./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb679789-62a7-4388-bc22-fae7312e1ed0/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb679789-62a7-4388-bc22-fae7312e1ed0/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb679789-62a7-4388-bc22-fae7312e1ed0/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb679789-62a7-4388-bc22-fae7312e1ed0/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb679789-62a7-4388-bc22-fae7312e1ed0/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb679789-62a7-4388-bc22-fae7312e1ed0/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:09:13,172 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:09:13,304 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb679789-62a7-4388-bc22-fae7312e1ed0/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:09:13,316 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:09:13,317 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:09:13,353 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:09:13,355 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:09:13,355 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:09:13,357 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:09:13,363 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:09:13,363 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:09:13,364 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:09:13,365 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:09:13,367 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:09:13,368 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:09:13,368 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:09:13,369 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:09:13,369 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:09:13,370 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:09:13,371 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:09:13,371 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:09:13,372 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:09:13,373 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:09:13,373 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:09:13,374 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:09:13,375 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:09:13,375 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:09:13,376 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:09:13,377 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:09:13,377 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:09:13,379 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:09:13,379 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:09:13,380 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:09:13,380 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:09:13,380 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:09:13,381 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:09:13,381 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:09:13,381 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:09:13,382 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:09:13,382 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:09:13,382 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:09:13,383 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:09:13,384 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_bb679789-62a7-4388-bc22-fae7312e1ed0/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb679789-62a7-4388-bc22-fae7312e1ed0/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f [2023-11-21 22:09:13,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:09:13,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:09:13,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:09:13,808 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:09:13,809 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:09:13,811 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb679789-62a7-4388-bc22-fae7312e1ed0/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i [2023-11-21 22:09:17,144 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:09:17,542 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:09:17,543 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb679789-62a7-4388-bc22-fae7312e1ed0/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i [2023-11-21 22:09:17,572 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb679789-62a7-4388-bc22-fae7312e1ed0/bin/uautomizer-verify-bycVGegfSx/data/8d3226e76/af6f5385328a48b08d56f0398a79fb55/FLAG784d42e19 [2023-11-21 22:09:17,591 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb679789-62a7-4388-bc22-fae7312e1ed0/bin/uautomizer-verify-bycVGegfSx/data/8d3226e76/af6f5385328a48b08d56f0398a79fb55 [2023-11-21 22:09:17,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:09:17,596 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:09:17,598 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:09:17,598 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:09:17,605 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:09:17,606 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:09:17" (1/1) ... [2023-11-21 22:09:17,607 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@250842d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:09:17, skipping insertion in model container [2023-11-21 22:09:17,608 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:09:17" (1/1) ... [2023-11-21 22:09:17,673 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:09:18,047 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_bb679789-62a7-4388-bc22-fae7312e1ed0/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2023-11-21 22:09:18,060 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:09:18,075 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:09:18,138 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_bb679789-62a7-4388-bc22-fae7312e1ed0/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2023-11-21 22:09:18,142 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:09:18,196 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:09:18,197 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:09:18 WrapperNode [2023-11-21 22:09:18,197 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:09:18,199 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:09:18,200 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:09:18,200 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:09:18,209 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:09:18" (1/1) ... [2023-11-21 22:09:18,251 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:09:18" (1/1) ... [2023-11-21 22:09:18,290 INFO L138 Inliner]: procedures = 170, calls = 18, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 82 [2023-11-21 22:09:18,290 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:09:18,291 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:09:18,292 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:09:18,292 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:09:18,306 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:09:18" (1/1) ... [2023-11-21 22:09:18,307 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:09:18" (1/1) ... [2023-11-21 22:09:18,315 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:09:18" (1/1) ... [2023-11-21 22:09:18,345 INFO L187 HeapSplitter]: Split 4 memory accesses to 2 slices as follows [2, 2] [2023-11-21 22:09:18,347 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:09:18" (1/1) ... [2023-11-21 22:09:18,348 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:09:18" (1/1) ... [2023-11-21 22:09:18,360 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:09:18" (1/1) ... [2023-11-21 22:09:18,366 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:09:18" (1/1) ... [2023-11-21 22:09:18,375 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:09:18" (1/1) ... [2023-11-21 22:09:18,377 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:09:18" (1/1) ... [2023-11-21 22:09:18,385 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:09:18,389 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:09:18,390 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:09:18,390 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:09:18,391 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:09:18" (1/1) ... [2023-11-21 22:09:18,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:09:18,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb679789-62a7-4388-bc22-fae7312e1ed0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:09:18,435 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb679789-62a7-4388-bc22-fae7312e1ed0/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:09:18,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb679789-62a7-4388-bc22-fae7312e1ed0/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:09:18,490 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-11-21 22:09:18,491 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-11-21 22:09:18,491 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-21 22:09:18,491 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-21 22:09:18,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-21 22:09:18,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-21 22:09:18,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:09:18,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:09:18,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:09:18,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:09:18,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-21 22:09:18,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:09:18,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:09:18,496 