./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl --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 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:04:44,316 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:04:44,387 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:04:44,393 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:04:44,393 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:04:44,432 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:04:44,434 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:04:44,435 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:04:44,436 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:04:44,441 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:04:44,443 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:04:44,443 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:04:44,444 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:04:44,445 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:04:44,446 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:04:44,446 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:04:44,447 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:04:44,447 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:04:44,447 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:04:44,448 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:04:44,448 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:04:44,449 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:04:44,449 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:04:44,450 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:04:44,450 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:04:44,451 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:04:44,451 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:04:44,452 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:04:44,452 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:04:44,453 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:04:44,454 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:04:44,454 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:04:44,455 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:04:44,455 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:04:44,455 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:04:44,455 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:04:44,456 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:04:44,456 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:04:44,456 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:04:44,456 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_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e [2023-11-12 02:04:44,694 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:04:44,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:04:44,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:04:44,721 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:04:44,721 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:04:44,723 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2023-11-12 02:04:47,914 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:04:48,227 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:04:48,228 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2023-11-12 02:04:48,239 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/data/4f64b71f4/5266cc89e1e945a2985b6c2e4ef23506/FLAG8abebe95b [2023-11-12 02:04:48,261 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/data/4f64b71f4/5266cc89e1e945a2985b6c2e4ef23506 [2023-11-12 02:04:48,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:04:48,271 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:04:48,277 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:04:48,277 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:04:48,283 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:04:48,287 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:04:48" (1/1) ... [2023-11-12 02:04:48,288 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ea53cde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:48, skipping insertion in model container [2023-11-12 02:04:48,288 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:04:48" (1/1) ... [2023-11-12 02:04:48,323 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:04:48,552 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_735ce812-cf97-4208-b278-a4825e385309/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2722,2735] [2023-11-12 02:04:48,573 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:04:48,583 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:04:48,605 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_735ce812-cf97-4208-b278-a4825e385309/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2722,2735] [2023-11-12 02:04:48,608 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:04:48,617 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:04:48,617 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:04:48,625 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:04:48,627 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:48 WrapperNode [2023-11-12 02:04:48,627 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:04:48,633 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:04:48,633 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:04:48,633 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:04:48,642 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:48" (1/1) ... [2023-11-12 02:04:48,665 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:48" (1/1) ... [2023-11-12 02:04:48,693 INFO L138 Inliner]: procedures = 24, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 161 [2023-11-12 02:04:48,693 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:04:48,694 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:04:48,694 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:04:48,695 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:04:48,703 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:48" (1/1) ... [2023-11-12 02:04:48,703 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:48" (1/1) ... [2023-11-12 02:04:48,707 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:48" (1/1) ... [2023-11-12 02:04:48,707 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:48" (1/1) ... [2023-11-12 02:04:48,715 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:48" (1/1) ... [2023-11-12 02:04:48,720 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:48" (1/1) ... [2023-11-12 02:04:48,722 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:48" (1/1) ... [2023-11-12 02:04:48,724 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:48" (1/1) ... [2023-11-12 02:04:48,727 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:04:48,728 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:04:48,728 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:04:48,728 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:04:48,729 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:48" (1/1) ... [2023-11-12 02:04:48,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:04:48,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:48,769 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:04:48,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:04:48,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:04:48,814 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:04:48,814 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:04:48,814 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:04:48,814 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:04:48,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:04:48,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:04:48,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:04:48,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:04:48,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:04:48,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:04:48,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:04:48,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:04:48,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:04:48,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:04:48,818 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:04:48,935 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:04:48,937 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:04:49,271 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:04:49,427 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:04:49,427 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 02:04:49,430 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:04:49 BoogieIcfgContainer [2023-11-12 02:04:49,430 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:04:49,441 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:04:49,441 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:04:49,444 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:04:49,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:04:48" (1/3) ... [2023-11-12 02:04:49,445 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f65e0db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:04:49, skipping insertion in model container [2023-11-12 02:04:49,446 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:48" (2/3) ... [2023-11-12 02:04:49,447 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f65e0db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:04:49, skipping insertion in model container [2023-11-12 02:04:49,447 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:04:49" (3/3) ... [2023-11-12 02:04:49,449 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2023-11-12 02:04:49,458 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:04:49,469 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:04:49,470 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:04:49,470 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:04:49,569 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:04:49,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 140 transitions, 294 flow [2023-11-12 02:04:49,678 INFO L124 PetriNetUnfolderBase]: 11/138 cut-off events. [2023-11-12 02:04:49,678 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:04:49,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 138 events. 11/138 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 80 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 102. Up to 3 conditions per place. [2023-11-12 02:04:49,684 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 140 transitions, 294 flow [2023-11-12 02:04:49,690 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 129 transitions, 270 flow [2023-11-12 02:04:49,693 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:04:49,707 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 129 transitions, 270 flow [2023-11-12 02:04:49,710 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 129 transitions, 270 flow [2023-11-12 02:04:49,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 129 transitions, 270 flow [2023-11-12 02:04:49,753 INFO L124 PetriNetUnfolderBase]: 11/129 cut-off events. [2023-11-12 02:04:49,753 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:04:49,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 129 events. 11/129 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 102. Up to 3 conditions per place. [2023-11-12 02:04:49,756 INFO L119 LiptonReduction]: Number of co-enabled transitions 652 [2023-11-12 02:04:54,998 INFO L134 LiptonReduction]: Checked pairs total: 744 [2023-11-12 02:04:54,999 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-11-12 02:04:55,032 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:04:55,042 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;@5a8c4bc0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:04:55,042 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-12 02:04:55,059 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:04:55,060 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-12 02:04:55,060 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:04:55,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:04:55,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:04:55,062 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:04:55,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:55,067 INFO L85 PathProgramCache]: Analyzing trace with hash 935866931, now seen corresponding path program 1 times [2023-11-12 02:04:55,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:55,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253943236] [2023-11-12 02:04:55,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:55,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:55,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:04:55,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:55,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253943236] [2023-11-12 02:04:55,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253943236] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:04:55,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:04:55,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:04:55,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239065445] [2023-11-12 02:04:55,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:04:55,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:04:55,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:55,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:04:55,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:04:55,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 276 [2023-11-12 02:04:55,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:55,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:04:55,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 276 [2023-11-12 02:04:55,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:04:55,666 INFO L124 PetriNetUnfolderBase]: 48/86 cut-off events. [2023-11-12 02:04:55,666 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-12 02:04:55,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 86 events. 48/86 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 176 event pairs, 9 based on Foata normal form. 4/69 useless extension candidates. Maximal degree in co-relation 144. Up to 65 conditions per place. [2023-11-12 02:04:55,671 INFO L140 encePairwiseOnDemand]: 271/276 looper letters, 20 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-11-12 02:04:55,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 107 flow [2023-11-12 02:04:55,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:04:55,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:04:55,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 385 transitions. [2023-11-12 02:04:55,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46497584541062803 [2023-11-12 02:04:55,701 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 385 transitions. [2023-11-12 02:04:55,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 385 transitions. [2023-11-12 02:04:55,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:04:55,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 385 transitions. [2023-11-12 02:04:55,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:55,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:55,722 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:55,724 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 385 transitions. [2023-11-12 02:04:55,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 107 flow [2023-11-12 02:04:55,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 23 transitions, 97 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:04:55,731 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 59 flow [2023-11-12 02:04:55,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2023-11-12 02:04:55,740 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-12 02:04:55,740 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 59 flow [2023-11-12 02:04:55,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:55,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:04:55,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:04:55,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:04:55,743 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:04:55,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:55,744 INFO L85 PathProgramCache]: Analyzing trace with hash -336527803, now seen corresponding path program 2 times [2023-11-12 02:04:55,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:55,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248322021] [2023-11-12 02:04:55,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:55,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:04:55,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:55,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248322021] [2023-11-12 02:04:55,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248322021] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:04:55,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:04:55,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:04:55,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887179577] [2023-11-12 02:04:55,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:04:55,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:04:55,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:55,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:04:55,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:04:56,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 276 [2023-11-12 02:04:56,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 59 flow. Second operand has 4 states, 4 states have (on average 119.5) internal successors, (478), 4 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:56,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:04:56,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 276 [2023-11-12 02:04:56,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:04:56,078 INFO L124 PetriNetUnfolderBase]: 55/107 cut-off events. [2023-11-12 02:04:56,079 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-12 02:04:56,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 107 events. 55/107 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 233 event pairs, 32 based on Foata normal form. 6/91 useless extension candidates. Maximal degree in co-relation 90. Up to 87 conditions per place. [2023-11-12 02:04:56,081 INFO L140 encePairwiseOnDemand]: 271/276 looper letters, 18 selfloop transitions, 2 changer transitions 7/27 dead transitions. [2023-11-12 02:04:56,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 27 transitions, 131 flow [2023-11-12 02:04:56,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:04:56,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:04:56,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 491 transitions. [2023-11-12 02:04:56,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4447463768115942 [2023-11-12 02:04:56,084 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 491 transitions. [2023-11-12 02:04:56,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 491 transitions. [2023-11-12 02:04:56,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:04:56,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 491 transitions. [2023-11-12 02:04:56,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.75) internal successors, (491), 4 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:56,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 276.0) internal successors, (1380), 5 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:56,091 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 276.0) internal successors, (1380), 5 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:56,091 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 59 flow. Second operand 4 states and 491 transitions. [2023-11-12 02:04:56,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 27 transitions, 131 flow [2023-11-12 02:04:56,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 27 transitions, 128 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:04:56,094 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 72 flow [2023-11-12 02:04:56,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=24, PETRI_TRANSITIONS=20} [2023-11-12 02:04:56,095 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2023-11-12 02:04:56,095 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 72 flow [2023-11-12 02:04:56,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.5) internal successors, (478), 4 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:56,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:04:56,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:04:56,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:04:56,097 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:04:56,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:56,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1123211308, now seen corresponding path program 1 times [2023-11-12 02:04:56,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:56,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372766928] [2023-11-12 02:04:56,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:56,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:04:56,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:56,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372766928] [2023-11-12 02:04:56,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372766928] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:04:56,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:04:56,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:04:56,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201083246] [2023-11-12 02:04:56,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:04:56,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:04:56,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:56,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:04:56,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:04:56,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 276 [2023-11-12 02:04:56,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 20 transitions, 72 flow. Second operand has 7 states, 7 states have (on average 118.14285714285714) internal successors, (827), 7 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:56,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:04:56,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 276 [2023-11-12 02:04:56,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:04:56,557 INFO L124 PetriNetUnfolderBase]: 73/141 cut-off events. [2023-11-12 02:04:56,557 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-12 02:04:56,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 141 events. 73/141 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 387 event pairs, 23 based on Foata normal form. 1/107 useless extension candidates. Maximal degree in co-relation 366. Up to 69 conditions per place. [2023-11-12 02:04:56,560 INFO L140 encePairwiseOnDemand]: 269/276 looper letters, 33 selfloop transitions, 7 changer transitions 2/42 dead transitions. [2023-11-12 02:04:56,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 42 transitions, 218 flow [2023-11-12 02:04:56,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:04:56,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:04:56,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 738 transitions. [2023-11-12 02:04:56,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44565217391304346 [2023-11-12 02:04:56,564 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 738 transitions. [2023-11-12 02:04:56,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 738 transitions. [2023-11-12 02:04:56,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:04:56,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 738 transitions. [2023-11-12 02:04:56,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 123.0) internal successors, (738), 6 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:56,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 276.0) internal successors, (1932), 7 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:56,573 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 276.0) internal successors, (1932), 7 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:56,574 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 72 flow. Second operand 6 states and 738 transitions. [2023-11-12 02:04:56,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 42 transitions, 218 flow [2023-11-12 02:04:56,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 42 transitions, 210 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-12 02:04:56,576 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 92 flow [2023-11-12 02:04:56,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=92, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2023-11-12 02:04:56,577 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 6 predicate places. [2023-11-12 02:04:56,578 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 92 flow [2023-11-12 02:04:56,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 118.14285714285714) internal successors, (827), 7 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:56,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:04:56,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:04:56,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:04:56,580 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:04:56,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:56,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1350656426, now seen corresponding path program 1 times [2023-11-12 02:04:56,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:56,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370807769] [2023-11-12 02:04:56,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:56,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:56,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:04:56,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:56,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370807769] [2023-11-12 02:04:56,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370807769] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:04:56,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336979724] [2023-11-12 02:04:56,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:56,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:56,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:56,759 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:04:56,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:04:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:56,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:04:56,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:04:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:04:57,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:04:57,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:04:57,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336979724] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:04:57,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:04:57,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-12 02:04:57,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474555707] [2023-11-12 02:04:57,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:04:57,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:04:57,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:57,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:04:57,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:04:57,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 276 [2023-11-12 02:04:57,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 92 flow. Second operand has 12 states, 12 states have (on average 114.66666666666667) internal successors, (1376), 12 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:57,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:04:57,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 276 [2023-11-12 02:04:57,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:04:57,586 INFO L124 PetriNetUnfolderBase]: 112/231 cut-off events. [2023-11-12 02:04:57,586 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2023-11-12 02:04:57,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 667 conditions, 231 events. 112/231 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 800 event pairs, 59 based on Foata normal form. 12/231 useless extension candidates. Maximal degree in co-relation 390. Up to 141 conditions per place. [2023-11-12 02:04:57,590 INFO L140 encePairwiseOnDemand]: 271/276 looper letters, 37 selfloop transitions, 5 changer transitions 2/44 dead transitions. [2023-11-12 02:04:57,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 44 transitions, 263 flow [2023-11-12 02:04:57,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:04:57,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:04:57,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 712 transitions. [2023-11-12 02:04:57,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42995169082125606 [2023-11-12 02:04:57,594 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 712 transitions. [2023-11-12 02:04:57,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 712 transitions. [2023-11-12 02:04:57,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:04:57,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 712 transitions. [2023-11-12 02:04:57,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.66666666666667) internal successors, (712), 6 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:57,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 276.0) internal successors, (1932), 7 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:57,604 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 276.0) internal successors, (1932), 7 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:57,604 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 92 flow. Second operand 6 states and 712 transitions. [2023-11-12 02:04:57,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 44 transitions, 263 flow [2023-11-12 02:04:57,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 44 transitions, 251 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-12 02:04:57,608 INFO L231 Difference]: Finished difference. Result has 33 places, 25 transitions, 128 flow [2023-11-12 02:04:57,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=128, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2023-11-12 02:04:57,609 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 12 predicate places. [2023-11-12 02:04:57,609 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 128 flow [2023-11-12 02:04:57,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 114.66666666666667) internal successors, (1376), 12 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:57,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:04:57,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:04:57,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:04:57,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:57,820 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:04:57,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:57,821 INFO L85 PathProgramCache]: Analyzing trace with hash -847285227, now seen corresponding path program 1 times [2023-11-12 02:04:57,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:57,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873515284] [2023-11-12 02:04:57,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:57,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:57,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:04:57,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:57,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873515284] [2023-11-12 02:04:57,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873515284] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:04:57,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065838558] [2023-11-12 02:04:57,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:57,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:57,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:57,983 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:04:57,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:04:58,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:58,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:04:58,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:04:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:04:58,134 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:04:58,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065838558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:04:58,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:04:58,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-12 02:04:58,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813136629] [2023-11-12 02:04:58,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:04:58,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:04:58,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:58,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:04:58,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:04:58,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 276 [2023-11-12 02:04:58,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:58,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:04:58,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 276 [2023-11-12 02:04:58,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:04:58,252 INFO L124 PetriNetUnfolderBase]: 135/280 cut-off events. [2023-11-12 02:04:58,252 INFO L125 PetriNetUnfolderBase]: For 176/176 co-relation queries the response was YES. [2023-11-12 02:04:58,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 879 conditions, 280 events. 135/280 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1021 event pairs, 28 based on Foata normal form. 20/269 useless extension candidates. Maximal degree in co-relation 697. Up to 135 conditions per place. [2023-11-12 02:04:58,256 INFO L140 encePairwiseOnDemand]: 271/276 looper letters, 35 selfloop transitions, 9 changer transitions 4/48 dead transitions. [2023-11-12 02:04:58,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 48 transitions, 306 flow [2023-11-12 02:04:58,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:04:58,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:04:58,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 521 transitions. [2023-11-12 02:04:58,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47192028985507245 [2023-11-12 02:04:58,259 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 521 transitions. [2023-11-12 02:04:58,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 521 transitions. [2023-11-12 02:04:58,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:04:58,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 521 transitions. [2023-11-12 02:04:58,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.25) internal successors, (521), 4 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) [2023-11-12 02:04:58,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 276.0) internal successors, (1380), 5 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:58,264 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 276.0) internal successors, (1380), 5 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:58,264 INFO L175 Difference]: Start difference. First operand has 33 places, 25 transitions, 128 flow. Second operand 4 states and 521 transitions. [2023-11-12 02:04:58,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 48 transitions, 306 flow [2023-11-12 02:04:58,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 48 transitions, 283 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-11-12 02:04:58,270 INFO L231 Difference]: Finished difference. Result has 35 places, 28 transitions, 161 flow [2023-11-12 02:04:58,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=161, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2023-11-12 02:04:58,273 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-11-12 02:04:58,277 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 161 flow [2023-11-12 02:04:58,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:58,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:04:58,278 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:04:58,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:04:58,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:58,484 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:04:58,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:58,485 INFO L85 PathProgramCache]: Analyzing trace with hash 2106004613, now seen corresponding path program 2 times [2023-11-12 02:04:58,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:58,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052514482] [2023-11-12 02:04:58,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:58,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:59,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:04:59,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:59,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052514482] [2023-11-12 02:04:59,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052514482] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:04:59,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506422570] [2023-11-12 02:04:59,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:04:59,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:59,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:59,150 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:04:59,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:04:59,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:04:59,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:04:59,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 02:04:59,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:04:59,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:04:59,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:04:59,447 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-12 02:04:59,449 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-11-12 02:04:59,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:04:59,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506422570] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:04:59,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:04:59,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 3] total 11 [2023-11-12 02:04:59,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569259490] [2023-11-12 02:04:59,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:04:59,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:04:59,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:59,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:04:59,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:04:59,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 276 [2023-11-12 02:04:59,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 161 flow. Second operand has 12 states, 12 states have (on average 108.83333333333333) internal successors, (1306), 12 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:59,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:04:59,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 276 [2023-11-12 02:04:59,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:00,280 INFO L124 PetriNetUnfolderBase]: 176/329 cut-off events. [2023-11-12 02:05:00,280 INFO L125 PetriNetUnfolderBase]: For 303/303 co-relation queries the response was YES. [2023-11-12 02:05:00,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1214 conditions, 329 events. 176/329 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1184 event pairs, 30 based on Foata normal form. 16/291 useless extension candidates. Maximal degree in co-relation 1188. Up to 183 conditions per place. [2023-11-12 02:05:00,285 INFO L140 encePairwiseOnDemand]: 268/276 looper letters, 52 selfloop transitions, 16 changer transitions 0/68 dead transitions. [2023-11-12 02:05:00,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 68 transitions, 467 flow [2023-11-12 02:05:00,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:05:00,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-12 02:05:00,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1120 transitions. [2023-11-12 02:05:00,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057971014492754 [2023-11-12 02:05:00,291 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1120 transitions. [2023-11-12 02:05:00,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1120 transitions. [2023-11-12 02:05:00,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:00,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1120 transitions. [2023-11-12 02:05:00,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:00,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 276.0) internal successors, (3036), 11 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:00,303 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 276.0) internal successors, (3036), 11 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:00,303 INFO L175 Difference]: Start difference. First operand has 35 places, 28 transitions, 161 flow. Second operand 10 states and 1120 transitions. [2023-11-12 02:05:00,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 68 transitions, 467 flow [2023-11-12 02:05:00,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 68 transitions, 439 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-11-12 02:05:00,308 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 289 flow [2023-11-12 02:05:00,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=289, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2023-11-12 02:05:00,309 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-11-12 02:05:00,309 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 289 flow [2023-11-12 02:05:00,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 108.83333333333333) internal successors, (1306), 12 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:00,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:00,311 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:00,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:05:00,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:05:00,522 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:05:00,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:00,523 INFO L85 PathProgramCache]: Analyzing trace with hash -583090043, now seen corresponding path program 3 times [2023-11-12 02:05:00,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:00,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754691650] [2023-11-12 02:05:00,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:00,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:01,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:01,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754691650] [2023-11-12 02:05:01,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754691650] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:05:01,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501955062] [2023-11-12 02:05:01,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:05:01,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:01,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:01,281 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:01,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:05:01,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:05:01,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:05:01,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-12 02:05:01,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:01,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:05:01,652 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-12 02:05:01,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:01,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:05:01,962 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:05:01,965 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-11-12 02:05:01,974 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-11-12 02:05:02,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:02,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501955062] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:05:02,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:05:02,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-11-12 02:05:02,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298874831] [2023-11-12 02:05:02,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:05:02,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-12 02:05:02,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:02,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-12 02:05:02,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-11-12 02:05:03,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 276 [2023-11-12 02:05:03,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 289 flow. Second operand has 23 states, 23 states have (on average 100.8695652173913) internal successors, (2320), 23 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:03,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:03,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 276 [2023-11-12 02:05:03,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:05,050 INFO L124 PetriNetUnfolderBase]: 360/662 cut-off events. [2023-11-12 02:05:05,050 INFO L125 PetriNetUnfolderBase]: For 1251/1251 co-relation queries the response was YES. [2023-11-12 02:05:05,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2621 conditions, 662 events. 360/662 cut-off events. For 1251/1251 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2873 event pairs, 67 based on Foata normal form. 26/572 useless extension candidates. Maximal degree in co-relation 1791. Up to 284 conditions per place. [2023-11-12 02:05:05,058 INFO L140 encePairwiseOnDemand]: 268/276 looper letters, 90 selfloop transitions, 57 changer transitions 0/147 dead transitions. [2023-11-12 02:05:05,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 147 transitions, 1152 flow [2023-11-12 02:05:05,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-12 02:05:05,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-12 02:05:05,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2100 transitions. [2023-11-12 02:05:05,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3804347826086957 [2023-11-12 02:05:05,068 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2100 transitions. [2023-11-12 02:05:05,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2100 transitions. [2023-11-12 02:05:05,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:05,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2100 transitions. [2023-11-12 02:05:05,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 105.0) internal successors, (2100), 20 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:05,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 276.0) internal successors, (5796), 21 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:05,092 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 276.0) internal successors, (5796), 21 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:05,093 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 289 flow. Second operand 20 states and 2100 transitions. [2023-11-12 02:05:05,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 147 transitions, 1152 flow [2023-11-12 02:05:05,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 147 transitions, 1134 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-12 02:05:05,103 INFO L231 Difference]: Finished difference. Result has 68 places, 94 transitions, 923 flow [2023-11-12 02:05:05,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=923, PETRI_PLACES=68, PETRI_TRANSITIONS=94} [2023-11-12 02:05:05,104 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 47 predicate places. [2023-11-12 02:05:05,105 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 94 transitions, 923 flow [2023-11-12 02:05:05,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 100.8695652173913) internal successors, (2320), 23 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:05,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:05,106 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:05,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:05:05,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:05:05,312 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:05:05,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:05,312 INFO L85 PathProgramCache]: Analyzing trace with hash -990199342, now seen corresponding path program 4 times [2023-11-12 02:05:05,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:05,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506267613] [2023-11-12 02:05:05,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:05,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:05,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:06,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:06,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:06,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506267613] [2023-11-12 02:05:06,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506267613] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:05:06,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958135367] [2023-11-12 02:05:06,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:05:06,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:06,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:06,309 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:06,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:05:06,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:05:06,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:05:06,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-12 02:05:06,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:06,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:05:06,593 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-12 02:05:06,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:05:06,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:05:06,682 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_170 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_170) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) 0))) is different from false [2023-11-12 02:05:06,697 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:05:06,697 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-11-12 02:05:06,703 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-11-12 02:05:06,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:05:06,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958135367] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:05:06,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:05:06,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 17 [2023-11-12 02:05:06,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064961659] [2023-11-12 02:05:06,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:05:06,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 02:05:06,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:06,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 02:05:06,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=229, Unknown=1, NotChecked=30, Total=306 [2023-11-12 02:05:06,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 276 [2023-11-12 02:05:06,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 94 transitions, 923 flow. Second operand has 18 states, 18 states have (on average 91.38888888888889) internal successors, (1645), 18 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:06,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:06,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 276 [2023-11-12 02:05:06,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:07,661 INFO L124 PetriNetUnfolderBase]: 439/791 cut-off events. [2023-11-12 02:05:07,661 INFO L125 PetriNetUnfolderBase]: For 2791/2791 co-relation queries the response was YES. [2023-11-12 02:05:07,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3749 conditions, 791 events. 439/791 cut-off events. For 2791/2791 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3555 event pairs, 59 based on Foata normal form. 16/687 useless extension candidates. Maximal degree in co-relation 3322. Up to 312 conditions per place. [2023-11-12 02:05:07,704 INFO L140 encePairwiseOnDemand]: 269/276 looper letters, 98 selfloop transitions, 38 changer transitions 0/136 dead transitions. [2023-11-12 02:05:07,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 136 transitions, 1462 flow [2023-11-12 02:05:07,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:05:07,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-12 02:05:07,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1128 transitions. [2023-11-12 02:05:07,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34057971014492755 [2023-11-12 02:05:07,713 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1128 transitions. [2023-11-12 02:05:07,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1128 transitions. [2023-11-12 02:05:07,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:07,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1128 transitions. [2023-11-12 02:05:07,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 94.0) internal successors, (1128), 12 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:07,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 276.0) internal successors, (3588), 13 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:07,726 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 276.0) internal successors, (3588), 13 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:07,726 INFO L175 Difference]: Start difference. First operand has 68 places, 94 transitions, 923 flow. Second operand 12 states and 1128 transitions. [2023-11-12 02:05:07,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 136 transitions, 1462 flow [2023-11-12 02:05:07,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 136 transitions, 1218 flow, removed 114 selfloop flow, removed 7 redundant places. [2023-11-12 02:05:07,749 INFO L231 Difference]: Finished difference. Result has 75 places, 104 transitions, 942 flow [2023-11-12 02:05:07,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=942, PETRI_PLACES=75, PETRI_TRANSITIONS=104} [2023-11-12 02:05:07,752 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 54 predicate places. [2023-11-12 02:05:07,752 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 104 transitions, 942 flow [2023-11-12 02:05:07,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 91.38888888888889) internal successors, (1645), 18 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:07,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:07,753 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:07,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:05:07,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 02:05:07,960 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:05:07,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:07,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1882915592, now seen corresponding path program 1 times [2023-11-12 02:05:07,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:07,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765971835] [2023-11-12 02:05:07,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:07,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:08,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:08,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:08,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:08,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765971835] [2023-11-12 02:05:08,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765971835] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:05:08,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535357897] [2023-11-12 02:05:08,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:08,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:08,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:08,755 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:08,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:05:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:08,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-12 02:05:08,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:09,314 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-12 02:05:09,315 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-11-12 02:05:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:09,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:05:09,530 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:05:09,530 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2023-11-12 02:05:09,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:09,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535357897] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:05:09,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:05:09,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 24 [2023-11-12 02:05:09,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749499838] [2023-11-12 02:05:09,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:05:09,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-12 02:05:09,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:09,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-12 02:05:09,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2023-11-12 02:05:11,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 276 [2023-11-12 02:05:11,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 104 transitions, 942 flow. Second operand has 26 states, 26 states have (on average 98.0) internal successors, (2548), 26 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:11,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:11,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 276 [2023-11-12 02:05:11,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:12,548 INFO L124 PetriNetUnfolderBase]: 507/956 cut-off events. [2023-11-12 02:05:12,548 INFO L125 PetriNetUnfolderBase]: For 3462/3462 co-relation queries the response was YES. [2023-11-12 02:05:12,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4274 conditions, 956 events. 507/956 cut-off events. For 3462/3462 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4842 event pairs, 47 based on Foata normal form. 3/869 useless extension candidates. Maximal degree in co-relation 3782. Up to 494 conditions per place. [2023-11-12 02:05:12,561 INFO L140 encePairwiseOnDemand]: 266/276 looper letters, 122 selfloop transitions, 66 changer transitions 6/194 dead transitions. [2023-11-12 02:05:12,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 194 transitions, 1781 flow [2023-11-12 02:05:12,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-12 02:05:12,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-12 02:05:12,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1946 transitions. [2023-11-12 02:05:12,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3710907704042716 [2023-11-12 02:05:12,570 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1946 transitions. [2023-11-12 02:05:12,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1946 transitions. [2023-11-12 02:05:12,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:12,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1946 transitions. [2023-11-12 02:05:12,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 102.42105263157895) internal successors, (1946), 19 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:12,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 276.0) internal successors, (5520), 20 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:12,589 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 276.0) internal successors, (5520), 20 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:12,590 INFO L175 Difference]: Start difference. First operand has 75 places, 104 transitions, 942 flow. Second operand 19 states and 1946 transitions. [2023-11-12 02:05:12,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 194 transitions, 1781 flow [2023-11-12 02:05:12,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 194 transitions, 1664 flow, removed 17 selfloop flow, removed 7 redundant places. [2023-11-12 02:05:12,629 INFO L231 Difference]: Finished difference. Result has 93 places, 128 transitions, 1300 flow [2023-11-12 02:05:12,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1300, PETRI_PLACES=93, PETRI_TRANSITIONS=128} [2023-11-12 02:05:12,630 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 72 predicate places. [2023-11-12 02:05:12,631 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 128 transitions, 1300 flow [2023-11-12 02:05:12,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 98.0) internal successors, (2548), 26 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:12,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:12,633 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:12,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:05:12,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:12,839 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:05:12,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:12,839 INFO L85 PathProgramCache]: Analyzing trace with hash 850600886, now seen corresponding path program 2 times [2023-11-12 02:05:12,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:12,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805288056] [2023-11-12 02:05:12,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:12,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:12,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:13,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:13,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:13,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805288056] [2023-11-12 02:05:13,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805288056] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:05:13,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34835233] [2023-11-12 02:05:13,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:05:13,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:13,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:13,562 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:13,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:05:13,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:05:13,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:05:13,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-12 02:05:13,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:13,943 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-11-12 02:05:14,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:14,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:05:14,203 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:05:14,204 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2023-11-12 02:05:14,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:14,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34835233] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:05:14,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:05:14,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 24 [2023-11-12 02:05:14,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749742781] [2023-11-12 02:05:14,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:05:14,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-12 02:05:14,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:14,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-12 02:05:14,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2023-11-12 02:05:15,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 276 [2023-11-12 02:05:15,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 128 transitions, 1300 flow. Second operand has 26 states, 26 states have (on average 96.92307692307692) internal successors, (2520), 26 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:15,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:15,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 276 [2023-11-12 02:05:15,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:18,008 INFO L124 PetriNetUnfolderBase]: 732/1384 cut-off events. [2023-11-12 02:05:18,008 INFO L125 PetriNetUnfolderBase]: For 5995/5995 co-relation queries the response was YES. [2023-11-12 02:05:18,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6752 conditions, 1384 events. 732/1384 cut-off events. For 5995/5995 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 7778 event pairs, 74 based on Foata normal form. 11/1316 useless extension candidates. Maximal degree in co-relation 6554. Up to 832 conditions per place. [2023-11-12 02:05:18,027 INFO L140 encePairwiseOnDemand]: 266/276 looper letters, 153 selfloop transitions, 97 changer transitions 49/299 dead transitions. [2023-11-12 02:05:18,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 299 transitions, 3086 flow [2023-11-12 02:05:18,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-12 02:05:18,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-12 02:05:18,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3017 transitions. [2023-11-12 02:05:18,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3643719806763285 [2023-11-12 02:05:18,039 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3017 transitions. [2023-11-12 02:05:18,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3017 transitions. [2023-11-12 02:05:18,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:18,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3017 transitions. [2023-11-12 02:05:18,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 100.56666666666666) internal successors, (3017), 30 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:18,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 276.0) internal successors, (8556), 31 states have internal predecessors, (8556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:18,067 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 276.0) internal successors, (8556), 31 states have internal predecessors, (8556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:18,068 INFO L175 Difference]: Start difference. First operand has 93 places, 128 transitions, 1300 flow. Second operand 30 states and 3017 transitions. [2023-11-12 02:05:18,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 299 transitions, 3086 flow [2023-11-12 02:05:18,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 299 transitions, 2998 flow, removed 38 selfloop flow, removed 4 redundant places. [2023-11-12 02:05:18,118 INFO L231 Difference]: Finished difference. Result has 135 places, 185 transitions, 2240 flow [2023-11-12 02:05:18,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=1246, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2240, PETRI_PLACES=135, PETRI_TRANSITIONS=185} [2023-11-12 02:05:18,119 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 114 predicate places. [2023-11-12 02:05:18,119 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 185 transitions, 2240 flow [2023-11-12 02:05:18,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 96.92307692307692) internal successors, (2520), 26 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:18,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:18,121 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:18,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:05:18,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:05:18,327 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:05:18,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:18,328 INFO L85 PathProgramCache]: Analyzing trace with hash -951141536, now seen corresponding path program 3 times [2023-11-12 02:05:18,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:18,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226376014] [2023-11-12 02:05:18,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:18,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:19,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:19,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226376014] [2023-11-12 02:05:19,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226376014] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:05:19,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921616316] [2023-11-12 02:05:19,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:05:19,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:19,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:19,164 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:19,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:05:19,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:05:19,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:05:19,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-12 02:05:19,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:19,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:05:19,668 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-12 02:05:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:19,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:05:20,117 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:05:20,117 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 42 [2023-11-12 02:05:20,138 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-12 02:05:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:20,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921616316] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:05:20,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:05:20,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 27 [2023-11-12 02:05:20,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671429298] [2023-11-12 02:05:20,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:05:20,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-12 02:05:20,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:20,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-12 02:05:20,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=718, Unknown=1, NotChecked=0, Total=812 [2023-11-12 02:05:23,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-12 02:05:23,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 276 [2023-11-12 02:05:23,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 185 transitions, 2240 flow. Second operand has 29 states, 29 states have (on average 78.75862068965517) internal successors, (2284), 29 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:23,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:23,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 276 [2023-11-12 02:05:23,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:29,336 INFO L124 PetriNetUnfolderBase]: 1017/1983 cut-off events. [2023-11-12 02:05:29,337 INFO L125 PetriNetUnfolderBase]: For 15965/15965 co-relation queries the response was YES. [2023-11-12 02:05:29,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10895 conditions, 1983 events. 1017/1983 cut-off events. For 15965/15965 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 12470 event pairs, 140 based on Foata normal form. 58/1962 useless extension candidates. Maximal degree in co-relation 10744. Up to 822 conditions per place. [2023-11-12 02:05:29,365 INFO L140 encePairwiseOnDemand]: 262/276 looper letters, 203 selfloop transitions, 103 changer transitions 130/436 dead transitions. [2023-11-12 02:05:29,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 436 transitions, 5079 flow [2023-11-12 02:05:29,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-12 02:05:29,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-12 02:05:29,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3386 transitions. [2023-11-12 02:05:29,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29922234004948745 [2023-11-12 02:05:29,381 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3386 transitions. [2023-11-12 02:05:29,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3386 transitions. [2023-11-12 02:05:29,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:29,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3386 transitions. [2023-11-12 02:05:29,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 82.58536585365853) internal successors, (3386), 41 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:29,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 276.0) internal successors, (11592), 42 states have internal predecessors, (11592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:29,422 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 276.0) internal successors, (11592), 42 states have internal predecessors, (11592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:29,422 INFO L175 Difference]: Start difference. First operand has 135 places, 185 transitions, 2240 flow. Second operand 41 states and 3386 transitions. [2023-11-12 02:05:29,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 436 transitions, 5079 flow [2023-11-12 02:05:29,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 436 transitions, 4832 flow, removed 109 selfloop flow, removed 16 redundant places. [2023-11-12 02:05:29,573 INFO L231 Difference]: Finished difference. Result has 175 places, 213 transitions, 2826 flow [2023-11-12 02:05:29,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=2068, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=2826, PETRI_PLACES=175, PETRI_TRANSITIONS=213} [2023-11-12 02:05:29,574 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 154 predicate places. [2023-11-12 02:05:29,574 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 213 transitions, 2826 flow [2023-11-12 02:05:29,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 78.75862068965517) internal successors, (2284), 29 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:29,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:29,575 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:29,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:05:29,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:29,781 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:05:29,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:29,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1685215500, now seen corresponding path program 4 times [2023-11-12 02:05:29,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:29,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121039960] [2023-11-12 02:05:29,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:29,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:30,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:30,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121039960] [2023-11-12 02:05:30,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121039960] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:05:30,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107029963] [2023-11-12 02:05:30,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:05:30,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:30,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:30,710 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:30,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_735ce812-cf97-4208-b278-a4825e385309/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:05:30,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:05:30,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:05:30,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-12 02:05:30,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:31,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:05:31,121 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-12 02:05:31,279 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-11-12 02:05:31,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:31,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:05:31,608 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:05:31,609 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 42 [2023-11-12 02:05:31,642 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-12 02:05:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:32,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107029963] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:05:32,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:05:32,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 27 [2023-11-12 02:05:32,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601085988] [2023-11-12 02:05:32,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:05:32,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-12 02:05:32,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:32,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-12 02:05:32,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=703, Unknown=1, NotChecked=0, Total=812 [2023-11-12 02:05:32,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 276 [2023-11-12 02:05:32,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 213 transitions, 2826 flow. Second operand has 29 states, 29 states have (on average 78.79310344827586) internal successors, (2285), 29 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:32,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:32,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 276 [2023-11-12 02:05:32,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand