./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-easy1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/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_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-easy1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/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_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/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 935a7b7fee114f90b65d69dd73b2635844dd9aedca06c4cbc37a4ce046611c9d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:10:47,279 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:10:47,392 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:10:47,402 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:10:47,404 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:10:47,440 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:10:47,441 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:10:47,442 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:10:47,444 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:10:47,449 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:10:47,450 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:10:47,451 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:10:47,451 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:10:47,453 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:10:47,453 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:10:47,453 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:10:47,454 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:10:47,454 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:10:47,455 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:10:47,455 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:10:47,455 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:10:47,456 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:10:47,456 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:10:47,457 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:10:47,457 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:10:47,458 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:10:47,459 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:10:47,459 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:10:47,459 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:10:47,460 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:10:47,461 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:10:47,461 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:10:47,462 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:10:47,462 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:10:47,462 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:10:47,462 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:10:47,462 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:10:47,463 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:10:47,463 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:10:47,463 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_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 935a7b7fee114f90b65d69dd73b2635844dd9aedca06c4cbc37a4ce046611c9d [2023-11-12 02:10:47,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:10:47,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:10:47,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:10:47,740 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:10:47,740 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:10:47,742 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/test-easy1.wvr.c [2023-11-12 02:10:50,982 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:10:51,200 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:10:51,201 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/sv-benchmarks/c/weaver/test-easy1.wvr.c [2023-11-12 02:10:51,211 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/data/84b820769/a5b46064a0f1400c9a6f102b47ddcab0/FLAGc31efd5d8 [2023-11-12 02:10:51,227 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/data/84b820769/a5b46064a0f1400c9a6f102b47ddcab0 [2023-11-12 02:10:51,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:10:51,236 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:10:51,242 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:10:51,243 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:10:51,249 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:10:51,252 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:10:51" (1/1) ... [2023-11-12 02:10:51,254 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33e8e752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:51, skipping insertion in model container [2023-11-12 02:10:51,254 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:10:51" (1/1) ... [2023-11-12 02:10:51,283 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:10:51,504 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_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/sv-benchmarks/c/weaver/test-easy1.wvr.c[1902,1915] [2023-11-12 02:10:51,510 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:10:51,523 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:10:51,546 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_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/sv-benchmarks/c/weaver/test-easy1.wvr.c[1902,1915] [2023-11-12 02:10:51,547 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:10:51,564 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:10:51,564 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:51 WrapperNode [2023-11-12 02:10:51,565 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:10:51,567 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:10:51,567 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:10:51,567 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:10:51,580 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:51" (1/1) ... [2023-11-12 02:10:51,589 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:51" (1/1) ... [2023-11-12 02:10:51,611 INFO L138 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2023-11-12 02:10:51,612 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:10:51,612 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:10:51,612 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:10:51,613 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:10:51,621 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:51" (1/1) ... [2023-11-12 02:10:51,621 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:51" (1/1) ... [2023-11-12 02:10:51,637 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:51" (1/1) ... [2023-11-12 02:10:51,637 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:51" (1/1) ... [2023-11-12 02:10:51,643 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:51" (1/1) ... [2023-11-12 02:10:51,647 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:51" (1/1) ... [2023-11-12 02:10:51,649 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:51" (1/1) ... [2023-11-12 02:10:51,650 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:51" (1/1) ... [2023-11-12 02:10:51,653 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:10:51,655 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:10:51,655 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:10:51,655 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:10:51,656 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:51" (1/1) ... [2023-11-12 02:10:51,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:10:51,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:51,698 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:10:51,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:10:51,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:10:51,744 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:10:51,745 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:10:51,745 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:10:51,745 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:10:51,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:10:51,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:10:51,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:10:51,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:10:51,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:10:51,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:10:51,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:10:51,748 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 02:10:51,857 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:10:51,860 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:10:52,078 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:10:52,087 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:10:52,087 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 02:10:52,090 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:10:52 BoogieIcfgContainer [2023-11-12 02:10:52,090 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:10:52,094 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:10:52,094 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:10:52,099 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:10:52,099 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:10:51" (1/3) ... [2023-11-12 02:10:52,100 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a002cf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:10:52, skipping insertion in model container [2023-11-12 02:10:52,100 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:51" (2/3) ... [2023-11-12 02:10:52,101 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a002cf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:10:52, skipping insertion in model container [2023-11-12 02:10:52,101 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:10:52" (3/3) ... [2023-11-12 02:10:52,102 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2023-11-12 02:10:52,113 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:10:52,127 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:10:52,128 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:10:52,128 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:10:52,208 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:10:52,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 182 flow [2023-11-12 02:10:52,313 INFO L124 PetriNetUnfolderBase]: 6/82 cut-off events. [2023-11-12 02:10:52,314 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:10:52,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2023-11-12 02:10:52,320 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 182 flow [2023-11-12 02:10:52,325 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2023-11-12 02:10:52,329 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:10:52,340 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 74 places, 73 transitions, 158 flow [2023-11-12 02:10:52,343 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 74 places, 73 transitions, 158 flow [2023-11-12 02:10:52,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 73 transitions, 158 flow [2023-11-12 02:10:52,388 INFO L124 PetriNetUnfolderBase]: 6/73 cut-off events. [2023-11-12 02:10:52,389 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:10:52,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 73 events. 6/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2023-11-12 02:10:52,398 INFO L119 LiptonReduction]: Number of co-enabled transitions 432 [2023-11-12 02:10:55,132 INFO L134 LiptonReduction]: Checked pairs total: 458 [2023-11-12 02:10:55,132 INFO L136 LiptonReduction]: Total number of compositions: 66 [2023-11-12 02:10:55,152 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:10:55,162 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;@676b62f9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:10:55,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-12 02:10:55,179 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:10:55,179 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-12 02:10:55,179 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:10:55,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:10:55,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:10:55,181 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 02:10:55,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:55,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1490349039, now seen corresponding path program 1 times [2023-11-12 02:10:55,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:55,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191282819] [2023-11-12 02:10:55,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:55,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:55,516 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 02:10:55,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:55,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191282819] [2023-11-12 02:10:55,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191282819] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:10:55,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:10:55,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:10:55,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105545495] [2023-11-12 02:10:55,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:10:55,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:10:55,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:55,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:10:55,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:10:55,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 150 [2023-11-12 02:10:55,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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 02:10:55,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:10:55,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 150 [2023-11-12 02:10:55,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:10:55,713 INFO L124 PetriNetUnfolderBase]: 65/114 cut-off events. [2023-11-12 02:10:55,713 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-12 02:10:55,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 114 events. 65/114 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 322 event pairs, 9 based on Foata normal form. 1/75 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-11-12 02:10:55,719 INFO L140 encePairwiseOnDemand]: 146/150 looper letters, 19 selfloop transitions, 3 changer transitions 1/25 dead transitions. [2023-11-12 02:10:55,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 117 flow [2023-11-12 02:10:55,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:10:55,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:10:55,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 231 transitions. [2023-11-12 02:10:55,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5133333333333333 [2023-11-12 02:10:55,742 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 231 transitions. [2023-11-12 02:10:55,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 231 transitions. [2023-11-12 02:10:55,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:10:55,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 231 transitions. [2023-11-12 02:10:55,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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 02:10:55,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 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 02:10:55,765 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 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 02:10:55,767 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 231 transitions. [2023-11-12 02:10:55,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 117 flow [2023-11-12 02:10:55,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 25 transitions, 103 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:10:55,774 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 53 flow [2023-11-12 02:10:55,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2023-11-12 02:10:55,781 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-11-12 02:10:55,782 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 53 flow [2023-11-12 02:10:55,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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 02:10:55,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:10:55,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:10:55,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:10:55,784 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 02:10:55,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:55,786 INFO L85 PathProgramCache]: Analyzing trace with hash -912547753, now seen corresponding path program 1 times [2023-11-12 02:10:55,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:55,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367314724] [2023-11-12 02:10:55,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:55,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:55,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:55,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:55,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367314724] [2023-11-12 02:10:55,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367314724] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:10:55,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:10:55,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:10:55,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128812790] [2023-11-12 02:10:55,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:10:55,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:10:55,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:55,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:10:55,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:10:56,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:10:56,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 53 flow. Second operand has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 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 02:10:56,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:10:56,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:10:56,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:10:56,123 INFO L124 PetriNetUnfolderBase]: 66/126 cut-off events. [2023-11-12 02:10:56,123 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-12 02:10:56,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 126 events. 66/126 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 379 event pairs, 9 based on Foata normal form. 8/132 useless extension candidates. Maximal degree in co-relation 79. Up to 52 conditions per place. [2023-11-12 02:10:56,125 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 29 selfloop transitions, 7 changer transitions 2/40 dead transitions. [2023-11-12 02:10:56,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 40 transitions, 193 flow [2023-11-12 02:10:56,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:10:56,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:10:56,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 361 transitions. [2023-11-12 02:10:56,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48133333333333334 [2023-11-12 02:10:56,130 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 361 transitions. [2023-11-12 02:10:56,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 361 transitions. [2023-11-12 02:10:56,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:10:56,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 361 transitions. [2023-11-12 02:10:56,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.2) internal successors, (361), 5 states have internal predecessors, (361), 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 02:10:56,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 150.0) internal successors, (900), 6 states have internal predecessors, (900), 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 02:10:56,137 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 150.0) internal successors, (900), 6 states have internal predecessors, (900), 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 02:10:56,138 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 53 flow. Second operand 5 states and 361 transitions. [2023-11-12 02:10:56,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 40 transitions, 193 flow [2023-11-12 02:10:56,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 40 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:10:56,140 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 106 flow [2023-11-12 02:10:56,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2023-11-12 02:10:56,142 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-11-12 02:10:56,142 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 106 flow [2023-11-12 02:10:56,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 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 02:10:56,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:10:56,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:10:56,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:10:56,144 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 02:10:56,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:56,145 INFO L85 PathProgramCache]: Analyzing trace with hash 895196253, now seen corresponding path program 2 times [2023-11-12 02:10:56,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:56,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989439140] [2023-11-12 02:10:56,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:56,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:56,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:56,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:56,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989439140] [2023-11-12 02:10:56,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989439140] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:10:56,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:10:56,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:10:56,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346179282] [2023-11-12 02:10:56,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:10:56,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:10:56,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:56,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:10:56,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:10:56,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:10:56,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 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 02:10:56,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:10:56,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:10:56,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:10:56,435 INFO L124 PetriNetUnfolderBase]: 59/116 cut-off events. [2023-11-12 02:10:56,435 INFO L125 PetriNetUnfolderBase]: For 117/117 co-relation queries the response was YES. [2023-11-12 02:10:56,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 116 events. 59/116 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 347 event pairs, 15 based on Foata normal form. 4/117 useless extension candidates. Maximal degree in co-relation 257. Up to 79 conditions per place. [2023-11-12 02:10:56,440 INFO L140 encePairwiseOnDemand]: 146/150 looper letters, 20 selfloop transitions, 6 changer transitions 6/34 dead transitions. [2023-11-12 02:10:56,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 211 flow [2023-11-12 02:10:56,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:10:56,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:10:56,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 288 transitions. [2023-11-12 02:10:56,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2023-11-12 02:10:56,447 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 288 transitions. [2023-11-12 02:10:56,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 288 transitions. [2023-11-12 02:10:56,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:10:56,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 288 transitions. [2023-11-12 02:10:56,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 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 02:10:56,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:56,456 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:56,456 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 106 flow. Second operand 4 states and 288 transitions. [2023-11-12 02:10:56,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 211 flow [2023-11-12 02:10:56,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 211 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:10:56,463 INFO L231 Difference]: Finished difference. Result has 29 places, 22 transitions, 123 flow [2023-11-12 02:10:56,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=29, PETRI_TRANSITIONS=22} [2023-11-12 02:10:56,466 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 9 predicate places. [2023-11-12 02:10:56,471 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 22 transitions, 123 flow [2023-11-12 02:10:56,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 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 02:10:56,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:10:56,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:10:56,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:10:56,475 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 02:10:56,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:56,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1778319311, now seen corresponding path program 1 times [2023-11-12 02:10:56,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:56,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176205363] [2023-11-12 02:10:56,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:56,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:56,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:56,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176205363] [2023-11-12 02:10:56,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176205363] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:10:56,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186041070] [2023-11-12 02:10:56,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:56,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:56,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:56,613 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:10:56,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:10:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:56,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:10:56,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:56,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:10:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:56,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186041070] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:10:56,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:10:56,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 6 [2023-11-12 02:10:56,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098129710] [2023-11-12 02:10:56,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:10:56,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:10:56,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:56,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:10:56,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:10:57,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:10:57,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 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 02:10:57,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:10:57,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:10:57,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:10:57,152 INFO L124 PetriNetUnfolderBase]: 54/122 cut-off events. [2023-11-12 02:10:57,153 INFO L125 PetriNetUnfolderBase]: For 173/173 co-relation queries the response was YES. [2023-11-12 02:10:57,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 122 events. 54/122 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 374 event pairs, 5 based on Foata normal form. 6/126 useless extension candidates. Maximal degree in co-relation 262. Up to 52 conditions per place. [2023-11-12 02:10:57,155 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 31 selfloop transitions, 7 changer transitions 1/41 dead transitions. [2023-11-12 02:10:57,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 279 flow [2023-11-12 02:10:57,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:10:57,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:10:57,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 293 transitions. [2023-11-12 02:10:57,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48833333333333334 [2023-11-12 02:10:57,158 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 293 transitions. [2023-11-12 02:10:57,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 293 transitions. [2023-11-12 02:10:57,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:10:57,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 293 transitions. [2023-11-12 02:10:57,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 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 02:10:57,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:57,164 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:10:57,164 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 123 flow. Second operand 4 states and 293 transitions. [2023-11-12 02:10:57,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 279 flow [2023-11-12 02:10:57,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 41 transitions, 257 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-12 02:10:57,169 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 148 flow [2023-11-12 02:10:57,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2023-11-12 02:10:57,170 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 11 predicate places. [2023-11-12 02:10:57,170 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 148 flow [2023-11-12 02:10:57,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 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 02:10:57,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:10:57,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:10:57,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 02:10:57,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:57,377 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 02:10:57,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:57,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1570643663, now seen corresponding path program 2 times [2023-11-12 02:10:57,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:57,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713031541] [2023-11-12 02:10:57,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:57,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:57,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:57,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713031541] [2023-11-12 02:10:57,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713031541] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:10:57,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:10:57,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:10:57,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645544134] [2023-11-12 02:10:57,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:10:57,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:10:57,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:57,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:10:57,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:10:57,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:10:57,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 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 02:10:57,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:10:57,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:10:57,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:10:57,559 INFO L124 PetriNetUnfolderBase]: 50/111 cut-off events. [2023-11-12 02:10:57,560 INFO L125 PetriNetUnfolderBase]: For 265/268 co-relation queries the response was YES. [2023-11-12 02:10:57,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 425 conditions, 111 events. 50/111 cut-off events. For 265/268 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 305 event pairs, 7 based on Foata normal form. 2/110 useless extension candidates. Maximal degree in co-relation 282. Up to 42 conditions per place. [2023-11-12 02:10:57,562 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 30 selfloop transitions, 6 changer transitions 2/40 dead transitions. [2023-11-12 02:10:57,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 289 flow [2023-11-12 02:10:57,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:10:57,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:10:57,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 357 transitions. [2023-11-12 02:10:57,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.476 [2023-11-12 02:10:57,565 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 357 transitions. [2023-11-12 02:10:57,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 357 transitions. [2023-11-12 02:10:57,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:10:57,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 357 transitions. [2023-11-12 02:10:57,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 71.4) internal successors, (357), 5 states have internal predecessors, (357), 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 02:10:57,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 150.0) internal successors, (900), 6 states have internal predecessors, (900), 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 02:10:57,571 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 150.0) internal successors, (900), 6 states have internal predecessors, (900), 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 02:10:57,571 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 148 flow. Second operand 5 states and 357 transitions. [2023-11-12 02:10:57,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 289 flow [2023-11-12 02:10:57,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 40 transitions, 289 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:10:57,578 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 167 flow [2023-11-12 02:10:57,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=167, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2023-11-12 02:10:57,581 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 16 predicate places. [2023-11-12 02:10:57,582 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 167 flow [2023-11-12 02:10:57,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 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 02:10:57,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:10:57,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:10:57,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:10:57,583 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 02:10:57,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:57,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1433667927, now seen corresponding path program 1 times [2023-11-12 02:10:57,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:57,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759656188] [2023-11-12 02:10:57,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:57,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:57,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:57,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:57,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759656188] [2023-11-12 02:10:57,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759656188] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:10:57,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035509693] [2023-11-12 02:10:57,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:57,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:57,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:57,808 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:10:57,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:10:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:57,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:10:57,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:57,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:57,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:10:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:58,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035509693] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:10:58,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:10:58,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 6 [2023-11-12 02:10:58,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996714462] [2023-11-12 02:10:58,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:10:58,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:10:58,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:58,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:10:58,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:10:58,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:10:58,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 25 transitions, 167 flow. Second operand has 8 states, 8 states have (on average 68.75) internal successors, (550), 8 states have internal predecessors, (550), 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 02:10:58,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:10:58,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:10:58,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:10:58,236 INFO L124 PetriNetUnfolderBase]: 108/221 cut-off events. [2023-11-12 02:10:58,237 INFO L125 PetriNetUnfolderBase]: For 484/484 co-relation queries the response was YES. [2023-11-12 02:10:58,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 931 conditions, 221 events. 108/221 cut-off events. For 484/484 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 796 event pairs, 8 based on Foata normal form. 8/228 useless extension candidates. Maximal degree in co-relation 356. Up to 91 conditions per place. [2023-11-12 02:10:58,240 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 42 selfloop transitions, 17 changer transitions 1/62 dead transitions. [2023-11-12 02:10:58,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 62 transitions, 498 flow [2023-11-12 02:10:58,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:10:58,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:10:58,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 437 transitions. [2023-11-12 02:10:58,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855555555555556 [2023-11-12 02:10:58,244 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 437 transitions. [2023-11-12 02:10:58,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 437 transitions. [2023-11-12 02:10:58,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:10:58,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 437 transitions. [2023-11-12 02:10:58,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 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 02:10:58,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 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 02:10:58,250 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 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 02:10:58,250 INFO L175 Difference]: Start difference. First operand has 36 places, 25 transitions, 167 flow. Second operand 6 states and 437 transitions. [2023-11-12 02:10:58,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 62 transitions, 498 flow [2023-11-12 02:10:58,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 62 transitions, 477 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-12 02:10:58,255 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 328 flow [2023-11-12 02:10:58,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=328, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2023-11-12 02:10:58,257 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 23 predicate places. [2023-11-12 02:10:58,257 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 328 flow [2023-11-12 02:10:58,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 68.75) internal successors, (550), 8 states have internal predecessors, (550), 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 02:10:58,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:10:58,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:10:58,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:10:58,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:58,470 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 02:10:58,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:58,471 INFO L85 PathProgramCache]: Analyzing trace with hash 553875939, now seen corresponding path program 2 times [2023-11-12 02:10:58,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:58,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656111296] [2023-11-12 02:10:58,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:58,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:58,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:58,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656111296] [2023-11-12 02:10:58,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656111296] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:10:58,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247570394] [2023-11-12 02:10:58,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:10:58,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:58,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:58,612 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:10:58,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:10:58,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:10:58,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:10:58,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:10:58,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:58,785 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:10:58,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247570394] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:10:58,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:10:58,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 9 [2023-11-12 02:10:58,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102486243] [2023-11-12 02:10:58,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:10:58,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:10:58,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:58,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:10:58,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:10:58,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:10:58,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 328 flow. Second operand has 6 states, 6 states have (on average 67.16666666666667) internal successors, (403), 6 states have internal predecessors, (403), 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 02:10:58,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:10:58,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:10:58,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:10:58,976 INFO L124 PetriNetUnfolderBase]: 156/347 cut-off events. [2023-11-12 02:10:58,976 INFO L125 PetriNetUnfolderBase]: For 1426/1448 co-relation queries the response was YES. [2023-11-12 02:10:58,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1642 conditions, 347 events. 156/347 cut-off events. For 1426/1448 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1578 event pairs, 24 based on Foata normal form. 5/350 useless extension candidates. Maximal degree in co-relation 709. Up to 117 conditions per place. [2023-11-12 02:10:58,981 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 45 selfloop transitions, 12 changer transitions 10/69 dead transitions. [2023-11-12 02:10:58,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 69 transitions, 680 flow [2023-11-12 02:10:58,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:10:58,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:10:58,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 430 transitions. [2023-11-12 02:10:58,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2023-11-12 02:10:58,985 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 430 transitions. [2023-11-12 02:10:58,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 430 transitions. [2023-11-12 02:10:58,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:10:58,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 430 transitions. [2023-11-12 02:10:58,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.66666666666667) internal successors, (430), 6 states have internal predecessors, (430), 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 02:10:58,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 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 02:10:58,991 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 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 02:10:58,991 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 328 flow. Second operand 6 states and 430 transitions. [2023-11-12 02:10:58,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 69 transitions, 680 flow [2023-11-12 02:10:58,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 69 transitions, 616 flow, removed 23 selfloop flow, removed 2 redundant places. [2023-11-12 02:10:59,000 INFO L231 Difference]: Finished difference. Result has 50 places, 39 transitions, 367 flow [2023-11-12 02:10:59,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=367, PETRI_PLACES=50, PETRI_TRANSITIONS=39} [2023-11-12 02:10:59,002 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2023-11-12 02:10:59,002 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 39 transitions, 367 flow [2023-11-12 02:10:59,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 67.16666666666667) internal successors, (403), 6 states have internal predecessors, (403), 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 02:10:59,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:10:59,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:10:59,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:10:59,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:10:59,210 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 02:10:59,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:59,211 INFO L85 PathProgramCache]: Analyzing trace with hash 481599129, now seen corresponding path program 3 times [2023-11-12 02:10:59,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:59,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905871380] [2023-11-12 02:10:59,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:59,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:59,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:59,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:59,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905871380] [2023-11-12 02:10:59,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905871380] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:10:59,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709608661] [2023-11-12 02:10:59,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:10:59,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:59,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:59,338 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:10:59,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:10:59,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 02:10:59,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:10:59,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:10:59,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:59,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:10:59,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:10:59,583 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 02:10:59,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709608661] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:10:59,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:10:59,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 2] total 8 [2023-11-12 02:10:59,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448658751] [2023-11-12 02:10:59,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:10:59,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:10:59,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:59,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:10:59,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:10:59,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:10:59,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 39 transitions, 367 flow. Second operand has 10 states, 10 states have (on average 68.4) internal successors, (684), 10 states have internal predecessors, (684), 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 02:10:59,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:10:59,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:10:59,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:10:59,875 INFO L124 PetriNetUnfolderBase]: 187/404 cut-off events. [2023-11-12 02:10:59,875 INFO L125 PetriNetUnfolderBase]: For 2062/2062 co-relation queries the response was YES. [2023-11-12 02:10:59,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2027 conditions, 404 events. 