WARN L212 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 22:09:18,656 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:09:18,659 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:09:18,851 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:09:19,066 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:09:19,066 INFO L308 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-21 22:09:19,068 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:09:19 BoogieIcfgContainer [2023-11-21 22:09:19,069 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:09:19,073 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:09:19,073 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:09:19,077 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:09:19,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:09:17" (1/3) ... [2023-11-21 22:09:19,079 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71be94bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:09:19, skipping insertion in model container [2023-11-21 22:09:19,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:09:18" (2/3) ... [2023-11-21 22:09:19,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71be94bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:09:19, skipping insertion in model container [2023-11-21 22:09:19,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:09:19" (3/3) ... [2023-11-21 22:09:19,081 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs.i [2023-11-21 22:09:19,093 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-21 22:09:19,109 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:09:19,110 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 22:09:19,110 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 22:09:19,176 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 22:09:19,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 24 transitions, 56 flow [2023-11-21 22:09:19,248 INFO L124 PetriNetUnfolderBase]: 3/25 cut-off events. [2023-11-21 22:09:19,256 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:09:19,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 25 events. 3/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 51 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 25. Up to 2 conditions per place. [2023-11-21 22:09:19,262 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 24 transitions, 56 flow [2023-11-21 22:09:19,266 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 23 transitions, 53 flow [2023-11-21 22:09:19,282 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:09:19,291 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@44558f10, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:09:19,291 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-21 22:09:19,303 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 22:09:19,304 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2023-11-21 22:09:19,304 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:09:19,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:09:19,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:09:19,306 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-21 22:09:19,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:19,312 INFO L85 PathProgramCache]: Analyzing trace with hash 32344680, now seen corresponding path program 1 times [2023-11-21 22:09:19,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:19,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545080589] [2023-11-21 22:09:19,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:19,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:09:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:09:19,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:09:19,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545080589] [2023-11-21 22:09:19,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545080589] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:09:19,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:09:19,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:09:19,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234556159] [2023-11-21 22:09:19,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:09:19,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:09:19,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:09:19,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:09:19,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:09:19,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 24 [2023-11-21 22:09:19,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 53 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:19,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:09:19,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 24 [2023-11-21 22:09:19,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:09:19,978 INFO L124 PetriNetUnfolderBase]: 99/199 cut-off events. [2023-11-21 22:09:19,979 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-21 22:09:19,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 199 events. 99/199 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 750 event pairs, 27 based on Foata normal form. 72/264 useless extension candidates. Maximal degree in co-relation 363. Up to 106 conditions per place. [2023-11-21 22:09:19,986 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 16 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-11-21 22:09:19,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 25 transitions, 93 flow [2023-11-21 22:09:19,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:09:19,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:09:20,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2023-11-21 22:09:20,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2023-11-21 22:09:20,003 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 50 transitions. [2023-11-21 22:09:20,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 50 transitions. [2023-11-21 22:09:20,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:09:20,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 50 transitions. [2023-11-21 22:09:20,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:20,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:20,017 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:20,020 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 53 flow. Second operand 3 states and 50 transitions. [2023-11-21 22:09:20,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 25 transitions, 93 flow [2023-11-21 22:09:20,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 25 transitions, 92 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:09:20,027 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 56 flow [2023-11-21 22:09:20,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2023-11-21 22:09:20,034 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2023-11-21 22:09:20,034 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 56 flow [2023-11-21 22:09:20,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:20,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:09:20,035 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-21 22:09:20,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:09:20,036 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-21 22:09:20,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:20,037 INFO L85 PathProgramCache]: Analyzing trace with hash 177235350, now seen corresponding path program 1 times [2023-11-21 22:09:20,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:20,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694473871] [2023-11-21 22:09:20,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:20,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:20,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 22:09:20,070 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 22:09:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 22:09:20,113 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-21 22:09:20,113 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 22:09:20,116 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-21 22:09:20,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-21 22:09:20,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-11-21 22:09:20,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-21 22:09:20,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:09:20,120 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-21 22:09:20,124 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-21 22:09:20,124 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-21 22:09:20,152 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 22:09:20,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 41 transitions, 102 flow [2023-11-21 22:09:20,169 INFO L124 PetriNetUnfolderBase]: 4/35 cut-off events. [2023-11-21 22:09:20,169 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-21 22:09:20,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 35 events. 