./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-nzb-file-trans.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_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/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_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/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_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/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 0d0975dc4466296431d96c26938a2e71864de63aba998f18ecd8a32ca341796b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:58:57,946 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:58:58,016 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:58:58,022 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:58:58,023 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:58:58,048 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:58:58,049 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:58:58,049 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:58:58,050 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:58:58,051 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:58:58,052 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:58:58,052 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:58:58,053 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:58:58,054 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:58:58,054 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:58:58,055 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:58:58,055 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:58:58,056 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:58:58,056 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:58:58,057 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:58:58,057 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:58:58,058 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:58:58,059 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:58:58,059 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:58:58,060 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:58:58,060 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:58:58,061 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:58:58,061 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:58:58,061 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:58:58,062 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:58:58,062 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:58:58,063 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:58:58,063 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:58:58,064 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:58:58,064 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:58:58,064 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:58:58,065 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:58:58,065 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:58:58,066 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:58:58,066 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_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d0975dc4466296431d96c26938a2e71864de63aba998f18ecd8a32ca341796b [2023-11-19 07:58:58,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:58:58,365 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:58:58,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:58:58,371 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:58:58,371 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:58:58,373 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c [2023-11-19 07:59:01,458 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:59:01,697 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:59:01,698 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c [2023-11-19 07:59:01,711 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/bin/uautomizer-verify-uCwYo4JHxu/data/a92e290da/8c2817c32ade424aa07f815adad7e96c/FLAGc5706fcfb [2023-11-19 07:59:01,726 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/bin/uautomizer-verify-uCwYo4JHxu/data/a92e290da/8c2817c32ade424aa07f815adad7e96c [2023-11-19 07:59:01,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:59:01,731 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:59:01,732 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:59:01,733 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:59:01,738 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:59:01,739 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:59:01" (1/1) ... [2023-11-19 07:59:01,740 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25808c4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:01, skipping insertion in model container [2023-11-19 07:59:01,741 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:59:01" (1/1) ... [2023-11-19 07:59:01,773 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:59:02,071 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_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c[6489,6502] [2023-11-19 07:59:02,082 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:59:02,095 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:59:02,181 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_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c[6489,6502] [2023-11-19 07:59:02,186 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:59:02,213 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:59:02,213 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:02 WrapperNode [2023-11-19 07:59:02,224 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:59:02,226 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:59:02,226 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:59:02,226 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:59:02,234 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:02" (1/1) ... [2023-11-19 07:59:02,248 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:02" (1/1) ... [2023-11-19 07:59:02,309 INFO L138 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 28, calls inlined = 42, statements flattened = 606 [2023-11-19 07:59:02,310 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:59:02,310 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:59:02,310 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:59:02,311 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:59:02,321 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:02" (1/1) ... [2023-11-19 07:59:02,321 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:02" (1/1) ... [2023-11-19 07:59:02,329 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:02" (1/1) ... [2023-11-19 07:59:02,329 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:02" (1/1) ... [2023-11-19 07:59:02,351 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:02" (1/1) ... [2023-11-19 07:59:02,373 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:02" (1/1) ... [2023-11-19 07:59:02,377 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:02" (1/1) ... [2023-11-19 07:59:02,382 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:02" (1/1) ... [2023-11-19 07:59:02,403 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:59:02,408 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:59:02,409 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:59:02,409 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:59:02,410 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:02" (1/1) ... [2023-11-19 07:59:02,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:59:02,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:02,453 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:59:02,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:59:02,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:59:02,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:59:02,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:59:02,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:59:02,507 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:59:02,507 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:59:02,507 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:59:02,507 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:59:02,508 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 07:59:02,508 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 07:59:02,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:59:02,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:59:02,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:59:02,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:59:02,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:59:02,513 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:59:02,727 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:59:02,729 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:59:03,719 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:59:03,735 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:59:03,736 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-19 07:59:03,744 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:59:03 BoogieIcfgContainer [2023-11-19 07:59:03,745 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:59:03,747 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:59:03,748 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:59:03,751 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:59:03,752 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:59:01" (1/3) ... [2023-11-19 07:59:03,752 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63245b8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:59:03, skipping insertion in model container [2023-11-19 07:59:03,753 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:02" (2/3) ... [2023-11-19 07:59:03,753 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63245b8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:59:03, skipping insertion in model container [2023-11-19 07:59:03,753 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:59:03" (3/3) ... [2023-11-19 07:59:03,755 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-trans.wvr.c [2023-11-19 07:59:03,764 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:59:03,776 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:59:03,776 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:59:03,777 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:59:03,952 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 07:59:04,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 727 places, 790 transitions, 1601 flow [2023-11-19 07:59:04,525 INFO L124 PetriNetUnfolderBase]: 73/787 cut-off events. [2023-11-19 07:59:04,525 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:59:04,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 787 events. 73/787 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2726 event pairs, 0 based on Foata normal form. 0/713 useless extension candidates. Maximal degree in co-relation 585. Up to 2 conditions per place. [2023-11-19 07:59:04,558 INFO L82 GeneralOperation]: Start removeDead. Operand has 727 places, 790 transitions, 1601 flow [2023-11-19 07:59:04,581 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 713 places, 776 transitions, 1570 flow [2023-11-19 07:59:04,585 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:59:04,600 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 713 places, 776 transitions, 1570 flow [2023-11-19 07:59:04,604 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 713 places, 776 transitions, 1570 flow [2023-11-19 07:59:04,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 713 places, 776 transitions, 1570 flow [2023-11-19 07:59:05,033 INFO L124 PetriNetUnfolderBase]: 73/776 cut-off events. [2023-11-19 07:59:05,033 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:59:05,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 789 conditions, 776 events. 73/776 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2730 event pairs, 0 based on Foata normal form. 0/703 useless extension candidates. Maximal degree in co-relation 585. Up to 2 conditions per place. [2023-11-19 07:59:05,136 INFO L119 LiptonReduction]: Number of co-enabled transitions 194184 [2023-11-19 07:59:39,299 INFO L134 LiptonReduction]: Checked pairs total: 183540 [2023-11-19 07:59:39,299 INFO L136 LiptonReduction]: Total number of compositions: 985 [2023-11-19 07:59:39,316 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:59:39,323 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;@2180aa7c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:59:39,324 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 07:59:39,337 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:59:39,338 INFO L124 PetriNetUnfolderBase]: 12/47 cut-off events. [2023-11-19 07:59:39,338 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:59:39,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:39,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:39,340 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:59:39,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:39,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1098161225, now seen corresponding path program 1 times [2023-11-19 07:59:39,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:39,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097418546] [2023-11-19 07:59:39,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:39,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:39,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:39,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:39,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097418546] [2023-11-19 07:59:39,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097418546] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:39,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:39,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:59:39,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371167001] [2023-11-19 07:59:39,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:39,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:59:39,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:39,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:59:39,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:59:40,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 728 out of 1775 [2023-11-19 07:59:40,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 48 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 734.3333333333334) internal successors, (2203), 3 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:40,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:40,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 728 of 1775 [2023-11-19 07:59:40,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:41,081 INFO L124 PetriNetUnfolderBase]: 2694/3589 cut-off events. [2023-11-19 07:59:41,081 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-11-19 07:59:41,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7439 conditions, 3589 events. 2694/3589 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12714 event pairs, 1657 based on Foata normal form. 0/2552 useless extension candidates. Maximal degree in co-relation 6908. Up to 3587 conditions per place. [2023-11-19 07:59:41,110 INFO L140 encePairwiseOnDemand]: 1768/1775 looper letters, 45 selfloop transitions, 6 changer transitions 0/51 dead transitions. [2023-11-19 07:59:41,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 222 flow [2023-11-19 07:59:41,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:59:41,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:59:41,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2238 transitions. [2023-11-19 07:59:41,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42028169014084504 [2023-11-19 07:59:41,143 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2238 transitions. [2023-11-19 07:59:41,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2238 transitions. [2023-11-19 07:59:41,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:41,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2238 transitions. [2023-11-19 07:59:41,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 746.0) internal successors, (2238), 3 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:41,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1775.0) internal successors, (7100), 4 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:41,191 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1775.0) internal successors, (7100), 4 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:41,193 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 114 flow. Second operand 3 states and 2238 transitions. [2023-11-19 07:59:41,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 222 flow [2023-11-19 07:59:41,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 51 transitions, 210 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-19 07:59:41,210 INFO L231 Difference]: Finished difference. Result has 43 places, 51 transitions, 134 flow [2023-11-19 07:59:41,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1775, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=43, PETRI_TRANSITIONS=51} [2023-11-19 07:59:41,217 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2023-11-19 07:59:41,217 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 51 transitions, 134 flow [2023-11-19 07:59:41,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 734.3333333333334) internal successors, (2203), 3 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:41,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:41,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:41,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:59:41,221 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:59:41,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:41,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1785092784, now seen corresponding path program 1 times [2023-11-19 07:59:41,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:41,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163272262] [2023-11-19 07:59:41,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:41,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:41,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:59:41,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:41,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163272262] [2023-11-19 07:59:41,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163272262] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:41,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159640382] [2023-11-19 07:59:41,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:41,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:41,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:41,426 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:41,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:59:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:41,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:59:41,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:41,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:59:41,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:59:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:59:41,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159640382] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:59:41,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:59:41,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-19 07:59:41,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78283132] [2023-11-19 07:59:41,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:59:41,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:59:41,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:41,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:59:41,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:59:41,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 722 out of 1775 [2023-11-19 07:59:41,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 51 transitions, 134 flow. Second operand has 8 states, 8 states have (on average 725.5) internal successors, (5804), 8 states have internal predecessors, (5804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:41,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:41,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 722 of 1775 [2023-11-19 07:59:41,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:42,898 INFO L124 PetriNetUnfolderBase]: 2694/3598 cut-off events. [2023-11-19 07:59:42,899 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-19 07:59:42,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7333 conditions, 3598 events. 2694/3598 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12711 event pairs, 1657 based on Foata normal form. 6/2569 useless extension candidates. Maximal degree in co-relation 7284. Up to 3587 conditions per place. [2023-11-19 07:59:42,927 INFO L140 encePairwiseOnDemand]: 1768/1775 looper letters, 45 selfloop transitions, 15 changer transitions 0/60 dead transitions. [2023-11-19 07:59:42,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 60 transitions, 290 flow [2023-11-19 07:59:42,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:59:42,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:59:42,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 4401 transitions. [2023-11-19 07:59:42,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4132394366197183 [2023-11-19 07:59:42,946 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 4401 transitions. [2023-11-19 07:59:42,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 4401 transitions. [2023-11-19 07:59:42,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:42,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 4401 transitions. [2023-11-19 07:59:42,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 733.5) internal successors, (4401), 6 states have internal predecessors, (4401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:42,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1775.0) internal successors, (12425), 7 states have internal predecessors, (12425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:42,998 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1775.0) internal successors, (12425), 7 states have internal predecessors, (12425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:42,998 INFO L175 Difference]: Start difference. First operand has 43 places, 51 transitions, 134 flow. Second operand 6 states and 4401 transitions. [2023-11-19 07:59:42,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 60 transitions, 290 flow [2023-11-19 07:59:43,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 60 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:59:43,001 INFO L231 Difference]: Finished difference. Result has 50 places, 60 transitions, 224 flow [2023-11-19 07:59:43,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1775, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=224, PETRI_PLACES=50, PETRI_TRANSITIONS=60} [2023-11-19 07:59:43,003 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2023-11-19 07:59:43,003 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 60 transitions, 224 flow [2023-11-19 07:59:43,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 725.5) internal successors, (5804), 8 states have internal predecessors, (5804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:43,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:43,009 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:43,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:59:43,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-19 07:59:43,231 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:59:43,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:43,232 INFO L85 PathProgramCache]: Analyzing trace with hash 678926597, now seen corresponding path program 2 times [2023-11-19 07:59:43,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:43,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888629132] [2023-11-19 07:59:43,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:43,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 07:59:43,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:43,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888629132] [2023-11-19 07:59:43,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888629132] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:43,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048334216] [2023-11-19 07:59:43,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:59:43,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:43,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:43,478 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:43,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:59:43,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 07:59:43,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:59:43,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:59:43,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:45,325 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-19 07:59:45,325 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:59:45,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048334216] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:45,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:59:45,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-11-19 07:59:45,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607780110] [2023-11-19 07:59:45,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:45,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:59:45,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:45,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:59:45,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:59:45,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 712 out of 1775 [2023-11-19 07:59:45,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 60 transitions, 224 flow. Second operand has 5 states, 5 states have (on average 716.4) internal successors, (3582), 5 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:45,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:45,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 712 of 1775 [2023-11-19 07:59:45,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:47,596 INFO L124 PetriNetUnfolderBase]: 3034/4117 cut-off events. [2023-11-19 07:59:47,596 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-11-19 07:59:47,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8413 conditions, 4117 events. 3034/4117 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 15873 event pairs, 1657 based on Foata normal form. 1/2930 useless extension candidates. Maximal degree in co-relation 8325. Up to 3517 conditions per place. [2023-11-19 07:59:47,629 INFO L140 encePairwiseOnDemand]: 1771/1775 looper letters, 98 selfloop transitions, 2 changer transitions 7/107 dead transitions. [2023-11-19 07:59:47,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 107 transitions, 544 flow [2023-11-19 07:59:47,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:59:47,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:59:47,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3656 transitions. [2023-11-19 07:59:47,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41194366197183097 [2023-11-19 07:59:47,644 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3656 transitions. [2023-11-19 07:59:47,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3656 transitions. [2023-11-19 07:59:47,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:47,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3656 transitions. [2023-11-19 07:59:47,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 731.2) internal successors, (3656), 5 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:47,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1775.0) internal successors, (10650), 6 states have internal predecessors, (10650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:47,683 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1775.0) internal successors, (10650), 6 states have internal predecessors, (10650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:47,683 INFO L175 Difference]: Start difference. First operand has 50 places, 60 transitions, 224 flow. Second operand 5 states and 3656 transitions. [2023-11-19 07:59:47,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 107 transitions, 544 flow [2023-11-19 07:59:47,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 107 transitions, 520 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-19 07:59:47,689 INFO L231 Difference]: Finished difference. Result has 56 places, 61 transitions, 215 flow [2023-11-19 07:59:47,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1775, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=215, PETRI_PLACES=56, PETRI_TRANSITIONS=61} [2023-11-19 07:59:47,690 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2023-11-19 07:59:47,691 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 61 transitions, 215 flow [2023-11-19 07:59:47,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 716.4) internal successors, (3582), 5 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:47,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:47,693 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:47,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:59:47,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:47,909 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:59:47,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:47,909 INFO L85 PathProgramCache]: Analyzing trace with hash 990146751, now seen corresponding path program 3 times [2023-11-19 07:59:47,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:47,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887539004] [2023-11-19 07:59:47,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:47,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 07:59:48,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:48,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887539004] [2023-11-19 07:59:48,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887539004] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:48,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575057285] [2023-11-19 07:59:48,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:59:48,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:48,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:48,171 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:48,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f691aaeb-fcbf-4ee1-9614-ce74d4f1dd0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:59:48,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-19 07:59:48,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:59:48,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:59:48,387 INFO L285 TraceCheckSpWp]: Computing forward predicates...