./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2aa715856437bb3403b6a2717a4123b124cdc9b291b63ee677b7c1993b3be7b6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:54:55,305 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:54:55,437 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:54:55,448 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:54:55,449 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:54:55,484 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:54:55,485 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:54:55,485 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:54:55,486 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:54:55,487 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:54:55,488 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:54:55,488 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:54:55,489 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:54:55,490 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:54:55,491 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:54:55,491 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:54:55,492 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:54:55,492 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:54:55,493 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:54:55,493 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:54:55,494 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:54:55,494 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:54:55,495 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:54:55,495 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:54:55,496 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:54:55,497 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:54:55,497 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:54:55,498 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:54:55,498 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:54:55,499 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:54:55,499 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:54:55,500 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:54:55,500 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:54:55,501 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:54:55,501 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:54:55,502 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:54:55,502 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:54:55,503 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:54:55,503 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:54:55,504 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_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2aa715856437bb3403b6a2717a4123b124cdc9b291b63ee677b7c1993b3be7b6 [2023-11-19 07:54:55,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:54:55,896 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:54:55,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:54:55,901 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:54:55,902 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:54:55,903 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2023-11-19 07:54:59,369 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:54:59,653 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:54:59,654 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2023-11-19 07:54:59,665 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/data/52eb13c70/5049d28f14c14b5d96c2925f19c7b2ff/FLAGf63dcb3ea [2023-11-19 07:54:59,694 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/data/52eb13c70/5049d28f14c14b5d96c2925f19c7b2ff [2023-11-19 07:54:59,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:54:59,707 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:54:59,709 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:54:59,709 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:54:59,715 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:54:59,718 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:54:59" (1/1) ... [2023-11-19 07:54:59,720 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@552ff0a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:59, skipping insertion in model container [2023-11-19 07:54:59,720 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:54:59" (1/1) ... [2023-11-19 07:54:59,757 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:55:00,039 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_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c[2630,2643] [2023-11-19 07:55:00,055 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:55:00,074 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:55:00,109 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_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c[2630,2643] [2023-11-19 07:55:00,110 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:55:00,120 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:55:00,120 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:55:00,131 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:55:00,132 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:00 WrapperNode [2023-11-19 07:55:00,132 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:55:00,133 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:55:00,134 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:55:00,134 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:55:00,141 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:00" (1/1) ... [2023-11-19 07:55:00,150 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:00" (1/1) ... [2023-11-19 07:55:00,177 INFO L138 Inliner]: procedures = 22, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 69 [2023-11-19 07:55:00,177 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:55:00,178 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:55:00,179 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:55:00,179 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:55:00,191 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:00" (1/1) ... [2023-11-19 07:55:00,191 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:00" (1/1) ... [2023-11-19 07:55:00,196 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:00" (1/1) ... [2023-11-19 07:55:00,196 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:00" (1/1) ... [2023-11-19 07:55:00,204 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:00" (1/1) ... [2023-11-19 07:55:00,208 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:00" (1/1) ... [2023-11-19 07:55:00,211 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:00" (1/1) ... [2023-11-19 07:55:00,212 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:00" (1/1) ... [2023-11-19 07:55:00,216 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:55:00,217 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:55:00,217 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:55:00,217 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:55:00,219 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:00" (1/1) ... [2023-11-19 07:55:00,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:55:00,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:00,262 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:00,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:55:00,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:55:00,320 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:55:00,321 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:55:00,321 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:55:00,321 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:55:00,321 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 07:55:00,322 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 07:55:00,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:55:00,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:55:00,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:55:00,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:55:00,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:55:00,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:55:00,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:55:00,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:55:00,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:55:00,329 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:55:00,448 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:55:00,450 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:55:00,729 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:55:00,840 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:55:00,840 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 07:55:00,844 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:00 BoogieIcfgContainer [2023-11-19 07:55:00,844 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:55:00,848 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:55:00,848 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:55:00,852 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:55:00,853 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:54:59" (1/3) ... [2023-11-19 07:55:00,854 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47541d7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:55:00, skipping insertion in model container [2023-11-19 07:55:00,854 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:00" (2/3) ... [2023-11-19 07:55:00,854 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47541d7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:55:00, skipping insertion in model container [2023-11-19 07:55:00,855 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:00" (3/3) ... [2023-11-19 07:55:00,856 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-equiv.wvr.c [2023-11-19 07:55:00,867 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:55:00,880 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:55:00,881 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:55:00,881 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:55:00,965 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 07:55:01,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 98 transitions, 217 flow [2023-11-19 07:55:01,106 INFO L124 PetriNetUnfolderBase]: 7/95 cut-off events. [2023-11-19 07:55:01,106 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:55:01,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 95 events. 