4/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 70 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 42. Up to 3 conditions per place. [2023-11-21 22:09:20,170 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 41 transitions, 102 flow [2023-11-21 22:09:20,172 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 30 transitions, 73 flow [2023-11-21 22:09:20,174 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:09:20,176 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@44558f10, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:09:20,177 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-21 22:09:20,183 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 22:09:20,183 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-11-21 22:09:20,183 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:09:20,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:09:20,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:09:20,184 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-21 22:09:20,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:20,185 INFO L85 PathProgramCache]: Analyzing trace with hash -557996121, now seen corresponding path program 1 times [2023-11-21 22:09:20,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:20,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701026378] [2023-11-21 22:09:20,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:20,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:09:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:09:20,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:09:20,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701026378] [2023-11-21 22:09:20,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701026378] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:09:20,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:09:20,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:09:20,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694297165] [2023-11-21 22:09:20,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:09:20,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:09:20,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:09:20,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:09:20,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:09:20,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2023-11-21 22:09:20,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:20,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:09:20,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2023-11-21 22:09:20,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:09:20,670 INFO L124 PetriNetUnfolderBase]: 693/1119 cut-off events. [2023-11-21 22:09:20,670 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-11-21 22:09:20,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2158 conditions, 1119 events. 693/1119 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5467 event pairs, 138 based on Foata normal form. 443/1540 useless extension candidates. Maximal degree in co-relation 2147. Up to 814 conditions per place. [2023-11-21 22:09:20,686 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 22 selfloop transitions, 3 changer transitions 0/34 dead transitions. [2023-11-21 22:09:20,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 34 transitions, 136 flow [2023-11-21 22:09:20,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:09:20,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:09:20,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2023-11-21 22:09:20,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2023-11-21 22:09:20,689 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 77 transitions. [2023-11-21 22:09:20,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 77 transitions. [2023-11-21 22:09:20,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:09:20,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 77 transitions. [2023-11-21 22:09:20,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:20,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:20,692 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:20,692 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 73 flow. Second operand 3 states and 77 transitions. [2023-11-21 22:09:20,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 34 transitions, 136 flow [2023-11-21 22:09:20,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 135 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:09:20,701 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 81 flow [2023-11-21 22:09:20,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-11-21 22:09:20,702 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -2 predicate places. [2023-11-21 22:09:20,702 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 81 flow [2023-11-21 22:09:20,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:20,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:09:20,703 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2023-11-21 22:09:20,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:09:20,704 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-21 22:09:20,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:20,705 INFO L85 PathProgramCache]: Analyzing trace with hash -749585487, now seen corresponding path program 1 times [2023-11-21 22:09:20,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:20,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707960073] [2023-11-21 22:09:20,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:20,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 22:09:20,761 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 22:09:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 22:09:20,785 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-21 22:09:20,789 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 22:09:20,791 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-21 22:09:20,791 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-21 22:09:20,791 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2023-11-21 22:09:20,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-21 22:09:20,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-21 22:09:20,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 22:09:20,792 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-21 22:09:20,794 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-21 22:09:20,794 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-21 22:09:20,828 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 22:09:20,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 58 transitions, 152 flow [2023-11-21 22:09:20,838 INFO L124 PetriNetUnfolderBase]: 5/45 cut-off events. [2023-11-21 22:09:20,839 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-21 22:09:20,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 45 events. 5/45 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 92 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 56. Up to 4 conditions per place. [2023-11-21 22:09:20,840 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 58 transitions, 152 flow [2023-11-21 22:09:20,841 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 37 transitions, 95 flow [2023-11-21 22:09:20,842 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:09:20,844 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@44558f10, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:09:20,844 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-21 22:09:20,847 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 22:09:20,848 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-11-21 22:09:20,848 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:09:20,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:09:20,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:09:20,849 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-21 22:09:20,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:20,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1565831264, now seen corresponding path program 1 times [2023-11-21 22:09:20,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:20,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912386403] [2023-11-21 22:09:20,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:20,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:09:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:09:20,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:09:20,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912386403] [2023-11-21 22:09:20,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912386403] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:09:20,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:09:20,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:09:20,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827009633] [2023-11-21 22:09:20,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:09:20,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:09:20,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:09:20,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:09:20,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:09:20,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2023-11-21 22:09:20,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 95 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:20,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:09:20,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2023-11-21 22:09:20,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:09:21,640 INFO L124 PetriNetUnfolderBase]: 3801/5475 cut-off events. [2023-11-21 22:09:21,640 INFO L125 PetriNetUnfolderBase]: For 515/515 co-relation queries the response was YES. [2023-11-21 22:09:21,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10739 conditions, 5475 events. 3801/5475 cut-off events. For 515/515 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 29397 event pairs, 723 based on Foata normal form. 2292/7695 useless extension candidates. Maximal degree in co-relation 10727. Up to 4510 conditions per place. [2023-11-21 22:09:21,697 INFO L140 encePairwiseOnDemand]: 47/58 looper letters, 28 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2023-11-21 22:09:21,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 43 transitions, 183 flow [2023-11-21 22:09:21,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:09:21,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:09:21,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2023-11-21 22:09:21,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5977011494252874 [2023-11-21 22:09:21,700 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 104 transitions. [2023-11-21 22:09:21,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 104 transitions. [2023-11-21 22:09:21,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:09:21,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 104 transitions. [2023-11-21 22:09:21,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:21,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:21,703 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:21,703 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 95 flow. Second operand 3 states and 104 transitions. [2023-11-21 22:09:21,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 43 transitions, 183 flow [2023-11-21 22:09:21,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 43 transitions, 178 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-21 22:09:21,707 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 106 flow [2023-11-21 22:09:21,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2023-11-21 22:09:21,709 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-11-21 22:09:21,709 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 106 flow [2023-11-21 22:09:21,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:21,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:09:21,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:09:21,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:09:21,710 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-21 22:09:21,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:21,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1917220104, now seen corresponding path program 1 times [2023-11-21 22:09:21,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:21,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071598304] [2023-11-21 22:09:21,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:21,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:09:21,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:09:21,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:09:21,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071598304] [2023-11-21 22:09:21,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071598304] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:09:21,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:09:21,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:09:21,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42949914] [2023-11-21 22:09:21,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:09:21,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:09:21,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:09:21,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:09:21,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:09:21,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 58 [2023-11-21 22:09:21,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:21,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:09:21,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 58 [2023-11-21 22:09:21,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:09:21,932 INFO L124 PetriNetUnfolderBase]: 459/974 cut-off events. [2023-11-21 22:09:21,932 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2023-11-21 22:09:21,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2135 conditions, 974 events. 459/974 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5262 event pairs, 87 based on Foata normal form. 691/1622 useless extension candidates. Maximal degree in co-relation 2121. Up to 608 conditions per place. [2023-11-21 22:09:21,943 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 20 selfloop transitions, 8 changer transitions 0/40 dead transitions. [2023-11-21 22:09:21,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 40 transitions, 187 flow [2023-11-21 22:09:21,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:09:21,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:09:21,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2023-11-21 22:09:21,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5632183908045977 [2023-11-21 22:09:21,946 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 98 transitions. [2023-11-21 22:09:21,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 98 transitions. [2023-11-21 22:09:21,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:09:21,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 98 transitions. [2023-11-21 22:09:21,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:21,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:21,949 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:21,949 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 106 flow. Second operand 3 states and 98 transitions. [2023-11-21 22:09:21,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 40 transitions, 187 flow [2023-11-21 22:09:21,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:09:21,989 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 118 flow [2023-11-21 22:09:21,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2023-11-21 22:09:21,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -2 predicate places. [2023-11-21 22:09:21,991 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 118 flow [2023-11-21 22:09:21,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:21,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:09:21,991 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:09:21,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 22:09:21,992 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-21 22:09:21,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:21,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1943065003, now seen corresponding path program 1 times [2023-11-21 22:09:21,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:21,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266061258] [2023-11-21 22:09:21,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:21,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:22,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 22:09:22,031 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 22:09:22,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 22:09:22,058 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-21 22:09:22,058 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 22:09:22,059 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-21 22:09:22,059 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-21 22:09:22,059 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-11-21 22:09:22,060 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-21 22:09:22,060 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-21 22:09:22,060 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-21 22:09:22,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 22:09:22,061 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-21 22:09:22,062 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-21 22:09:22,062 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-21 22:09:22,109 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 22:09:22,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 75 transitions, 206 flow [2023-11-21 22:09:22,124 INFO L124 PetriNetUnfolderBase]: 6/55 cut-off events. [2023-11-21 22:09:22,124 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-21 22:09:22,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 55 events. 6/55 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 105 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 71. Up to 5 conditions per place. [2023-11-21 22:09:22,126 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 75 transitions, 206 flow [2023-11-21 22:09:22,127 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 44 transitions, 119 flow [2023-11-21 22:09:22,129 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:09:22,138 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@44558f10, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:09:22,138 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-21 22:09:22,142 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 22:09:22,142 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-11-21 22:09:22,142 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:09:22,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:09:22,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:09:22,143 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-21 22:09:22,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:22,144 INFO L85 PathProgramCache]: Analyzing trace with hash 2108859539, now seen corresponding path program 1 times [2023-11-21 22:09:22,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:22,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916622427] [2023-11-21 22:09:22,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:22,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:22,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:09:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:09:22,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:09:22,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916622427] [2023-11-21 22:09:22,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916622427] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:09:22,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:09:22,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:09:22,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499338656] [2023-11-21 22:09:22,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:09:22,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:09:22,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:09:22,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:09:22,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:09:22,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 75 [2023-11-21 22:09:22,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:22,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:09:22,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 75 [2023-11-21 22:09:22,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:09:25,592 INFO L124 PetriNetUnfolderBase]: 19029/25539 cut-off events. [2023-11-21 22:09:25,592 INFO L125 PetriNetUnfolderBase]: For 3395/3395 co-relation queries the response was YES. [2023-11-21 22:09:25,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50616 conditions, 25539 events. 