187/404 cut-off events. For 2062/2062 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1927 event pairs, 30 based on Foata normal form. 6/409 useless extension candidates. Maximal degree in co-relation 1971. Up to 287 conditions per place. [2023-11-12 02:10:59,882 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 54 selfloop transitions, 16 changer transitions 3/75 dead transitions. [2023-11-12 02:10:59,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 75 transitions, 781 flow [2023-11-12 02:10:59,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:10:59,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:10:59,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 505 transitions. [2023-11-12 02:10:59,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48095238095238096 [2023-11-12 02:10:59,886 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 505 transitions. [2023-11-12 02:10:59,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 505 transitions. [2023-11-12 02:10:59,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:10:59,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 505 transitions. [2023-11-12 02:10:59,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 72.14285714285714) internal successors, (505), 7 states have internal predecessors, (505), 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 02:10:59,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 150.0) internal successors, (1200), 8 states have internal predecessors, (1200), 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 02:10:59,893 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 150.0) internal successors, (1200), 8 states have internal predecessors, (1200), 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 02:10:59,893 INFO L175 Difference]: Start difference. First operand has 50 places, 39 transitions, 367 flow. Second operand 7 states and 505 transitions. [2023-11-12 02:10:59,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 75 transitions, 781 flow [2023-11-12 02:10:59,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 760 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-12 02:10:59,905 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 570 flow [2023-11-12 02:10:59,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=570, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2023-11-12 02:10:59,908 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 37 predicate places. [2023-11-12 02:10:59,908 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 570 flow [2023-11-12 02:10:59,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 68.4) internal successors, (684), 10 states have internal predecessors, (684), 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 02:10:59,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:10:59,910 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:10:59,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:00,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 02:11:00,117 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 02:11:00,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:00,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1425875505, now seen corresponding path program 4 times [2023-11-12 02:11:00,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:00,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147457004] [2023-11-12 02:11:00,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:00,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:00,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:00,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:00,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147457004] [2023-11-12 02:11:00,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147457004] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:00,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679040890] [2023-11-12 02:11:00,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:11:00,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:00,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:00,235 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:00,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:11:00,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:11:00,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:11:00,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:11:00,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:00,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:00,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679040890] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:00,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:00,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-12 02:11:00,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969650980] [2023-11-12 02:11:00,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:00,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:11:00,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:00,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:11:00,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:11:00,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:11:00,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 570 flow. Second operand has 11 states, 11 states have (on average 67.72727272727273) internal successors, (745), 11 states have internal predecessors, (745), 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 02:11:00,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:11:00,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:11:00,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:11:00,857 INFO L124 PetriNetUnfolderBase]: 246/525 cut-off events. [2023-11-12 02:11:00,858 INFO L125 PetriNetUnfolderBase]: For 3464/3464 co-relation queries the response was YES. [2023-11-12 02:11:00,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2831 conditions, 525 events. 246/525 cut-off events. For 3464/3464 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2686 event pairs, 8 based on Foata normal form. 28/552 useless extension candidates. Maximal degree in co-relation 1756. Up to 204 conditions per place. [2023-11-12 02:11:00,866 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 71 selfloop transitions, 38 changer transitions 2/113 dead transitions. [2023-11-12 02:11:00,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 113 transitions, 1254 flow [2023-11-12 02:11:00,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:11:00,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-12 02:11:00,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 858 transitions. [2023-11-12 02:11:00,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2023-11-12 02:11:00,871 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 858 transitions. [2023-11-12 02:11:00,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 858 transitions. [2023-11-12 02:11:00,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:11:00,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 858 transitions. [2023-11-12 02:11:00,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 71.5) internal successors, (858), 12 states have internal predecessors, (858), 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 02:11:00,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 150.0) internal successors, (1950), 13 states have internal predecessors, (1950), 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 02:11:00,880 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 150.0) internal successors, (1950), 13 states have internal predecessors, (1950), 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 02:11:00,880 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 570 flow. Second operand 12 states and 858 transitions. [2023-11-12 02:11:00,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 113 transitions, 1254 flow [2023-11-12 02:11:00,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 113 transitions, 1193 flow, removed 29 selfloop flow, removed 1 redundant places. [2023-11-12 02:11:00,896 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 926 flow [2023-11-12 02:11:00,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=926, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2023-11-12 02:11:00,897 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 52 predicate places. [2023-11-12 02:11:00,897 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 926 flow [2023-11-12 02:11:00,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 67.72727272727273) internal successors, (745), 11 states have internal predecessors, (745), 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 02:11:00,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:11:00,898 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:00,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:01,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-12 02:11:01,105 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:11:01,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:01,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1352997121, now seen corresponding path program 5 times [2023-11-12 02:11:01,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:01,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715230831] [2023-11-12 02:11:01,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:01,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:01,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:01,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:01,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:01,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715230831] [2023-11-12 02:11:01,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715230831] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:01,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816037616] [2023-11-12 02:11:01,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:11:01,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:01,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:01,178 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:01,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:11:01,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:11:01,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:11:01,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:11:01,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:01,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:01,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:01,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:01,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816037616] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:01,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:01,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-12 02:11:01,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813458472] [2023-11-12 02:11:01,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:01,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:11:01,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:01,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:11:01,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:11:01,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:11:01,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 926 flow. Second operand has 10 states, 10 states have (on average 67.8) internal successors, (678), 10 states have internal predecessors, (678), 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 02:11:01,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:11:01,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:11:01,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:11:01,737 INFO L124 PetriNetUnfolderBase]: 252/573 cut-off events. [2023-11-12 02:11:01,737 INFO L125 PetriNetUnfolderBase]: For 6389/6389 co-relation queries the response was YES. [2023-11-12 02:11:01,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3625 conditions, 573 events. 252/573 cut-off events. For 6389/6389 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3163 event pairs, 18 based on Foata normal form. 32/604 useless extension candidates. Maximal degree in co-relation 2894. Up to 196 conditions per place. [2023-11-12 02:11:01,745 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 74 selfloop transitions, 35 changer transitions 13/124 dead transitions. [2023-11-12 02:11:01,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 124 transitions, 1735 flow [2023-11-12 02:11:01,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:11:01,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:11:01,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 641 transitions. [2023-11-12 02:11:01,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748148148148148 [2023-11-12 02:11:01,749 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 641 transitions. [2023-11-12 02:11:01,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 641 transitions. [2023-11-12 02:11:01,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:11:01,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 641 transitions. [2023-11-12 02:11:01,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 71.22222222222223) internal successors, (641), 9 states have internal predecessors, (641), 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 02:11:01,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 150.0) internal successors, (1500), 10 states have internal predecessors, (1500), 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 02:11:01,756 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 150.0) internal successors, (1500), 10 states have internal predecessors, (1500), 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 02:11:01,756 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 926 flow. Second operand 9 states and 641 transitions. [2023-11-12 02:11:01,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 124 transitions, 1735 flow [2023-11-12 02:11:01,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 124 transitions, 1503 flow, removed 112 selfloop flow, removed 2 redundant places. [2023-11-12 02:11:01,791 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 1126 flow [2023-11-12 02:11:01,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1126, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2023-11-12 02:11:01,793 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 63 predicate places. [2023-11-12 02:11:01,793 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 1126 flow [2023-11-12 02:11:01,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 67.8) internal successors, (678), 10 states have internal predecessors, (678), 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 02:11:01,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:11:01,794 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:01,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:02,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:11:02,000 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:11:02,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:02,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1311051543, now seen corresponding path program 6 times [2023-11-12 02:11:02,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:02,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22497297] [2023-11-12 02:11:02,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:02,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:02,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:02,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:02,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22497297] [2023-11-12 02:11:02,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22497297] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:02,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540487142] [2023-11-12 02:11:02,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:11:02,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:02,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:02,070 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:02,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:11:02,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-12 02:11:02,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:11:02,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:11:02,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:02,229 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:11:02,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540487142] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:02,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:11:02,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 9 [2023-11-12 02:11:02,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904162737] [2023-11-12 02:11:02,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:02,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:11:02,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:02,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:11:02,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:11:02,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:11:02,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 1126 flow. Second operand has 6 states, 6 states have (on average 67.33333333333333) internal successors, (404), 6 states have internal predecessors, (404), 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 02:11:02,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:11:02,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:11:02,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:11:02,435 INFO L124 PetriNetUnfolderBase]: 219/478 cut-off events. [2023-11-12 02:11:02,436 INFO L125 PetriNetUnfolderBase]: For 6345/6348 co-relation queries the response was YES. [2023-11-12 02:11:02,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3031 conditions, 478 events. 219/478 cut-off events. For 6345/6348 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2400 event pairs, 21 based on Foata normal form. 3/479 useless extension candidates. Maximal degree in co-relation 2614. Up to 253 conditions per place. [2023-11-12 02:11:02,442 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 67 selfloop transitions, 12 changer transitions 18/99 dead transitions. [2023-11-12 02:11:02,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 99 transitions, 1459 flow [2023-11-12 02:11:02,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:11:02,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:11:02,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 422 transitions. [2023-11-12 02:11:02,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4688888888888889 [2023-11-12 02:11:02,446 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 422 transitions. [2023-11-12 02:11:02,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 422 transitions. [2023-11-12 02:11:02,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:11:02,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 422 transitions. [2023-11-12 02:11:02,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 70.33333333333333) internal successors, (422), 6 states have internal predecessors, (422), 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 02:11:02,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 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 02:11:02,451 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 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 02:11:02,451 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 1126 flow. Second operand 6 states and 422 transitions. [2023-11-12 02:11:02,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 99 transitions, 1459 flow [2023-11-12 02:11:02,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 99 transitions, 1330 flow, removed 63 selfloop flow, removed 1 redundant places. [2023-11-12 02:11:02,477 INFO L231 Difference]: Finished difference. Result has 89 places, 73 transitions, 900 flow [2023-11-12 02:11:02,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=900, PETRI_PLACES=89, PETRI_TRANSITIONS=73} [2023-11-12 02:11:02,478 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 69 predicate places. [2023-11-12 02:11:02,479 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 73 transitions, 900 flow [2023-11-12 02:11:02,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 67.33333333333333) internal successors, (404), 6 states have internal predecessors, (404), 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 02:11:02,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:11:02,479 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:02,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:02,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 02:11:02,686 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:11:02,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:02,686 INFO L85 PathProgramCache]: Analyzing trace with hash -2058064667, now seen corresponding path program 7 times [2023-11-12 02:11:02,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:02,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389287600] [2023-11-12 02:11:02,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:02,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:02,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:02,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:02,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389287600] [2023-11-12 02:11:02,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389287600] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:02,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601250614] [2023-11-12 02:11:02,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:11:02,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:02,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:02,754 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:02,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:11:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:02,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:11:02,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:02,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:02,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:02,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601250614] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:02,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:02,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-11-12 02:11:02,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154451198] [2023-11-12 02:11:02,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:02,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:11:02,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:02,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:11:02,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:11:03,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:11:03,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 73 transitions, 900 flow. Second operand has 11 states, 11 states have (on average 67.72727272727273) internal successors, (745), 11 states have internal predecessors, (745), 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 02:11:03,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:11:03,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:11:03,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:11:03,335 INFO L124 PetriNetUnfolderBase]: 197/413 cut-off events. [2023-11-12 02:11:03,336 INFO L125 PetriNetUnfolderBase]: For 5888/5888 co-relation queries the response was YES. [2023-11-12 02:11:03,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2534 conditions, 413 events. 197/413 cut-off events. For 5888/5888 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1874 event pairs, 14 based on Foata normal form. 6/418 useless extension candidates. Maximal degree in co-relation 2456. Up to 182 conditions per place. [2023-11-12 02:11:03,343 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 63 selfloop transitions, 36 changer transitions 1/102 dead transitions. [2023-11-12 02:11:03,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 102 transitions, 1246 flow [2023-11-12 02:11:03,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:11:03,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:11:03,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 637 transitions. [2023-11-12 02:11:03,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47185185185185186 [2023-11-12 02:11:03,347 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 637 transitions. [2023-11-12 02:11:03,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 637 transitions. [2023-11-12 02:11:03,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:11:03,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 637 transitions. [2023-11-12 02:11:03,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 70.77777777777777) internal successors, (637), 9 states have internal predecessors, (637), 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 02:11:03,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 150.0) internal successors, (1500), 10 states have internal predecessors, (1500), 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 02:11:03,356 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 150.0) internal successors, (1500), 10 states have internal predecessors, (1500), 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 02:11:03,356 INFO L175 Difference]: Start difference. First operand has 89 places, 73 transitions, 900 flow. Second operand 9 states and 637 transitions. [2023-11-12 02:11:03,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 102 transitions, 1246 flow [2023-11-12 02:11:03,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 102 transitions, 1147 flow, removed 40 selfloop flow, removed 7 redundant places. [2023-11-12 02:11:03,383 INFO L231 Difference]: Finished difference. Result has 89 places, 76 transitions, 947 flow [2023-11-12 02:11:03,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=798, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=947, PETRI_PLACES=89, PETRI_TRANSITIONS=76} [2023-11-12 02:11:03,384 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 69 predicate places. [2023-11-12 02:11:03,384 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 76 transitions, 947 flow [2023-11-12 02:11:03,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 67.72727272727273) internal successors, (745), 11 states have internal predecessors, (745), 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 02:11:03,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:11:03,385 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:03,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:03,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:03,598 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:11:03,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:03,598 INFO L85 PathProgramCache]: Analyzing trace with hash -807794697, now seen corresponding path program 8 times [2023-11-12 02:11:03,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:03,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682533235] [2023-11-12 02:11:03,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:03,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:03,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:03,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:03,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682533235] [2023-11-12 02:11:03,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682533235] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:03,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974968456] [2023-11-12 02:11:03,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:11:03,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:03,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:03,719 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:03,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:11:03,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:11:03,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:11:03,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:11:03,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:03,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:03,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:03,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:03,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974968456] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:03,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:03,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-11-12 02:11:03,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845505080] [2023-11-12 02:11:03,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:03,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:11:03,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:03,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:11:03,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:11:04,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:11:04,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 76 transitions, 947 flow. Second operand has 11 states, 11 states have (on average 67.72727272727273) internal successors, (745), 11 states have internal predecessors, (745), 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 02:11:04,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:11:04,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:11:04,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:11:04,208 INFO L124 PetriNetUnfolderBase]: 190/394 cut-off events. [2023-11-12 02:11:04,209 INFO L125 PetriNetUnfolderBase]: For 4407/4407 co-relation queries the response was YES. [2023-11-12 02:11:04,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2413 conditions, 394 events. 190/394 cut-off events. For 4407/4407 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1717 event pairs, 16 based on Foata normal form. 4/397 useless extension candidates. Maximal degree in co-relation 2152. Up to 239 conditions per place. [2023-11-12 02:11:04,214 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 65 selfloop transitions, 18 changer transitions 7/92 dead transitions. [2023-11-12 02:11:04,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 92 transitions, 1195 flow [2023-11-12 02:11:04,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:11:04,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-12 02:11:04,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 558 transitions. [2023-11-12 02:11:04,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465 [2023-11-12 02:11:04,217 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 558 transitions. [2023-11-12 02:11:04,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 558 transitions. [2023-11-12 02:11:04,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:11:04,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 558 transitions. [2023-11-12 02:11:04,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 69.75) internal successors, (558), 8 states have internal predecessors, (558), 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 02:11:04,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 150.0) internal successors, (1350), 9 states have internal predecessors, (1350), 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 02:11:04,223 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 150.0) internal successors, (1350), 9 states have internal predecessors, (1350), 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 02:11:04,223 INFO L175 Difference]: Start difference. First operand has 89 places, 76 transitions, 947 flow. Second operand 8 states and 558 transitions. [2023-11-12 02:11:04,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 92 transitions, 1195 flow [2023-11-12 02:11:04,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 92 transitions, 1113 flow, removed 14 selfloop flow, removed 5 redundant places. [2023-11-12 02:11:04,241 INFO L231 Difference]: Finished difference. Result has 92 places, 74 transitions, 889 flow [2023-11-12 02:11:04,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=857, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=889, PETRI_PLACES=92, PETRI_TRANSITIONS=74} [2023-11-12 02:11:04,243 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2023-11-12 02:11:04,243 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 74 transitions, 889 flow [2023-11-12 02:11:04,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 67.72727272727273) internal successors, (745), 11 states have internal predecessors, (745), 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 02:11:04,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:11:04,244 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:04,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:04,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-12 02:11:04,455 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:11:04,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:04,455 INFO L85 PathProgramCache]: Analyzing trace with hash -944771367, now seen corresponding path program 9 times [2023-11-12 02:11:04,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:04,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115409926] [2023-11-12 02:11:04,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:04,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:04,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:04,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:04,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115409926] [2023-11-12 02:11:04,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115409926] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:04,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698870117] [2023-11-12 02:11:04,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:11:04,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:04,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:04,544 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:04,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:11:04,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 02:11:04,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:11:04,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:11:04,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:04,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:04,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698870117] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:04,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:04,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-11-12 02:11:04,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391362986] [2023-11-12 02:11:04,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:04,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:11:04,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:04,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:11:04,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:11:04,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:11:04,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 74 transitions, 889 flow. Second operand has 11 states, 11 states have (on average 67.72727272727273) internal successors, (745), 11 states have internal predecessors, (745), 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 02:11:04,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:11:04,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:11:04,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:11:05,181 INFO L124 PetriNetUnfolderBase]: 243/516 cut-off events. [2023-11-12 02:11:05,181 INFO L125 PetriNetUnfolderBase]: For 6306/6306 co-relation queries the response was YES. [2023-11-12 02:11:05,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3287 conditions, 516 events. 243/516 cut-off events. For 6306/6306 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2519 event pairs, 12 based on Foata normal form. 6/521 useless extension candidates. Maximal degree in co-relation 2902. Up to 137 conditions per place. [2023-11-12 02:11:05,188 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 79 selfloop transitions, 56 changer transitions 0/137 dead transitions. [2023-11-12 02:11:05,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 137 transitions, 1731 flow [2023-11-12 02:11:05,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:11:05,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-12 02:11:05,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 785 transitions. [2023-11-12 02:11:05,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47575757575757577 [2023-11-12 02:11:05,193 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 785 transitions. [2023-11-12 02:11:05,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 785 transitions. [2023-11-12 02:11:05,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:11:05,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 785 transitions. [2023-11-12 02:11:05,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 71.36363636363636) internal successors, (785), 11 states have internal predecessors, (785), 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 02:11:05,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 150.0) internal successors, (1800), 12 states have internal predecessors, (1800), 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 02:11:05,201 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 150.0) internal successors, (1800), 12 states have internal predecessors, (1800), 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 02:11:05,201 INFO L175 Difference]: Start difference. First operand has 92 places, 74 transitions, 889 flow. Second operand 11 states and 785 transitions. [2023-11-12 02:11:05,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 137 transitions, 1731 flow [2023-11-12 02:11:05,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 137 transitions, 1673 flow, removed 19 selfloop flow, removed 4 redundant places. [2023-11-12 02:11:05,224 INFO L231 Difference]: Finished difference. Result has 102 places, 92 transitions, 1373 flow [2023-11-12 02:11:05,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1373, PETRI_PLACES=102, PETRI_TRANSITIONS=92} [2023-11-12 02:11:05,225 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 82 predicate places. [2023-11-12 02:11:05,225 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 92 transitions, 1373 flow [2023-11-12 02:11:05,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 67.72727272727273) internal successors, (745), 11 states have internal predecessors, (745), 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 02:11:05,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:11:05,226 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:05,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:05,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 02:11:05,432 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:11:05,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:05,433 INFO L85 PathProgramCache]: Analyzing trace with hash -2031037817, now seen corresponding path program 10 times [2023-11-12 02:11:05,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:05,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182813507] [2023-11-12 02:11:05,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:05,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:05,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:05,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:05,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182813507] [2023-11-12 02:11:05,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182813507] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:05,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119888677] [2023-11-12 02:11:05,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:11:05,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:05,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:05,561 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:05,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:11:05,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:11:05,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:11:05,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:11:05,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:05,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:05,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119888677] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:05,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:05,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 3] total 13 [2023-11-12 02:11:05,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274061269] [2023-11-12 02:11:05,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:05,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:11:05,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:05,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:11:05,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:11:05,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:11:05,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 92 transitions, 1373 flow. Second operand has 15 states, 15 states have (on average 67.86666666666666) internal successors, (1018), 15 states have internal predecessors, (1018), 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 02:11:05,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:11:05,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:11:05,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:11:06,387 INFO L124 PetriNetUnfolderBase]: 442/868 cut-off events. [2023-11-12 02:11:06,388 INFO L125 PetriNetUnfolderBase]: For 17970/17970 co-relation queries the response was YES. [2023-11-12 02:11:06,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6516 conditions, 868 events. 442/868 cut-off events. For 17970/17970 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4622 event pairs, 40 based on Foata normal form. 59/926 useless extension candidates. Maximal degree in co-relation 6039. Up to 370 conditions per place. [2023-11-12 02:11:06,401 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 98 selfloop transitions, 64 changer transitions 11/175 dead transitions. [2023-11-12 02:11:06,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 175 transitions, 2836 flow [2023-11-12 02:11:06,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:11:06,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-12 02:11:06,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 719 transitions. [2023-11-12 02:11:06,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47933333333333333 [2023-11-12 02:11:06,407 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 719 transitions. [2023-11-12 02:11:06,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 719 transitions. [2023-11-12 02:11:06,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:11:06,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 719 transitions. [2023-11-12 02:11:06,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 71.9) internal successors, (719), 10 states have internal predecessors, (719), 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 02:11:06,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 150.0) internal successors, (1650), 11 states have internal predecessors, (1650), 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 02:11:06,416 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 150.0) internal successors, (1650), 11 states have internal predecessors, (1650), 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 02:11:06,416 INFO L175 Difference]: Start difference. First operand has 102 places, 92 transitions, 1373 flow. Second operand 10 states and 719 transitions. [2023-11-12 02:11:06,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 175 transitions, 2836 flow [2023-11-12 02:11:06,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 175 transitions, 2619 flow, removed 102 selfloop flow, removed 3 redundant places. [2023-11-12 02:11:06,508 INFO L231 Difference]: Finished difference. Result has 113 places, 127 transitions, 2072 flow [2023-11-12 02:11:06,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2072, PETRI_PLACES=113, PETRI_TRANSITIONS=127} [2023-11-12 02:11:06,510 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 93 predicate places. [2023-11-12 02:11:06,510 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 127 transitions, 2072 flow [2023-11-12 02:11:06,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 67.86666666666666) internal successors, (1018), 15 states have internal predecessors, (1018), 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 02:11:06,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:11:06,511 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:06,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:06,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-12 02:11:06,718 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:11:06,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:06,718 INFO L85 PathProgramCache]: Analyzing trace with hash 8132577, now seen corresponding path program 11 times [2023-11-12 02:11:06,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:06,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23744749] [2023-11-12 02:11:06,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:06,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:06,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:06,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:11:06,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:06,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23744749] [2023-11-12 02:11:06,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23744749] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:06,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066785106] [2023-11-12 02:11:06,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:11:06,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:06,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:06,850 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:06,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:11:06,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-12 02:11:06,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:11:06,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:11:06,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:07,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:11:07,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066785106] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:07,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:07,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 3] total 9 [2023-11-12 02:11:07,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374842788] [2023-11-12 02:11:07,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:07,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:11:07,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:07,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:11:07,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:11:07,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:11:07,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 127 transitions, 2072 flow. Second operand has 11 states, 11 states have (on average 67.9090909090909) internal successors, (747), 11 states have internal predecessors, (747), 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 02:11:07,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:11:07,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:11:07,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:11:07,678 INFO L124 PetriNetUnfolderBase]: 554/1125 cut-off events. [2023-11-12 02:11:07,678 INFO L125 PetriNetUnfolderBase]: For 23691/23691 co-relation queries the response was YES. [2023-11-12 02:11:07,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8979 conditions, 1125 events. 554/1125 cut-off events. For 23691/23691 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 6680 event pairs, 96 based on Foata normal form. 11/1135 useless extension candidates. Maximal degree in co-relation 8709. Up to 783 conditions per place. [2023-11-12 02:11:07,698 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 146 selfloop transitions, 61 changer transitions 10/219 dead transitions. [2023-11-12 02:11:07,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 219 transitions, 3925 flow [2023-11-12 02:11:07,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:11:07,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-12 02:11:07,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 793 transitions. [2023-11-12 02:11:07,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806060606060606 [2023-11-12 02:11:07,704 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 793 transitions. [2023-11-12 02:11:07,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 793 transitions. [2023-11-12 02:11:07,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:11:07,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 793 transitions. [2023-11-12 02:11:07,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 72.0909090909091) internal successors, (793), 11 states have internal predecessors, (793), 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 02:11:07,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 150.0) internal successors, (1800), 12 states have internal predecessors, (1800), 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 02:11:07,717 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 150.0) internal successors, (1800), 12 states have internal predecessors, (1800), 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 02:11:07,717 INFO L175 Difference]: Start difference. First operand has 113 places, 127 transitions, 2072 flow. Second operand 11 states and 793 transitions. [2023-11-12 02:11:07,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 219 transitions, 3925 flow [2023-11-12 02:11:07,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 219 transitions, 3644 flow, removed 127 selfloop flow, removed 4 redundant places. [2023-11-12 02:11:07,884 INFO L231 Difference]: Finished difference. Result has 127 places, 173 transitions, 2954 flow [2023-11-12 02:11:07,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=1813, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2954, PETRI_PLACES=127, PETRI_TRANSITIONS=173} [2023-11-12 02:11:07,885 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 107 predicate places. [2023-11-12 02:11:07,885 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 173 transitions, 2954 flow [2023-11-12 02:11:07,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 67.9090909090909) internal successors, (747), 11 states have internal predecessors, (747), 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 02:11:07,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:11:07,886 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:07,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:08,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-12 02:11:08,093 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:11:08,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:08,093 INFO L85 PathProgramCache]: Analyzing trace with hash 370567103, now seen corresponding path program 12 times [2023-11-12 02:11:08,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:08,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268784943] [2023-11-12 02:11:08,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:08,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:08,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:08,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:08,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268784943] [2023-11-12 02:11:08,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268784943] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:08,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016215888] [2023-11-12 02:11:08,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:11:08,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:08,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:08,272 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:08,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:11:08,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-12 02:11:08,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:11:08,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:11:08,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:08,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:08,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:11:08,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016215888] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:08,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:08,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 3] total 13 [2023-11-12 02:11:08,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032518295] [2023-11-12 02:11:08,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:08,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:11:08,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:08,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:11:08,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:11:08,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:11:08,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 173 transitions, 2954 flow. Second operand has 15 states, 15 states have (on average 67.66666666666667) internal successors, (1015), 15 states have internal predecessors, (1015), 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 02:11:08,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:11:08,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:11:08,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:11:09,245 INFO L124 PetriNetUnfolderBase]: 602/1230 cut-off events. [2023-11-12 02:11:09,246 INFO L125 PetriNetUnfolderBase]: For 32129/32129 co-relation queries the response was YES. [2023-11-12 02:11:09,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10118 conditions, 1230 events. 602/1230 cut-off events. For 32129/32129 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 7471 event pairs, 119 based on Foata normal form. 9/1238 useless extension candidates. Maximal degree in co-relation 9031. Up to 1053 conditions per place. [2023-11-12 02:11:09,266 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 185 selfloop transitions, 36 changer transitions 5/228 dead transitions. [2023-11-12 02:11:09,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 228 transitions, 4269 flow [2023-11-12 02:11:09,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:11:09,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-12 02:11:09,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 717 transitions. [2023-11-12 02:11:09,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478 [2023-11-12 02:11:09,268 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 717 transitions. [2023-11-12 02:11:09,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 717 transitions. [2023-11-12 02:11:09,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:11:09,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 717 transitions. [2023-11-12 02:11:09,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 71.7) internal successors, (717), 10 states have internal predecessors, (717), 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 02:11:09,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 150.0) internal successors, (1650), 11 states have internal predecessors, (1650), 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 02:11:09,276 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 150.0) internal successors, (1650), 11 states have internal predecessors, (1650), 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 02:11:09,276 INFO L175 Difference]: Start difference. First operand has 127 places, 173 transitions, 2954 flow. Second operand 10 states and 717 transitions. [2023-11-12 02:11:09,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 228 transitions, 4269 flow [2023-11-12 02:11:09,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 228 transitions, 3868 flow, removed 199 selfloop flow, removed 1 redundant places. [2023-11-12 02:11:09,403 INFO L231 Difference]: Finished difference. Result has 141 places, 195 transitions, 3155 flow [2023-11-12 02:11:09,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=2565, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3155, PETRI_PLACES=141, PETRI_TRANSITIONS=195} [2023-11-12 02:11:09,404 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 121 predicate places. [2023-11-12 02:11:09,405 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 195 transitions, 3155 flow [2023-11-12 02:11:09,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 67.66666666666667) internal successors, (1015), 15 states have internal predecessors, (1015), 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 02:11:09,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:11:09,405 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:09,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:09,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-12 02:11:09,624 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:11:09,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:09,625 INFO L85 PathProgramCache]: Analyzing trace with hash 418690789, now seen corresponding path program 13 times [2023-11-12 02:11:09,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:09,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487660421] [2023-11-12 02:11:09,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:09,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:09,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:09,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487660421] [2023-11-12 02:11:09,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487660421] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:09,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869857970] [2023-11-12 02:11:09,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:11:09,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:09,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:09,726 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:09,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-12 02:11:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:09,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:11:09,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:09,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:09,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:09,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869857970] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:09,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:09,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-12 02:11:09,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570592983] [2023-11-12 02:11:09,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:09,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 02:11:09,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:09,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 02:11:09,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:11:10,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:11:10,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 195 transitions, 3155 flow. Second operand has 14 states, 14 states have (on average 67.28571428571429) internal successors, (942), 14 states have internal predecessors, (942), 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 02:11:10,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:11:10,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:11:10,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:11:10,716 INFO L124 PetriNetUnfolderBase]: 604/1307 cut-off events. [2023-11-12 02:11:10,716 INFO L125 PetriNetUnfolderBase]: For 40226/40226 co-relation queries the response was YES. [2023-11-12 02:11:10,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10871 conditions, 1307 events. 604/1307 cut-off events. For 40226/40226 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 8462 event pairs, 40 based on Foata normal form. 60/1366 useless extension candidates. Maximal degree in co-relation 9520. Up to 355 conditions per place. [2023-11-12 02:11:10,748 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 115 selfloop transitions, 121 changer transitions 21/259 dead transitions. [2023-11-12 02:11:10,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 259 transitions, 4600 flow [2023-11-12 02:11:10,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:11:10,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-12 02:11:10,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 851 transitions. [2023-11-12 02:11:10,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727777777777778 [2023-11-12 02:11:10,753 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 851 transitions. [2023-11-12 02:11:10,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 851 transitions. [2023-11-12 02:11:10,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:11:10,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 851 transitions. [2023-11-12 02:11:10,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 70.91666666666667) internal successors, (851), 12 states have internal predecessors, (851), 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 02:11:10,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 150.0) internal successors, (1950), 13 states have internal predecessors, (1950), 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 02:11:10,766 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 150.0) internal successors, (1950), 13 states have internal predecessors, (1950), 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 02:11:10,766 INFO L175 Difference]: Start difference. First operand has 141 places, 195 transitions, 3155 flow. Second operand 12 states and 851 transitions. [2023-11-12 02:11:10,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 259 transitions, 4600 flow [2023-11-12 02:11:10,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 259 transitions, 4408 flow, removed 90 selfloop flow, removed 2 redundant places. [2023-11-12 02:11:10,920 INFO L231 Difference]: Finished difference. Result has 155 places, 201 transitions, 3841 flow [2023-11-12 02:11:10,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=2919, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3841, PETRI_PLACES=155, PETRI_TRANSITIONS=201} [2023-11-12 02:11:10,921 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 135 predicate places. [2023-11-12 02:11:10,922 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 201 transitions, 3841 flow [2023-11-12 02:11:10,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 67.28571428571429) internal successors, (942), 14 states have internal predecessors, (942), 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 02:11:10,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:11:10,923 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:10,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:11,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-12 02:11:11,134 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:11:11,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:11,134 INFO L85 PathProgramCache]: Analyzing trace with hash 837192397, now seen corresponding path program 14 times [2023-11-12 02:11:11,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:11,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393141022] [2023-11-12 02:11:11,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:11,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:11,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:11,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393141022] [2023-11-12 02:11:11,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393141022] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:11,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404248708] [2023-11-12 02:11:11,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:11:11,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:11,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:11,210 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:11,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-12 02:11:11,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:11:11,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:11:11,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:11:11,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:11,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:11,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:11,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:11,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404248708] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:11,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:11,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-11-12 02:11:11,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218566667] [2023-11-12 02:11:11,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:11,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 02:11:11,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:11,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 02:11:11,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:11:11,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:11:11,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 201 transitions, 3841 flow. Second operand has 16 states, 16 states have (on average 67.25) internal successors, (1076), 16 states have internal predecessors, (1076), 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 02:11:11,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:11:11,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:11:11,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:11:12,298 INFO L124 PetriNetUnfolderBase]: 530/1113 cut-off events. [2023-11-12 02:11:12,298 INFO L125 PetriNetUnfolderBase]: For 33542/33542 co-relation queries the response was YES. [2023-11-12 02:11:12,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9764 conditions, 1113 events. 530/1113 cut-off events. For 33542/33542 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6686 event pairs, 42 based on Foata normal form. 6/1118 useless extension candidates. Maximal degree in co-relation 8598. Up to 355 conditions per place. [2023-11-12 02:11:12,315 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 108 selfloop transitions, 134 changer transitions 4/248 dead transitions. [2023-11-12 02:11:12,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 248 transitions, 4708 flow [2023-11-12 02:11:12,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 02:11:12,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-12 02:11:12,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1052 transitions. [2023-11-12 02:11:12,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46755555555555556 [2023-11-12 02:11:12,319 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1052 transitions. [2023-11-12 02:11:12,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1052 transitions. [2023-11-12 02:11:12,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:11:12,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1052 transitions. [2023-11-12 02:11:12,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 70.13333333333334) internal successors, (1052), 15 states have internal predecessors, (1052), 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 02:11:12,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 150.0) internal successors, (2400), 16 states have internal predecessors, (2400), 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 02:11:12,337 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 150.0) internal successors, (2400), 16 states have internal predecessors, (2400), 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 02:11:12,345 INFO L175 Difference]: Start difference. First operand has 155 places, 201 transitions, 3841 flow. Second operand 15 states and 1052 transitions. [2023-11-12 02:11:12,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 248 transitions, 4708 flow [2023-11-12 02:11:12,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 248 transitions, 4199 flow, removed 248 selfloop flow, removed 2 redundant places. [2023-11-12 02:11:12,535 INFO L231 Difference]: Finished difference. Result has 169 places, 205 transitions, 3804 flow [2023-11-12 02:11:12,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=3368, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3804, PETRI_PLACES=169, PETRI_TRANSITIONS=205} [2023-11-12 02:11:12,536 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 149 predicate places. [2023-11-12 02:11:12,536 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 205 transitions, 3804 flow [2023-11-12 02:11:12,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 67.25) internal successors, (1076), 16 states have internal predecessors, (1076), 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 02:11:12,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:11:12,538 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:12,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:12,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:12,744 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:11:12,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:12,746 INFO L85 PathProgramCache]: Analyzing trace with hash 433619877, now seen corresponding path program 15 times [2023-11-12 02:11:12,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:12,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443115031] [2023-11-12 02:11:12,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:12,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:11:12,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:12,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443115031] [2023-11-12 02:11:12,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443115031] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:12,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626558748] [2023-11-12 02:11:12,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:11:12,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:12,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:12,873 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:12,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-12 02:11:12,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:11:12,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:11:12,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:11:12,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:11:13,034 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:11:13,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626558748] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:13,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:11:13,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2023-11-12 02:11:13,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143592389] [2023-11-12 02:11:13,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:13,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:11:13,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:13,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:11:13,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:11:13,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:11:13,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 205 transitions, 3804 flow. Second operand has 6 states, 6 states have (on average 67.5) internal successors, (405), 6 states have internal predecessors, (405), 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 02:11:13,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:11:13,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:11:13,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:11:13,484 INFO L124 PetriNetUnfolderBase]: 523/1083 cut-off events. [2023-11-12 02:11:13,484 INFO L125 PetriNetUnfolderBase]: For 19150/19150 co-relation queries the response was YES. [2023-11-12 02:11:13,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8680 conditions, 1083 events. 523/1083 cut-off events. For 19150/19150 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6416 event pairs, 33 based on Foata normal form. 14/1096 useless extension candidates. Maximal degree in co-relation 8072. Up to 389 conditions per place. [2023-11-12 02:11:13,497 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 148 selfloop transitions, 15 changer transitions 66/231 dead transitions. [2023-11-12 02:11:13,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 231 transitions, 4583 flow [2023-11-12 02:11:13,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:11:13,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:11:13,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 423 transitions. [2023-11-12 02:11:13,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47 [2023-11-12 02:11:13,501 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 423 transitions. [2023-11-12 02:11:13,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 423 transitions. [2023-11-12 02:11:13,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:11:13,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 423 transitions. [2023-11-12 02:11:13,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 70.5) internal successors, (423), 6 states have internal predecessors, (423), 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 02:11:13,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 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 02:11:13,505 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 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 02:11:13,506 INFO L175 Difference]: Start difference. First operand has 169 places, 205 transitions, 3804 flow. Second operand 6 states and 423 transitions. [2023-11-12 02:11:13,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 231 transitions, 4583 flow [2023-11-12 02:11:13,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 231 transitions, 4336 flow, removed 32 selfloop flow, removed 7 redundant places. [2023-11-12 02:11:13,607 INFO L231 Difference]: Finished difference. Result has 169 places, 158 transitions, 2818 flow [2023-11-12 02:11:13,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=3562, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2818, PETRI_PLACES=169, PETRI_TRANSITIONS=158} [2023-11-12 02:11:13,607 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 149 predicate places. [2023-11-12 02:11:13,608 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 158 transitions, 2818 flow [2023-11-12 02:11:13,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 67.5) internal successors, (405), 6 states have internal predecessors, (405), 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 02:11:13,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:11:13,608 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:13,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:13,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:13,815 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:11:13,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:13,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1228838583, now seen corresponding path program 16 times [2023-11-12 02:11:13,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:13,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989341047] [2023-11-12 02:11:13,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:13,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:11:13,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:13,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989341047] [2023-11-12 02:11:13,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989341047] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:13,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614804383] [2023-11-12 02:11:13,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:11:13,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:13,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:13,897 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:13,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-12 02:11:13,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:11:13,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:11:13,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:11:13,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:14,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:14,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:14,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614804383] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:14,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:14,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-11-12 02:11:14,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608598897] [2023-11-12 02:11:14,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:14,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 02:11:14,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:14,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 02:11:14,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:11:14,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:11:14,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 158 transitions, 2818 flow. Second operand has 16 states, 16 states have (on average 67.25) internal successors, (1076), 16 states have internal predecessors, (1076), 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 02:11:14,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:11:14,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:11:14,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:11:14,894 INFO L124 PetriNetUnfolderBase]: 335/695 cut-off events. [2023-11-12 02:11:14,894 INFO L125 PetriNetUnfolderBase]: For 19550/19550 co-relation queries the response was YES. [2023-11-12 02:11:14,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6191 conditions, 695 events. 335/695 cut-off events. For 19550/19550 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3604 event pairs, 24 based on Foata normal form. 22/716 useless extension candidates. Maximal degree in co-relation 6064. Up to 178 conditions per place. [2023-11-12 02:11:14,902 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 104 selfloop transitions, 94 changer transitions 20/220 dead transitions. [2023-11-12 02:11:14,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 220 transitions, 4452 flow [2023-11-12 02:11:14,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 02:11:14,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-12 02:11:14,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1181 transitions. [2023-11-12 02:11:14,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4631372549019608 [2023-11-12 02:11:14,906 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1181 transitions. [2023-11-12 02:11:14,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1181 transitions. [2023-11-12 02:11:14,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:11:14,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1181 transitions. [2023-11-12 02:11:14,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 69.47058823529412) internal successors, (1181), 17 states have internal predecessors, (1181), 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 02:11:14,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 150.0) internal successors, (2700), 18 states have internal predecessors, (2700), 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 02:11:14,915 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 150.0) internal successors, (2700), 18 states have internal predecessors, (2700), 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 02:11:14,915 INFO L175 Difference]: Start difference. First operand has 169 places, 158 transitions, 2818 flow. Second operand 17 states and 1181 transitions. [2023-11-12 02:11:14,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 220 transitions, 4452 flow [2023-11-12 02:11:14,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 220 transitions, 4160 flow, removed 93 selfloop flow, removed 13 redundant places. [2023-11-12 02:11:14,988 INFO L231 Difference]: Finished difference. Result has 172 places, 171 transitions, 3418 flow [2023-11-12 02:11:14,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=2639, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3418, PETRI_PLACES=172, PETRI_TRANSITIONS=171} [2023-11-12 02:11:14,989 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 152 predicate places. [2023-11-12 02:11:14,990 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 171 transitions, 3418 flow [2023-11-12 02:11:14,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 67.25) internal successors, (1076), 16 states have internal predecessors, (1076), 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 02:11:14,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:11:14,990 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:14,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:15,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:15,197 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:11:15,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:15,197 INFO L85 PathProgramCache]: Analyzing trace with hash -374920777, now seen corresponding path program 17 times [2023-11-12 02:11:15,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:15,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838215745] [2023-11-12 02:11:15,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:15,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:15,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:15,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:15,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838215745] [2023-11-12 02:11:15,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838215745] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:15,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140795817] [2023-11-12 02:11:15,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:11:15,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:15,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:15,316 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:15,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-12 02:11:15,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-12 02:11:15,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:11:15,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:11:15,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:15,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:15,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140795817] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:15,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:15,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-11-12 02:11:15,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766104386] [2023-11-12 02:11:15,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:15,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:11:15,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:15,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:11:15,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:11:15,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:11:15,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 171 transitions, 3418 flow. Second operand has 15 states, 15 states have (on average 67.26666666666667) internal successors, (1009), 15 states have internal predecessors, (1009), 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 02:11:15,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:11:15,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:11:15,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:11:16,077 INFO L124 PetriNetUnfolderBase]: 338/664 cut-off events. [2023-11-12 02:11:16,077 INFO L125 PetriNetUnfolderBase]: For 14144/14144 co-relation queries the response was YES. [2023-11-12 02:11:16,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6178 conditions, 664 events. 338/664 cut-off events. For 14144/14144 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3176 event pairs, 4 based on Foata normal form. 8/671 useless extension candidates. Maximal degree in co-relation 6036. Up to 273 conditions per place. [2023-11-12 02:11:16,088 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 113 selfloop transitions, 104 changer transitions 0/219 dead transitions. [2023-11-12 02:11:16,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 219 transitions, 4364 flow [2023-11-12 02:11:16,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:11:16,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-12 02:11:16,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 971 transitions. [2023-11-12 02:11:16,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4623809523809524 [2023-11-12 02:11:16,091 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 971 transitions. [2023-11-12 02:11:16,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 971 transitions. [2023-11-12 02:11:16,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:11:16,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 971 transitions. [2023-11-12 02:11:16,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 69.35714285714286) internal successors, (971), 14 states have internal predecessors, (971), 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 02:11:16,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 150.0) internal successors, (2250), 15 states have internal predecessors, (2250), 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 02:11:16,098 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 150.0) internal successors, (2250), 15 states have internal predecessors, (2250), 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 02:11:16,098 INFO L175 Difference]: Start difference. First operand has 172 places, 171 transitions, 3418 flow. Second operand 14 states and 971 transitions. [2023-11-12 02:11:16,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 219 transitions, 4364 flow [2023-11-12 02:11:16,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 219 transitions, 3848 flow, removed 194 selfloop flow, removed 12 redundant places. [2023-11-12 02:11:16,193 INFO L231 Difference]: Finished difference. Result has 178 places, 191 transitions, 3722 flow [2023-11-12 02:11:16,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=2890, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3722, PETRI_PLACES=178, PETRI_TRANSITIONS=191} [2023-11-12 02:11:16,194 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 158 predicate places. [2023-11-12 02:11:16,194 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 191 transitions, 3722 flow [2023-11-12 02:11:16,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 67.26666666666667) internal successors, (1009), 15 states have internal predecessors, (1009), 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 02:11:16,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:11:16,195 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:16,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:16,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:16,401 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:11:16,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:16,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1029034593, now seen corresponding path program 18 times [2023-11-12 02:11:16,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:16,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263609854] [2023-11-12 02:11:16,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:16,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:16,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:16,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:16,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263609854] [2023-11-12 02:11:16,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263609854] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:16,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284972413] [2023-11-12 02:11:16,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:11:16,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:16,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:16,487 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:16,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-12 02:11:16,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-12 02:11:16,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:11:16,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:11:16,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:16,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:16,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:16,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284972413] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:16,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:16,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-11-12 02:11:16,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324521331] [2023-11-12 02:11:16,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:16,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:11:16,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:16,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:11:16,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:11:16,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:11:16,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 191 transitions, 3722 flow. Second operand has 15 states, 15 states have (on average 67.26666666666667) internal successors, (1009), 15 states have internal predecessors, (1009), 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 02:11:16,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:11:16,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:11:16,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:11:17,289 INFO L124 PetriNetUnfolderBase]: 364/716 cut-off events. [2023-11-12 02:11:17,290 INFO L125 PetriNetUnfolderBase]: For 14058/14058 co-relation queries the response was YES. [2023-11-12 02:11:17,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6393 conditions, 716 events. 364/716 cut-off events. For 14058/14058 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3452 event pairs, 22 based on Foata normal form. 8/723 useless extension candidates. Maximal degree in co-relation 6104. Up to 223 conditions per place. [2023-11-12 02:11:17,300 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 111 selfloop transitions, 117 changer transitions 6/236 dead transitions. [2023-11-12 02:11:17,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 236 transitions, 4739 flow [2023-11-12 02:11:17,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:11:17,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-12 02:11:17,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 903 transitions. [2023-11-12 02:11:17,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46307692307692305 [2023-11-12 02:11:17,302 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 903 transitions. [2023-11-12 02:11:17,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 903 transitions. [2023-11-12 02:11:17,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:11:17,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 903 transitions. [2023-11-12 02:11:17,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 69.46153846153847) internal successors, (903), 13 states have internal predecessors, (903), 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 02:11:17,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 150.0) internal successors, (2100), 14 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:17,309 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 150.0) internal successors, (2100), 14 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:17,309 INFO L175 Difference]: Start difference. First operand has 178 places, 191 transitions, 3722 flow. Second operand 13 states and 903 transitions. [2023-11-12 02:11:17,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 236 transitions, 4739 flow [2023-11-12 02:11:17,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 236 transitions, 4623 flow, removed 55 selfloop flow, removed 2 redundant places. [2023-11-12 02:11:17,402 INFO L231 Difference]: Finished difference. Result has 189 places, 206 transitions, 4136 flow [2023-11-12 02:11:17,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=3618, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4136, PETRI_PLACES=189, PETRI_TRANSITIONS=206} [2023-11-12 02:11:17,404 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 169 predicate places. [2023-11-12 02:11:17,404 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 206 transitions, 4136 flow [2023-11-12 02:11:17,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 67.26666666666667) internal successors, (1009), 15 states have internal predecessors, (1009), 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 02:11:17,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:11:17,405 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:17,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:17,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:17,611 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:11:17,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:17,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1533326577, now seen corresponding path program 19 times [2023-11-12 02:11:17,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:17,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637464198] [2023-11-12 02:11:17,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:17,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:17,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:17,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:17,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637464198] [2023-11-12 02:11:17,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637464198] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:17,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831442504] [2023-11-12 02:11:17,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:11:17,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:17,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:17,692 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:17,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-12 02:11:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:17,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:11:17,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:17,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:17,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:17,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831442504] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:17,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:17,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-11-12 02:11:17,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332361607] [2023-11-12 02:11:17,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:17,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 02:11:17,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:17,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 02:11:17,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:11:18,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:11:18,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 206 transitions, 4136 flow. Second operand has 16 states, 16 states have (on average 67.25) internal successors, (1076), 16 states have internal predecessors, (1076), 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 02:11:18,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:11:18,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:11:18,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:11:18,508 INFO L124 PetriNetUnfolderBase]: 390/780 cut-off events. [2023-11-12 02:11:18,508 INFO L125 PetriNetUnfolderBase]: For 20180/20180 co-relation queries the response was YES. [2023-11-12 02:11:18,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7628 conditions, 780 events. 390/780 cut-off events. For 20180/20180 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3923 event pairs, 28 based on Foata normal form. 6/785 useless extension candidates. Maximal degree in co-relation 7322. Up to 193 conditions per place. [2023-11-12 02:11:18,517 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 107 selfloop transitions, 142 changer transitions 10/261 dead transitions. [2023-11-12 02:11:18,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 261 transitions, 5608 flow [2023-11-12 02:11:18,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 02:11:18,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-12 02:11:18,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1046 transitions. [2023-11-12 02:11:18,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4648888888888889 [2023-11-12 02:11:18,527 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1046 transitions. [2023-11-12 02:11:18,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1046 transitions. [2023-11-12 02:11:18,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:11:18,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1046 transitions. [2023-11-12 02:11:18,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 69.73333333333333) internal successors, (1046), 15 states have internal predecessors, (1046), 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 02:11:18,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 150.0) internal successors, (2400), 16 states have internal predecessors, (2400), 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 02:11:18,535 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 150.0) internal successors, (2400), 16 states have internal predecessors, (2400), 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 02:11:18,536 INFO L175 Difference]: Start difference. First operand has 189 places, 206 transitions, 4136 flow. Second operand 15 states and 1046 transitions. [2023-11-12 02:11:18,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 261 transitions, 5608 flow [2023-11-12 02:11:18,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 261 transitions, 5459 flow, removed 34 selfloop flow, removed 5 redundant places. [2023-11-12 02:11:18,681 INFO L231 Difference]: Finished difference. Result has 202 places, 220 transitions, 4955 flow [2023-11-12 02:11:18,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=3993, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4955, PETRI_PLACES=202, PETRI_TRANSITIONS=220} [2023-11-12 02:11:18,683 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 182 predicate places. [2023-11-12 02:11:18,683 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 220 transitions, 4955 flow [2023-11-12 02:11:18,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 67.25) internal successors, (1076), 16 states have internal predecessors, (1076), 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 02:11:18,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:11:18,684 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:18,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:18,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-12 02:11:18,891 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:11:18,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:18,891 INFO L85 PathProgramCache]: Analyzing trace with hash 2102818163, now seen corresponding path program 20 times [2023-11-12 02:11:18,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:18,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129457788] [2023-11-12 02:11:18,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:18,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:19,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:19,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:19,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129457788] [2023-11-12 02:11:19,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129457788] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:19,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652143948] [2023-11-12 02:11:19,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:11:19,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:19,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:19,060 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:19,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-12 02:11:19,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:11:19,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:11:19,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 02:11:19,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:19,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:11:19,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652143948] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:19,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:19,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 4] total 18 [2023-11-12 02:11:19,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942544107] [2023-11-12 02:11:19,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:19,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-12 02:11:19,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:19,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-12 02:11:19,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2023-11-12 02:11:19,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:11:19,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 220 transitions, 4955 flow. Second operand has 20 states, 20 states have (on average 67.3) internal successors, (1346), 20 states have internal predecessors, (1346), 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 02:11:19,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:11:19,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:11:19,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:11:20,170 INFO L124 PetriNetUnfolderBase]: 489/976 cut-off events. [2023-11-12 02:11:20,170 INFO L125 PetriNetUnfolderBase]: For 41312/41312 co-relation queries the response was YES. [2023-11-12 02:11:20,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10403 conditions, 976 events. 489/976 cut-off events. For 41312/41312 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5249 event pairs, 40 based on Foata normal form. 38/1013 useless extension candidates. Maximal degree in co-relation 10089. Up to 600 conditions per place. [2023-11-12 02:11:20,182 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 192 selfloop transitions, 84 changer transitions 33/311 dead transitions. [2023-11-12 02:11:20,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 311 transitions, 7205 flow [2023-11-12 02:11:20,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:11:20,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-12 02:11:20,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 933 transitions. [2023-11-12 02:11:20,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47846153846153844 [2023-11-12 02:11:20,192 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 933 transitions. [2023-11-12 02:11:20,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 933 transitions. [2023-11-12 02:11:20,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:11:20,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 933 transitions. [2023-11-12 02:11:20,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 71.76923076923077) internal successors, (933), 13 states have internal predecessors, (933), 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 02:11:20,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 150.0) internal successors, (2100), 14 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:20,231 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 150.0) internal successors, (2100), 14 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:20,231 INFO L175 Difference]: Start difference. First operand has 202 places, 220 transitions, 4955 flow. Second operand 13 states and 933 transitions. [2023-11-12 02:11:20,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 311 transitions, 7205 flow [2023-11-12 02:11:20,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 311 transitions, 6872 flow, removed 99 selfloop flow, removed 7 redundant places. [2023-11-12 02:11:20,415 INFO L231 Difference]: Finished difference. Result has 213 places, 259 transitions, 5972 flow [2023-11-12 02:11:20,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=4690, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5972, PETRI_PLACES=213, PETRI_TRANSITIONS=259} [2023-11-12 02:11:20,416 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 193 predicate places. [2023-11-12 02:11:20,417 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 259 transitions, 5972 flow [2023-11-12 02:11:20,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 67.3) internal successors, (1346), 20 states have internal predecessors, (1346), 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 02:11:20,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:11:20,418 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:20,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:20,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-12 02:11:20,623 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:11:20,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:20,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1960499539, now seen corresponding path program 21 times [2023-11-12 02:11:20,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:20,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524970521] [2023-11-12 02:11:20,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:20,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:20,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:11:20,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:20,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524970521] [2023-11-12 02:11:20,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524970521] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:20,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092741226] [2023-11-12 02:11:20,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:11:20,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:20,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:20,780 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:20,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-12 02:11:20,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 02:11:20,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:11:20,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:11:20,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:20,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:11:20,950 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:11:20,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092741226] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:20,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:11:20,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2023-11-12 02:11:20,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316991793] [2023-11-12 02:11:20,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:20,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:11:20,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:20,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:11:20,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:11:21,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:11:21,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 259 transitions, 5972 flow. Second operand has 6 states, 6 states have (on average 67.5) internal successors, (405), 6 states have internal predecessors, (405), 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 02:11:21,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:11:21,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:11:21,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:11:21,303 INFO L124 PetriNetUnfolderBase]: 477/952 cut-off events. [2023-11-12 02:11:21,303 INFO L125 PetriNetUnfolderBase]: For 31891/31894 co-relation queries the response was YES. [2023-11-12 02:11:21,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10236 conditions, 952 events. 477/952 cut-off events. For 31891/31894 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5169 event pairs, 20 based on Foata normal form. 13/963 useless extension candidates. Maximal degree in co-relation 9972. Up to 561 conditions per place. [2023-11-12 02:11:21,313 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 24 selfloop transitions, 2 changer transitions 257/285 dead transitions. [2023-11-12 02:11:21,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 285 transitions, 6947 flow [2023-11-12 02:11:21,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:11:21,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:11:21,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 420 transitions. [2023-11-12 02:11:21,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-11-12 02:11:21,315 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 420 transitions. [2023-11-12 02:11:21,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 420 transitions. [2023-11-12 02:11:21,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:11:21,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 420 transitions. [2023-11-12 02:11:21,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 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 02:11:21,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 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 02:11:21,319 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 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 02:11:21,319 INFO L175 Difference]: Start difference. First operand has 213 places, 259 transitions, 5972 flow. Second operand 6 states and 420 transitions. [2023-11-12 02:11:21,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 285 transitions, 6947 flow [2023-11-12 02:11:21,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 285 transitions, 6599 flow, removed 148 selfloop flow, removed 3 redundant places. [2023-11-12 02:11:21,514 INFO L231 Difference]: Finished difference. Result has 214 places, 27 transitions, 394 flow [2023-11-12 02:11:21,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=5645, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=394, PETRI_PLACES=214, PETRI_TRANSITIONS=27} [2023-11-12 02:11:21,515 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 194 predicate places. [2023-11-12 02:11:21,515 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 27 transitions, 394 flow [2023-11-12 02:11:21,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 67.5) internal successors, (405), 6 states have internal predecessors, (405), 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 02:11:21,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:11:21,516 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:21,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:21,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:21,716 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:11:21,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:21,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1635941957, now seen corresponding path program 22 times [2023-11-12 02:11:21,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:21,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025576333] [2023-11-12 02:11:21,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:21,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:21,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:21,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025576333] [2023-11-12 02:11:21,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025576333] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:21,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868703929] [2023-11-12 02:11:21,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:11:21,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:21,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:21,804 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:21,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-12 02:11:21,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:11:21,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:11:21,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:11:21,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:22,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:22,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868703929] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:22,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:22,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 20 [2023-11-12 02:11:22,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726840346] [2023-11-12 02:11:22,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:22,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 02:11:22,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:22,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 02:11:22,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:11:22,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:11:22,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 27 transitions, 394 flow. Second operand has 21 states, 21 states have (on average 67.0) internal successors, (1407), 21 states have internal predecessors, (1407), 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 02:11:22,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:11:22,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:11:22,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:11:22,550 INFO L124 PetriNetUnfolderBase]: 44/112 cut-off events. [2023-11-12 02:11:22,550 INFO L125 PetriNetUnfolderBase]: For 2890/2890 co-relation queries the response was YES. [2023-11-12 02:11:22,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1092 conditions, 112 events. 44/112 cut-off events. For 2890/2890 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 282 event pairs, 4 based on Foata normal form. 4/116 useless extension candidates. Maximal degree in co-relation 1014. Up to 36 conditions per place. [2023-11-12 02:11:22,552 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 31 selfloop transitions, 6 changer transitions 15/54 dead transitions. [2023-11-12 02:11:22,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 54 transitions, 707 flow [2023-11-12 02:11:22,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:11:22,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-12 02:11:22,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 764 transitions. [2023-11-12 02:11:22,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.463030303030303 [2023-11-12 02:11:22,554 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 764 transitions. [2023-11-12 02:11:22,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 764 transitions. [2023-11-12 02:11:22,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:11:22,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 764 transitions. [2023-11-12 02:11:22,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 69.45454545454545) internal successors, (764), 11 states have internal predecessors, (764), 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 02:11:22,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 150.0) internal successors, (1800), 12 states have internal predecessors, (1800), 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 02:11:22,560 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 150.0) internal successors, (1800), 12 states have internal predecessors, (1800), 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 02:11:22,560 INFO L175 Difference]: Start difference. First operand has 214 places, 27 transitions, 394 flow. Second operand 11 states and 764 transitions. [2023-11-12 02:11:22,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 54 transitions, 707 flow [2023-11-12 02:11:22,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 54 transitions, 349 flow, removed 92 selfloop flow, removed 70 redundant places. [2023-11-12 02:11:22,569 INFO L231 Difference]: Finished difference. Result has 85 places, 23 transitions, 120 flow [2023-11-12 02:11:22,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=120, PETRI_PLACES=85, PETRI_TRANSITIONS=23} [2023-11-12 02:11:22,570 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 65 predicate places. [2023-11-12 02:11:22,570 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 23 transitions, 120 flow [2023-11-12 02:11:22,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 67.0) internal successors, (1407), 21 states have internal predecessors, (1407), 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 02:11:22,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:11:22,571 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:22,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:22,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-12 02:11:22,777 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:11:22,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:22,777 INFO L85 PathProgramCache]: Analyzing trace with hash 914602225, now seen corresponding path program 23 times [2023-11-12 02:11:22,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:22,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340965567] [2023-11-12 02:11:22,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:22,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:22,954 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:22,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:22,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340965567] [2023-11-12 02:11:22,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340965567] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:22,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935356849] [2023-11-12 02:11:22,956 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:11:22,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:22,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:22,974 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:22,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-12 02:11:23,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-12 02:11:23,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:11:23,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-12 02:11:23,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:23,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:23,389 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:11:23,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935356849] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:23,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:23,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 5] total 23 [2023-11-12 02:11:23,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575590133] [2023-11-12 02:11:23,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:23,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-12 02:11:23,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:23,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-12 02:11:23,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2023-11-12 02:11:23,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:11:23,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 23 transitions, 120 flow. Second operand has 25 states, 25 states have (on average 67.2) internal successors, (1680), 25 states have internal predecessors, (1680), 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 02:11:23,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:11:23,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:11:23,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:11:23,971 INFO L124 PetriNetUnfolderBase]: 55/135 cut-off events. [2023-11-12 02:11:23,971 INFO L125 PetriNetUnfolderBase]: For 320/320 co-relation queries the response was YES. [2023-11-12 02:11:23,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 725 conditions, 135 events. 55/135 cut-off events. For 320/320 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 345 event pairs, 8 based on Foata normal form. 1/136 useless extension candidates. Maximal degree in co-relation 694. Up to 27 conditions per place. [2023-11-12 02:11:23,974 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 36 selfloop transitions, 16 changer transitions 15/69 dead transitions. [2023-11-12 02:11:23,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 69 transitions, 459 flow [2023-11-12 02:11:23,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:11:23,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-12 02:11:23,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1108 transitions. [2023-11-12 02:11:23,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46166666666666667 [2023-11-12 02:11:23,983 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1108 transitions. [2023-11-12 02:11:23,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1108 transitions. [2023-11-12 02:11:23,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:11:23,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1108 transitions. [2023-11-12 02:11:23,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 69.25) internal successors, (1108), 16 states have internal predecessors, (1108), 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 02:11:23,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 150.0) internal successors, (2550), 17 states have internal predecessors, (2550), 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 02:11:23,995 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 150.0) internal successors, (2550), 17 states have internal predecessors, (2550), 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 02:11:23,996 INFO L175 Difference]: Start difference. First operand has 85 places, 23 transitions, 120 flow. Second operand 16 states and 1108 transitions. [2023-11-12 02:11:23,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 69 transitions, 459 flow [2023-11-12 02:11:23,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 69 transitions, 434 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-11-12 02:11:23,999 INFO L231 Difference]: Finished difference. Result has 89 places, 30 transitions, 191 flow [2023-11-12 02:11:23,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=191, PETRI_PLACES=89, PETRI_TRANSITIONS=30} [2023-11-12 02:11:24,003 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 69 predicate places. [2023-11-12 02:11:24,004 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 30 transitions, 191 flow [2023-11-12 02:11:24,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 67.2) internal successors, (1680), 25 states have internal predecessors, (1680), 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 02:11:24,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:11:24,005 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:24,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:24,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-12 02:11:24,210 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:11:24,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:24,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1573498931, now seen corresponding path program 24 times [2023-11-12 02:11:24,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:24,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323833844] [2023-11-12 02:11:24,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:24,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:24,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:24,313 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:24,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:24,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323833844] [2023-11-12 02:11:24,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323833844] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:24,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333608986] [2023-11-12 02:11:24,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:11:24,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:24,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:24,315 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:24,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-12 02:11:24,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-12 02:11:24,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:11:24,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:11:24,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 02:11:24,517 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:11:24,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333608986] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:24,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:11:24,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-11-12 02:11:24,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801738823] [2023-11-12 02:11:24,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:24,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:11:24,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:24,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:11:24,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:11:24,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:11:24,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 30 transitions, 191 flow. Second operand has 6 states, 6 states have (on average 67.5) internal successors, (405), 6 states have internal predecessors, (405), 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 02:11:24,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:11:24,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:11:24,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:11:24,622 INFO L124 PetriNetUnfolderBase]: 47/137 cut-off events. [2023-11-12 02:11:24,622 INFO L125 PetriNetUnfolderBase]: For 208/208 co-relation queries the response was YES. [2023-11-12 02:11:24,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 137 events. 47/137 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 413 event pairs, 0 based on Foata normal form. 1/138 useless extension candidates. Maximal degree in co-relation 664. Up to 39 conditions per place. [2023-11-12 02:11:24,624 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 29 selfloop transitions, 4 changer transitions 5/40 dead transitions. [2023-11-12 02:11:24,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 40 transitions, 308 flow [2023-11-12 02:11:24,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:11:24,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:11:24,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 416 transitions. [2023-11-12 02:11:24,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622222222222222 [2023-11-12 02:11:24,625 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 416 transitions. [2023-11-12 02:11:24,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 416 transitions. [2023-11-12 02:11:24,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:11:24,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 416 transitions. [2023-11-12 02:11:24,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 69.33333333333333) internal successors, (416), 6 states have internal predecessors, (416), 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 02:11:24,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 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 02:11:24,629 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 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 02:11:24,629 INFO L175 Difference]: Start difference. First operand has 89 places, 30 transitions, 191 flow. Second operand 6 states and 416 transitions. [2023-11-12 02:11:24,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 40 transitions, 308 flow [2023-11-12 02:11:24,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 40 transitions, 270 flow, removed 6 selfloop flow, removed 9 redundant places. [2023-11-12 02:11:24,632 INFO L231 Difference]: Finished difference. Result has 87 places, 30 transitions, 166 flow [2023-11-12 02:11:24,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=87, PETRI_TRANSITIONS=30} [2023-11-12 02:11:24,633 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 67 predicate places. [2023-11-12 02:11:24,633 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 30 transitions, 166 flow [2023-11-12 02:11:24,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 67.5) internal successors, (405), 6 states have internal predecessors, (405), 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 02:11:24,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:11:24,633 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:24,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:24,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-12 02:11:24,839 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:11:24,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:24,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1545793301, now seen corresponding path program 25 times [2023-11-12 02:11:24,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:24,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279630015] [2023-11-12 02:11:24,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:24,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:24,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:24,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:24,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279630015] [2023-11-12 02:11:24,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279630015] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:24,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704996892] [2023-11-12 02:11:24,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:11:24,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:24,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:24,948 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:24,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-12 02:11:25,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:25,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:11:25,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:25,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:25,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704996892] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:25,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:25,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 25 [2023-11-12 02:11:25,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918963822] [2023-11-12 02:11:25,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:25,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-12 02:11:25,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:25,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-12 02:11:25,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2023-11-12 02:11:25,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:11:25,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 30 transitions, 166 flow. Second operand has 26 states, 26 states have (on average 66.84615384615384) internal successors, (1738), 26 states have internal predecessors, (1738), 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 02:11:25,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:11:25,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:11:25,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:11:25,802 INFO L124 PetriNetUnfolderBase]: 43/127 cut-off events. [2023-11-12 02:11:25,802 INFO L125 PetriNetUnfolderBase]: For 239/239 co-relation queries the response was YES. [2023-11-12 02:11:25,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 127 events. 43/127 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 360 event pairs, 0 based on Foata normal form. 4/131 useless extension candidates. Maximal degree in co-relation 550. Up to 44 conditions per place. [2023-11-12 02:11:25,803 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 32 selfloop transitions, 7 changer transitions 24/65 dead transitions. [2023-11-12 02:11:25,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 65 transitions, 451 flow [2023-11-12 02:11:25,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:11:25,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-12 02:11:25,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 969 transitions. [2023-11-12 02:11:25,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4614285714285714 [2023-11-12 02:11:25,806 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 969 transitions. [2023-11-12 02:11:25,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 969 transitions. [2023-11-12 02:11:25,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:11:25,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 969 transitions. [2023-11-12 02:11:25,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 69.21428571428571) internal successors, (969), 14 states have internal predecessors, (969), 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 02:11:25,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 150.0) internal successors, (2250), 15 states have internal predecessors, (2250), 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 02:11:25,811 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 150.0) internal successors, (2250), 15 states have internal predecessors, (2250), 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 02:11:25,812 INFO L175 Difference]: Start difference. First operand has 87 places, 30 transitions, 166 flow. Second operand 14 states and 969 transitions. [2023-11-12 02:11:25,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 65 transitions, 451 flow [2023-11-12 02:11:25,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 65 transitions, 440 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-12 02:11:25,815 INFO L231 Difference]: Finished difference. Result has 97 places, 25 transitions, 143 flow [2023-11-12 02:11:25,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=143, PETRI_PLACES=97, PETRI_TRANSITIONS=25} [2023-11-12 02:11:25,816 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 77 predicate places. [2023-11-12 02:11:25,816 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 25 transitions, 143 flow [2023-11-12 02:11:25,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 66.84615384615384) internal successors, (1738), 26 states have internal predecessors, (1738), 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 02:11:25,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:11:25,817 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:25,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:26,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:26,023 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:11:26,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:26,023 INFO L85 PathProgramCache]: Analyzing trace with hash -155725149, now seen corresponding path program 26 times [2023-11-12 02:11:26,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:26,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27495638] [2023-11-12 02:11:26,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:26,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:26,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:26,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27495638] [2023-11-12 02:11:26,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27495638] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:26,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124729313] [2023-11-12 02:11:26,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:11:26,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:26,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:26,244 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:26,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-12 02:11:26,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:11:26,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:11:26,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 02:11:26,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:26,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:26,758 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:11:26,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124729313] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:26,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:26,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 6] total 28 [2023-11-12 02:11:26,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602485810] [2023-11-12 02:11:26,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:26,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-12 02:11:26,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:26,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-12 02:11:26,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2023-11-12 02:11:27,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:11:27,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 25 transitions, 143 flow. Second operand has 30 states, 30 states have (on average 66.93333333333334) internal successors, (2008), 30 states have internal predecessors, (2008), 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 02:11:27,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:11:27,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:11:27,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:11:27,529 INFO L124 PetriNetUnfolderBase]: 50/146 cut-off events. [2023-11-12 02:11:27,529 INFO L125 PetriNetUnfolderBase]: For 334/334 co-relation queries the response was YES. [2023-11-12 02:11:27,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 718 conditions, 146 events. 50/146 cut-off events. For 334/334 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 427 event pairs, 0 based on Foata normal form. 1/147 useless extension candidates. Maximal degree in co-relation 683. Up to 29 conditions per place. [2023-11-12 02:11:27,530 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 41 selfloop transitions, 19 changer transitions 21/83 dead transitions. [2023-11-12 02:11:27,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 83 transitions, 600 flow [2023-11-12 02:11:27,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-12 02:11:27,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-12 02:11:27,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1317 transitions. [2023-11-12 02:11:27,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46210526315789474 [2023-11-12 02:11:27,534 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1317 transitions. [2023-11-12 02:11:27,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1317 transitions. [2023-11-12 02:11:27,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:11:27,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1317 transitions. [2023-11-12 02:11:27,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 69.3157894736842) internal successors, (1317), 19 states have internal predecessors, (1317), 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 02:11:27,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 150.0) internal successors, (3000), 20 states have internal predecessors, (3000), 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 02:11:27,542 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 150.0) internal successors, (3000), 20 states have internal predecessors, (3000), 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 02:11:27,542 INFO L175 Difference]: Start difference. First operand has 97 places, 25 transitions, 143 flow. Second operand 19 states and 1317 transitions. [2023-11-12 02:11:27,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 83 transitions, 600 flow [2023-11-12 02:11:27,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 83 transitions, 555 flow, removed 15 selfloop flow, removed 9 redundant places. [2023-11-12 02:11:27,545 INFO L231 Difference]: Finished difference. Result has 99 places, 33 transitions, 225 flow [2023-11-12 02:11:27,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=225, PETRI_PLACES=99, PETRI_TRANSITIONS=33} [2023-11-12 02:11:27,546 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 79 predicate places. [2023-11-12 02:11:27,546 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 33 transitions, 225 flow [2023-11-12 02:11:27,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 66.93333333333334) internal successors, (2008), 30 states have internal predecessors, (2008), 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 02:11:27,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:11:27,547 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:27,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:27,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-12 02:11:27,753 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:11:27,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:27,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1832551805, now seen corresponding path program 27 times [2023-11-12 02:11:27,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:27,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371100369] [2023-11-12 02:11:27,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:27,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:27,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:27,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371100369] [2023-11-12 02:11:27,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371100369] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:27,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369382387] [2023-11-12 02:11:27,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:11:27,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:27,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:27,896 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:27,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-12 02:11:27,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 02:11:27,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:11:27,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:11:27,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-12 02:11:28,084 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:11:28,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369382387] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:28,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:11:28,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-11-12 02:11:28,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927266648] [2023-11-12 02:11:28,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:28,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:11:28,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:28,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:11:28,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:11:28,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:11:28,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 33 transitions, 225 flow. Second operand has 6 states, 6 states have (on average 67.5) internal successors, (405), 6 states have internal predecessors, (405), 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 02:11:28,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:11:28,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:11:28,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:11:28,178 INFO L124 PetriNetUnfolderBase]: 48/143 cut-off events. [2023-11-12 02:11:28,178 INFO L125 PetriNetUnfolderBase]: For 166/166 co-relation queries the response was YES. [2023-11-12 02:11:28,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 693 conditions, 143 events. 48/143 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 426 event pairs, 0 based on Foata normal form. 1/144 useless extension candidates. Maximal degree in co-relation 658. Up to 72 conditions per place. [2023-11-12 02:11:28,179 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 0 selfloop transitions, 0 changer transitions 41/41 dead transitions. [2023-11-12 02:11:28,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 41 transitions, 330 flow [2023-11-12 02:11:28,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:11:28,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:11:28,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 414 transitions. [2023-11-12 02:11:28,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2023-11-12 02:11:28,180 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 414 transitions. [2023-11-12 02:11:28,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 414 transitions. [2023-11-12 02:11:28,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:11:28,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 414 transitions. [2023-11-12 02:11:28,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 69.0) internal successors, (414), 6 states have internal predecessors, (414), 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 02:11:28,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 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 02:11:28,183 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 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 02:11:28,184 INFO L175 Difference]: Start difference. First operand has 99 places, 33 transitions, 225 flow. Second operand 6 states and 414 transitions. [2023-11-12 02:11:28,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 41 transitions, 330 flow [2023-11-12 02:11:28,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 41 transitions, 282 flow, removed 7 selfloop flow, removed 12 redundant places. [2023-11-12 02:11:28,186 INFO L231 Difference]: Finished difference. Result has 91 places, 0 transitions, 0 flow [2023-11-12 02:11:28,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=91, PETRI_TRANSITIONS=0} [2023-11-12 02:11:28,187 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 71 predicate places. [2023-11-12 02:11:28,187 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 0 transitions, 0 flow [2023-11-12 02:11:28,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 67.5) internal successors, (405), 6 states have internal predecessors, (405), 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 02:11:28,190 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-12 02:11:28,191 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-12 02:11:28,191 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-12 02:11:28,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:28,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-12 02:11:28,397 INFO L445 BasicCegarLoop]: Path program histogram: [27, 2, 2, 1] [2023-11-12 02:11:28,400 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-12 02:11:28,400 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-11-12 02:11:28,403 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 02:11:28 BasicIcfg [2023-11-12 02:11:28,403 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-12 02:11:28,404 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-12 02:11:28,404 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-12 02:11:28,404 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-12 02:11:28,404 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:10:52" (3/4) ... [2023-11-12 02:11:28,406 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-12 02:11:28,410 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-11-12 02:11:28,410 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-11-12 02:11:28,415 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2023-11-12 02:11:28,415 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-12 02:11:28,416 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-12 02:11:28,416 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-12 02:11:28,491 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/witness.graphml [2023-11-12 02:11:28,491 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/witness.yml [2023-11-12 02:11:28,492 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-12 02:11:28,492 INFO L158 Benchmark]: Toolchain (without parser) took 37256.60ms. Allocated memory was 180.4MB in the beginning and 398.5MB in the end (delta: 218.1MB). Free memory was 137.4MB in the beginning and 336.7MB in the end (delta: -199.3MB). Peak memory consumption was 20.5MB. Max. memory is 16.1GB. [2023-11-12 02:11:28,493 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 180.4MB. Free memory is still 154.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 02:11:28,493 INFO L158 Benchmark]: CACSL2BoogieTranslator took 323.63ms. Allocated memory is still 180.4MB. Free memory was 137.4MB in the beginning and 125.9MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-12 02:11:28,493 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.92ms. Allocated memory is still 180.4MB. Free memory was 125.9MB in the beginning and 124.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 02:11:28,494 INFO L158 Benchmark]: Boogie Preprocessor took 41.35ms. Allocated memory is still 180.4MB. Free memory was 124.4MB in the beginning and 123.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 02:11:28,494 INFO L158 Benchmark]: RCFGBuilder took 435.98ms. Allocated memory is still 180.4MB. Free memory was 123.2MB in the beginning and 110.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-12 02:11:28,495 INFO L158 Benchmark]: TraceAbstraction took 36309.18ms. Allocated memory was 180.4MB in the beginning and 398.5MB in the end (delta: 218.1MB). Free memory was 110.1MB in the beginning and 341.4MB in the end (delta: -231.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 02:11:28,495 INFO L158 Benchmark]: Witness Printer took 87.91ms. Allocated memory is still 398.5MB. Free memory was 341.4MB in the beginning and 336.7MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-12 02:11:28,497 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 180.4MB. Free memory is still 154.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 323.63ms. Allocated memory is still 180.4MB. Free memory was 137.4MB in the beginning and 125.9MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.92ms. Allocated memory is still 180.4MB. Free memory was 125.9MB in the beginning and 124.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 41.35ms. Allocated memory is still 180.4MB. Free memory was 124.4MB in the beginning and 123.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 435.98ms. Allocated memory is still 180.4MB. Free memory was 123.2MB in the beginning and 110.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 36309.18ms. Allocated memory was 180.4MB in the beginning and 398.5MB in the end (delta: 218.1MB). Free memory was 110.1MB in the beginning and 341.4MB in the end (delta: -231.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 87.91ms. Allocated memory is still 398.5MB. Free memory was 341.4MB in the beginning and 336.7MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.8s, 74 PlacesBefore, 20 PlacesAfterwards, 73 TransitionsBefore, 15 TransitionsAfterwards, 432 CoEnabledTransitionPairs, 6 FixpointIterations, 38 TrivialSequentialCompositions, 15 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 66 TotalNumberOfCompositions, 458 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 458, independent: 458, independent conditional: 0, independent unconditional: 458, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 233, independent: 233, independent conditional: 0, independent unconditional: 233, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 458, independent: 225, independent conditional: 0, independent unconditional: 225, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 233, unknown conditional: 0, unknown unconditional: 233] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 70]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 97 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 36.2s, OverallIterations: 32, TraceHistogramMax: 6, PathProgramHistogramMax: 27, EmptinessCheckTime: 0.0s, AutomataDifference: 15.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3456 SdHoareTripleChecker+Valid, 6.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3090 mSDsluCounter, 82 SdHoareTripleChecker+Invalid, 5.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 48 mSDsCounter, 397 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9352 IncrementalHoareTripleChecker+Invalid, 9749 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 397 mSolverCounterUnsat, 34 mSDtfsCounter, 9352 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1151 GetRequests, 677 SyntacticMatches, 17 SemanticMatches, 457 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2506 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5972occurred in iteration=25, InterpolantAutomatonStates: 309, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 8.4s InterpolantComputationTime, 1059 NumberOfCodeBlocks, 1046 NumberOfCodeBlocksAsserted, 95 NumberOfCheckSat, 1365 ConstructedInterpolants, 0 QuantifiedInterpolants, 6183 SizeOfPredicates, 3 NumberOfNonLiveVariables, 3344 ConjunctsInSsa, 228 ConjunctsInUnsatCore, 82 InterpolantComputations, 11 PerfectInterpolantSequences, 355/779 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-12 02:11:28,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aad4d1a-2e09-4c01-bf80-f9ec64e34087/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE