./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-1.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_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/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_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/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_104ab802-f7cc-498a-8d52-380404404fcb/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 faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:04:11,449 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:04:11,513 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:04:11,518 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:04:11,519 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:04:11,544 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:04:11,545 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:04:11,546 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:04:11,546 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:04:11,547 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:04:11,548 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:04:11,548 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:04:11,549 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:04:11,550 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:04:11,550 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:04:11,551 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:04:11,552 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:04:11,552 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:04:11,553 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:04:11,553 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:04:11,554 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:04:11,555 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:04:11,555 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:04:11,556 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:04:11,556 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:04:11,557 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:04:11,557 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:04:11,558 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:04:11,558 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:04:11,559 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:04:11,560 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:04:11,560 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:04:11,561 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:04:11,561 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:04:11,562 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:04:11,562 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:04:11,563 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:04:11,563 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:04:11,564 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:04:11,565 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_104ab802-f7cc-498a-8d52-380404404fcb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 [2023-11-19 08:04:11,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:04:11,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:04:11,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:04:11,853 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:04:11,854 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:04:11,855 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2023-11-19 08:04:14,962 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:04:15,213 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:04:15,217 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2023-11-19 08:04:15,226 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/data/8fcc74063/11466ce027ab48c7ae46fb4d3ed3ab15/FLAG2e2eb7980 [2023-11-19 08:04:15,240 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/data/8fcc74063/11466ce027ab48c7ae46fb4d3ed3ab15 [2023-11-19 08:04:15,243 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:04:15,245 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:04:15,246 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:04:15,247 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:04:15,252 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:04:15,253 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:04:15" (1/1) ... [2023-11-19 08:04:15,254 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16d534f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:15, skipping insertion in model container [2023-11-19 08:04:15,254 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:04:15" (1/1) ... [2023-11-19 08:04:15,278 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:04:15,442 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_104ab802-f7cc-498a-8d52-380404404fcb/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c[2781,2794] [2023-11-19 08:04:15,454 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:04:15,466 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:04:15,492 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_104ab802-f7cc-498a-8d52-380404404fcb/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c[2781,2794] [2023-11-19 08:04:15,497 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:04:15,515 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:04:15,515 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:15 WrapperNode [2023-11-19 08:04:15,515 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:04:15,517 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:04:15,517 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:04:15,517 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:04:15,525 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:15" (1/1) ... [2023-11-19 08:04:15,535 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:15" (1/1) ... [2023-11-19 08:04:15,591 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 17, calls inlined = 31, statements flattened = 289 [2023-11-19 08:04:15,592 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:04:15,593 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:04:15,593 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:04:15,593 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:04:15,602 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:15" (1/1) ... [2023-11-19 08:04:15,603 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:15" (1/1) ... [2023-11-19 08:04:15,616 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:15" (1/1) ... [2023-11-19 08:04:15,616 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:15" (1/1) ... [2023-11-19 08:04:15,632 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:15" (1/1) ... [2023-11-19 08:04:15,637 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:15" (1/1) ... [2023-11-19 08:04:15,640 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:15" (1/1) ... [2023-11-19 08:04:15,643 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:15" (1/1) ... [2023-11-19 08:04:15,648 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:04:15,649 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:04:15,649 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:04:15,650 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:04:15,650 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:15" (1/1) ... [2023-11-19 08:04:15,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:04:15,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:15,712 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:04:15,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:04:15,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:04:15,760 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 08:04:15,761 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 08:04:15,761 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 08:04:15,762 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 08:04:15,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:04:15,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:04:15,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:04:15,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 08:04:15,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:04:15,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:04:15,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:04:15,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:04:15,769 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 08:04:15,948 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:04:15,952 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:04:16,539 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:04:16,558 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:04:16,558 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 08:04:16,565 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:04:16 BoogieIcfgContainer [2023-11-19 08:04:16,565 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:04:16,568 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:04:16,568 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:04:16,572 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:04:16,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:04:15" (1/3) ... [2023-11-19 08:04:16,573 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23369d40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:04:16, skipping insertion in model container [2023-11-19 08:04:16,573 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:15" (2/3) ... [2023-11-19 08:04:16,574 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23369d40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:04:16, skipping insertion in model container [2023-11-19 08:04:16,574 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:04:16" (3/3) ... [2023-11-19 08:04:16,575 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2023-11-19 08:04:16,584 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 08:04:16,595 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:04:16,596 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:04:16,596 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:04:16,745 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 08:04:16,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 384 places, 405 transitions, 824 flow [2023-11-19 08:04:16,979 INFO L124 PetriNetUnfolderBase]: 28/403 cut-off events. [2023-11-19 08:04:16,980 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:04:17,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 403 events. 28/403 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 906 event pairs, 0 based on Foata normal form. 0/374 useless extension candidates. Maximal degree in co-relation 273. Up to 2 conditions per place. [2023-11-19 08:04:17,014 INFO L82 GeneralOperation]: Start removeDead. Operand has 384 places, 405 transitions, 824 flow [2023-11-19 08:04:17,025 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 373 places, 394 transitions, 800 flow [2023-11-19 08:04:17,029 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:04:17,040 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 373 places, 394 transitions, 800 flow [2023-11-19 08:04:17,043 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 373 places, 394 transitions, 800 flow [2023-11-19 08:04:17,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 373 places, 394 transitions, 800 flow [2023-11-19 08:04:17,158 INFO L124 PetriNetUnfolderBase]: 28/394 cut-off events. [2023-11-19 08:04:17,158 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:04:17,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 394 events. 28/394 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 904 event pairs, 0 based on Foata normal form. 0/366 useless extension candidates. Maximal degree in co-relation 273. Up to 2 conditions per place. [2023-11-19 08:04:17,188 INFO L119 LiptonReduction]: Number of co-enabled transitions 38252 [2023-11-19 08:04:31,017 INFO L134 LiptonReduction]: Checked pairs total: 32873 [2023-11-19 08:04:31,017 INFO L136 LiptonReduction]: Total number of compositions: 494 [2023-11-19 08:04:31,033 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:04:31,041 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;@3831d516, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:04:31,041 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 08:04:31,046 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:04:31,047 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2023-11-19 08:04:31,047 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:04:31,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:31,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:31,049 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:04:31,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:31,054 INFO L85 PathProgramCache]: Analyzing trace with hash 244853958, now seen corresponding path program 1 times [2023-11-19 08:04:31,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:31,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538887586] [2023-11-19 08:04:31,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:31,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:31,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:31,792 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 08:04:31,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:31,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538887586] [2023-11-19 08:04:31,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538887586] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:31,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:31,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:04:31,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855072091] [2023-11-19 08:04:31,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:31,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:04:31,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:31,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:04:31,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:04:31,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 361 out of 899 [2023-11-19 08:04:31,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 363.4) internal successors, (1817), 5 states have internal predecessors, (1817), 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 08:04:31,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:31,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 361 of 899 [2023-11-19 08:04:31,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:32,185 INFO L124 PetriNetUnfolderBase]: 140/229 cut-off events. [2023-11-19 08:04:32,186 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 08:04:32,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484 conditions, 229 events. 140/229 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 758 event pairs, 15 based on Foata normal form. 1/159 useless extension candidates. Maximal degree in co-relation 400. Up to 144 conditions per place. [2023-11-19 08:04:32,192 INFO L140 encePairwiseOnDemand]: 893/899 looper letters, 32 selfloop transitions, 10 changer transitions 1/45 dead transitions. [2023-11-19 08:04:32,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 45 transitions, 203 flow [2023-11-19 08:04:32,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:04:32,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:04:32,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1849 transitions. [2023-11-19 08:04:32,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4113459399332592 [2023-11-19 08:04:32,231 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1849 transitions. [2023-11-19 08:04:32,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1849 transitions. [2023-11-19 08:04:32,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:32,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1849 transitions. [2023-11-19 08:04:32,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 369.8) internal successors, (1849), 5 states have internal predecessors, (1849), 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 08:04:32,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 899.0) internal successors, (5394), 6 states have internal predecessors, (5394), 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 08:04:32,279 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 899.0) internal successors, (5394), 6 states have internal predecessors, (5394), 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 08:04:32,282 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 48 flow. Second operand 5 states and 1849 transitions. [2023-11-19 08:04:32,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 45 transitions, 203 flow [2023-11-19 08:04:32,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 45 transitions, 185 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 08:04:32,289 INFO L231 Difference]: Finished difference. Result has 25 places, 27 transitions, 103 flow [2023-11-19 08:04:32,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=25, PETRI_TRANSITIONS=27} [2023-11-19 08:04:32,299 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2023-11-19 08:04:32,299 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 27 transitions, 103 flow [2023-11-19 08:04:32,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 363.4) internal successors, (1817), 5 states have internal predecessors, (1817), 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 08:04:32,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:32,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:32,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:04:32,303 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:04:32,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:32,304 INFO L85 PathProgramCache]: Analyzing trace with hash 611760097, now seen corresponding path program 1 times [2023-11-19 08:04:32,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:32,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208123004] [2023-11-19 08:04:32,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:32,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:32,574 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 08:04:32,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:32,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208123004] [2023-11-19 08:04:32,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208123004] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:32,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:32,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:04:32,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607809070] [2023-11-19 08:04:32,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:32,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:04:32,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:32,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:04:32,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:04:32,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 365 out of 899 [2023-11-19 08:04:32,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 27 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 368.25) internal successors, (1473), 4 states have internal predecessors, (1473), 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 08:04:32,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:32,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 365 of 899 [2023-11-19 08:04:32,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:32,841 INFO L124 PetriNetUnfolderBase]: 189/320 cut-off events. [2023-11-19 08:04:32,841 INFO L125 PetriNetUnfolderBase]: For 211/214 co-relation queries the response was YES. [2023-11-19 08:04:32,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 961 conditions, 320 events. 189/320 cut-off events. For 211/214 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1180 event pairs, 80 based on Foata normal form. 16/320 useless extension candidates. Maximal degree in co-relation 491. Up to 166 conditions per place. [2023-11-19 08:04:32,846 INFO L140 encePairwiseOnDemand]: 894/899 looper letters, 35 selfloop transitions, 6 changer transitions 0/43 dead transitions. [2023-11-19 08:04:32,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 43 transitions, 244 flow [2023-11-19 08:04:32,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:04:32,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:04:32,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1489 transitions. [2023-11-19 08:04:32,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4140711902113459 [2023-11-19 08:04:32,857 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1489 transitions. [2023-11-19 08:04:32,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1489 transitions. [2023-11-19 08:04:32,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:32,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1489 transitions. [2023-11-19 08:04:32,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 372.25) internal successors, (1489), 4 states have internal predecessors, (1489), 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 08:04:32,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 899.0) internal successors, (4495), 5 states have internal predecessors, (4495), 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 08:04:32,883 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 899.0) internal successors, (4495), 5 states have internal predecessors, (4495), 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 08:04:32,883 INFO L175 Difference]: Start difference. First operand has 25 places, 27 transitions, 103 flow. Second operand 4 states and 1489 transitions. [2023-11-19 08:04:32,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 43 transitions, 244 flow [2023-11-19 08:04:32,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 43 transitions, 242 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-19 08:04:32,892 INFO L231 Difference]: Finished difference. Result has 31 places, 31 transitions, 157 flow [2023-11-19 08:04:32,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=157, PETRI_PLACES=31, PETRI_TRANSITIONS=31} [2023-11-19 08:04:32,894 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 9 predicate places. [2023-11-19 08:04:32,894 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 31 transitions, 157 flow [2023-11-19 08:04:32,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 368.25) internal successors, (1473), 4 states have internal predecessors, (1473), 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 08:04:32,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:32,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:32,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:04:32,905 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:04:32,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:32,908 INFO L85 PathProgramCache]: Analyzing trace with hash 482903667, now seen corresponding path program 1 times [2023-11-19 08:04:32,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:32,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153212107] [2023-11-19 08:04:32,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:32,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:33,061 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 08:04:33,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:33,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153212107] [2023-11-19 08:04:33,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153212107] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:33,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:33,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:04:33,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936516235] [2023-11-19 08:04:33,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:33,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:04:33,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:33,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:04:33,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:04:33,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 364 out of 899 [2023-11-19 08:04:33,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 31 transitions, 157 flow. Second operand has 4 states, 4 states have (on average 367.5) internal successors, (1470), 4 states have internal predecessors, (1470), 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 08:04:33,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:33,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 364 of 899 [2023-11-19 08:04:33,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:33,324 INFO L124 PetriNetUnfolderBase]: 143/249 cut-off events. [2023-11-19 08:04:33,324 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2023-11-19 08:04:33,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 858 conditions, 249 events. 143/249 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 877 event pairs, 55 based on Foata normal form. 6/255 useless extension candidates. Maximal degree in co-relation 747. Up to 141 conditions per place. [2023-11-19 08:04:33,327 INFO L140 encePairwiseOnDemand]: 894/899 looper letters, 30 selfloop transitions, 4 changer transitions 4/40 dead transitions. [2023-11-19 08:04:33,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 40 transitions, 276 flow [2023-11-19 08:04:33,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:04:33,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:04:33,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1482 transitions. [2023-11-19 08:04:33,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41212458286985537 [2023-11-19 08:04:33,336 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1482 transitions. [2023-11-19 08:04:33,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1482 transitions. [2023-11-19 08:04:33,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:33,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1482 transitions. [2023-11-19 08:04:33,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 370.5) internal successors, (1482), 4 states have internal predecessors, (1482), 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 08:04:33,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 899.0) internal successors, (4495), 5 states have internal predecessors, (4495), 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 08:04:33,359 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 899.0) internal successors, (4495), 5 states have internal predecessors, (4495), 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 08:04:33,360 INFO L175 Difference]: Start difference. First operand has 31 places, 31 transitions, 157 flow. Second operand 4 states and 1482 transitions. [2023-11-19 08:04:33,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 40 transitions, 276 flow [2023-11-19 08:04:33,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 272 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-19 08:04:33,364 INFO L231 Difference]: Finished difference. Result has 35 places, 28 transitions, 143 flow [2023-11-19 08:04:33,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2023-11-19 08:04:33,366 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 13 predicate places. [2023-11-19 08:04:33,366 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 143 flow [2023-11-19 08:04:33,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 367.5) internal successors, (1470), 4 states have internal predecessors, (1470), 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 08:04:33,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:33,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:33,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:04:33,368 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:04:33,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:33,369 INFO L85 PathProgramCache]: Analyzing trace with hash -778406271, now seen corresponding path program 1 times [2023-11-19 08:04:33,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:33,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694856784] [2023-11-19 08:04:33,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:33,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:33,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:04:33,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:33,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694856784] [2023-11-19 08:04:33,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694856784] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:33,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108658037] [2023-11-19 08:04:33,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:33,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:33,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:33,503 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:33,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:04:33,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:33,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:04:33,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:33,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:04:33,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:33,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:04:33,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108658037] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:33,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:04:33,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2023-11-19 08:04:33,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832994437] [2023-11-19 08:04:33,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:33,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:04:33,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:33,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:04:33,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:04:33,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 362 out of 899 [2023-11-19 08:04:33,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 364.8) internal successors, (1824), 5 states have internal predecessors, (1824), 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 08:04:33,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:33,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 362 of 899 [2023-11-19 08:04:33,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:33,984 INFO L124 PetriNetUnfolderBase]: 115/189 cut-off events. [2023-11-19 08:04:33,985 INFO L125 PetriNetUnfolderBase]: For 410/414 co-relation queries the response was YES. [2023-11-19 08:04:33,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 723 conditions, 189 events. 115/189 cut-off events. For 410/414 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 561 event pairs, 29 based on Foata normal form. 16/205 useless extension candidates. Maximal degree in co-relation 696. Up to 97 conditions per place. [2023-11-19 08:04:33,988 INFO L140 encePairwiseOnDemand]: 893/899 looper letters, 26 selfloop transitions, 8 changer transitions 0/36 dead transitions. [2023-11-19 08:04:33,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 36 transitions, 254 flow [2023-11-19 08:04:33,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:04:33,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:04:33,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1834 transitions. [2023-11-19 08:04:33,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4080088987764182 [2023-11-19 08:04:33,997 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1834 transitions. [2023-11-19 08:04:33,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1834 transitions. [2023-11-19 08:04:33,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:34,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1834 transitions. [2023-11-19 08:04:34,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 366.8) internal successors, (1834), 5 states have internal predecessors, (1834), 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 08:04:34,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 899.0) internal successors, (5394), 6 states have internal predecessors, (5394), 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 08:04:34,023 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 899.0) internal successors, (5394), 6 states have internal predecessors, (5394), 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 08:04:34,023 INFO L175 Difference]: Start difference. First operand has 35 places, 28 transitions, 143 flow. Second operand 5 states and 1834 transitions. [2023-11-19 08:04:34,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 36 transitions, 254 flow [2023-11-19 08:04:34,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 208 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-11-19 08:04:34,028 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 144 flow [2023-11-19 08:04:34,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=144, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2023-11-19 08:04:34,029 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 12 predicate places. [2023-11-19 08:04:34,029 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 144 flow [2023-11-19 08:04:34,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 364.8) internal successors, (1824), 5 states have internal predecessors, (1824), 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 08:04:34,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:34,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:34,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:34,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:34,253 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:04:34,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:34,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1029740687, now seen corresponding path program 1 times [2023-11-19 08:04:34,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:34,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423840798] [2023-11-19 08:04:34,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:34,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:34,375 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 08:04:34,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:34,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423840798] [2023-11-19 08:04:34,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423840798] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:34,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389213588] [2023-11-19 08:04:34,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:34,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:34,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:34,378 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:34,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:04:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:34,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:04:34,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:34,562 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 08:04:34,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:34,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:34,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389213588] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:34,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:04:34,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2023-11-19 08:04:34,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487341992] [2023-11-19 08:04:34,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:34,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:04:34,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:34,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:04:34,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:04:34,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 362 out of 899 [2023-11-19 08:04:34,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 365.0) internal successors, (1825), 5 states have internal predecessors, (1825), 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 08:04:34,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:34,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 362 of 899 [2023-11-19 08:04:34,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:34,815 INFO L124 PetriNetUnfolderBase]: 93/159 cut-off events. [2023-11-19 08:04:34,815 INFO L125 PetriNetUnfolderBase]: For 151/154 co-relation queries the response was YES. [2023-11-19 08:04:34,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 159 events. 93/159 cut-off events. For 151/154 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 411 event pairs, 18 based on Foata normal form. 12/167 useless extension candidates. Maximal degree in co-relation 559. Up to 98 conditions per place. [2023-11-19 08:04:34,818 INFO L140 encePairwiseOnDemand]: 894/899 looper letters, 32 selfloop transitions, 6 changer transitions 0/40 dead transitions. [2023-11-19 08:04:34,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 40 transitions, 276 flow [2023-11-19 08:04:34,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:04:34,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:04:34,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1835 transitions. [2023-11-19 08:04:34,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082313681868743 [2023-11-19 08:04:34,828 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1835 transitions. [2023-11-19 08:04:34,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1835 transitions. [2023-11-19 08:04:34,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:34,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1835 transitions. [2023-11-19 08:04:34,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 367.0) internal successors, (1835), 5 states have internal predecessors, (1835), 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 08:04:34,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 899.0) internal successors, (5394), 6 states have internal predecessors, (5394), 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 08:04:34,850 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 899.0) internal successors, (5394), 6 states have internal predecessors, (5394), 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 08:04:34,850 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 144 flow. Second operand 5 states and 1835 transitions. [2023-11-19 08:04:34,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 40 transitions, 276 flow [2023-11-19 08:04:34,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 40 transitions, 264 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 08:04:34,853 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 168 flow [2023-11-19 08:04:34,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-11-19 08:04:34,855 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2023-11-19 08:04:34,855 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 168 flow [2023-11-19 08:04:34,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 365.0) internal successors, (1825), 5 states have internal predecessors, (1825), 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 08:04:34,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:34,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:34,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:35,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:35,081 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:04:35,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:35,081 INFO L85 PathProgramCache]: Analyzing trace with hash -710759572, now seen corresponding path program 1 times [2023-11-19 08:04:35,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:35,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537765092] [2023-11-19 08:04:35,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:35,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:37,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:37,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537765092] [2023-11-19 08:04:37,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537765092] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:37,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538535360] [2023-11-19 08:04:37,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:37,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:37,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:37,547 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:37,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:04:37,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:37,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-19 08:04:37,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:37,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 08:04:37,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 08:04:37,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 08:04:38,169 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 97 treesize of output 61 [2023-11-19 08:04:38,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:38,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:39,112 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~A~0.offset (* c_~i~0 4))) (.cse4 (+ c_~A~0.offset (* c_~j~0 4)))) (and (forall ((v_ArrVal_106 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_106) c_~A~0.base))) (let ((.cse0 (select .cse2 .cse4)) (.cse1 (select .cse2 .cse3))) (or (< (+ c_~bag2~0 .cse0 2147483648) 0) (= (+ c_~bag1~0 .cse1 c_~sum1~0) (+ c_~bag2~0 .cse0 c_~sum2~0)) (< (+ c_~bag1~0 .cse1 2147483648) 0) (< 2147483647 (+ c_~bag2~0 .cse0)) (< 2147483647 (+ c_~bag1~0 .cse1)))))) (or (forall ((v_ArrVal_106 (Array Int Int))) (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_106) c_~A~0.base))) (let ((.cse5 (select .cse6 .cse4))) (or (< (+ c_~bag2~0 .cse5 2147483648) 0) (= (+ c_~bag1~0 (select .cse6 .cse3) c_~sum1~0) (+ c_~bag2~0 .cse5 c_~sum2~0)) (< 2147483647 (+ c_~bag2~0 .cse5)))))) (< 2147483647 (+ c_~bag1~0 c_~sum1~0)) (< (+ c_~bag1~0 c_~sum1~0 2147483648) 0)))) is different from false [2023-11-19 08:04:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-11-19 08:04:39,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538535360] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:39,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:04:39,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-11-19 08:04:39,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550465406] [2023-11-19 08:04:39,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:39,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 08:04:39,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:39,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 08:04:39,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=349, Unknown=1, NotChecked=38, Total=462 [2023-11-19 08:04:39,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 899 [2023-11-19 08:04:39,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 168 flow. Second operand has 22 states, 22 states have (on average 308.04545454545456) internal successors, (6777), 22 states have internal predecessors, (6777), 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 08:04:39,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:39,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 899 [2023-11-19 08:04:39,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:40,273 INFO L124 PetriNetUnfolderBase]: 125/218 cut-off events. [2023-11-19 08:04:40,273 INFO L125 PetriNetUnfolderBase]: For 230/232 co-relation queries the response was YES. [2023-11-19 08:04:40,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 218 events. 125/218 cut-off events. For 230/232 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 679 event pairs, 3 based on Foata normal form. 3/217 useless extension candidates. Maximal degree in co-relation 838. Up to 135 conditions per place. [2023-11-19 08:04:40,276 INFO L140 encePairwiseOnDemand]: 890/899 looper letters, 40 selfloop transitions, 22 changer transitions 4/68 dead transitions. [2023-11-19 08:04:40,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 68 transitions, 458 flow [2023-11-19 08:04:40,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 08:04:40,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 08:04:40,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3117 transitions. [2023-11-19 08:04:40,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34671857619577306 [2023-11-19 08:04:40,291 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3117 transitions. [2023-11-19 08:04:40,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3117 transitions. [2023-11-19 08:04:40,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:40,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3117 transitions. [2023-11-19 08:04:40,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 311.7) internal successors, (3117), 10 states have internal predecessors, (3117), 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 08:04:40,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 899.0) internal successors, (9889), 11 states have internal predecessors, (9889), 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 08:04:40,326 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 899.0) internal successors, (9889), 11 states have internal predecessors, (9889), 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 08:04:40,326 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 168 flow. Second operand 10 states and 3117 transitions. [2023-11-19 08:04:40,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 68 transitions, 458 flow [2023-11-19 08:04:40,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 68 transitions, 455 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:04:40,331 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 333 flow [2023-11-19 08:04:40,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=333, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2023-11-19 08:04:40,332 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2023-11-19 08:04:40,332 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 333 flow [2023-11-19 08:04:40,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 308.04545454545456) internal successors, (6777), 22 states have internal predecessors, (6777), 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 08:04:40,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:40,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:40,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:40,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:40,558 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:04:40,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:40,558 INFO L85 PathProgramCache]: Analyzing trace with hash 125954280, now seen corresponding path program 2 times [2023-11-19 08:04:40,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:40,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122518259] [2023-11-19 08:04:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:40,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:40,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:42,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:42,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122518259] [2023-11-19 08:04:42,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122518259] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:42,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413563370] [2023-11-19 08:04:42,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:04:42,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:42,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:42,363 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:42,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:04:42,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:04:42,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:04:42,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 08:04:42,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:42,836 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 97 treesize of output 61 [2023-11-19 08:04:42,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:04:42,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:43,303 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:04:43,305 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 143 treesize of output 111 [2023-11-19 08:04:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:04:43,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413563370] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:43,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:04:43,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 17 [2023-11-19 08:04:43,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848567928] [2023-11-19 08:04:43,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:43,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 08:04:43,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:43,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 08:04:43,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-11-19 08:04:44,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 899 [2023-11-19 08:04:44,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 333 flow. Second operand has 18 states, 18 states have (on average 340.3333333333333) internal successors, (6126), 18 states have internal predecessors, (6126), 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 08:04:44,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:44,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 899 [2023-11-19 08:04:44,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:45,265 INFO L124 PetriNetUnfolderBase]: 137/238 cut-off events. [2023-11-19 08:04:45,265 INFO L125 PetriNetUnfolderBase]: For 486/488 co-relation queries the response was YES. [2023-11-19 08:04:45,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1152 conditions, 238 events. 137/238 cut-off events. For 486/488 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 766 event pairs, 7 based on Foata normal form. 3/237 useless extension candidates. Maximal degree in co-relation 1119. Up to 162 conditions per place. [2023-11-19 08:04:45,269 INFO L140 encePairwiseOnDemand]: 890/899 looper letters, 39 selfloop transitions, 24 changer transitions 4/69 dead transitions. [2023-11-19 08:04:45,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 589 flow [2023-11-19 08:04:45,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 08:04:45,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 08:04:45,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3436 transitions. [2023-11-19 08:04:45,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38220244716351504 [2023-11-19 08:04:45,284 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3436 transitions. [2023-11-19 08:04:45,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3436 transitions. [2023-11-19 08:04:45,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:45,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3436 transitions. [2023-11-19 08:04:45,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 343.6) internal successors, (3436), 10 states have internal predecessors, (3436), 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 08:04:45,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 899.0) internal successors, (9889), 11 states have internal predecessors, (9889), 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 08:04:45,316 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 899.0) internal successors, (9889), 11 states have internal predecessors, (9889), 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 08:04:45,316 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 333 flow. Second operand 10 states and 3436 transitions. [2023-11-19 08:04:45,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 589 flow [2023-11-19 08:04:45,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 69 transitions, 545 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-11-19 08:04:45,322 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 417 flow [2023-11-19 08:04:45,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=417, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2023-11-19 08:04:45,325 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 34 predicate places. [2023-11-19 08:04:45,325 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 417 flow [2023-11-19 08:04:45,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 340.3333333333333) internal successors, (6126), 18 states have internal predecessors, (6126), 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 08:04:45,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:45,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:45,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:45,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 08:04:45,545 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:04:45,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:45,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1703189086, now seen corresponding path program 3 times [2023-11-19 08:04:45,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:45,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688072020] [2023-11-19 08:04:45,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:45,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:46,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:46,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:46,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688072020] [2023-11-19 08:04:46,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688072020] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:46,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555894807] [2023-11-19 08:04:46,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 08:04:46,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:46,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:46,789 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:46,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:04:46,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 08:04:46,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:04:46,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 08:04:46,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:47,269 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 97 treesize of output 61 [2023-11-19 08:04:47,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:04:47,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:47,813 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:04:47,813 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 143 treesize of output 111 [2023-11-19 08:04:48,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:04:48,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555894807] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:48,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:04:48,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 18 [2023-11-19 08:04:48,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090086701] [2023-11-19 08:04:48,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:48,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 08:04:48,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:48,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 08:04:48,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-11-19 08:04:50,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 899 [2023-11-19 08:04:50,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 417 flow. Second operand has 19 states, 19 states have (on average 340.2105263157895) internal successors, (6464), 19 states have internal predecessors, (6464), 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 08:04:50,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:50,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 899 [2023-11-19 08:04:50,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:50,681 INFO L124 PetriNetUnfolderBase]: 142/247 cut-off events. [2023-11-19 08:04:50,682 INFO L125 PetriNetUnfolderBase]: For 679/681 co-relation queries the response was YES. [2023-11-19 08:04:50,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1244 conditions, 247 events. 142/247 cut-off events. For 679/681 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 815 event pairs, 5 based on Foata normal form. 3/246 useless extension candidates. Maximal degree in co-relation 1207. Up to 170 conditions per place. [2023-11-19 08:04:50,686 INFO L140 encePairwiseOnDemand]: 890/899 looper letters, 42 selfloop transitions, 24 changer transitions 4/72 dead transitions. [2023-11-19 08:04:50,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 72 transitions, 644 flow [2023-11-19 08:04:50,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 08:04:50,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 08:04:50,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3437 transitions. [2023-11-19 08:04:50,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38231368186874304 [2023-11-19 08:04:50,703 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3437 transitions. [2023-11-19 08:04:50,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3437 transitions. [2023-11-19 08:04:50,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:50,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3437 transitions. [2023-11-19 08:04:50,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 343.7) internal successors, (3437), 10 states have internal predecessors, (3437), 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 08:04:50,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 899.0) internal successors, (9889), 11 states have internal predecessors, (9889), 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 08:04:50,736 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 899.0) internal successors, (9889), 11 states have internal predecessors, (9889), 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 08:04:50,737 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 417 flow. Second operand 10 states and 3437 transitions. [2023-11-19 08:04:50,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 72 transitions, 644 flow [2023-11-19 08:04:50,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 72 transitions, 579 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-11-19 08:04:50,745 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 425 flow [2023-11-19 08:04:50,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=425, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2023-11-19 08:04:50,749 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 37 predicate places. [2023-11-19 08:04:50,749 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 425 flow [2023-11-19 08:04:50,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 340.2105263157895) internal successors, (6464), 19 states have internal predecessors, (6464), 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 08:04:50,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:50,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:50,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:50,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 08:04:50,965 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:04:50,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:50,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1830621128, now seen corresponding path program 4 times [2023-11-19 08:04:50,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:50,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174215728] [2023-11-19 08:04:50,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:50,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:51,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:52,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:52,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174215728] [2023-11-19 08:04:52,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174215728] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:52,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580981400] [2023-11-19 08:04:52,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 08:04:52,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:52,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:52,485 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:52,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:04:52,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 08:04:52,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:04:52,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-19 08:04:52,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:52,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 08:04:52,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 08:04:52,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 08:04:53,004 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 67 treesize of output 47 [2023-11-19 08:04:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:53,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:53,943 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~A~0.offset (* c_~i~0 4))) (.cse4 (+ c_~A~0.offset (* c_~j~0 4)))) (and (forall ((v_ArrVal_182 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_182) c_~A~0.base))) (let ((.cse1 (select .cse2 .cse4)) (.cse0 (select .cse2 .cse3))) (or (< 2147483647 (+ c_~bag1~0 .cse0)) (< 2147483647 (+ .cse1 c_~bag2~0)) (< (+ c_~bag1~0 .cse0 2147483648) 0) (< (+ .cse1 c_~bag2~0 2147483648) 0) (= (+ .cse1 c_~bag2~0 c_~sum2~0) (+ c_~bag1~0 c_~sum1~0 .cse0)))))) (or (< 2147483647 (+ c_~bag1~0 c_~sum1~0)) (< (+ c_~bag1~0 c_~sum1~0 2147483648) 0) (forall ((v_ArrVal_182 (Array Int Int))) (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_182) c_~A~0.base))) (let ((.cse5 (select .cse6 .cse4))) (or (< 2147483647 (+ .cse5 c_~bag2~0)) (< (+ .cse5 c_~bag2~0 2147483648) 0) (= (+ .cse5 c_~bag2~0 c_~sum2~0) (+ c_~bag1~0 c_~sum1~0 (select .cse6 .cse3)))))))))) is different from false [2023-11-19 08:04:54,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-11-19 08:04:54,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580981400] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:54,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:04:54,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-11-19 08:04:54,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462669563] [2023-11-19 08:04:54,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:54,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 08:04:54,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:54,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 08:04:54,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=346, Unknown=1, NotChecked=38, Total=462 [2023-11-19 08:04:54,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 899 [2023-11-19 08:04:54,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 425 flow. Second operand has 22 states, 22 states have (on average 307.95454545454544) internal successors, (6775), 22 states have internal predecessors, (6775), 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 08:04:54,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:54,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 899 [2023-11-19 08:04:54,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:55,049 INFO L124 PetriNetUnfolderBase]: 144/257 cut-off events. [2023-11-19 08:04:55,050 INFO L125 PetriNetUnfolderBase]: For 735/737 co-relation queries the response was YES. [2023-11-19 08:04:55,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1297 conditions, 257 events. 144/257 cut-off events. For 735/737 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 889 event pairs, 8 based on Foata normal form. 3/256 useless extension candidates. Maximal degree in co-relation 1259. Up to 183 conditions per place. [2023-11-19 08:04:55,054 INFO L140 encePairwiseOnDemand]: 891/899 looper letters, 43 selfloop transitions, 20 changer transitions 4/69 dead transitions. [2023-11-19 08:04:55,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 69 transitions, 644 flow [2023-11-19 08:04:55,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 08:04:55,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-19 08:04:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2801 transitions. [2023-11-19 08:04:55,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34618712149301695 [2023-11-19 08:04:55,066 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2801 transitions. [2023-11-19 08:04:55,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2801 transitions. [2023-11-19 08:04:55,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:55,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2801 transitions. [2023-11-19 08:04:55,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 311.22222222222223) internal successors, (2801), 9 states have internal predecessors, (2801), 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 08:04:55,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 899.0) internal successors, (8990), 10 states have internal predecessors, (8990), 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 08:04:55,135 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 899.0) internal successors, (8990), 10 states have internal predecessors, (8990), 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 08:04:55,135 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 425 flow. Second operand 9 states and 2801 transitions. [2023-11-19 08:04:55,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 69 transitions, 644 flow [2023-11-19 08:04:55,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 69 transitions, 561 flow, removed 9 selfloop flow, removed 10 redundant places. [2023-11-19 08:04:55,145 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 424 flow [2023-11-19 08:04:55,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=424, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2023-11-19 08:04:55,147 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 37 predicate places. [2023-11-19 08:04:55,147 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 424 flow [2023-11-19 08:04:55,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 307.95454545454544) internal successors, (6775), 22 states have internal predecessors, (6775), 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 08:04:55,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:55,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:55,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:55,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 08:04:55,373 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:04:55,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:55,374 INFO L85 PathProgramCache]: Analyzing trace with hash 209764836, now seen corresponding path program 5 times [2023-11-19 08:04:55,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:55,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228395603] [2023-11-19 08:04:55,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:55,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:55,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:56,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:56,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228395603] [2023-11-19 08:04:56,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228395603] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:56,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584506009] [2023-11-19 08:04:56,810 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 08:04:56,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:56,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:56,822 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:56,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104ab802-f7cc-498a-8d52-380404404fcb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:04:56,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-19 08:04:56,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:04:56,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 08:04:56,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:57,246 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 67 treesize of output 47 [2023-11-19 08:04:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:04:57,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:57,642 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:04:57,642 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 248 treesize of output 160