal size of possible extension queue 853. Compared 95514 event pairs, 1908 based on Foata normal form. 2/16032 useless extension candidates. Maximal degree in co-relation 82763. Up to 10175 conditions per place. [2023-11-06 23:01:59,644 INFO L140 encePairwiseOnDemand]: 738/755 looper letters, 330 selfloop transitions, 385 changer transitions 125/840 dead transitions. [2023-11-06 23:01:59,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 840 transitions, 11009 flow [2023-11-06 23:01:59,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 23:01:59,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 23:01:59,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 9196 transitions. [2023-11-06 23:01:59,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3929074983977783 [2023-11-06 23:01:59,663 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 9196 transitions. [2023-11-06 23:01:59,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 9196 transitions. [2023-11-06 23:01:59,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:59,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 9196 transitions. [2023-11-06 23:01:59,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 296.64516129032256) internal successors, (9196), 31 states have internal predecessors, (9196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:59,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 755.0) internal successors, (24160), 32 states have internal predecessors, (24160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:59,707 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 755.0) internal successors, (24160), 32 states have internal predecessors, (24160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:59,707 INFO L175 Difference]: Start difference. First operand has 143 places, 379 transitions, 4762 flow. Second operand 31 states and 9196 transitions. [2023-11-06 23:01:59,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 840 transitions, 11009 flow [2023-11-06 23:02:00,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 840 transitions, 10886 flow, removed 55 selfloop flow, removed 5 redundant places. [2023-11-06 23:02:00,751 INFO L231 Difference]: Finished difference. Result has 188 places, 567 transitions, 8343 flow [2023-11-06 23:02:00,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=755, PETRI_DIFFERENCE_MINUEND_FLOW=4663, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=8343, PETRI_PLACES=188, PETRI_TRANSITIONS=567} [2023-11-06 23:02:00,752 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 154 predicate places. [2023-11-06 23:02:00,752 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 567 transitions, 8343 flow [2023-11-06 23:02:00,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 290.1111111111111) internal successors, (10444), 36 states have internal predecessors, (10444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:00,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:00,753 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:00,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-06 23:02:00,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 23:02:00,960 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:02:00,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:00,960 INFO L85 PathProgramCache]: Analyzing trace with hash 2006451740, now seen corresponding path program 4 times [2023-11-06 23:02:00,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:00,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381170750] [2023-11-06 23:02:00,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:00,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:01,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:02:02,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:02,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381170750] [2023-11-06 23:02:02,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381170750] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:02,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757858812] [2023-11-06 23:02:02,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:02:02,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:02,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:02,406 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:02,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:02:02,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:02:02,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:02:02,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-06 23:02:02,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:03,095 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:02:03,096 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-06 23:02:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:02:03,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:03,875 INFO L322 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-11-06 23:02:03,875 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-11-06 23:02:04,042 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:02:04,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757858812] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:02:04,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:02:04,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 32 [2023-11-06 23:02:04,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851450549] [2023-11-06 23:02:04,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:04,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-06 23:02:04,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:04,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-06 23:02:04,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 23:02:07,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 755 [2023-11-06 23:02:07,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 567 transitions, 8343 flow. Second operand has 33 states, 33 states have (on average 290.24242424242425) internal successors, (9578), 33 states have internal predecessors, (9578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:07,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:07,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 755 [2023-11-06 23:02:07,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:14,119 INFO L124 PetriNetUnfolderBase]: 9769/14304 cut-off events. [2023-11-06 23:02:14,119 INFO L125 PetriNetUnfolderBase]: For 225006/225006 co-relation queries the response was YES. [2023-11-06 23:02:14,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106820 conditions, 14304 events. 9769/14304 cut-off events. For 225006/225006 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 84955 event pairs, 1737 based on Foata normal form. 2/14306 useless extension candidates. Maximal degree in co-relation 106667. Up to 5407 conditions per place. [2023-11-06 23:02:14,334 INFO L140 encePairwiseOnDemand]: 738/755 looper letters, 429 selfloop transitions, 394 changer transitions 7/830 dead transitions. [2023-11-06 23:02:14,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 830 transitions, 12831 flow [2023-11-06 23:02:14,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 23:02:14,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-06 23:02:14,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 7444 transitions. [2023-11-06 23:02:14,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943841059602649 [2023-11-06 23:02:14,347 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 7444 transitions. [2023-11-06 23:02:14,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 7444 transitions. [2023-11-06 23:02:14,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:14,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 7444 transitions. [2023-11-06 23:02:14,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 297.76) internal successors, (7444), 25 states have internal predecessors, (7444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:14,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 755.0) internal successors, (19630), 26 states have internal predecessors, (19630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:14,381 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 755.0) internal successors, (19630), 26 states have internal predecessors, (19630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:14,381 INFO L175 Difference]: Start difference. First operand has 188 places, 567 transitions, 8343 flow. Second operand 25 states and 7444 transitions. [2023-11-06 23:02:14,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 830 transitions, 12831 flow [2023-11-06 23:02:17,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 830 transitions, 12214 flow, removed 213 selfloop flow, removed 9 redundant places. [2023-11-06 23:02:17,139 INFO L231 Difference]: Finished difference. Result has 206 places, 597 transitions, 9267 flow [2023-11-06 23:02:17,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=755, PETRI_DIFFERENCE_MINUEND_FLOW=7799, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=9267, PETRI_PLACES=206, PETRI_TRANSITIONS=597} [2023-11-06 23:02:17,141 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 172 predicate places. [2023-11-06 23:02:17,141 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 597 transitions, 9267 flow [2023-11-06 23:02:17,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 290.24242424242425) internal successors, (9578), 33 states have internal predecessors, (9578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:17,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:17,143 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:17,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:17,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 23:02:17,353 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:02:17,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:17,353 INFO L85 PathProgramCache]: Analyzing trace with hash 2045567376, now seen corresponding path program 5 times [2023-11-06 23:02:17,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:17,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478273201] [2023-11-06 23:02:17,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:17,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:02:18,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:18,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478273201] [2023-11-06 23:02:18,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478273201] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:18,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473585721] [2023-11-06 23:02:18,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:02:18,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:18,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:18,968 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:18,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:02:19,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-06 23:02:19,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:02:19,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-06 23:02:19,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:19,750 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:02:19,750 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-06 23:02:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:02:19,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:20,483 INFO L322 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-11-06 23:02:20,483 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-11-06 23:02:20,698 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:02:20,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473585721] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:02:20,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:02:20,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 32 [2023-11-06 23:02:20,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002750858] [2023-11-06 23:02:20,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:20,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-06 23:02:20,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:20,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-06 23:02:20,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 23:02:23,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 755 [2023-11-06 23:02:23,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 597 transitions, 9267 flow. Second operand has 33 states, 33 states have (on average 290.24242424242425) internal successors, (9578), 33 states have internal predecessors, (9578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:23,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:23,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 755 [2023-11-06 23:02:23,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:31,814 INFO L124 PetriNetUnfolderBase]: 11288/16502 cut-off events. [2023-11-06 23:02:31,814 INFO L125 PetriNetUnfolderBase]: For 290498/290498 co-relation queries the response was YES. [2023-11-06 23:02:32,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129818 conditions, 16502 events. 11288/16502 cut-off events. For 290498/290498 co-relation queries the response was YES. Maximal size of possible extension queue 928. Compared 100208 event pairs, 1843 based on Foata normal form. 1/16503 useless extension candidates. Maximal degree in co-relation 129660. Up to 5620 conditions per place. [2023-11-06 23:02:32,106 INFO L140 encePairwiseOnDemand]: 738/755 looper letters, 460 selfloop transitions, 572 changer transitions 14/1046 dead transitions. [2023-11-06 23:02:32,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 1046 transitions, 16892 flow [2023-11-06 23:02:32,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 23:02:32,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-06 23:02:32,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 10114 transitions. [2023-11-06 23:02:32,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39400077911959486 [2023-11-06 23:02:32,123 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 10114 transitions. [2023-11-06 23:02:32,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 10114 transitions. [2023-11-06 23:02:32,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:32,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 10114 transitions. [2023-11-06 23:02:32,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 297.47058823529414) internal successors, (10114), 34 states have internal predecessors, (10114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:32,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 755.0) internal successors, (26425), 35 states have internal predecessors, (26425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:32,171 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 755.0) internal successors, (26425), 35 states have internal predecessors, (26425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:32,171 INFO L175 Difference]: Start difference. First operand has 206 places, 597 transitions, 9267 flow. Second operand 34 states and 10114 transitions. [2023-11-06 23:02:32,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 1046 transitions, 16892 flow [2023-11-06 23:02:37,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 1046 transitions, 16208 flow, removed 30 selfloop flow, removed 15 redundant places. [2023-11-06 23:02:37,738 INFO L231 Difference]: Finished difference. Result has 235 places, 777 transitions, 13041 flow [2023-11-06 23:02:37,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=755, PETRI_DIFFERENCE_MINUEND_FLOW=8732, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=13041, PETRI_PLACES=235, PETRI_TRANSITIONS=777} [2023-11-06 23:02:37,739 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 201 predicate places. [2023-11-06 23:02:37,739 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 777 transitions, 13041 flow [2023-11-06 23:02:37,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 290.24242424242425) internal successors, (9578), 33 states have internal predecessors, (9578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:37,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:37,741 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:37,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:37,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 23:02:37,941 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:02:37,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:37,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1231378424, now seen corresponding path program 6 times [2023-11-06 23:02:37,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:37,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634847049] [2023-11-06 23:02:37,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:37,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:39,524 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:02:39,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:39,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634847049] [2023-11-06 23:02:39,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634847049] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:39,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903464307] [2023-11-06 23:02:39,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:02:39,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:39,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:39,527 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:39,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 23:02:39,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 23:02:39,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:02:39,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 23:02:39,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:40,526 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:02:40,526 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 80 treesize of output 120 [2023-11-06 23:02:40,759 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:02:40,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:41,443 INFO L322 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-11-06 23:02:41,444 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-11-06 23:02:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:02:41,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903464307] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:02:41,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:02:41,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 34 [2023-11-06 23:02:41,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327954359] [2023-11-06 23:02:41,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:41,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 23:02:41,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:41,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 23:02:41,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 23:02:46,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 755 [2023-11-06 23:02:46,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 777 transitions, 13041 flow. Second operand has 35 states, 35 states have (on average 290.1714285714286) internal successors, (10156), 35 states have internal predecessors, (10156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:46,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:46,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 755 [2023-11-06 23:02:46,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:55,013 INFO L124 PetriNetUnfolderBase]: 11550/16891 cut-off events. [2023-11-06 23:02:55,013 INFO L125 PetriNetUnfolderBase]: For 335601/335601 co-relation queries the response was YES. [2023-11-06 23:02:55,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141057 conditions, 16891 events. 11550/16891 cut-off events. For 335601/335601 co-relation queries the response was YES. Maximal size of possible extension queue 948. Compared 102918 event pairs, 2238 based on Foata normal form. 2/16893 useless extension candidates. Maximal degree in co-relation 140888. Up to 6174 conditions per place. [2023-11-06 23:02:55,341 INFO L140 encePairwiseOnDemand]: 738/755 looper letters, 467 selfloop transitions, 523 changer transitions 7/997 dead transitions. [2023-11-06 23:02:55,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 997 transitions, 17468 flow [2023-11-06 23:02:55,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 23:02:55,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 23:02:55,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 7147 transitions. [2023-11-06 23:02:55,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3944260485651214 [2023-11-06 23:02:55,357 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 7147 transitions. [2023-11-06 23:02:55,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 7147 transitions. [2023-11-06 23:02:55,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:55,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 7147 transitions. [2023-11-06 23:02:55,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 297.7916666666667) internal successors, (7147), 24 states have internal predecessors, (7147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:55,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 755.0) internal successors, (18875), 25 states have internal predecessors, (18875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:55,401 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 755.0) internal successors, (18875), 25 states have internal predecessors, (18875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:55,402 INFO L175 Difference]: Start difference. First operand has 235 places, 777 transitions, 13041 flow. Second operand 24 states and 7147 transitions. [2023-11-06 23:02:55,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 997 transitions, 17468 flow [2023-11-06 23:03:01,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 997 transitions, 16864 flow, removed 73 selfloop flow, removed 18 redundant places. [2023-11-06 23:03:01,370 INFO L231 Difference]: Finished difference. Result has 243 places, 787 transitions, 13713 flow [2023-11-06 23:03:01,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=755, PETRI_DIFFERENCE_MINUEND_FLOW=12449, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=513, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=13713, PETRI_PLACES=243, PETRI_TRANSITIONS=787} [2023-11-06 23:03:01,371 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 209 predicate places. [2023-11-06 23:03:01,372 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 787 transitions, 13713 flow [2023-11-06 23:03:01,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 290.1714285714286) internal successors, (10156), 35 states have internal predecessors, (10156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:01,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:01,373 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:01,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-06 23:03:01,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:01,573 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:03:01,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:01,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1665648420, now seen corresponding path program 7 times [2023-11-06 23:03:01,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:01,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857459443] [2023-11-06 23:03:01,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:01,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:03:02,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:02,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857459443] [2023-11-06 23:03:02,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857459443] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:02,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338176176] [2023-11-06 23:03:02,954 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:03:02,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:02,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:02,955 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:02,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 23:03:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:03,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-06 23:03:03,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:03,505 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:03:03,505 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-06 23:03:03,588 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:03:03,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:04,140 INFO L322 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-11-06 23:03:04,140 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-11-06 23:03:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:03:04,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338176176] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:04,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:04,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 31 [2023-11-06 23:03:04,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868300694] [2023-11-06 23:03:04,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:04,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 23:03:04,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:04,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 23:03:04,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2023-11-06 23:03:08,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 755 [2023-11-06 23:03:08,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 787 transitions, 13713 flow. Second operand has 32 states, 32 states have (on average 290.28125) internal successors, (9289), 32 states have internal predecessors, (9289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:08,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:08,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 755 [2023-11-06 23:03:08,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:18,041 INFO L124 PetriNetUnfolderBase]: 12616/18436 cut-off events. [2023-11-06 23:03:18,041 INFO L125 PetriNetUnfolderBase]: For 393643/393643 co-relation queries the response was YES. [2023-11-06 23:03:18,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158627 conditions, 18436 events. 12616/18436 cut-off events. For 393643/393643 co-relation queries the response was YES. Maximal size of possible extension queue 1049. Compared 113468 event pairs, 2134 based on Foata normal form. 1/18437 useless extension candidates. Maximal degree in co-relation 158456. Up to 5798 conditions per place. [2023-11-06 23:03:18,425 INFO L140 encePairwiseOnDemand]: 739/755 looper letters, 460 selfloop transitions, 602 changer transitions 11/1073 dead transitions. [2023-11-06 23:03:18,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 1073 transitions, 19369 flow [2023-11-06 23:03:18,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 23:03:18,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-06 23:03:18,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 7457 transitions. [2023-11-06 23:03:18,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3950728476821192 [2023-11-06 23:03:18,440 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 7457 transitions. [2023-11-06 23:03:18,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 7457 transitions. [2023-11-06 23:03:18,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:18,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 7457 transitions. [2023-11-06 23:03:18,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 298.28) internal successors, (7457), 25 states have internal predecessors, (7457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:18,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 755.0) internal successors, (19630), 26 states have internal predecessors, (19630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:18,480 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 755.0) internal successors, (19630), 26 states have internal predecessors, (19630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:18,481 INFO L175 Difference]: Start difference. First operand has 243 places, 787 transitions, 13713 flow. Second operand 25 states and 7457 transitions. [2023-11-06 23:03:18,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 1073 transitions, 19369 flow [2023-11-06 23:03:26,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 1073 transitions, 18407 flow, removed 42 selfloop flow, removed 19 redundant places. [2023-11-06 23:03:26,045 INFO L231 Difference]: Finished difference. Result has 256 places, 841 transitions, 15233 flow [2023-11-06 23:03:26,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=755, PETRI_DIFFERENCE_MINUEND_FLOW=12777, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=787, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=548, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=15233, PETRI_PLACES=256, PETRI_TRANSITIONS=841} [2023-11-06 23:03:26,046 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 222 predicate places. [2023-11-06 23:03:26,046 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 841 transitions, 15233 flow [2023-11-06 23:03:26,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 290.28125) internal successors, (9289), 32 states have internal predecessors, (9289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:26,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:26,047 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:26,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:26,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:26,248 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:03:26,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:26,248 INFO L85 PathProgramCache]: Analyzing trace with hash -984616568, now seen corresponding path program 8 times [2023-11-06 23:03:26,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:26,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736904981] [2023-11-06 23:03:26,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:26,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:03:27,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:27,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736904981] [2023-11-06 23:03:27,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736904981] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:27,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377694210] [2023-11-06 23:03:27,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:03:27,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:27,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:27,673 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:27,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 23:03:27,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:03:27,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:27,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 23:03:27,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:28,476 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:03:28,477 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 113 [2023-11-06 23:03:28,732 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:03:28,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:29,493 INFO L322 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-11-06 23:03:29,493 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-11-06 23:03:29,646 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:03:29,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377694210] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:29,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:29,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 34 [2023-11-06 23:03:29,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798730263] [2023-11-06 23:03:29,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:29,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 23:03:29,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:29,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 23:03:29,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1047, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 23:03:34,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 755 [2023-11-06 23:03:34,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 841 transitions, 15233 flow. Second operand has 35 states, 35 states have (on average 290.1714285714286) internal successors, (10156), 35 states have internal predecessors, (10156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:34,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:34,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 755 [2023-11-06 23:03:34,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:45,848 INFO L124 PetriNetUnfolderBase]: 12734/18607 cut-off events. [2023-11-06 23:03:45,848 INFO L125 PetriNetUnfolderBase]: For 446194/446194 co-relation queries the response was YES. [2023-11-06 23:03:46,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165940 conditions, 18607 events. 12734/18607 cut-off events. For 446194/446194 co-relation queries the response was YES. Maximal size of possible extension queue 1048. Compared 114707 event pairs, 2304 based on Foata normal form. 1/18608 useless extension candidates. Maximal degree in co-relation 165761. Up to 6191 conditions per place. [2023-11-06 23:03:46,266 INFO L140 encePairwiseOnDemand]: 740/755 looper letters, 485 selfloop transitions, 571 changer transitions 9/1065 dead transitions. [2023-11-06 23:03:46,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 1065 transitions, 20074 flow [2023-11-06 23:03:46,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 23:03:46,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 23:03:46,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 6855 transitions. [2023-11-06 23:03:46,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3947595738554564 [2023-11-06 23:03:46,287 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 6855 transitions. [2023-11-06 23:03:46,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 6855 transitions. [2023-11-06 23:03:46,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:46,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 6855 transitions. [2023-11-06 23:03:46,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 298.04347826086956) internal successors, (6855), 23 states have internal predecessors, (6855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:46,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 755.0) internal successors, (18120), 24 states have internal predecessors, (18120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:46,499 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 755.0) internal successors, (18120), 24 states have internal predecessors, (18120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:46,499 INFO L175 Difference]: Start difference. First operand has 256 places, 841 transitions, 15233 flow. Second operand 23 states and 6855 transitions. [2023-11-06 23:03:46,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 1065 transitions, 20074 flow [2023-11-06 23:03:54,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 1065 transitions, 19499 flow, removed 108 selfloop flow, removed 11 redundant places. [2023-11-06 23:03:54,700 INFO L231 Difference]: Finished difference. Result has 269 places, 845 transitions, 15925 flow [2023-11-06 23:03:54,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=755, PETRI_DIFFERENCE_MINUEND_FLOW=14676, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=841, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=567, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=15925, PETRI_PLACES=269, PETRI_TRANSITIONS=845} [2023-11-06 23:03:54,702 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 235 predicate places. [2023-11-06 23:03:54,702 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 845 transitions, 15925 flow [2023-11-06 23:03:54,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 290.1714285714286) internal successors, (10156), 35 states have internal predecessors, (10156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:54,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:54,703 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:54,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-06 23:03:54,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-06 23:03:54,904 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:03:54,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:54,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1286334048, now seen corresponding path program 9 times [2023-11-06 23:03:54,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:54,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047098042] [2023-11-06 23:03:54,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:54,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:56,295 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 23:03:56,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:56,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047098042] [2023-11-06 23:03:56,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047098042] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:56,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342342072] [2023-11-06 23:03:56,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:03:56,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:56,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:56,297 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:56,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fea7581-efb8-428d-bbd5-1f69d5c6ed25/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 23:03:56,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 23:03:56,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:56,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 23:03:56,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:57,410 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:03:57,410 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 113