19029/25539 cut-off events. For 3395/3395 co-relation queries the response was YES. Maximal size of possible extension queue 1063. Compared 144641 event pairs, 3960 based on Foata normal form. 11087/36401 useless extension candidates. Maximal degree in co-relation 50603. Up to 22390 conditions per place. [2023-11-21 22:09:25,942 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 34 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2023-11-21 22:09:25,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 234 flow [2023-11-21 22:09:25,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:09:25,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:09:25,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2023-11-21 22:09:25,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5822222222222222 [2023-11-21 22:09:25,947 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 131 transitions. [2023-11-21 22:09:25,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 131 transitions. [2023-11-21 22:09:25,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:09:25,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 131 transitions. [2023-11-21 22:09:25,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:25,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:25,956 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:25,956 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 119 flow. Second operand 3 states and 131 transitions. [2023-11-21 22:09:25,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 234 flow [2023-11-21 22:09:25,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 221 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-21 22:09:25,966 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 131 flow [2023-11-21 22:09:25,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2023-11-21 22:09:25,969 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -4 predicate places. [2023-11-21 22:09:25,970 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 131 flow [2023-11-21 22:09:25,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:25,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:09:25,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:09:25,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 22:09:25,973 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-21 22:09:25,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:25,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1991174929, now seen corresponding path program 1 times [2023-11-21 22:09:25,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:25,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449398167] [2023-11-21 22:09:25,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:25,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:25,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:09:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:09:26,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:09:26,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449398167] [2023-11-21 22:09:26,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449398167] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:09:26,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:09:26,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:09:26,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778756526] [2023-11-21 22:09:26,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:09:26,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:09:26,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:09:26,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:09:26,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:09:26,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 75 [2023-11-21 22:09:26,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:26,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:09:26,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 75 [2023-11-21 22:09:26,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:09:26,575 INFO L124 PetriNetUnfolderBase]: 1176/2367 cut-off events. [2023-11-21 22:09:26,576 INFO L125 PetriNetUnfolderBase]: For 503/503 co-relation queries the response was YES. [2023-11-21 22:09:26,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5235 conditions, 2367 events. 1176/2367 cut-off events. For 503/503 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14756 event pairs, 214 based on Foata normal form. 2343/4619 useless extension candidates. Maximal degree in co-relation 5220. Up to 1539 conditions per place. [2023-11-21 22:09:26,607 INFO L140 encePairwiseOnDemand]: 65/75 looper letters, 24 selfloop transitions, 10 changer transitions 0/48 dead transitions. [2023-11-21 22:09:26,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 48 transitions, 231 flow [2023-11-21 22:09:26,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:09:26,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:09:26,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2023-11-21 22:09:26,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-11-21 22:09:26,611 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 125 transitions. [2023-11-21 22:09:26,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 125 transitions. [2023-11-21 22:09:26,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:09:26,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 125 transitions. [2023-11-21 22:09:26,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:26,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:26,616 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:26,616 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 131 flow. Second operand 3 states and 125 transitions. [2023-11-21 22:09:26,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 48 transitions, 231 flow [2023-11-21 22:09:26,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 48 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:09:26,622 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 146 flow [2023-11-21 22:09:26,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2023-11-21 22:09:26,625 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2023-11-21 22:09:26,625 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 146 flow [2023-11-21 22:09:26,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:26,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:09:26,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:09:26,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 22:09:26,627 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-21 22:09:26,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:26,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1689741336, now seen corresponding path program 1 times [2023-11-21 22:09:26,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:26,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370406421] [2023-11-21 22:09:26,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:26,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:09:26,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:09:26,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:09:26,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370406421] [2023-11-21 22:09:26,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370406421] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:09:26,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:09:26,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:09:26,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546602545] [2023-11-21 22:09:26,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:09:26,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:09:26,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:09:26,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:09:26,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:09:26,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 75 [2023-11-21 22:09:26,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:26,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:09:26,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 75 [2023-11-21 22:09:26,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:09:27,583 INFO L124 PetriNetUnfolderBase]: 1852/3652 cut-off events. [2023-11-21 22:09:27,584 INFO L125 PetriNetUnfolderBase]: For 1083/1116 co-relation queries the response was YES. [2023-11-21 22:09:27,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9531 conditions, 3652 events. 1852/3652 cut-off events. For 1083/1116 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 25089 event pairs, 85 based on Foata normal form. 36/3672 useless extension candidates. Maximal degree in co-relation 9516. Up to 2321 conditions per place. [2023-11-21 22:09:27,621 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 49 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2023-11-21 22:09:27,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 71 transitions, 392 flow [2023-11-21 22:09:27,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:09:27,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:09:27,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 163 transitions. [2023-11-21 22:09:27,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5433333333333333 [2023-11-21 22:09:27,624 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 163 transitions. [2023-11-21 22:09:27,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 163 transitions. [2023-11-21 22:09:27,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:09:27,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 163 transitions. [2023-11-21 22:09:27,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:27,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:27,627 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:27,627 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 146 flow. Second operand 4 states and 163 transitions. [2023-11-21 22:09:27,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 71 transitions, 392 flow [2023-11-21 22:09:27,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 71 transitions, 366 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:09:27,635 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 188 flow [2023-11-21 22:09:27,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-11-21 22:09:27,637 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2023-11-21 22:09:27,638 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 188 flow [2023-11-21 22:09:27,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:27,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:09:27,639 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:09:27,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 22:09:27,639 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-21 22:09:27,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:27,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1318144147, now seen corresponding path program 1 times [2023-11-21 22:09:27,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:27,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334810563] [2023-11-21 22:09:27,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:27,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 22:09:27,666 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 22:09:27,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 22:09:27,684 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-21 22:09:27,685 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 22:09:27,685 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-21 22:09:27,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-21 22:09:27,686 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2023-11-21 22:09:27,686 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-21 22:09:27,686 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-21 22:09:27,687 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-21 22:09:27,687 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-21 22:09:27,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 22:09:27,687 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-21 22:09:27,688 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-21 22:09:27,689 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-21 22:09:27,733 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 22:09:27,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 92 transitions, 264 flow [2023-11-21 22:09:27,746 INFO L124 PetriNetUnfolderBase]: 7/65 cut-off events. [2023-11-21 22:09:27,746 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-21 22:09:27,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 65 events. 7/65 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 132 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 87. Up to 6 conditions per place. [2023-11-21 22:09:27,747 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 92 transitions, 264 flow [2023-11-21 22:09:27,748 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 51 transitions, 145 flow [2023-11-21 22:09:27,749 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:09:27,750 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@44558f10, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:09:27,750 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-21 22:09:27,753 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 22:09:27,753 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-11-21 22:09:27,753 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:09:27,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:09:27,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:09:27,754 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-11-21 22:09:27,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:27,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1036733724, now seen corresponding path program 1 times [2023-11-21 22:09:27,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:27,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104021510] [2023-11-21 22:09:27,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:27,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:27,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:09:27,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:09:27,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:09:27,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104021510] [2023-11-21 22:09:27,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104021510] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:09:27,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:09:27,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:09:27,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25504260] [2023-11-21 22:09:27,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:09:27,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:09:27,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:09:27,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:09:27,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:09:27,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 92 [2023-11-21 22:09:27,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:27,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:09:27,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 92 [2023-11-21 22:09:27,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:09:39,602 INFO L124 PetriNetUnfolderBase]: 91293/116751 cut-off events. [2023-11-21 22:09:39,602 INFO L125 PetriNetUnfolderBase]: For 19847/19847 co-relation queries the response was YES. [2023-11-21 22:09:39,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233065 conditions, 116751 events. 91293/116751 cut-off events. For 19847/19847 co-relation queries the response was YES. Maximal size of possible extension queue 3851. Compared 682770 event pairs, 21477 based on Foata normal form. 51884/167991 useless extension candidates. Maximal degree in co-relation 233051. Up to 105970 conditions per place. [2023-11-21 22:09:40,795 INFO L140 encePairwiseOnDemand]: 77/92 looper letters, 40 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2023-11-21 22:09:40,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 61 transitions, 289 flow [2023-11-21 22:09:40,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:09:40,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:09:40,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 158 transitions. [2023-11-21 22:09:40,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.572463768115942 [2023-11-21 22:09:40,799 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 158 transitions. [2023-11-21 22:09:40,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 158 transitions. [2023-11-21 22:09:40,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:09:40,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 158 transitions. [2023-11-21 22:09:40,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:40,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:40,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:40,804 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 145 flow. Second operand 3 states and 158 transitions. [2023-11-21 22:09:40,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 61 transitions, 289 flow [2023-11-21 22:09:40,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 61 transitions, 264 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-11-21 22:09:40,811 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 156 flow [2023-11-21 22:09:40,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2023-11-21 22:09:40,813 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -5 predicate places. [2023-11-21 22:09:40,813 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 156 flow [2023-11-21 22:09:40,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:40,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:09:40,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:09:40,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-21 22:09:40,815 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-11-21 22:09:40,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:40,816 INFO L85 PathProgramCache]: Analyzing trace with hash 413531057, now seen corresponding path program 1 times [2023-11-21 22:09:40,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:40,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685943199] [2023-11-21 22:09:40,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:40,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:09:40,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:09:40,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:09:40,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685943199] [2023-11-21 22:09:40,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685943199] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:09:40,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:09:40,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:09:40,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594400495] [2023-11-21 22:09:40,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:09:40,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:09:40,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:09:40,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:09:40,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:09:40,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 92 [2023-11-21 22:09:40,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:40,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:09:40,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 92 [2023-11-21 22:09:40,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:09:42,022 INFO L124 PetriNetUnfolderBase]: 2865/5542 cut-off events. [2023-11-21 22:09:42,022 INFO L125 PetriNetUnfolderBase]: For 1439/1439 co-relation queries the response was YES. [2023-11-21 22:09:42,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12335 conditions, 5542 events. 2865/5542 cut-off events. For 1439/1439 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 38934 event pairs, 523 based on Foata normal form. 7138/12493 useless extension candidates. Maximal degree in co-relation 12319. Up to 3714 conditions per place. [2023-11-21 22:09:42,068 INFO L140 encePairwiseOnDemand]: 80/92 looper letters, 28 selfloop transitions, 12 changer transitions 0/56 dead transitions. [2023-11-21 22:09:42,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 275 flow [2023-11-21 22:09:42,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:09:42,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:09:42,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 152 transitions. [2023-11-21 22:09:42,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5507246376811594 [2023-11-21 22:09:42,070 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 152 transitions. [2023-11-21 22:09:42,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 152 transitions. [2023-11-21 22:09:42,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:09:42,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 152 transitions. [2023-11-21 22:09:42,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:42,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:42,074 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:42,074 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 156 flow. Second operand 3 states and 152 transitions. [2023-11-21 22:09:42,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 275 flow [2023-11-21 22:09:42,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 56 transitions, 269 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:09:42,082 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 174 flow [2023-11-21 22:09:42,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-11-21 22:09:42,084 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -4 predicate places. [2023-11-21 22:09:42,084 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 174 flow [2023-11-21 22:09:42,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:42,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:09:42,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:09:42,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-21 22:09:42,086 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-11-21 22:09:42,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:42,087 INFO L85 PathProgramCache]: Analyzing trace with hash -2017108118, now seen corresponding path program 1 times [2023-11-21 22:09:42,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:42,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119156815] [2023-11-21 22:09:42,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:42,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:09:42,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:09:42,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:09:42,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119156815] [2023-11-21 22:09:42,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119156815] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:09:42,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:09:42,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:09:42,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426456545] [2023-11-21 22:09:42,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:09:42,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:09:42,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:09:42,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:09:42,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:09:42,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 92 [2023-11-21 22:09:42,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:42,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:09:42,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 92 [2023-11-21 22:09:42,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:09:43,314 INFO L124 PetriNetUnfolderBase]: 4277/8114 cut-off events. [2023-11-21 22:09:43,315 INFO L125 PetriNetUnfolderBase]: For 2275/2338 co-relation queries the response was YES. [2023-11-21 22:09:43,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21474 conditions, 8114 events. 4277/8114 cut-off events. For 2275/2338 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 60787 event pairs, 161 based on Foata normal form. 57/8151 useless extension candidates. Maximal degree in co-relation 21458. Up to 5809 conditions per place. [2023-11-21 22:09:43,411 INFO L140 encePairwiseOnDemand]: 85/92 looper letters, 58 selfloop transitions, 11 changer transitions 0/84 dead transitions. [2023-11-21 22:09:43,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 84 transitions, 472 flow [2023-11-21 22:09:43,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:09:43,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:09:43,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 198 transitions. [2023-11-21 22:09:43,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380434782608695 [2023-11-21 22:09:43,414 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 198 transitions. [2023-11-21 22:09:43,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 198 transitions. [2023-11-21 22:09:43,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:09:43,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 198 transitions. [2023-11-21 22:09:43,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:43,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:43,418 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:43,418 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 174 flow. Second operand 4 states and 198 transitions. [2023-11-21 22:09:43,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 84 transitions, 472 flow [2023-11-21 22:09:43,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 84 transitions, 441 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:09:43,429 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 226 flow [2023-11-21 22:09:43,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2023-11-21 22:09:43,431 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -1 predicate places. [2023-11-21 22:09:43,431 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 226 flow [2023-11-21 22:09:43,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:43,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:09:43,432 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:09:43,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-21 22:09:43,432 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-11-21 22:09:43,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:43,433 INFO L85 PathProgramCache]: Analyzing trace with hash -749236377, now seen corresponding path program 2 times [2023-11-21 22:09:43,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:43,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127790764] [2023-11-21 22:09:43,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:43,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:09:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:09:43,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:09:43,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127790764] [2023-11-21 22:09:43,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127790764] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:09:43,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806367185] [2023-11-21 22:09:43,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:09:43,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:09:43,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb679789-62a7-4388-bc22-fae7312e1ed0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:09:43,669 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb679789-62a7-4388-bc22-fae7312e1ed0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:09:43,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb679789-62a7-4388-bc22-fae7312e1ed0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:09:43,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:09:43,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:09:43,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 22:09:43,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:09:44,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:09:44,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:09:44,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:09:44,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806367185] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:09:44,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:09:44,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-21 22:09:44,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712092452] [2023-11-21 22:09:44,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:09:44,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 22:09:44,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:09:44,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 22:09:44,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:09:44,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 92 [2023-11-21 22:09:44,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 226 flow. Second operand has 11 states, 11 states have (on average 35.54545454545455) internal successors, (391), 11 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:44,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:09:44,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 92 [2023-11-21 22:09:44,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:09:46,707 INFO L124 PetriNetUnfolderBase]: 10547/20010 cut-off events. [2023-11-21 22:09:46,707 INFO L125 PetriNetUnfolderBase]: For 8600/8999 co-relation queries the response was YES. [2023-11-21 22:09:46,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50172 conditions, 20010 events. 10547/20010 cut-off events. For 8600/8999 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 173178 event pairs, 2022 based on Foata normal form. 183/20131 useless extension candidates. Maximal degree in co-relation 50153. Up to 6603 conditions per place. [2023-11-21 22:09:46,885 INFO L140 encePairwiseOnDemand]: 85/92 looper letters, 59 selfloop transitions, 26 changer transitions 0/100 dead transitions. [2023-11-21 22:09:46,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 100 transitions, 598 flow [2023-11-21 22:09:46,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:09:46,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 22:09:46,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 236 transitions. [2023-11-21 22:09:46,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5130434782608696 [2023-11-21 22:09:46,889 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 236 transitions. [2023-11-21 22:09:46,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 236 transitions. [2023-11-21 22:09:46,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:09:46,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 236 transitions. [2023-11-21 22:09:46,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 47.2) internal successors, (236), 5 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:46,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:46,893 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:46,893 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 226 flow. Second operand 5 states and 236 transitions. [2023-11-21 22:09:46,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 100 transitions, 598 flow [2023-11-21 22:09:46,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 100 transitions, 576 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-21 22:09:46,907 INFO L231 Difference]: Finished difference. Result has 60 places, 63 transitions, 333 flow [2023-11-21 22:09:46,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=333, PETRI_PLACES=60, PETRI_TRANSITIONS=63} [2023-11-21 22:09:46,908 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 2 predicate places. [2023-11-21 22:09:46,908 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 63 transitions, 333 flow [2023-11-21 22:09:46,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 35.54545454545455) internal successors, (391), 11 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:46,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:09:46,909 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:09:46,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb679789-62a7-4388-bc22-fae7312e1ed0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:09:47,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb679789-62a7-4388-bc22-fae7312e1ed0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-21 22:09:47,117 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-11-21 22:09:47,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:47,118 INFO L85 PathProgramCache]: Analyzing trace with hash -866430764, now seen corresponding path program 1 times [2023-11-21 22:09:47,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:47,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8577367] [2023-11-21 22:09:47,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:47,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:47,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 22:09:47,149 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 22:09:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 22:09:47,169 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-21 22:09:47,170 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 22:09:47,170 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-21 22:09:47,170 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-11-21 22:09:47,171 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 8 remaining) [2023-11-21 22:09:47,171 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-11-21 22:09:47,171 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-11-21 22:09:47,171 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-11-21 22:09:47,172 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-11-21 22:09:47,172 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-11-21 22:09:47,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-21 22:09:47,172 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-11-21 22:09:47,173 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-21 22:09:47,173 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-21 22:09:47,227 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 22:09:47,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 109 transitions, 326 flow [2023-11-21 22:09:47,239 INFO L124 PetriNetUnfolderBase]: 8/75 cut-off events. [2023-11-21 22:09:47,240 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-21 22:09:47,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 75 events. 8/75 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 141 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 104. Up to 7 conditions per place. [2023-11-21 22:09:47,240 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 109 transitions, 326 flow [2023-11-21 22:09:47,242 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 58 transitions, 173 flow [2023-11-21 22:09:47,243 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:09:47,244 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@44558f10, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:09:47,244 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-21 22:09:47,265 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 22:09:47,265 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-11-21 22:09:47,265 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:09:47,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:09:47,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:09:47,266 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-21 22:09:47,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:47,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1633368691, now seen corresponding path program 1 times [2023-11-21 22:09:47,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:47,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582203505] [2023-11-21 22:09:47,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:47,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:47,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:09:47,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:09:47,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:09:47,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582203505] [2023-11-21 22:09:47,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582203505] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:09:47,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:09:47,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:09:47,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795174223] [2023-11-21 22:09:47,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:09:47,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:09:47,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:09:47,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:09:47,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:09:47,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 109 [2023-11-21 22:09:47,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 173 flow. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:09:47,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:09:47,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 109 [2023-11-21 22:09:47,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand