./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2d41b1dc1d5d7eec1f1fd4e3cbbef0194aa2dded6486a15b383e9bb8fe1468a3 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:00:31,125 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:00:31,202 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:00:31,208 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:00:31,209 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:00:31,249 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:00:31,251 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:00:31,252 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:00:31,253 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:00:31,259 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:00:31,260 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:00:31,260 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:00:31,261 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:00:31,263 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:00:31,263 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:00:31,264 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:00:31,264 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:00:31,265 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:00:31,265 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:00:31,266 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:00:31,266 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:00:31,267 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:00:31,268 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:00:31,268 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:00:31,269 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:00:31,270 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:00:31,270 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:00:31,271 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:00:31,271 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:00:31,272 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:00:31,273 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:00:31,273 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:00:31,274 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:00:31,274 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:00:31,274 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:00:31,275 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:00:31,275 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:00:31,275 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:00:31,284 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:00:31,284 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_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d41b1dc1d5d7eec1f1fd4e3cbbef0194aa2dded6486a15b383e9bb8fe1468a3 [2023-11-19 08:00:31,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:00:31,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:00:31,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:00:31,595 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:00:31,596 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:00:31,597 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2023-11-19 08:00:34,925 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:00:35,178 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:00:35,179 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2023-11-19 08:00:35,189 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/data/952f3197d/9d3d453631cb4848bf1350688d3ec2b6/FLAGabe99f8a4 [2023-11-19 08:00:35,206 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/data/952f3197d/9d3d453631cb4848bf1350688d3ec2b6 [2023-11-19 08:00:35,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:00:35,211 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:00:35,213 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:00:35,213 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:00:35,219 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:00:35,220 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:35" (1/1) ... [2023-11-19 08:00:35,222 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@171daa37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:35, skipping insertion in model container [2023-11-19 08:00:35,222 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:35" (1/1) ... [2023-11-19 08:00:35,268 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:00:35,479 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_52a0600d-ced1-4737-8dab-49fda73a13a4/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c[3822,3835] [2023-11-19 08:00:35,492 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:00:35,504 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:00:35,534 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_52a0600d-ced1-4737-8dab-49fda73a13a4/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c[3822,3835] [2023-11-19 08:00:35,541 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:00:35,551 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:00:35,551 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:00:35,558 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:00:35,559 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:35 WrapperNode [2023-11-19 08:00:35,559 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:00:35,560 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:00:35,561 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:00:35,561 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:00:35,569 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:35" (1/1) ... [2023-11-19 08:00:35,579 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:35" (1/1) ... [2023-11-19 08:00:35,616 INFO L138 Inliner]: procedures = 27, calls = 73, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 260 [2023-11-19 08:00:35,616 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:00:35,617 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:00:35,617 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:00:35,617 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:00:35,628 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:35" (1/1) ... [2023-11-19 08:00:35,628 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:35" (1/1) ... [2023-11-19 08:00:35,633 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:35" (1/1) ... [2023-11-19 08:00:35,634 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:35" (1/1) ... [2023-11-19 08:00:35,646 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:35" (1/1) ... [2023-11-19 08:00:35,651 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:35" (1/1) ... [2023-11-19 08:00:35,654 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:35" (1/1) ... [2023-11-19 08:00:35,657 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:35" (1/1) ... [2023-11-19 08:00:35,662 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:00:35,663 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:00:35,663 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:00:35,664 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:00:35,665 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:35" (1/1) ... [2023-11-19 08:00:35,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:00:35,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:35,714 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:00:35,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:00:35,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:00:35,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:00:35,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:00:35,751 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:00:35,751 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 08:00:35,751 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 08:00:35,751 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 08:00:35,751 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 08:00:35,752 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 08:00:35,752 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 08:00:35,752 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-19 08:00:35,752 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-19 08:00:35,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:00:35,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 08:00:35,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 08:00:35,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 08:00:35,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:00:35,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:00:35,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:00:35,755 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 08:00:35,887 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:00:35,890 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:00:36,438 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:00:36,717 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:00:36,717 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 08:00:36,722 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:00:36 BoogieIcfgContainer [2023-11-19 08:00:36,722 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:00:36,725 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:00:36,726 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:00:36,729 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:00:36,729 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:00:35" (1/3) ... [2023-11-19 08:00:36,730 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@437109c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:00:36, skipping insertion in model container [2023-11-19 08:00:36,730 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:35" (2/3) ... [2023-11-19 08:00:36,731 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@437109c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:00:36, skipping insertion in model container [2023-11-19 08:00:36,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:00:36" (3/3) ... [2023-11-19 08:00:36,732 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-equiv.wvr.c [2023-11-19 08:00:36,742 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 08:00:36,753 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:00:36,753 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:00:36,753 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:00:36,906 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-11-19 08:00:36,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 218 transitions, 476 flow [2023-11-19 08:00:37,078 INFO L124 PetriNetUnfolderBase]: 14/203 cut-off events. [2023-11-19 08:00:37,078 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 08:00:37,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 203 events. 14/203 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 180 event pairs, 0 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 173. Up to 3 conditions per place. [2023-11-19 08:00:37,086 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 218 transitions, 476 flow [2023-11-19 08:00:37,093 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 194 transitions, 418 flow [2023-11-19 08:00:37,098 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:00:37,108 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 194 transitions, 418 flow [2023-11-19 08:00:37,114 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 194 transitions, 418 flow [2023-11-19 08:00:37,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 194 transitions, 418 flow [2023-11-19 08:00:37,205 INFO L124 PetriNetUnfolderBase]: 14/194 cut-off events. [2023-11-19 08:00:37,205 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 08:00:37,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 194 events. 14/194 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 180 event pairs, 0 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 173. Up to 3 conditions per place. [2023-11-19 08:00:37,216 INFO L119 LiptonReduction]: Number of co-enabled transitions 3204 [2023-11-19 08:00:44,218 INFO L134 LiptonReduction]: Checked pairs total: 8299 [2023-11-19 08:00:44,219 INFO L136 LiptonReduction]: Total number of compositions: 181 [2023-11-19 08:00:44,235 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:00:44,246 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;@53990d8d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:00:44,246 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 08:00:44,269 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:00:44,269 INFO L124 PetriNetUnfolderBase]: 6/40 cut-off events. [2023-11-19 08:00:44,269 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 08:00:44,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:44,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:44,272 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-19 08:00:44,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:44,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1086305953, now seen corresponding path program 1 times [2023-11-19 08:00:44,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:44,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765363474] [2023-11-19 08:00:44,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:44,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:44,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:44,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:44,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765363474] [2023-11-19 08:00:44,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765363474] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:44,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:44,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:00:44,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937146022] [2023-11-19 08:00:44,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:44,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:00:44,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:44,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:00:44,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:00:44,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 401 [2023-11-19 08:00:44,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 187.5) internal successors, (750), 4 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:44,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:44,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 401 [2023-11-19 08:00:44,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:45,598 INFO L124 PetriNetUnfolderBase]: 2065/2970 cut-off events. [2023-11-19 08:00:45,599 INFO L125 PetriNetUnfolderBase]: For 350/363 co-relation queries the response was YES. [2023-11-19 08:00:45,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6247 conditions, 2970 events. 2065/2970 cut-off events. For 350/363 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 14179 event pairs, 560 based on Foata normal form. 5/2228 useless extension candidates. Maximal degree in co-relation 6146. Up to 1592 conditions per place. [2023-11-19 08:00:45,631 INFO L140 encePairwiseOnDemand]: 395/401 looper letters, 67 selfloop transitions, 7 changer transitions 1/86 dead transitions. [2023-11-19 08:00:45,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 86 transitions, 400 flow [2023-11-19 08:00:45,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:00:45,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:00:45,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 804 transitions. [2023-11-19 08:00:45,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5012468827930174 [2023-11-19 08:00:45,659 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 804 transitions. [2023-11-19 08:00:45,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 804 transitions. [2023-11-19 08:00:45,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:45,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 804 transitions. [2023-11-19 08:00:45,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:45,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 401.0) internal successors, (2005), 5 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:45,687 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 401.0) internal successors, (2005), 5 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:45,689 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 112 flow. Second operand 4 states and 804 transitions. [2023-11-19 08:00:45,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 86 transitions, 400 flow [2023-11-19 08:00:45,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 86 transitions, 348 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-19 08:00:45,705 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 137 flow [2023-11-19 08:00:45,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2023-11-19 08:00:45,713 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-11-19 08:00:45,714 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 137 flow [2023-11-19 08:00:45,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 187.5) internal successors, (750), 4 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:45,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:45,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:45,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:00:45,716 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-19 08:00:45,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:45,718 INFO L85 PathProgramCache]: Analyzing trace with hash -2024639931, now seen corresponding path program 2 times [2023-11-19 08:00:45,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:45,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317092175] [2023-11-19 08:00:45,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:45,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:45,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:45,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:45,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317092175] [2023-11-19 08:00:45,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317092175] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:45,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:45,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:00:45,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481281472] [2023-11-19 08:00:45,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:45,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:00:45,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:45,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:00:45,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:00:45,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 401 [2023-11-19 08:00:45,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 187.5) internal successors, (750), 4 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:45,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:45,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 401 [2023-11-19 08:00:45,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:46,728 INFO L124 PetriNetUnfolderBase]: 2963/4265 cut-off events. [2023-11-19 08:00:46,728 INFO L125 PetriNetUnfolderBase]: For 878/878 co-relation queries the response was YES. [2023-11-19 08:00:46,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9796 conditions, 4265 events. 2963/4265 cut-off events. For 878/878 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 21457 event pairs, 1180 based on Foata normal form. 1/3475 useless extension candidates. Maximal degree in co-relation 5023. Up to 2386 conditions per place. [2023-11-19 08:00:46,770 INFO L140 encePairwiseOnDemand]: 395/401 looper letters, 71 selfloop transitions, 8 changer transitions 1/91 dead transitions. [2023-11-19 08:00:46,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 91 transitions, 420 flow [2023-11-19 08:00:46,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:00:46,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:00:46,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 803 transitions. [2023-11-19 08:00:46,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5006234413965087 [2023-11-19 08:00:46,779 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 803 transitions. [2023-11-19 08:00:46,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 803 transitions. [2023-11-19 08:00:46,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:46,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 803 transitions. [2023-11-19 08:00:46,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 200.75) internal successors, (803), 4 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:46,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 401.0) internal successors, (2005), 5 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:46,792 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 401.0) internal successors, (2005), 5 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:46,792 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 137 flow. Second operand 4 states and 803 transitions. [2023-11-19 08:00:46,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 91 transitions, 420 flow [2023-11-19 08:00:46,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 91 transitions, 420 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:00:46,804 INFO L231 Difference]: Finished difference. Result has 50 places, 52 transitions, 197 flow [2023-11-19 08:00:46,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=197, PETRI_PLACES=50, PETRI_TRANSITIONS=52} [2023-11-19 08:00:46,806 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 2 predicate places. [2023-11-19 08:00:46,806 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 52 transitions, 197 flow [2023-11-19 08:00:46,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 187.5) internal successors, (750), 4 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:46,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:46,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:46,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:00:46,808 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-19 08:00:46,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:46,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1999301119, now seen corresponding path program 1 times [2023-11-19 08:00:46,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:46,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645648932] [2023-11-19 08:00:46,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:46,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:46,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:47,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:47,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:47,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645648932] [2023-11-19 08:00:47,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645648932] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:47,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:47,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:00:47,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082875803] [2023-11-19 08:00:47,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:47,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:00:47,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:47,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:00:47,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:00:47,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 401 [2023-11-19 08:00:47,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 52 transitions, 197 flow. Second operand has 5 states, 5 states have (on average 178.6) internal successors, (893), 5 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:47,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:47,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 401 [2023-11-19 08:00:47,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:48,218 INFO L124 PetriNetUnfolderBase]: 4815/7067 cut-off events. [2023-11-19 08:00:48,219 INFO L125 PetriNetUnfolderBase]: For 4906/4906 co-relation queries the response was YES. [2023-11-19 08:00:48,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17384 conditions, 7067 events. 4815/7067 cut-off events. For 4906/4906 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 39660 event pairs, 2542 based on Foata normal form. 212/5926 useless extension candidates. Maximal degree in co-relation 10610. Up to 3994 conditions per place. [2023-11-19 08:00:48,325 INFO L140 encePairwiseOnDemand]: 396/401 looper letters, 90 selfloop transitions, 5 changer transitions 0/106 dead transitions. [2023-11-19 08:00:48,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 106 transitions, 578 flow [2023-11-19 08:00:48,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:00:48,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:00:48,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 948 transitions. [2023-11-19 08:00:48,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47281795511221947 [2023-11-19 08:00:48,331 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 948 transitions. [2023-11-19 08:00:48,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 948 transitions. [2023-11-19 08:00:48,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:48,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 948 transitions. [2023-11-19 08:00:48,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 189.6) internal successors, (948), 5 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:48,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 401.0) internal successors, (2406), 6 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:48,344 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 401.0) internal successors, (2406), 6 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:48,344 INFO L175 Difference]: Start difference. First operand has 50 places, 52 transitions, 197 flow. Second operand 5 states and 948 transitions. [2023-11-19 08:00:48,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 106 transitions, 578 flow [2023-11-19 08:00:48,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 106 transitions, 576 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-19 08:00:48,356 INFO L231 Difference]: Finished difference. Result has 57 places, 56 transitions, 247 flow [2023-11-19 08:00:48,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=247, PETRI_PLACES=57, PETRI_TRANSITIONS=56} [2023-11-19 08:00:48,357 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 9 predicate places. [2023-11-19 08:00:48,358 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 56 transitions, 247 flow [2023-11-19 08:00:48,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 178.6) internal successors, (893), 5 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:48,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:48,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:48,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:00:48,360 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-19 08:00:48,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:48,361 INFO L85 PathProgramCache]: Analyzing trace with hash 176346997, now seen corresponding path program 1 times [2023-11-19 08:00:48,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:48,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686022665] [2023-11-19 08:00:48,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:48,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:48,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:48,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686022665] [2023-11-19 08:00:48,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686022665] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:48,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:48,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:00:48,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140158847] [2023-11-19 08:00:48,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:48,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:00:48,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:48,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:00:48,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:00:48,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 401 [2023-11-19 08:00:48,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 247 flow. Second operand has 5 states, 5 states have (on average 178.8) internal successors, (894), 5 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:48,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:48,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 401 [2023-11-19 08:00:48,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:49,441 INFO L124 PetriNetUnfolderBase]: 3320/5013 cut-off events. [2023-11-19 08:00:49,441 INFO L125 PetriNetUnfolderBase]: For 4733/4733 co-relation queries the response was YES. [2023-11-19 08:00:49,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12687 conditions, 5013 events. 3320/5013 cut-off events. For 4733/4733 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27041 event pairs, 2160 based on Foata normal form. 0/4159 useless extension candidates. Maximal degree in co-relation 11117. Up to 3994 conditions per place. [2023-11-19 08:00:49,498 INFO L140 encePairwiseOnDemand]: 395/401 looper letters, 40 selfloop transitions, 2 changer transitions 28/81 dead transitions. [2023-11-19 08:00:49,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 81 transitions, 460 flow [2023-11-19 08:00:49,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:00:49,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:00:49,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 930 transitions. [2023-11-19 08:00:49,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46384039900249374 [2023-11-19 08:00:49,503 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 930 transitions. [2023-11-19 08:00:49,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 930 transitions. [2023-11-19 08:00:49,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:49,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 930 transitions. [2023-11-19 08:00:49,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 186.0) internal successors, (930), 5 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:49,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 401.0) internal successors, (2406), 6 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:49,515 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 401.0) internal successors, (2406), 6 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:49,515 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 247 flow. Second operand 5 states and 930 transitions. [2023-11-19 08:00:49,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 81 transitions, 460 flow [2023-11-19 08:00:49,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 81 transitions, 456 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 08:00:49,530 INFO L231 Difference]: Finished difference. Result has 62 places, 53 transitions, 225 flow [2023-11-19 08:00:49,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=225, PETRI_PLACES=62, PETRI_TRANSITIONS=53} [2023-11-19 08:00:49,532 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 14 predicate places. [2023-11-19 08:00:49,532 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 53 transitions, 225 flow [2023-11-19 08:00:49,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 178.8) internal successors, (894), 5 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:49,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:49,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:49,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 08:00:49,534 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-19 08:00:49,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:49,535 INFO L85 PathProgramCache]: Analyzing trace with hash -2094414547, now seen corresponding path program 1 times [2023-11-19 08:00:49,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:49,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706342767] [2023-11-19 08:00:49,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:49,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:49,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:49,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706342767] [2023-11-19 08:00:49,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706342767] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:49,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518175754] [2023-11-19 08:00:49,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:49,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:49,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:49,766 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:49,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:00:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:49,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 08:00:49,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:50,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:50,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:50,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518175754] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:50,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:50,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-19 08:00:50,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494128791] [2023-11-19 08:00:50,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:50,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 08:00:50,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:50,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 08:00:50,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:00:50,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 401 [2023-11-19 08:00:50,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 53 transitions, 225 flow. Second operand has 12 states, 12 states have (on average 176.83333333333334) internal successors, (2122), 12 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:50,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:50,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 401 [2023-11-19 08:00:50,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:51,394 INFO L124 PetriNetUnfolderBase]: 4815/6990 cut-off events. [2023-11-19 08:00:51,394 INFO L125 PetriNetUnfolderBase]: For 7639/7639 co-relation queries the response was YES. [2023-11-19 08:00:51,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18851 conditions, 6990 events. 4815/6990 cut-off events. For 7639/7639 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 39006 event pairs, 1748 based on Foata normal form. 212/6919 useless extension candidates. Maximal degree in co-relation 18830. Up to 2554 conditions per place. [2023-11-19 08:00:51,463 INFO L140 encePairwiseOnDemand]: 395/401 looper letters, 115 selfloop transitions, 7 changer transitions 0/133 dead transitions. [2023-11-19 08:00:51,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 133 transitions, 793 flow [2023-11-19 08:00:51,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 08:00:51,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 08:00:51,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1316 transitions. [2023-11-19 08:00:51,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4688279301745636 [2023-11-19 08:00:51,470 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1316 transitions. [2023-11-19 08:00:51,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1316 transitions. [2023-11-19 08:00:51,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:51,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1316 transitions. [2023-11-19 08:00:51,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 188.0) internal successors, (1316), 7 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:51,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 401.0) internal successors, (3208), 8 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:51,484 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 401.0) internal successors, (3208), 8 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:51,485 INFO L175 Difference]: Start difference. First operand has 62 places, 53 transitions, 225 flow. Second operand 7 states and 1316 transitions. [2023-11-19 08:00:51,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 133 transitions, 793 flow [2023-11-19 08:00:51,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 133 transitions, 763 flow, removed 13 selfloop flow, removed 5 redundant places. [2023-11-19 08:00:51,513 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 274 flow [2023-11-19 08:00:51,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=274, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-11-19 08:00:51,516 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 15 predicate places. [2023-11-19 08:00:51,516 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 274 flow [2023-11-19 08:00:51,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 176.83333333333334) internal successors, (2122), 12 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:51,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:51,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:51,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 08:00:51,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:51,740 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-19 08:00:51,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:51,740 INFO L85 PathProgramCache]: Analyzing trace with hash 763879143, now seen corresponding path program 1 times [2023-11-19 08:00:51,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:51,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687046801] [2023-11-19 08:00:51,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:51,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:52,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:52,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:52,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687046801] [2023-11-19 08:00:52,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687046801] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:52,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298540131] [2023-11-19 08:00:52,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:52,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:52,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:52,005 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:52,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:00:52,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:52,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 08:00:52,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:52,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:52,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298540131] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:52,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:52,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-19 08:00:52,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075674895] [2023-11-19 08:00:52,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:52,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 08:00:52,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:52,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 08:00:52,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:00:52,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 401 [2023-11-19 08:00:52,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 274 flow. Second operand has 12 states, 12 states have (on average 177.08333333333334) internal successors, (2125), 12 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:52,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:52,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 401 [2023-11-19 08:00:52,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:53,412 INFO L124 PetriNetUnfolderBase]: 3091/4807 cut-off events. [2023-11-19 08:00:53,412 INFO L125 PetriNetUnfolderBase]: For 5909/5909 co-relation queries the response was YES. [2023-11-19 08:00:53,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13445 conditions, 4807 events. 3091/4807 cut-off events. For 5909/5909 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 26446 event pairs, 1031 based on Foata normal form. 308/4891 useless extension candidates. Maximal degree in co-relation 11772. Up to 2040 conditions per place. [2023-11-19 08:00:53,450 INFO L140 encePairwiseOnDemand]: 393/401 looper letters, 61 selfloop transitions, 5 changer transitions 28/105 dead transitions. [2023-11-19 08:00:53,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 105 transitions, 661 flow [2023-11-19 08:00:53,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 08:00:53,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 08:00:53,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1294 transitions. [2023-11-19 08:00:53,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46099038118988245 [2023-11-19 08:00:53,456 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1294 transitions. [2023-11-19 08:00:53,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1294 transitions. [2023-11-19 08:00:53,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:53,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1294 transitions. [2023-11-19 08:00:53,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 184.85714285714286) internal successors, (1294), 7 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:53,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 401.0) internal successors, (3208), 8 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:53,470 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 401.0) internal successors, (3208), 8 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:53,470 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 274 flow. Second operand 7 states and 1294 transitions. [2023-11-19 08:00:53,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 105 transitions, 661 flow [2023-11-19 08:00:53,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 105 transitions, 653 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-19 08:00:53,477 INFO L231 Difference]: Finished difference. Result has 72 places, 56 transitions, 268 flow [2023-11-19 08:00:53,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=268, PETRI_PLACES=72, PETRI_TRANSITIONS=56} [2023-11-19 08:00:53,478 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 24 predicate places. [2023-11-19 08:00:53,478 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 56 transitions, 268 flow [2023-11-19 08:00:53,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 177.08333333333334) internal successors, (2125), 12 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:53,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:53,480 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:53,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:53,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:53,702 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-19 08:00:53,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:53,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1910740051, now seen corresponding path program 2 times [2023-11-19 08:00:53,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:53,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113571267] [2023-11-19 08:00:53,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:53,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:53,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:53,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113571267] [2023-11-19 08:00:53,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113571267] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:53,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982111483] [2023-11-19 08:00:53,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:00:53,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:53,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:53,923 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:53,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:00:54,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:00:54,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:54,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 08:00:54,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:54,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:54,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:54,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982111483] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:54,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:54,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-19 08:00:54,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650635885] [2023-11-19 08:00:54,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:54,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 08:00:54,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:54,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 08:00:54,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:00:54,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 401 [2023-11-19 08:00:54,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 56 transitions, 268 flow. Second operand has 12 states, 12 states have (on average 177.41666666666666) internal successors, (2129), 12 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:54,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:54,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 401 [2023-11-19 08:00:54,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:54,955 INFO L124 PetriNetUnfolderBase]: 2297/3300 cut-off events. [2023-11-19 08:00:54,956 INFO L125 PetriNetUnfolderBase]: For 6230/6230 co-relation queries the response was YES. [2023-11-19 08:00:54,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11499 conditions, 3300 events. 2297/3300 cut-off events. For 6230/6230 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 15003 event pairs, 800 based on Foata normal form. 88/3298 useless extension candidates. Maximal degree in co-relation 11459. Up to 2924 conditions per place. [2023-11-19 08:00:54,996 INFO L140 encePairwiseOnDemand]: 393/401 looper letters, 50 selfloop transitions, 8 changer transitions 0/69 dead transitions. [2023-11-19 08:00:54,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 69 transitions, 454 flow [2023-11-19 08:00:54,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 08:00:54,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 08:00:55,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1263 transitions. [2023-11-19 08:00:55,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44994656216601353 [2023-11-19 08:00:55,003 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1263 transitions. [2023-11-19 08:00:55,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1263 transitions. [2023-11-19 08:00:55,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:55,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1263 transitions. [2023-11-19 08:00:55,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 180.42857142857142) internal successors, (1263), 7 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:55,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 401.0) internal successors, (3208), 8 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:55,015 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 401.0) internal successors, (3208), 8 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:55,016 INFO L175 Difference]: Start difference. First operand has 72 places, 56 transitions, 268 flow. Second operand 7 states and 1263 transitions. [2023-11-19 08:00:55,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 69 transitions, 454 flow [2023-11-19 08:00:55,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 69 transitions, 402 flow, removed 20 selfloop flow, removed 9 redundant places. [2023-11-19 08:00:55,028 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 268 flow [2023-11-19 08:00:55,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=268, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2023-11-19 08:00:55,033 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 18 predicate places. [2023-11-19 08:00:55,033 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 268 flow [2023-11-19 08:00:55,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 177.41666666666666) internal successors, (2129), 12 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:55,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:55,037 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:55,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:55,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 08:00:55,251 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-19 08:00:55,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:55,251 INFO L85 PathProgramCache]: Analyzing trace with hash -94283823, now seen corresponding path program 2 times [2023-11-19 08:00:55,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:55,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195727018] [2023-11-19 08:00:55,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:55,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:55,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:55,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195727018] [2023-11-19 08:00:55,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195727018] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:55,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607757663] [2023-11-19 08:00:55,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:00:55,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:55,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:55,453 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:55,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:00:55,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:00:55,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:55,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 08:00:55,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:55,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:55,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:55,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:55,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607757663] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:55,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:00:55,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2023-11-19 08:00:55,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523277131] [2023-11-19 08:00:55,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:55,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:00:55,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:55,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:00:55,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:00:55,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 401 [2023-11-19 08:00:55,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 268 flow. Second operand has 6 states, 6 states have (on average 178.33333333333334) internal successors, (1070), 6 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:55,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:55,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 401 [2023-11-19 08:00:55,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:56,253 INFO L124 PetriNetUnfolderBase]: 1836/2659 cut-off events. [2023-11-19 08:00:56,253 INFO L125 PetriNetUnfolderBase]: For 4124/4124 co-relation queries the response was YES. [2023-11-19 08:00:56,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8863 conditions, 2659 events. 1836/2659 cut-off events. For 4124/4124 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 12060 event pairs, 828 based on Foata normal form. 160/2723 useless extension candidates. Maximal degree in co-relation 8827. Up to 1909 conditions per place. [2023-11-19 08:00:56,278 INFO L140 encePairwiseOnDemand]: 396/401 looper letters, 61 selfloop transitions, 8 changer transitions 0/80 dead transitions. [2023-11-19 08:00:56,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 80 transitions, 495 flow [2023-11-19 08:00:56,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:00:56,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:00:56,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1097 transitions. [2023-11-19 08:00:56,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45594347464671653 [2023-11-19 08:00:56,284 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1097 transitions. [2023-11-19 08:00:56,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1097 transitions. [2023-11-19 08:00:56,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:56,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1097 transitions. [2023-11-19 08:00:56,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 182.83333333333334) internal successors, (1097), 6 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:56,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 401.0) internal successors, (2807), 7 states have internal predecessors, (2807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:56,295 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 401.0) internal successors, (2807), 7 states have internal predecessors, (2807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:56,295 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 268 flow. Second operand 6 states and 1097 transitions. [2023-11-19 08:00:56,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 80 transitions, 495 flow [2023-11-19 08:00:56,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 80 transitions, 467 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-11-19 08:00:56,303 INFO L231 Difference]: Finished difference. Result has 68 places, 58 transitions, 269 flow [2023-11-19 08:00:56,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=269, PETRI_PLACES=68, PETRI_TRANSITIONS=58} [2023-11-19 08:00:56,304 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 20 predicate places. [2023-11-19 08:00:56,305 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 58 transitions, 269 flow [2023-11-19 08:00:56,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 178.33333333333334) internal successors, (1070), 6 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:56,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:56,306 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:56,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:56,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 08:00:56,527 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-19 08:00:56,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:56,527 INFO L85 PathProgramCache]: Analyzing trace with hash 134310235, now seen corresponding path program 1 times [2023-11-19 08:00:56,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:56,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344854786] [2023-11-19 08:00:56,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:56,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:58,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:58,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:58,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344854786] [2023-11-19 08:00:58,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344854786] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:58,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235298418] [2023-11-19 08:00:58,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:58,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:58,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:58,120 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:58,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:00:58,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:58,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-19 08:00:58,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:58,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:00:58,494 INFO L378 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 18 treesize of output 13 [2023-11-19 08:00:58,597 INFO L378 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 19 treesize of output 7 [2023-11-19 08:00:58,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 08:00:58,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:58,821 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:00:58,822 INFO L378 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 48 treesize of output 32 [2023-11-19 08:00:58,828 INFO L378 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 9 [2023-11-19 08:00:58,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 08:00:58,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235298418] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:58,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:58,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 25 [2023-11-19 08:00:58,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501230142] [2023-11-19 08:00:58,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:58,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-19 08:00:58,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:58,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-19 08:00:58,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=613, Unknown=2, NotChecked=0, Total=702 [2023-11-19 08:01:00,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 401 [2023-11-19 08:01:00,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 58 transitions, 269 flow. Second operand has 27 states, 27 states have (on average 137.4814814814815) internal successors, (3712), 27 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:00,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:00,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 401 [2023-11-19 08:01:00,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:03,150 INFO L124 PetriNetUnfolderBase]: 4119/5935 cut-off events. [2023-11-19 08:01:03,150 INFO L125 PetriNetUnfolderBase]: For 9001/9001 co-relation queries the response was YES. [2023-11-19 08:01:03,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19352 conditions, 5935 events. 4119/5935 cut-off events. For 9001/9001 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 29384 event pairs, 839 based on Foata normal form. 2/5770 useless extension candidates. Maximal degree in co-relation 19315. Up to 2853 conditions per place. [2023-11-19 08:01:03,211 INFO L140 encePairwiseOnDemand]: 389/401 looper letters, 204 selfloop transitions, 57 changer transitions 2/270 dead transitions. [2023-11-19 08:01:03,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 270 transitions, 1666 flow [2023-11-19 08:01:03,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 08:01:03,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-19 08:01:03,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2798 transitions. [2023-11-19 08:01:03,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3672397952487203 [2023-11-19 08:01:03,226 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2798 transitions. [2023-11-19 08:01:03,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2798 transitions. [2023-11-19 08:01:03,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:03,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2798 transitions. [2023-11-19 08:01:03,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 147.26315789473685) internal successors, (2798), 19 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:03,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 401.0) internal successors, (8020), 20 states have internal predecessors, (8020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:03,277 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 401.0) internal successors, (8020), 20 states have internal predecessors, (8020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:03,277 INFO L175 Difference]: Start difference. First operand has 68 places, 58 transitions, 269 flow. Second operand 19 states and 2798 transitions. [2023-11-19 08:01:03,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 270 transitions, 1666 flow [2023-11-19 08:01:03,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 270 transitions, 1618 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-19 08:01:03,297 INFO L231 Difference]: Finished difference. Result has 90 places, 111 transitions, 771 flow [2023-11-19 08:01:03,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=771, PETRI_PLACES=90, PETRI_TRANSITIONS=111} [2023-11-19 08:01:03,298 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 42 predicate places. [2023-11-19 08:01:03,299 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 111 transitions, 771 flow [2023-11-19 08:01:03,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 137.4814814814815) internal successors, (3712), 27 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:03,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:03,301 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:03,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:03,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 08:01:03,515 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-19 08:01:03,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:03,515 INFO L85 PathProgramCache]: Analyzing trace with hash 714827297, now seen corresponding path program 2 times [2023-11-19 08:01:03,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:03,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225526234] [2023-11-19 08:01:03,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:03,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:05,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:05,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225526234] [2023-11-19 08:01:05,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225526234] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:01:05,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741821189] [2023-11-19 08:01:05,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:01:05,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:05,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:05,007 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:05,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:01:05,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:01:05,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:01:05,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-19 08:01:05,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:05,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:01:05,391 INFO L378 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 18 treesize of output 13 [2023-11-19 08:01:05,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:01:05,468 INFO L378 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 18 treesize of output 13 [2023-11-19 08:01:05,528 INFO L378 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 19 treesize of output 7 [2023-11-19 08:01:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:01:05,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:05,993 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:01:05,993 INFO L378 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 104 treesize of output 70 [2023-11-19 08:01:06,000 INFO L378 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 62 treesize of output 54 [2023-11-19 08:01:06,008 INFO L378 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 28 treesize of output 24 [2023-11-19 08:01:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 08:01:06,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741821189] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:06,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:01:06,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 28 [2023-11-19 08:01:06,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627385096] [2023-11-19 08:01:06,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:06,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-19 08:01:06,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:06,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-19 08:01:06,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=732, Unknown=23, NotChecked=0, Total=870 [2023-11-19 08:01:06,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 401 [2023-11-19 08:01:06,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 111 transitions, 771 flow. Second operand has 30 states, 30 states have (on average 137.36666666666667) internal successors, (4121), 30 states have internal predecessors, (4121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:06,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:06,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 401 [2023-11-19 08:01:06,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:09,119 INFO L124 PetriNetUnfolderBase]: 6609/9446 cut-off events. [2023-11-19 08:01:09,120 INFO L125 PetriNetUnfolderBase]: For 29991/30199 co-relation queries the response was YES. [2023-11-19 08:01:09,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37583 conditions, 9446 events. 6609/9446 cut-off events. For 29991/30199 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 50505 event pairs, 1314 based on Foata normal form. 11/9196 useless extension candidates. Maximal degree in co-relation 37536. Up to 4402 conditions per place. [2023-11-19 08:01:09,202 INFO L140 encePairwiseOnDemand]: 388/401 looper letters, 218 selfloop transitions, 60 changer transitions 2/287 dead transitions. [2023-11-19 08:01:09,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 287 transitions, 2284 flow [2023-11-19 08:01:09,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 08:01:09,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 08:01:09,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2067 transitions. [2023-11-19 08:01:09,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36818667616672607 [2023-11-19 08:01:09,212 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2067 transitions. [2023-11-19 08:01:09,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2067 transitions. [2023-11-19 08:01:09,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:09,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2067 transitions. [2023-11-19 08:01:09,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 147.64285714285714) internal successors, (2067), 14 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:09,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 401.0) internal successors, (6015), 15 states have internal predecessors, (6015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:09,232 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 401.0) internal successors, (6015), 15 states have internal predecessors, (6015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:09,232 INFO L175 Difference]: Start difference. First operand has 90 places, 111 transitions, 771 flow. Second operand 14 states and 2067 transitions. [2023-11-19 08:01:09,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 287 transitions, 2284 flow [2023-11-19 08:01:09,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 287 transitions, 2224 flow, removed 20 selfloop flow, removed 5 redundant places. [2023-11-19 08:01:09,336 INFO L231 Difference]: Finished difference. Result has 104 places, 141 transitions, 1171 flow [2023-11-19 08:01:09,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1171, PETRI_PLACES=104, PETRI_TRANSITIONS=141} [2023-11-19 08:01:09,337 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 56 predicate places. [2023-11-19 08:01:09,337 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 141 transitions, 1171 flow [2023-11-19 08:01:09,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 137.36666666666667) internal successors, (4121), 30 states have internal predecessors, (4121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:09,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:09,339 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:09,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:09,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 08:01:09,555 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-19 08:01:09,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:09,555 INFO L85 PathProgramCache]: Analyzing trace with hash -2051731597, now seen corresponding path program 3 times [2023-11-19 08:01:09,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:09,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622578525] [2023-11-19 08:01:09,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:09,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:11,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:11,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622578525] [2023-11-19 08:01:11,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622578525] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:01:11,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827084691] [2023-11-19 08:01:11,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 08:01:11,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:11,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:11,047 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:11,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:01:11,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 08:01:11,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:01:11,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-19 08:01:11,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:11,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:01:11,449 INFO L378 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 18 treesize of output 13 [2023-11-19 08:01:11,536 INFO L378 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 19 treesize of output 7 [2023-11-19 08:01:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:01:11,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:11,601 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_412 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork2_~#t3~0.base| v_ArrVal_412) c_~X_0~0.base) (+ c_~X_0~0.offset 4)) c_~s_2~0)) is different from false [2023-11-19 08:01:11,676 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:01:11,676 INFO L378 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 48 treesize of output 32 [2023-11-19 08:01:11,681 INFO L378 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 9 [2023-11-19 08:01:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-11-19 08:01:11,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827084691] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:11,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:01:11,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 8] total 27 [2023-11-19 08:01:11,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7809894] [2023-11-19 08:01:11,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:11,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-19 08:01:11,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:11,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-19 08:01:11,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=665, Unknown=3, NotChecked=52, Total=812 [2023-11-19 08:01:11,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 401 [2023-11-19 08:01:11,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 141 transitions, 1171 flow. Second operand has 29 states, 29 states have (on average 132.6551724137931) internal successors, (3847), 29 states have internal predecessors, (3847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:11,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:11,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 401 [2023-11-19 08:01:11,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:15,525 INFO L124 PetriNetUnfolderBase]: 8281/11886 cut-off events. [2023-11-19 08:01:15,526 INFO L125 PetriNetUnfolderBase]: For 48836/48844 co-relation queries the response was YES. [2023-11-19 08:01:15,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51192 conditions, 11886 events. 8281/11886 cut-off events. For 48836/48844 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 65503 event pairs, 1347 based on Foata normal form. 9/11537 useless extension candidates. Maximal degree in co-relation 51138. Up to 4304 conditions per place. [2023-11-19 08:01:15,684 INFO L140 encePairwiseOnDemand]: 388/401 looper letters, 242 selfloop transitions, 97 changer transitions 2/348 dead transitions. [2023-11-19 08:01:15,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 348 transitions, 3082 flow [2023-11-19 08:01:15,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-19 08:01:15,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-19 08:01:15,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3231 transitions. [2023-11-19 08:01:15,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35031985254255665 [2023-11-19 08:01:15,701 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3231 transitions. [2023-11-19 08:01:15,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3231 transitions. [2023-11-19 08:01:15,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:15,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3231 transitions. [2023-11-19 08:01:15,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 140.47826086956522) internal successors, (3231), 23 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:15,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 401.0) internal successors, (9624), 24 states have internal predecessors, (9624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:15,733 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 401.0) internal successors, (9624), 24 states have internal predecessors, (9624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:15,734 INFO L175 Difference]: Start difference. First operand has 104 places, 141 transitions, 1171 flow. Second operand 23 states and 3231 transitions. [2023-11-19 08:01:15,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 348 transitions, 3082 flow [2023-11-19 08:01:16,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 348 transitions, 2897 flow, removed 66 selfloop flow, removed 6 redundant places. [2023-11-19 08:01:16,234 INFO L231 Difference]: Finished difference. Result has 128 places, 175 transitions, 1720 flow [2023-11-19 08:01:16,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=1078, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1720, PETRI_PLACES=128, PETRI_TRANSITIONS=175} [2023-11-19 08:01:16,235 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 80 predicate places. [2023-11-19 08:01:16,236 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 175 transitions, 1720 flow [2023-11-19 08:01:16,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 132.6551724137931) internal successors, (3847), 29 states have internal predecessors, (3847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:16,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:16,237 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:16,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:16,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a0600d-ced1-4737-8dab-49fda73a13a4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 08:01:16,458 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-19 08:01:16,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:16,459 INFO L85 PathProgramCache]: Analyzing trace with hash 766327609, now seen corresponding path program 1 times [2023-11-19 08:01:16,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:16,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52129986] [2023-11-19 08:01:16,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:16,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat