./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:03:54,389 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:03:54,474 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:03:54,485 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:03:54,486 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:03:54,531 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:03:54,532 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:03:54,533 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:03:54,535 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:03:54,539 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:03:54,540 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:03:54,541 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:03:54,541 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:03:54,542 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:03:54,542 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:03:54,542 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:03:54,543 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:03:54,543 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:03:54,544 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:03:54,544 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:03:54,544 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:03:54,545 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:03:54,545 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:03:54,547 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:03:54,547 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:03:54,548 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:03:54,549 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:03:54,549 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:03:54,549 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:03:54,550 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:03:54,551 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:03:54,551 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:03:54,552 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:03:54,552 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:03:54,552 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:03:54,552 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:03:54,553 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:03:54,553 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:03:54,553 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:03:54,553 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_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 [2023-11-12 02:03:54,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:03:54,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:03:54,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:03:54,840 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:03:54,840 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:03:54,841 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2023-11-12 02:03:57,917 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:03:58,143 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:03:58,144 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2023-11-12 02:03:58,159 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/data/7b96fd51a/02463078922a40e0ba1aa358edaf419f/FLAG09dfa0bf0 [2023-11-12 02:03:58,180 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/data/7b96fd51a/02463078922a40e0ba1aa358edaf419f [2023-11-12 02:03:58,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:03:58,184 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:03:58,185 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:03:58,186 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:03:58,194 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:03:58,197 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:03:58" (1/1) ... [2023-11-12 02:03:58,199 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cf36112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:58, skipping insertion in model container [2023-11-12 02:03:58,200 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:03:58" (1/1) ... [2023-11-12 02:03:58,237 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:03:58,431 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_d2040240-d8f7-45a8-9f70-1e78918c5b1f/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c[4955,4968] [2023-11-12 02:03:58,442 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:03:58,453 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:03:58,492 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_d2040240-d8f7-45a8-9f70-1e78918c5b1f/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c[4955,4968] [2023-11-12 02:03:58,496 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:03:58,520 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:03:58,521 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:58 WrapperNode [2023-11-12 02:03:58,521 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:03:58,524 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:03:58,524 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:03:58,524 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:03:58,536 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:58" (1/1) ... [2023-11-12 02:03:58,547 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:58" (1/1) ... [2023-11-12 02:03:58,605 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 21, calls inlined = 29, statements flattened = 409 [2023-11-12 02:03:58,606 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:03:58,608 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:03:58,608 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:03:58,608 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:03:58,618 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:58" (1/1) ... [2023-11-12 02:03:58,618 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:58" (1/1) ... [2023-11-12 02:03:58,624 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:58" (1/1) ... [2023-11-12 02:03:58,624 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:58" (1/1) ... [2023-11-12 02:03:58,641 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:58" (1/1) ... [2023-11-12 02:03:58,647 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:58" (1/1) ... [2023-11-12 02:03:58,651 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:58" (1/1) ... [2023-11-12 02:03:58,654 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:58" (1/1) ... [2023-11-12 02:03:58,659 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:03:58,660 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:03:58,661 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:03:58,661 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:03:58,661 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:58" (1/1) ... [2023-11-12 02:03:58,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:03:58,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:58,715 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:03:58,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:03:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:03:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:03:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:03:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:03:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:03:58,762 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:03:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:03:58,763 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:03:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:03:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:03:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:03:58,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:03:58,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:03:58,765 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:03:58,881 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:03:58,883 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:03:59,524 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:03:59,547 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:03:59,547 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-12 02:03:59,550 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:03:59 BoogieIcfgContainer [2023-11-12 02:03:59,551 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:03:59,553 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:03:59,553 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:03:59,557 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:03:59,557 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:03:58" (1/3) ... [2023-11-12 02:03:59,557 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b20a0b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:03:59, skipping insertion in model container [2023-11-12 02:03:59,558 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:58" (2/3) ... [2023-11-12 02:03:59,558 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b20a0b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:03:59, skipping insertion in model container [2023-11-12 02:03:59,558 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:03:59" (3/3) ... [2023-11-12 02:03:59,559 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2023-11-12 02:03:59,567 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:03:59,575 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:03:59,575 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:03:59,575 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:03:59,770 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:03:59,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 492 places, 534 transitions, 1082 flow [2023-11-12 02:04:00,092 INFO L124 PetriNetUnfolderBase]: 49/532 cut-off events. [2023-11-12 02:04:00,092 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:04:00,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 541 conditions, 532 events. 49/532 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1533 event pairs, 0 based on Foata normal form. 0/482 useless extension candidates. Maximal degree in co-relation 359. Up to 2 conditions per place. [2023-11-12 02:04:00,110 INFO L82 GeneralOperation]: Start removeDead. Operand has 492 places, 534 transitions, 1082 flow [2023-11-12 02:04:00,122 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 481 places, 523 transitions, 1058 flow [2023-11-12 02:04:00,125 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:04:00,136 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 481 places, 523 transitions, 1058 flow [2023-11-12 02:04:00,138 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 481 places, 523 transitions, 1058 flow [2023-11-12 02:04:00,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 481 places, 523 transitions, 1058 flow [2023-11-12 02:04:00,325 INFO L124 PetriNetUnfolderBase]: 49/523 cut-off events. [2023-11-12 02:04:00,325 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:04:00,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 532 conditions, 523 events. 49/523 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1515 event pairs, 0 based on Foata normal form. 0/474 useless extension candidates. Maximal degree in co-relation 359. Up to 2 conditions per place. [2023-11-12 02:04:00,376 INFO L119 LiptonReduction]: Number of co-enabled transitions 65772 [2023-11-12 02:04:25,782 INFO L134 LiptonReduction]: Checked pairs total: 60404 [2023-11-12 02:04:25,782 INFO L136 LiptonReduction]: Total number of compositions: 677 [2023-11-12 02:04:25,819 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:04:25,829 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;@6fd9473b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:04:25,829 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-12 02:04:25,839 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:04:25,839 INFO L124 PetriNetUnfolderBase]: 7/28 cut-off events. [2023-11-12 02:04:25,839 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:04:25,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:04:25,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:04:25,841 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:04:25,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:25,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1312617923, now seen corresponding path program 1 times [2023-11-12 02:04:25,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:25,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886264659] [2023-11-12 02:04:25,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:25,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:26,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:04:26,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:26,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886264659] [2023-11-12 02:04:26,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886264659] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:04:26,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:04:26,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:04:26,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50453617] [2023-11-12 02:04:26,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:04:26,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:04:26,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:26,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:04:26,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:04:26,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 492 out of 1211 [2023-11-12 02:04:26,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 496.3333333333333) internal successors, (1489), 3 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) [2023-11-12 02:04:26,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:04:26,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 492 of 1211 [2023-11-12 02:04:26,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:04:26,634 INFO L124 PetriNetUnfolderBase]: 157/250 cut-off events. [2023-11-12 02:04:26,635 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-12 02:04:26,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 250 events. 157/250 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 640 event pairs, 87 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 472. Up to 249 conditions per place. [2023-11-12 02:04:26,638 INFO L140 encePairwiseOnDemand]: 1206/1211 looper letters, 27 selfloop transitions, 4 changer transitions 0/31 dead transitions. [2023-11-12 02:04:26,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 31 transitions, 136 flow [2023-11-12 02:04:26,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:04:26,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:04:26,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1509 transitions. [2023-11-12 02:04:26,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153592072667217 [2023-11-12 02:04:26,665 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1509 transitions. [2023-11-12 02:04:26,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1509 transitions. [2023-11-12 02:04:26,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:04:26,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1509 transitions. [2023-11-12 02:04:26,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 503.0) internal successors, (1509), 3 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:26,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1211.0) internal successors, (4844), 4 states have internal predecessors, (4844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:26,702 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1211.0) internal successors, (4844), 4 states have internal predecessors, (4844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:26,704 INFO L175 Difference]: Start difference. First operand has 29 places, 29 transitions, 70 flow. Second operand 3 states and 1509 transitions. [2023-11-12 02:04:26,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 31 transitions, 136 flow [2023-11-12 02:04:26,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 31 transitions, 128 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:04:26,711 INFO L231 Difference]: Finished difference. Result has 28 places, 31 transitions, 84 flow [2023-11-12 02:04:26,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1211, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=28, PETRI_TRANSITIONS=31} [2023-11-12 02:04:26,717 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2023-11-12 02:04:26,718 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 31 transitions, 84 flow [2023-11-12 02:04:26,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 496.3333333333333) internal successors, (1489), 3 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) [2023-11-12 02:04:26,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:04:26,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:04:26,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:04:26,721 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:04:26,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:26,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1386370095, now seen corresponding path program 1 times [2023-11-12 02:04:26,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:26,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90327739] [2023-11-12 02:04:26,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:26,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:26,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:04:26,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:26,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90327739] [2023-11-12 02:04:26,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90327739] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:04:26,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954366292] [2023-11-12 02:04:26,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:26,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:26,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:26,948 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:04:26,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:04:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:27,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:04:27,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:04:27,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:04:27,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:04:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:04:27,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954366292] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:04:27,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:04:27,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-12 02:04:27,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774800391] [2023-11-12 02:04:27,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:04:27,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:04:27,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:27,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:04:27,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:04:27,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 488 out of 1211 [2023-11-12 02:04:27,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 31 transitions, 84 flow. Second operand has 8 states, 8 states have (on average 490.625) internal successors, (3925), 8 states have internal predecessors, (3925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:27,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:04:27,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 488 of 1211 [2023-11-12 02:04:27,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:04:27,588 INFO L124 PetriNetUnfolderBase]: 157/256 cut-off events. [2023-11-12 02:04:27,588 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:04:27,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 256 events. 157/256 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 637 event pairs, 87 based on Foata normal form. 3/190 useless extension candidates. Maximal degree in co-relation 512. Up to 249 conditions per place. [2023-11-12 02:04:27,590 INFO L140 encePairwiseOnDemand]: 1206/1211 looper letters, 27 selfloop transitions, 10 changer transitions 0/37 dead transitions. [2023-11-12 02:04:27,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 182 flow [2023-11-12 02:04:27,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:04:27,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:04:27,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2971 transitions. [2023-11-12 02:04:27,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40889072391962566 [2023-11-12 02:04:27,604 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2971 transitions. [2023-11-12 02:04:27,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2971 transitions. [2023-11-12 02:04:27,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:04:27,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2971 transitions. [2023-11-12 02:04:27,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 495.1666666666667) internal successors, (2971), 6 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:27,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1211.0) internal successors, (8477), 7 states have internal predecessors, (8477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:27,641 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1211.0) internal successors, (8477), 7 states have internal predecessors, (8477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:27,641 INFO L175 Difference]: Start difference. First operand has 28 places, 31 transitions, 84 flow. Second operand 6 states and 2971 transitions. [2023-11-12 02:04:27,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 182 flow [2023-11-12 02:04:27,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 37 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:04:27,644 INFO L231 Difference]: Finished difference. Result has 35 places, 37 transitions, 146 flow [2023-11-12 02:04:27,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1211, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=35, PETRI_TRANSITIONS=37} [2023-11-12 02:04:27,645 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 6 predicate places. [2023-11-12 02:04:27,645 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 37 transitions, 146 flow [2023-11-12 02:04:27,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 490.625) internal successors, (3925), 8 states have internal predecessors, (3925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:27,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:04:27,649 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:04:27,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 02:04:27,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:27,855 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:04:27,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:27,856 INFO L85 PathProgramCache]: Analyzing trace with hash -36876971, now seen corresponding path program 2 times [2023-11-12 02:04:27,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:27,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910416937] [2023-11-12 02:04:27,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:27,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:28,142 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:04:28,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:28,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910416937] [2023-11-12 02:04:28,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910416937] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:04:28,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371430112] [2023-11-12 02:04:28,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:04:28,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:28,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:28,145 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:04:28,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:04:28,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:04:28,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:04:28,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:04:28,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:04:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-12 02:04:28,973 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:04:28,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371430112] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:04:28,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:04:28,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-11-12 02:04:28,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033706997] [2023-11-12 02:04:28,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:04:28,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:04:28,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:28,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:04:28,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:04:29,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 482 out of 1211 [2023-11-12 02:04:29,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 37 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 485.75) internal successors, (1943), 4 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:29,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:04:29,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 482 of 1211 [2023-11-12 02:04:29,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:04:29,437 INFO L124 PetriNetUnfolderBase]: 165/285 cut-off events. [2023-11-12 02:04:29,438 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:04:29,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 285 events. 165/285 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 843 event pairs, 87 based on Foata normal form. 1/213 useless extension candidates. Maximal degree in co-relation 562. Up to 249 conditions per place. [2023-11-12 02:04:29,440 INFO L140 encePairwiseOnDemand]: 1207/1211 looper letters, 43 selfloop transitions, 1 changer transitions 7/51 dead transitions. [2023-11-12 02:04:29,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 51 transitions, 281 flow [2023-11-12 02:04:29,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:04:29,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:04:29,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1973 transitions. [2023-11-12 02:04:29,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.407308009909166 [2023-11-12 02:04:29,450 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1973 transitions. [2023-11-12 02:04:29,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1973 transitions. [2023-11-12 02:04:29,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:04:29,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1973 transitions. [2023-11-12 02:04:29,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 493.25) internal successors, (1973), 4 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:29,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1211.0) internal successors, (6055), 5 states have internal predecessors, (6055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:29,477 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1211.0) internal successors, (6055), 5 states have internal predecessors, (6055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:29,477 INFO L175 Difference]: Start difference. First operand has 35 places, 37 transitions, 146 flow. Second operand 4 states and 1973 transitions. [2023-11-12 02:04:29,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 51 transitions, 281 flow [2023-11-12 02:04:29,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 51 transitions, 265 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-12 02:04:29,481 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 139 flow [2023-11-12 02:04:29,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1211, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2023-11-12 02:04:29,482 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 10 predicate places. [2023-11-12 02:04:29,482 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 139 flow [2023-11-12 02:04:29,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 485.75) internal successors, (1943), 4 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:29,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:04:29,484 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:04:29,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:04:29,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-12 02:04:29,691 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:04:29,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:29,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2065327171, now seen corresponding path program 3 times [2023-11-12 02:04:29,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:29,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635728540] [2023-11-12 02:04:29,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:29,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:04:29,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:29,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635728540] [2023-11-12 02:04:29,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635728540] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:04:29,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485018573] [2023-11-12 02:04:29,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:04:29,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:29,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:29,926 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:04:29,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:04:30,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-12 02:04:30,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:04:30,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:04:30,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:04:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-12 02:04:30,459 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:04:30,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485018573] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:04:30,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:04:30,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-11-12 02:04:30,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212122701] [2023-11-12 02:04:30,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:04:30,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:04:30,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:30,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:04:30,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:04:30,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 482 out of 1211 [2023-11-12 02:04:30,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 485.75) internal successors, (1943), 4 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:30,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:04:30,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 482 of 1211 [2023-11-12 02:04:30,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:04:30,995 INFO L124 PetriNetUnfolderBase]: 173/317 cut-off events. [2023-11-12 02:04:30,996 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-11-12 02:04:30,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 317 events. 173/317 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1074 event pairs, 96 based on Foata normal form. 3/251 useless extension candidates. Maximal degree in co-relation 720. Up to 256 conditions per place. [2023-11-12 02:04:31,000 INFO L140 encePairwiseOnDemand]: 1207/1211 looper letters, 51 selfloop transitions, 1 changer transitions 5/57 dead transitions. [2023-11-12 02:04:31,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 57 transitions, 302 flow [2023-11-12 02:04:31,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:04:31,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:04:31,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1979 transitions. [2023-11-12 02:04:31,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40854665565648224 [2023-11-12 02:04:31,015 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1979 transitions. [2023-11-12 02:04:31,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1979 transitions. [2023-11-12 02:04:31,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:04:31,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1979 transitions. [2023-11-12 02:04:31,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 494.75) internal successors, (1979), 4 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:31,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1211.0) internal successors, (6055), 5 states have internal predecessors, (6055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:31,037 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1211.0) internal successors, (6055), 5 states have internal predecessors, (6055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:31,037 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 139 flow. Second operand 4 states and 1979 transitions. [2023-11-12 02:04:31,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 57 transitions, 302 flow [2023-11-12 02:04:31,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 57 transitions, 296 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-12 02:04:31,044 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 145 flow [2023-11-12 02:04:31,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1211, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-11-12 02:04:31,046 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 12 predicate places. [2023-11-12 02:04:31,047 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 145 flow [2023-11-12 02:04:31,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 485.75) internal successors, (1943), 4 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:31,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:04:31,048 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:04:31,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:04:31,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:31,257 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:04:31,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:31,257 INFO L85 PathProgramCache]: Analyzing trace with hash -2115875563, now seen corresponding path program 1 times [2023-11-12 02:04:31,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:31,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046371042] [2023-11-12 02:04:31,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:31,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:31,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-12 02:04:31,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:31,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046371042] [2023-11-12 02:04:31,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046371042] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:04:31,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:04:31,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:04:31,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808328791] [2023-11-12 02:04:31,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:04:31,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:04:31,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:31,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:04:31,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:04:31,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 498 out of 1211 [2023-11-12 02:04:31,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 503.3333333333333) internal successors, (1510), 3 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:31,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:04:31,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 498 of 1211 [2023-11-12 02:04:31,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:04:31,617 INFO L124 PetriNetUnfolderBase]: 131/238 cut-off events. [2023-11-12 02:04:31,617 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2023-11-12 02:04:31,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 238 events. 131/238 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 664 event pairs, 40 based on Foata normal form. 24/223 useless extension candidates. Maximal degree in co-relation 554. Up to 209 conditions per place. [2023-11-12 02:04:31,619 INFO L140 encePairwiseOnDemand]: 1207/1211 looper letters, 38 selfloop transitions, 2 changer transitions 4/44 dead transitions. [2023-11-12 02:04:31,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 44 transitions, 253 flow [2023-11-12 02:04:31,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:04:31,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:04:31,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1532 transitions. [2023-11-12 02:04:31,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4216900633085604 [2023-11-12 02:04:31,626 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1532 transitions. [2023-11-12 02:04:31,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1532 transitions. [2023-11-12 02:04:31,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:04:31,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1532 transitions. [2023-11-12 02:04:31,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 510.6666666666667) internal successors, (1532), 3 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:31,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1211.0) internal successors, (4844), 4 states have internal predecessors, (4844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:31,642 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1211.0) internal successors, (4844), 4 states have internal predecessors, (4844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:31,642 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 145 flow. Second operand 3 states and 1532 transitions. [2023-11-12 02:04:31,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 44 transitions, 253 flow [2023-11-12 02:04:31,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 44 transitions, 250 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-12 02:04:31,645 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 148 flow [2023-11-12 02:04:31,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1211, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-11-12 02:04:31,646 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 12 predicate places. [2023-11-12 02:04:31,647 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 148 flow [2023-11-12 02:04:31,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 503.3333333333333) internal successors, (1510), 3 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:31,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:04:31,648 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:04:31,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:04:31,649 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:04:31,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:31,649 INFO L85 PathProgramCache]: Analyzing trace with hash -141681732, now seen corresponding path program 1 times [2023-11-12 02:04:31,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:31,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693203978] [2023-11-12 02:04:31,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:31,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:04:31,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:31,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693203978] [2023-11-12 02:04:31,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693203978] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:04:31,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57321131] [2023-11-12 02:04:31,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:31,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:31,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:31,856 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:04:31,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:04:32,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:32,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:04:32,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:04:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:04:32,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:04:32,214 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:04:32,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57321131] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:04:32,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:04:32,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-11-12 02:04:32,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164940966] [2023-11-12 02:04:32,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:04:32,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-12 02:04:32,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:32,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-12 02:04:32,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:04:32,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 488 out of 1211 [2023-11-12 02:04:32,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 148 flow. Second operand has 17 states, 17 states have (on average 489.88235294117646) internal successors, (8328), 17 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:32,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:04:32,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 488 of 1211 [2023-11-12 02:04:32,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:04:32,741 INFO L124 PetriNetUnfolderBase]: 127/228 cut-off events. [2023-11-12 02:04:32,741 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2023-11-12 02:04:32,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573 conditions, 228 events. 127/228 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 599 event pairs, 83 based on Foata normal form. 1/190 useless extension candidates. Maximal degree in co-relation 509. Up to 219 conditions per place. [2023-11-12 02:04:32,744 INFO L140 encePairwiseOnDemand]: 1206/1211 looper letters, 27 selfloop transitions, 12 changer transitions 0/39 dead transitions. [2023-11-12 02:04:32,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 238 flow [2023-11-12 02:04:32,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:04:32,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:04:32,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3455 transitions. [2023-11-12 02:04:32,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075734339978766 [2023-11-12 02:04:32,760 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3455 transitions. [2023-11-12 02:04:32,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3455 transitions. [2023-11-12 02:04:32,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:04:32,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3455 transitions. [2023-11-12 02:04:32,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 493.57142857142856) internal successors, (3455), 7 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:32,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1211.0) internal successors, (9688), 8 states have internal predecessors, (9688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:32,797 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1211.0) internal successors, (9688), 8 states have internal predecessors, (9688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:32,797 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 148 flow. Second operand 7 states and 3455 transitions. [2023-11-12 02:04:32,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 238 flow [2023-11-12 02:04:32,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 230 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-12 02:04:32,800 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 186 flow [2023-11-12 02:04:32,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1211, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=186, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-11-12 02:04:32,801 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 15 predicate places. [2023-11-12 02:04:32,802 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 186 flow [2023-11-12 02:04:32,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 489.88235294117646) internal successors, (8328), 17 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:32,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:04:32,806 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:04:32,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:04:33,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:33,013 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:04:33,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:33,013 INFO L85 PathProgramCache]: Analyzing trace with hash -875039960, now seen corresponding path program 2 times [2023-11-12 02:04:33,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:33,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312307442] [2023-11-12 02:04:33,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:33,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:33,247 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 02:04:33,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:33,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312307442] [2023-11-12 02:04:33,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312307442] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:04:33,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:04:33,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:04:33,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377034615] [2023-11-12 02:04:33,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:04:33,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:04:33,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:33,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:04:33,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:04:33,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 497 out of 1211 [2023-11-12 02:04:33,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 502.6666666666667) internal successors, (1508), 3 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:33,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:04:33,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 497 of 1211 [2023-11-12 02:04:33,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:04:33,518 INFO L124 PetriNetUnfolderBase]: 201/350 cut-off events. [2023-11-12 02:04:33,518 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-11-12 02:04:33,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 822 conditions, 350 events. 201/350 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1003 event pairs, 83 based on Foata normal form. 0/292 useless extension candidates. Maximal degree in co-relation 747. Up to 237 conditions per place. [2023-11-12 02:04:33,521 INFO L140 encePairwiseOnDemand]: 1207/1211 looper letters, 48 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2023-11-12 02:04:33,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 319 flow [2023-11-12 02:04:33,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:04:33,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:04:33,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1532 transitions. [2023-11-12 02:04:33,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4216900633085604 [2023-11-12 02:04:33,528 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1532 transitions. [2023-11-12 02:04:33,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1532 transitions. [2023-11-12 02:04:33,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:04:33,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1532 transitions. [2023-11-12 02:04:33,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 510.6666666666667) internal successors, (1532), 3 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:33,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1211.0) internal successors, (4844), 4 states have internal predecessors, (4844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:33,542 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1211.0) internal successors, (4844), 4 states have internal predecessors, (4844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:33,542 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 186 flow. Second operand 3 states and 1532 transitions. [2023-11-12 02:04:33,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 319 flow [2023-11-12 02:04:33,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 52 transitions, 295 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-12 02:04:33,547 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 184 flow [2023-11-12 02:04:33,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1211, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2023-11-12 02:04:33,549 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 14 predicate places. [2023-11-12 02:04:33,549 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 184 flow [2023-11-12 02:04:33,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 502.6666666666667) internal successors, (1508), 3 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:33,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:04:33,550 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:04:33,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:04:33,551 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:04:33,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:33,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1343033678, now seen corresponding path program 1 times [2023-11-12 02:04:33,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:33,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825754746] [2023-11-12 02:04:33,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:33,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:33,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:33,838 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 02:04:33,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:33,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825754746] [2023-11-12 02:04:33,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825754746] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:04:33,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:04:33,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:04:33,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931792928] [2023-11-12 02:04:33,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:04:33,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:04:33,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:33,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:04:33,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:04:33,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 497 out of 1211 [2023-11-12 02:04:33,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 505.0) internal successors, (1515), 3 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:33,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:04:33,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 497 of 1211 [2023-11-12 02:04:33,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:04:34,155 INFO L124 PetriNetUnfolderBase]: 255/438 cut-off events. [2023-11-12 02:04:34,155 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2023-11-12 02:04:34,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1070 conditions, 438 events. 255/438 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1358 event pairs, 137 based on Foata normal form. 0/384 useless extension candidates. Maximal degree in co-relation 1005. Up to 351 conditions per place. [2023-11-12 02:04:34,159 INFO L140 encePairwiseOnDemand]: 1208/1211 looper letters, 55 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2023-11-12 02:04:34,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 352 flow [2023-11-12 02:04:34,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:04:34,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:04:34,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1534 transitions. [2023-11-12 02:04:34,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42224057252958985 [2023-11-12 02:04:34,166 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1534 transitions. [2023-11-12 02:04:34,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1534 transitions. [2023-11-12 02:04:34,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:04:34,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1534 transitions. [2023-11-12 02:04:34,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 511.3333333333333) internal successors, (1534), 3 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:34,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1211.0) internal successors, (4844), 4 states have internal predecessors, (4844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:34,181 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1211.0) internal successors, (4844), 4 states have internal predecessors, (4844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:34,181 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 184 flow. Second operand 3 states and 1534 transitions. [2023-11-12 02:04:34,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 352 flow [2023-11-12 02:04:34,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 58 transitions, 345 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:04:34,186 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 195 flow [2023-11-12 02:04:34,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1211, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-11-12 02:04:34,189 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2023-11-12 02:04:34,190 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 195 flow [2023-11-12 02:04:34,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 505.0) internal successors, (1515), 3 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:34,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:04:34,192 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:04:34,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:04:34,192 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:04:34,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:34,193 INFO L85 PathProgramCache]: Analyzing trace with hash 880205792, now seen corresponding path program 1 times [2023-11-12 02:04:34,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:34,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312315205] [2023-11-12 02:04:34,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:34,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:38,935 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 02:04:38,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:38,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312315205] [2023-11-12 02:04:38,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312315205] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:04:38,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760750422] [2023-11-12 02:04:38,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:38,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:38,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:38,941 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:04:38,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2040240-d8f7-45a8-9f70-1e78918c5b1f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:04:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:39,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-12 02:04:39,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:04:41,115 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 02:04:41,116 INFO L327 TraceCheckSpWp]: Computing backward predicates...