7/95 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2023-11-19 07:55:01,114 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 98 transitions, 217 flow [2023-11-19 07:55:01,120 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 84 transitions, 186 flow [2023-11-19 07:55:01,124 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:55:01,137 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 87 places, 84 transitions, 186 flow [2023-11-19 07:55:01,141 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 87 places, 84 transitions, 186 flow [2023-11-19 07:55:01,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 84 transitions, 186 flow [2023-11-19 07:55:01,178 INFO L124 PetriNetUnfolderBase]: 7/84 cut-off events. [2023-11-19 07:55:01,178 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:55:01,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 84 events. 7/84 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2023-11-19 07:55:01,182 INFO L119 LiptonReduction]: Number of co-enabled transitions 1026 [2023-11-19 07:55:04,384 INFO L134 LiptonReduction]: Checked pairs total: 1424 [2023-11-19 07:55:04,384 INFO L136 LiptonReduction]: Total number of compositions: 66 [2023-11-19 07:55:04,420 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:55:04,427 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;@2520517d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:55:04,427 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 07:55:04,437 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:55:04,437 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2023-11-19 07:55:04,437 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:55:04,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:04,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:04,439 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:55:04,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:04,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1976262320, now seen corresponding path program 1 times [2023-11-19 07:55:04,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:04,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808510219] [2023-11-19 07:55:04,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:04,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:04,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:05,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:05,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:05,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808510219] [2023-11-19 07:55:05,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808510219] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:05,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:05,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:55:05,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246706526] [2023-11-19 07:55:05,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:05,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:55:05,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:05,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:55:05,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:55:05,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 164 [2023-11-19 07:55:05,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:05,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:05,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 164 [2023-11-19 07:55:05,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:05,547 INFO L124 PetriNetUnfolderBase]: 509/755 cut-off events. [2023-11-19 07:55:05,547 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2023-11-19 07:55:05,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1535 conditions, 755 events. 509/755 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2772 event pairs, 95 based on Foata normal form. 1/522 useless extension candidates. Maximal degree in co-relation 1230. Up to 531 conditions per place. [2023-11-19 07:55:05,563 INFO L140 encePairwiseOnDemand]: 159/164 looper letters, 34 selfloop transitions, 4 changer transitions 1/42 dead transitions. [2023-11-19 07:55:05,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 42 transitions, 195 flow [2023-11-19 07:55:05,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:55:05,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:55:05,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 292 transitions. [2023-11-19 07:55:05,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2023-11-19 07:55:05,583 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 292 transitions. [2023-11-19 07:55:05,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 292 transitions. [2023-11-19 07:55:05,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:05,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 292 transitions. [2023-11-19 07:55:05,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:05,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:05,598 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:05,600 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 66 flow. Second operand 3 states and 292 transitions. [2023-11-19 07:55:05,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 42 transitions, 195 flow [2023-11-19 07:55:05,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 42 transitions, 173 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-19 07:55:05,607 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 80 flow [2023-11-19 07:55:05,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2023-11-19 07:55:05,612 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2023-11-19 07:55:05,613 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 80 flow [2023-11-19 07:55:05,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:05,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:05,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:05,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:55:05,614 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:55:05,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:05,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1504693125, now seen corresponding path program 1 times [2023-11-19 07:55:05,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:05,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026178617] [2023-11-19 07:55:05,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:05,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:06,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:06,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:06,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026178617] [2023-11-19 07:55:06,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026178617] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:06,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:06,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:55:06,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412467874] [2023-11-19 07:55:06,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:06,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:55:06,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:06,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:55:06,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:55:06,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 164 [2023-11-19 07:55:06,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 80 flow. Second operand has 6 states, 6 states have (on average 78.16666666666667) internal successors, (469), 6 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:06,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:06,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 164 [2023-11-19 07:55:06,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:06,435 INFO L124 PetriNetUnfolderBase]: 545/829 cut-off events. [2023-11-19 07:55:06,435 INFO L125 PetriNetUnfolderBase]: For 170/175 co-relation queries the response was YES. [2023-11-19 07:55:06,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1941 conditions, 829 events. 545/829 cut-off events. For 170/175 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3320 event pairs, 38 based on Foata normal form. 37/860 useless extension candidates. Maximal degree in co-relation 391. Up to 377 conditions per place. [2023-11-19 07:55:06,445 INFO L140 encePairwiseOnDemand]: 157/164 looper letters, 68 selfloop transitions, 12 changer transitions 0/82 dead transitions. [2023-11-19 07:55:06,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 82 transitions, 383 flow [2023-11-19 07:55:06,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:55:06,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:55:06,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 605 transitions. [2023-11-19 07:55:06,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5270034843205574 [2023-11-19 07:55:06,453 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 605 transitions. [2023-11-19 07:55:06,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 605 transitions. [2023-11-19 07:55:06,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:06,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 605 transitions. [2023-11-19 07:55:06,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 86.42857142857143) internal successors, (605), 7 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:06,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 164.0) internal successors, (1312), 8 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:06,469 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 164.0) internal successors, (1312), 8 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:06,469 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 80 flow. Second operand 7 states and 605 transitions. [2023-11-19 07:55:06,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 82 transitions, 383 flow [2023-11-19 07:55:06,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 82 transitions, 375 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:55:06,476 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 156 flow [2023-11-19 07:55:06,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=156, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2023-11-19 07:55:06,482 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2023-11-19 07:55:06,482 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 156 flow [2023-11-19 07:55:06,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 78.16666666666667) internal successors, (469), 6 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:06,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:06,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:06,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:55:06,484 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:55:06,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:06,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1403182749, now seen corresponding path program 2 times [2023-11-19 07:55:06,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:06,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310573047] [2023-11-19 07:55:06,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:06,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:06,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:06,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:06,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:06,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310573047] [2023-11-19 07:55:06,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310573047] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:06,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:06,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:55:06,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811639433] [2023-11-19 07:55:06,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:06,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:55:06,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:06,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:55:06,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:55:06,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 164 [2023-11-19 07:55:06,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 78.8) internal successors, (394), 5 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:06,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:06,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 164 [2023-11-19 07:55:06,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:07,195 INFO L124 PetriNetUnfolderBase]: 875/1315 cut-off events. [2023-11-19 07:55:07,195 INFO L125 PetriNetUnfolderBase]: For 800/826 co-relation queries the response was YES. [2023-11-19 07:55:07,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3694 conditions, 1315 events. 875/1315 cut-off events. For 800/826 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5672 event pairs, 34 based on Foata normal form. 32/1333 useless extension candidates. Maximal degree in co-relation 2448. Up to 567 conditions per place. [2023-11-19 07:55:07,211 INFO L140 encePairwiseOnDemand]: 156/164 looper letters, 72 selfloop transitions, 15 changer transitions 3/92 dead transitions. [2023-11-19 07:55:07,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 92 transitions, 505 flow [2023-11-19 07:55:07,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:55:07,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:55:07,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 536 transitions. [2023-11-19 07:55:07,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2023-11-19 07:55:07,214 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 536 transitions. [2023-11-19 07:55:07,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 536 transitions. [2023-11-19 07:55:07,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:07,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 536 transitions. [2023-11-19 07:55:07,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 89.33333333333333) internal successors, (536), 6 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:07,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:07,221 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:07,222 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 156 flow. Second operand 6 states and 536 transitions. [2023-11-19 07:55:07,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 92 transitions, 505 flow [2023-11-19 07:55:07,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 92 transitions, 505 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:55:07,237 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 243 flow [2023-11-19 07:55:07,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-11-19 07:55:07,239 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 14 predicate places. [2023-11-19 07:55:07,243 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 243 flow [2023-11-19 07:55:07,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.8) internal successors, (394), 5 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:07,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:07,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:07,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:55:07,244 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:55:07,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:07,246 INFO L85 PathProgramCache]: Analyzing trace with hash -282055121, now seen corresponding path program 3 times [2023-11-19 07:55:07,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:07,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868070800] [2023-11-19 07:55:07,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:07,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:07,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:07,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:07,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:07,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868070800] [2023-11-19 07:55:07,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868070800] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:07,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:07,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:55:07,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984047273] [2023-11-19 07:55:07,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:07,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:55:07,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:07,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:55:07,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:55:07,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 164 [2023-11-19 07:55:07,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 243 flow. Second operand has 5 states, 5 states have (on average 79.8) internal successors, (399), 5 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:07,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:07,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 164 [2023-11-19 07:55:07,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:07,956 INFO L124 PetriNetUnfolderBase]: 1004/1516 cut-off events. [2023-11-19 07:55:07,956 INFO L125 PetriNetUnfolderBase]: For 2330/2383 co-relation queries the response was YES. [2023-11-19 07:55:07,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5001 conditions, 1516 events. 1004/1516 cut-off events. For 2330/2383 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 6790 event pairs, 173 based on Foata normal form. 48/1539 useless extension candidates. Maximal degree in co-relation 3640. Up to 1085 conditions per place. [2023-11-19 07:55:07,975 INFO L140 encePairwiseOnDemand]: 157/164 looper letters, 62 selfloop transitions, 15 changer transitions 3/82 dead transitions. [2023-11-19 07:55:07,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 82 transitions, 572 flow [2023-11-19 07:55:07,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:55:07,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:55:07,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 521 transitions. [2023-11-19 07:55:07,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5294715447154471 [2023-11-19 07:55:07,979 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 521 transitions. [2023-11-19 07:55:07,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 521 transitions. [2023-11-19 07:55:07,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:07,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 521 transitions. [2023-11-19 07:55:07,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 86.83333333333333) internal successors, (521), 6 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:07,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:07,987 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:07,987 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 243 flow. Second operand 6 states and 521 transitions. [2023-11-19 07:55:07,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 82 transitions, 572 flow [2023-11-19 07:55:07,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 82 transitions, 554 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-19 07:55:07,999 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 337 flow [2023-11-19 07:55:07,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=337, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2023-11-19 07:55:08,001 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 20 predicate places. [2023-11-19 07:55:08,001 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 337 flow [2023-11-19 07:55:08,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 79.8) internal successors, (399), 5 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:08,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:08,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:08,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:55:08,002 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:55:08,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:08,003 INFO L85 PathProgramCache]: Analyzing trace with hash 512449357, now seen corresponding path program 1 times [2023-11-19 07:55:08,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:08,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759106328] [2023-11-19 07:55:08,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:08,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:08,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:08,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:08,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759106328] [2023-11-19 07:55:08,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759106328] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:08,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:08,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:55:08,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253800222] [2023-11-19 07:55:08,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:08,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:55:08,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:08,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:55:08,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:55:08,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 164 [2023-11-19 07:55:08,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 337 flow. Second operand has 6 states, 6 states have (on average 75.33333333333333) internal successors, (452), 6 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:08,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:08,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 164 [2023-11-19 07:55:08,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:09,338 INFO L124 PetriNetUnfolderBase]: 1359/2062 cut-off events. [2023-11-19 07:55:09,338 INFO L125 PetriNetUnfolderBase]: For 5027/5058 co-relation queries the response was YES. [2023-11-19 07:55:09,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7838 conditions, 2062 events. 1359/2062 cut-off events. For 5027/5058 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 9740 event pairs, 231 based on Foata normal form. 95/2151 useless extension candidates. Maximal degree in co-relation 5546. Up to 1416 conditions per place. [2023-11-19 07:55:09,363 INFO L140 encePairwiseOnDemand]: 157/164 looper letters, 84 selfloop transitions, 17 changer transitions 6/108 dead transitions. [2023-11-19 07:55:09,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 108 transitions, 802 flow [2023-11-19 07:55:09,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:55:09,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:55:09,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 515 transitions. [2023-11-19 07:55:09,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5233739837398373 [2023-11-19 07:55:09,367 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 515 transitions. [2023-11-19 07:55:09,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 515 transitions. [2023-11-19 07:55:09,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:09,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 515 transitions. [2023-11-19 07:55:09,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 85.83333333333333) internal successors, (515), 6 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:09,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:09,374 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:09,375 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 337 flow. Second operand 6 states and 515 transitions. [2023-11-19 07:55:09,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 108 transitions, 802 flow [2023-11-19 07:55:09,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 108 transitions, 771 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-19 07:55:09,397 INFO L231 Difference]: Finished difference. Result has 56 places, 58 transitions, 439 flow [2023-11-19 07:55:09,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=439, PETRI_PLACES=56, PETRI_TRANSITIONS=58} [2023-11-19 07:55:09,400 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 25 predicate places. [2023-11-19 07:55:09,401 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 58 transitions, 439 flow [2023-11-19 07:55:09,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 75.33333333333333) internal successors, (452), 6 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:09,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:09,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:09,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:55:09,402 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:55:09,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:09,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1440222638, now seen corresponding path program 1 times [2023-11-19 07:55:09,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:09,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304075259] [2023-11-19 07:55:09,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:09,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:09,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:09,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:09,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304075259] [2023-11-19 07:55:09,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304075259] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:09,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:09,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:55:09,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824836546] [2023-11-19 07:55:09,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:09,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:55:09,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:09,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:55:09,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:55:09,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 164 [2023-11-19 07:55:09,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 58 transitions, 439 flow. Second operand has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:09,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:09,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 164 [2023-11-19 07:55:09,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:10,495 INFO L124 PetriNetUnfolderBase]: 1862/2844 cut-off events. [2023-11-19 07:55:10,496 INFO L125 PetriNetUnfolderBase]: For 10906/10909 co-relation queries the response was YES. [2023-11-19 07:55:10,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11714 conditions, 2844 events. 1862/2844 cut-off events. For 10906/10909 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 14603 event pairs, 354 based on Foata normal form. 40/2857 useless extension candidates. Maximal degree in co-relation 9200. Up to 1284 conditions per place. [2023-11-19 07:55:10,529 INFO L140 encePairwiseOnDemand]: 156/164 looper letters, 109 selfloop transitions, 53 changer transitions 9/172 dead transitions. [2023-11-19 07:55:10,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 172 transitions, 1631 flow [2023-11-19 07:55:10,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:55:10,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:55:10,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 525 transitions. [2023-11-19 07:55:10,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2023-11-19 07:55:10,533 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 525 transitions. [2023-11-19 07:55:10,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 525 transitions. [2023-11-19 07:55:10,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:10,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 525 transitions. [2023-11-19 07:55:10,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 87.5) internal successors, (525), 6 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:10,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:10,539 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:10,539 INFO L175 Difference]: Start difference. First operand has 56 places, 58 transitions, 439 flow. Second operand 6 states and 525 transitions. [2023-11-19 07:55:10,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 172 transitions, 1631 flow [2023-11-19 07:55:10,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 172 transitions, 1602 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-19 07:55:10,560 INFO L231 Difference]: Finished difference. Result has 63 places, 103 transitions, 1036 flow [2023-11-19 07:55:10,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1036, PETRI_PLACES=63, PETRI_TRANSITIONS=103} [2023-11-19 07:55:10,561 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 32 predicate places. [2023-11-19 07:55:10,561 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 103 transitions, 1036 flow [2023-11-19 07:55:10,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:10,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:10,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:10,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:55:10,563 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:55:10,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:10,563 INFO L85 PathProgramCache]: Analyzing trace with hash 587399024, now seen corresponding path program 2 times [2023-11-19 07:55:10,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:10,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121704272] [2023-11-19 07:55:10,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:10,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:10,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:10,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:10,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:10,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121704272] [2023-11-19 07:55:10,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121704272] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:10,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:10,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:55:10,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679024875] [2023-11-19 07:55:10,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:10,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:55:10,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:10,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:55:10,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:55:10,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 164 [2023-11-19 07:55:10,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 103 transitions, 1036 flow. Second operand has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:10,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:10,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 164 [2023-11-19 07:55:10,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:11,514 INFO L124 PetriNetUnfolderBase]: 2218/3448 cut-off events. [2023-11-19 07:55:11,514 INFO L125 PetriNetUnfolderBase]: For 16715/16752 co-relation queries the response was YES. [2023-11-19 07:55:11,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16519 conditions, 3448 events. 2218/3448 cut-off events. For 16715/16752 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 18720 event pairs, 530 based on Foata normal form. 64/3496 useless extension candidates. Maximal degree in co-relation 12219. Up to 1758 conditions per place. [2023-11-19 07:55:11,554 INFO L140 encePairwiseOnDemand]: 157/164 looper letters, 85 selfloop transitions, 71 changer transitions 2/159 dead transitions. [2023-11-19 07:55:11,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 159 transitions, 1697 flow [2023-11-19 07:55:11,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:55:11,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:55:11,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 446 transitions. [2023-11-19 07:55:11,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5439024390243903 [2023-11-19 07:55:11,558 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 446 transitions. [2023-11-19 07:55:11,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 446 transitions. [2023-11-19 07:55:11,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:11,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 446 transitions. [2023-11-19 07:55:11,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 89.2) internal successors, (446), 5 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:11,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:11,562 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:11,563 INFO L175 Difference]: Start difference. First operand has 63 places, 103 transitions, 1036 flow. Second operand 5 states and 446 transitions. [2023-11-19 07:55:11,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 159 transitions, 1697 flow [2023-11-19 07:55:11,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 159 transitions, 1695 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-19 07:55:11,611 INFO L231 Difference]: Finished difference. Result has 70 places, 113 transitions, 1383 flow [2023-11-19 07:55:11,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1383, PETRI_PLACES=70, PETRI_TRANSITIONS=113} [2023-11-19 07:55:11,612 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 39 predicate places. [2023-11-19 07:55:11,612 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 113 transitions, 1383 flow [2023-11-19 07:55:11,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:11,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:11,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:11,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:55:11,614 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:55:11,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:11,614 INFO L85 PathProgramCache]: Analyzing trace with hash 510317406, now seen corresponding path program 3 times [2023-11-19 07:55:11,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:11,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696867531] [2023-11-19 07:55:11,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:11,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:11,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:11,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696867531] [2023-11-19 07:55:11,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696867531] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:11,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:11,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:55:11,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471038171] [2023-11-19 07:55:11,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:11,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:55:11,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:11,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:55:11,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:55:11,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 164 [2023-11-19 07:55:11,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 113 transitions, 1383 flow. Second operand has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:11,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:11,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 164 [2023-11-19 07:55:11,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:12,693 INFO L124 PetriNetUnfolderBase]: 2243/3499 cut-off events. [2023-11-19 07:55:12,693 INFO L125 PetriNetUnfolderBase]: For 23912/23949 co-relation queries the response was YES. [2023-11-19 07:55:12,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18588 conditions, 3499 events. 2243/3499 cut-off events. For 23912/23949 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 18892 event pairs, 607 based on Foata normal form. 54/3536 useless extension candidates. Maximal degree in co-relation 15499. Up to 1971 conditions per place. [2023-11-19 07:55:12,731 INFO L140 encePairwiseOnDemand]: 157/164 looper letters, 85 selfloop transitions, 73 changer transitions 4/163 dead transitions. [2023-11-19 07:55:12,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 163 transitions, 1967 flow [2023-11-19 07:55:12,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:55:12,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:55:12,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 450 transitions. [2023-11-19 07:55:12,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2023-11-19 07:55:12,734 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 450 transitions. [2023-11-19 07:55:12,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 450 transitions. [2023-11-19 07:55:12,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:12,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 450 transitions. [2023-11-19 07:55:12,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 90.0) internal successors, (450), 5 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:12,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:12,739 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:12,739 INFO L175 Difference]: Start difference. First operand has 70 places, 113 transitions, 1383 flow. Second operand 5 states and 450 transitions. [2023-11-19 07:55:12,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 163 transitions, 1967 flow [2023-11-19 07:55:12,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 163 transitions, 1881 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-11-19 07:55:12,821 INFO L231 Difference]: Finished difference. Result has 76 places, 115 transitions, 1551 flow [2023-11-19 07:55:12,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1551, PETRI_PLACES=76, PETRI_TRANSITIONS=115} [2023-11-19 07:55:12,824 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 45 predicate places. [2023-11-19 07:55:12,824 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 115 transitions, 1551 flow [2023-11-19 07:55:12,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:12,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:12,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:12,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:55:12,829 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:55:12,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:12,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1993226900, now seen corresponding path program 4 times [2023-11-19 07:55:12,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:12,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244659045] [2023-11-19 07:55:12,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:12,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:12,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:13,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:13,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:13,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244659045] [2023-11-19 07:55:13,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244659045] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:13,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635375465] [2023-11-19 07:55:13,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:55:13,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:13,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:13,087 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:13,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:55:13,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:55:13,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:13,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:55:13,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:13,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:13,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:14,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:14,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635375465] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:14,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:14,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-11-19 07:55:14,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266770470] [2023-11-19 07:55:14,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:14,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:55:14,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:14,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:55:14,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:55:14,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 164 [2023-11-19 07:55:14,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 115 transitions, 1551 flow. Second operand has 13 states, 13 states have (on average 75.6923076923077) internal successors, (984), 13 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:14,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:14,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 164 [2023-11-19 07:55:14,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:16,008 INFO L124 PetriNetUnfolderBase]: 3712/5753 cut-off events. [2023-11-19 07:55:16,009 INFO L125 PetriNetUnfolderBase]: For 38909/38940 co-relation queries the response was YES. [2023-11-19 07:55:16,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31534 conditions, 5753 events. 3712/5753 cut-off events. For 38909/38940 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 33049 event pairs, 175 based on Foata normal form. 94/5843 useless extension candidates. Maximal degree in co-relation 23622. Up to 1865 conditions per place. [2023-11-19 07:55:16,102 INFO L140 encePairwiseOnDemand]: 153/164 looper letters, 163 selfloop transitions, 161 changer transitions 19/344 dead transitions. [2023-11-19 07:55:16,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 344 transitions, 4118 flow [2023-11-19 07:55:16,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 07:55:16,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-19 07:55:16,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1352 transitions. [2023-11-19 07:55:16,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5152439024390244 [2023-11-19 07:55:16,110 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1352 transitions. [2023-11-19 07:55:16,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1352 transitions. [2023-11-19 07:55:16,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:16,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1352 transitions. [2023-11-19 07:55:16,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 84.5) internal successors, (1352), 16 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:16,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 164.0) internal successors, (2788), 17 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:16,125 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 164.0) internal successors, (2788), 17 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:16,125 INFO L175 Difference]: Start difference. First operand has 76 places, 115 transitions, 1551 flow. Second operand 16 states and 1352 transitions. [2023-11-19 07:55:16,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 344 transitions, 4118 flow [2023-11-19 07:55:16,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 344 transitions, 3988 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-19 07:55:16,367 INFO L231 Difference]: Finished difference. Result has 101 places, 198 transitions, 3199 flow [2023-11-19 07:55:16,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=1480, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3199, PETRI_PLACES=101, PETRI_TRANSITIONS=198} [2023-11-19 07:55:16,369 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 70 predicate places. [2023-11-19 07:55:16,369 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 198 transitions, 3199 flow [2023-11-19 07:55:16,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 75.6923076923077) internal successors, (984), 13 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:16,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:16,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:16,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:16,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:16,591 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:55:16,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:16,592 INFO L85 PathProgramCache]: Analyzing trace with hash -692074744, now seen corresponding path program 5 times [2023-11-19 07:55:16,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:16,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457132372] [2023-11-19 07:55:16,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:16,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:16,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:16,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:16,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457132372] [2023-11-19 07:55:16,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457132372] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:16,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:16,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:55:16,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364473104] [2023-11-19 07:55:16,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:16,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:55:16,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:16,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:55:16,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:55:16,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 164 [2023-11-19 07:55:16,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 198 transitions, 3199 flow. Second operand has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:16,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:16,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 164 [2023-11-19 07:55:16,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:18,704 INFO L124 PetriNetUnfolderBase]: 3971/6296 cut-off events. [2023-11-19 07:55:18,705 INFO L125 PetriNetUnfolderBase]: For 77141/77162 co-relation queries the response was YES. [2023-11-19 07:55:18,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42800 conditions, 6296 events. 3971/6296 cut-off events. For 77141/77162 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 37035 event pairs, 792 based on Foata normal form. 234/6526 useless extension candidates. Maximal degree in co-relation 37982. Up to 4066 conditions per place. [2023-11-19 07:55:18,806 INFO L140 encePairwiseOnDemand]: 158/164 looper letters, 178 selfloop transitions, 34 changer transitions 13/286 dead transitions. [2023-11-19 07:55:18,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 286 transitions, 4693 flow [2023-11-19 07:55:18,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:55:18,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:55:18,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 447 transitions. [2023-11-19 07:55:18,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5451219512195122 [2023-11-19 07:55:18,810 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 447 transitions. [2023-11-19 07:55:18,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 447 transitions. [2023-11-19 07:55:18,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:18,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 447 transitions. [2023-11-19 07:55:18,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 89.4) internal successors, (447), 5 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:18,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:18,816 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:18,816 INFO L175 Difference]: Start difference. First operand has 101 places, 198 transitions, 3199 flow. Second operand 5 states and 447 transitions. [2023-11-19 07:55:18,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 286 transitions, 4693 flow [2023-11-19 07:55:19,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 286 transitions, 4389 flow, removed 42 selfloop flow, removed 7 redundant places. [2023-11-19 07:55:19,128 INFO L231 Difference]: Finished difference. Result has 100 places, 213 transitions, 3283 flow [2023-11-19 07:55:19,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=2953, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3283, PETRI_PLACES=100, PETRI_TRANSITIONS=213} [2023-11-19 07:55:19,130 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 69 predicate places. [2023-11-19 07:55:19,130 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 213 transitions, 3283 flow [2023-11-19 07:55:19,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:19,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:19,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:19,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:55:19,132 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:55:19,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:19,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1369527852, now seen corresponding path program 6 times [2023-11-19 07:55:19,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:19,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444253739] [2023-11-19 07:55:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:19,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:19,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:19,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444253739] [2023-11-19 07:55:19,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444253739] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:19,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:19,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:55:19,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28232019] [2023-11-19 07:55:19,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:19,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:55:19,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:19,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:55:19,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:55:19,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 164 [2023-11-19 07:55:19,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 213 transitions, 3283 flow. Second operand has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:19,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:19,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 164 [2023-11-19 07:55:19,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:21,038 INFO L124 PetriNetUnfolderBase]: 4069/6490 cut-off events. [2023-11-19 07:55:21,039 INFO L125 PetriNetUnfolderBase]: For 78383/78411 co-relation queries the response was YES. [2023-11-19 07:55:21,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44669 conditions, 6490 events. 4069/6490 cut-off events. For 78383/78411 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 38837 event pairs, 830 based on Foata normal form. 25/6511 useless extension candidates. Maximal degree in co-relation 40053. Up to 5688 conditions per place. [2023-11-19 07:55:21,250 INFO L140 encePairwiseOnDemand]: 157/164 looper letters, 162 selfloop transitions, 24 changer transitions 26/273 dead transitions. [2023-11-19 07:55:21,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 273 transitions, 4208 flow [2023-11-19 07:55:21,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:55:21,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:55:21,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 526 transitions. [2023-11-19 07:55:21,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5345528455284553 [2023-11-19 07:55:21,253 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 526 transitions. [2023-11-19 07:55:21,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 526 transitions. [2023-11-19 07:55:21,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:21,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 526 transitions. [2023-11-19 07:55:21,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 87.66666666666667) internal successors, (526), 6 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:21,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:21,258 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:21,259 INFO L175 Difference]: Start difference. First operand has 100 places, 213 transitions, 3283 flow. Second operand 6 states and 526 transitions. [2023-11-19 07:55:21,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 273 transitions, 4208 flow [2023-11-19 07:55:21,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 273 transitions, 4179 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:55:21,451 INFO L231 Difference]: Finished difference. Result has 105 places, 215 transitions, 3359 flow [2023-11-19 07:55:21,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=3256, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3359, PETRI_PLACES=105, PETRI_TRANSITIONS=215} [2023-11-19 07:55:21,452 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 74 predicate places. [2023-11-19 07:55:21,452 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 215 transitions, 3359 flow [2023-11-19 07:55:21,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:21,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:21,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:21,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:55:21,453 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:55:21,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:21,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1578744680, now seen corresponding path program 7 times [2023-11-19 07:55:21,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:21,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878911477] [2023-11-19 07:55:21,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:21,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:21,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:21,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878911477] [2023-11-19 07:55:21,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878911477] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:21,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:21,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:55:21,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123681267] [2023-11-19 07:55:21,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:21,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:55:21,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:21,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:55:21,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:55:21,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 164 [2023-11-19 07:55:21,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 215 transitions, 3359 flow. Second operand has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:21,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:21,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 164 [2023-11-19 07:55:21,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:23,318 INFO L124 PetriNetUnfolderBase]: 3919/6143 cut-off events. [2023-11-19 07:55:23,318 INFO L125 PetriNetUnfolderBase]: For 78808/78930 co-relation queries the response was YES. [2023-11-19 07:55:23,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42983 conditions, 6143 events. 3919/6143 cut-off events. For 78808/78930 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 35391 event pairs, 801 based on Foata normal form. 50/6185 useless extension candidates. Maximal degree in co-relation 38752. Up to 5567 conditions per place. [2023-11-19 07:55:23,531 INFO L140 encePairwiseOnDemand]: 158/164 looper letters, 135 selfloop transitions, 17 changer transitions 14/227 dead transitions. [2023-11-19 07:55:23,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 227 transitions, 3686 flow [2023-11-19 07:55:23,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:55:23,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:55:23,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 426 transitions. [2023-11-19 07:55:23,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195121951219512 [2023-11-19 07:55:23,551 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 426 transitions. [2023-11-19 07:55:23,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 426 transitions. [2023-11-19 07:55:23,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:23,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 426 transitions. [2023-11-19 07:55:23,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 85.2) internal successors, (426), 5 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:23,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:23,556 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:23,556 INFO L175 Difference]: Start difference. First operand has 105 places, 215 transitions, 3359 flow. Second operand 5 states and 426 transitions. [2023-11-19 07:55:23,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 227 transitions, 3686 flow [2023-11-19 07:55:23,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 227 transitions, 3563 flow, removed 35 selfloop flow, removed 5 redundant places. [2023-11-19 07:55:23,874 INFO L231 Difference]: Finished difference. Result has 105 places, 208 transitions, 3156 flow [2023-11-19 07:55:23,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=3141, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3156, PETRI_PLACES=105, PETRI_TRANSITIONS=208} [2023-11-19 07:55:23,875 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 74 predicate places. [2023-11-19 07:55:23,875 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 208 transitions, 3156 flow [2023-11-19 07:55:23,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:23,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:23,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:23,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:55:23,876 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:55:23,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:23,877 INFO L85 PathProgramCache]: Analyzing trace with hash 309831880, now seen corresponding path program 1 times [2023-11-19 07:55:23,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:23,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879670565] [2023-11-19 07:55:23,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:23,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:24,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:24,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:24,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879670565] [2023-11-19 07:55:24,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879670565] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:24,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611147181] [2023-11-19 07:55:24,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:24,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:24,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:24,200 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:24,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:55:24,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:24,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:55:24,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:24,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:24,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:24,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:24,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611147181] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:24,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:24,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2023-11-19 07:55:24,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87682014] [2023-11-19 07:55:24,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:24,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:55:24,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:24,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:55:24,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:55:25,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 164 [2023-11-19 07:55:25,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 208 transitions, 3156 flow. Second operand has 12 states, 12 states have (on average 76.25) internal successors, (915), 12 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:25,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:25,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 164 [2023-11-19 07:55:25,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:27,256 INFO L124 PetriNetUnfolderBase]: 4835/7961 cut-off events. [2023-11-19 07:55:27,256 INFO L125 PetriNetUnfolderBase]: For 100994/101948 co-relation queries the response was YES. [2023-11-19 07:55:27,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55715 conditions, 7961 events. 4835/7961 cut-off events. For 100994/101948 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 52866 event pairs, 295 based on Foata normal form. 539/8431 useless extension candidates. Maximal degree in co-relation 49280. Up to 4719 conditions per place. [2023-11-19 07:55:27,372 INFO L140 encePairwiseOnDemand]: 157/164 looper letters, 348 selfloop transitions, 133 changer transitions 6/493 dead transitions. [2023-11-19 07:55:27,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 493 transitions, 8052 flow [2023-11-19 07:55:27,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:55:27,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-19 07:55:27,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 751 transitions. [2023-11-19 07:55:27,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088075880758808 [2023-11-19 07:55:27,377 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 751 transitions. [2023-11-19 07:55:27,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 751 transitions. [2023-11-19 07:55:27,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:27,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 751 transitions. [2023-11-19 07:55:27,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 83.44444444444444) internal successors, (751), 9 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:27,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 164.0) internal successors, (1640), 10 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:27,385 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 164.0) internal successors, (1640), 10 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:27,386 INFO L175 Difference]: Start difference. First operand has 105 places, 208 transitions, 3156 flow. Second operand 9 states and 751 transitions. [2023-11-19 07:55:27,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 493 transitions, 8052 flow [2023-11-19 07:55:27,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 493 transitions, 7815 flow, removed 90 selfloop flow, removed 6 redundant places. [2023-11-19 07:55:27,705 INFO L231 Difference]: Finished difference. Result has 107 places, 319 transitions, 5249 flow [2023-11-19 07:55:27,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=3027, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5249, PETRI_PLACES=107, PETRI_TRANSITIONS=319} [2023-11-19 07:55:27,706 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 76 predicate places. [2023-11-19 07:55:27,706 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 319 transitions, 5249 flow [2023-11-19 07:55:27,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 76.25) internal successors, (915), 12 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:27,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:27,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:27,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:27,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 07:55:27,908 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:55:27,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:27,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1320938546, now seen corresponding path program 2 times [2023-11-19 07:55:27,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:27,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156390561] [2023-11-19 07:55:27,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:27,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:28,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:28,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156390561] [2023-11-19 07:55:28,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156390561] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:28,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910454763] [2023-11-19 07:55:28,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:55:28,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:28,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:28,416 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:28,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:55:28,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:55:28,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:28,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:55:28,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:28,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:29,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910454763] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:29,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:29,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-19 07:55:29,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064266401] [2023-11-19 07:55:29,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:29,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:55:29,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:29,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:55:29,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:55:29,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 164 [2023-11-19 07:55:29,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 319 transitions, 5249 flow. Second operand has 9 states, 9 states have (on average 79.44444444444444) internal successors, (715), 9 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:29,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:29,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 164 [2023-11-19 07:55:29,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:31,716 INFO L124 PetriNetUnfolderBase]: 5445/9088 cut-off events. [2023-11-19 07:55:31,717 INFO L125 PetriNetUnfolderBase]: For 128106/129314 co-relation queries the response was YES. [2023-11-19 07:55:31,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65490 conditions, 9088 events. 5445/9088 cut-off events. For 128106/129314 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 63302 event pairs, 516 based on Foata normal form. 682/9680 useless extension candidates. Maximal degree in co-relation 60041. Up to 5770 conditions per place. [2023-11-19 07:55:31,835 INFO L140 encePairwiseOnDemand]: 158/164 looper letters, 252 selfloop transitions, 158 changer transitions 7/483 dead transitions. [2023-11-19 07:55:31,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 483 transitions, 8433 flow [2023-11-19 07:55:31,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:55:31,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:55:31,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 677 transitions. [2023-11-19 07:55:31,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5160060975609756 [2023-11-19 07:55:31,840 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 677 transitions. [2023-11-19 07:55:31,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 677 transitions. [2023-11-19 07:55:31,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:31,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 677 transitions. [2023-11-19 07:55:31,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 84.625) internal successors, (677), 8 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:31,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 164.0) internal successors, (1476), 9 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:31,848 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 164.0) internal successors, (1476), 9 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:31,848 INFO L175 Difference]: Start difference. First operand has 107 places, 319 transitions, 5249 flow. Second operand 8 states and 677 transitions. [2023-11-19 07:55:31,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 483 transitions, 8433 flow [2023-11-19 07:55:32,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 483 transitions, 7932 flow, removed 239 selfloop flow, removed 2 redundant places. [2023-11-19 07:55:32,255 INFO L231 Difference]: Finished difference. Result has 115 places, 401 transitions, 6789 flow [2023-11-19 07:55:32,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=4846, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6789, PETRI_PLACES=115, PETRI_TRANSITIONS=401} [2023-11-19 07:55:32,256 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 84 predicate places. [2023-11-19 07:55:32,257 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 401 transitions, 6789 flow [2023-11-19 07:55:32,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 79.44444444444444) internal successors, (715), 9 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:32,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:32,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:32,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:32,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 07:55:32,458 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:55:32,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:32,458 INFO L85 PathProgramCache]: Analyzing trace with hash 338299947, now seen corresponding path program 1 times [2023-11-19 07:55:32,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:32,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331936993] [2023-11-19 07:55:32,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:32,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:32,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:33,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:33,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:33,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331936993] [2023-11-19 07:55:33,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331936993] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:33,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770548037] [2023-11-19 07:55:33,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:33,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:33,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:33,052 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:33,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3adbdbe-5238-4f3f-86a8-d9feea8a17eb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:55:33,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:33,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:55:33,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:33,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:33,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:34,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:34,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770548037] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:34,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:34,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 20 [2023-11-19 07:55:34,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916634757] [2023-11-19 07:55:34,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:34,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:55:34,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:34,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:55:34,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:55:34,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 164 [2023-11-19 07:55:34,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 401 transitions, 6789 flow. Second operand has 21 states, 21 states have (on average 72.33333333333333) internal successors, (1519), 21 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:34,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:34,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 164 [2023-11-19 07:55:34,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:42,109 INFO L124 PetriNetUnfolderBase]: 10000/16103 cut-off events. [2023-11-19 07:55:42,110 INFO L125 PetriNetUnfolderBase]: For 244840/244852 co-relation queries the response was YES. [2023-11-19 07:55:42,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117301 conditions, 16103 events. 10000/16103 cut-off events. For 244840/244852 co-relation queries the response was YES. Maximal size of possible extension queue 928. Compared 114290 event pairs, 470 based on Foata normal form. 801/16903 useless extension candidates. Maximal degree in co-relation 111115. Up to 4123 conditions per place. [2023-11-19 07:55:42,400 INFO L140 encePairwiseOnDemand]: 153/164 looper letters, 682 selfloop transitions, 762 changer transitions 0/1445 dead transitions. [2023-11-19 07:55:42,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 1445 transitions, 23536 flow [2023-11-19 07:55:42,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-19 07:55:42,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-11-19 07:55:42,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 4308 transitions.