./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 c328ca6a6071aea6db12d1e311bd2e5e22fce6c700c884e61df52925e139f834 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:14:06,467 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:14:06,583 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:14:06,594 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:14:06,595 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:14:06,626 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:14:06,632 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:14:06,633 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:14:06,634 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:14:06,639 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:14:06,641 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:14:06,641 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:14:06,642 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:14:06,643 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:14:06,644 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:14:06,644 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:14:06,645 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:14:06,645 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:14:06,645 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:14:06,646 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:14:06,646 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:14:06,647 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:14:06,647 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:14:06,648 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:14:06,648 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:14:06,649 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:14:06,650 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:14:06,650 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:14:06,650 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:14:06,651 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:14:06,652 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:14:06,652 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:14:06,653 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:14:06,653 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:14:06,653 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:14:06,653 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:14:06,654 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:14:06,654 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:14:06,654 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:14:06,654 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_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c328ca6a6071aea6db12d1e311bd2e5e22fce6c700c884e61df52925e139f834 [2023-11-06 21:14:07,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:14:07,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:14:07,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:14:07,064 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:14:07,065 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:14:07,067 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c [2023-11-06 21:14:10,250 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:14:10,490 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:14:10,490 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c [2023-11-06 21:14:10,500 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/data/fccf1074e/5dfd4344df624696a367d5d69209192c/FLAG7c6ac6689 [2023-11-06 21:14:10,515 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/data/fccf1074e/5dfd4344df624696a367d5d69209192c [2023-11-06 21:14:10,518 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:14:10,519 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:14:10,521 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:14:10,521 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:14:10,531 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:14:10,532 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:14:10" (1/1) ... [2023-11-06 21:14:10,533 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@275fa1be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:10, skipping insertion in model container [2023-11-06 21:14:10,533 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:14:10" (1/1) ... [2023-11-06 21:14:10,568 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:14:10,830 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_69ce07c0-821b-4410-9854-73681f4c5dd6/sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c[2835,2848] [2023-11-06 21:14:10,861 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:14:10,872 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:14:10,911 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_69ce07c0-821b-4410-9854-73681f4c5dd6/sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c[2835,2848] [2023-11-06 21:14:10,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:14:10,925 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:14:10,926 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:14:10,935 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:14:10,936 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:10 WrapperNode [2023-11-06 21:14:10,936 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:14:10,937 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:14:10,938 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:14:10,938 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:14:10,946 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:10" (1/1) ... [2023-11-06 21:14:10,956 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:10" (1/1) ... [2023-11-06 21:14:11,001 INFO L138 Inliner]: procedures = 25, calls = 58, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 288 [2023-11-06 21:14:11,001 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:14:11,002 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:14:11,002 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:14:11,003 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:14:11,013 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:10" (1/1) ... [2023-11-06 21:14:11,013 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:10" (1/1) ... [2023-11-06 21:14:11,020 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:10" (1/1) ... [2023-11-06 21:14:11,020 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:10" (1/1) ... [2023-11-06 21:14:11,032 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:10" (1/1) ... [2023-11-06 21:14:11,037 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:10" (1/1) ... [2023-11-06 21:14:11,040 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:10" (1/1) ... [2023-11-06 21:14:11,043 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:10" (1/1) ... [2023-11-06 21:14:11,047 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:14:11,049 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:14:11,049 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:14:11,049 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:14:11,050 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:10" (1/1) ... [2023-11-06 21:14:11,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:14:11,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:11,105 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:14:11,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:14:11,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:14:11,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:14:11,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:14:11,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:14:11,155 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 21:14:11,156 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 21:14:11,156 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 21:14:11,156 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 21:14:11,156 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 21:14:11,156 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 21:14:11,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:14:11,159 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 21:14:11,159 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 21:14:11,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 21:14:11,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:14:11,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:14:11,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:14:11,162 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 21:14:11,331 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:14:11,333 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:14:11,903 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:14:12,283 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:14:12,283 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-06 21:14:12,286 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:14:12 BoogieIcfgContainer [2023-11-06 21:14:12,286 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:14:12,288 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:14:12,289 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:14:12,292 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:14:12,292 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:14:10" (1/3) ... [2023-11-06 21:14:12,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a329efb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:14:12, skipping insertion in model container [2023-11-06 21:14:12,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:10" (2/3) ... [2023-11-06 21:14:12,299 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a329efb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:14:12, skipping insertion in model container [2023-11-06 21:14:12,299 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:14:12" (3/3) ... [2023-11-06 21:14:12,303 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum.wvr.c [2023-11-06 21:14:12,313 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 21:14:12,324 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:14:12,324 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:14:12,324 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 21:14:12,411 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 21:14:12,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 201 transitions, 423 flow [2023-11-06 21:14:12,575 INFO L124 PetriNetUnfolderBase]: 16/198 cut-off events. [2023-11-06 21:14:12,575 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 21:14:12,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 198 events. 16/198 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 127 event pairs, 0 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 158. Up to 2 conditions per place. [2023-11-06 21:14:12,582 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 201 transitions, 423 flow [2023-11-06 21:14:12,599 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 187 transitions, 392 flow [2023-11-06 21:14:12,603 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 21:14:12,620 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 187 transitions, 392 flow [2023-11-06 21:14:12,622 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 187 transitions, 392 flow [2023-11-06 21:14:12,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 187 transitions, 392 flow [2023-11-06 21:14:12,682 INFO L124 PetriNetUnfolderBase]: 16/187 cut-off events. [2023-11-06 21:14:12,683 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 21:14:12,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 187 events. 16/187 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 126 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 158. Up to 2 conditions per place. [2023-11-06 21:14:12,688 INFO L119 LiptonReduction]: Number of co-enabled transitions 1728 [2023-11-06 21:14:20,680 INFO L134 LiptonReduction]: Checked pairs total: 2393 [2023-11-06 21:14:20,681 INFO L136 LiptonReduction]: Total number of compositions: 195 [2023-11-06 21:14:20,696 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:14:20,703 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=LoopsAndPotentialCycles, 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;@355afacd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:14:20,704 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 21:14:20,711 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 21:14:20,711 INFO L124 PetriNetUnfolderBase]: 5/27 cut-off events. [2023-11-06 21:14:20,711 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 21:14:20,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:20,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:20,713 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:14:20,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:20,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1111518067, now seen corresponding path program 1 times [2023-11-06 21:14:20,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:20,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806317377] [2023-11-06 21:14:20,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:20,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:21,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:14:21,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:21,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806317377] [2023-11-06 21:14:21,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806317377] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:21,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:21,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:14:21,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846701409] [2023-11-06 21:14:21,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:21,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:14:21,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:21,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:14:21,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:21,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 396 [2023-11-06 21:14:21,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:21,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:21,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 396 [2023-11-06 21:14:21,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:21,564 INFO L124 PetriNetUnfolderBase]: 620/871 cut-off events. [2023-11-06 21:14:21,565 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-11-06 21:14:21,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1816 conditions, 871 events. 620/871 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3396 event pairs, 95 based on Foata normal form. 1/580 useless extension candidates. Maximal degree in co-relation 1365. Up to 688 conditions per place. [2023-11-06 21:14:21,580 INFO L140 encePairwiseOnDemand]: 391/396 looper letters, 38 selfloop transitions, 4 changer transitions 1/46 dead transitions. [2023-11-06 21:14:21,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 46 transitions, 211 flow [2023-11-06 21:14:21,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:14:21,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:14:21,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 569 transitions. [2023-11-06 21:14:21,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47895622895622897 [2023-11-06 21:14:21,609 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 569 transitions. [2023-11-06 21:14:21,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 569 transitions. [2023-11-06 21:14:21,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:21,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 569 transitions. [2023-11-06 21:14:21,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:21,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:21,634 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:21,636 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 74 flow. Second operand 3 states and 569 transitions. [2023-11-06 21:14:21,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 46 transitions, 211 flow [2023-11-06 21:14:21,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 46 transitions, 189 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 21:14:21,645 INFO L231 Difference]: Finished difference. Result has 30 places, 31 transitions, 88 flow [2023-11-06 21:14:21,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=30, PETRI_TRANSITIONS=31} [2023-11-06 21:14:21,652 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -3 predicate places. [2023-11-06 21:14:21,652 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 31 transitions, 88 flow [2023-11-06 21:14:21,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:21,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:21,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:21,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:14:21,655 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:14:21,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:21,667 INFO L85 PathProgramCache]: Analyzing trace with hash 3424845, now seen corresponding path program 1 times [2023-11-06 21:14:21,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:21,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944001808] [2023-11-06 21:14:21,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:21,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:14:21,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:21,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944001808] [2023-11-06 21:14:21,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944001808] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:21,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:21,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:14:21,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19549998] [2023-11-06 21:14:21,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:21,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:14:21,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:21,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:14:21,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:14:22,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 396 [2023-11-06 21:14:22,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 170.75) internal successors, (683), 4 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:22,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:22,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 396 [2023-11-06 21:14:22,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:22,258 INFO L124 PetriNetUnfolderBase]: 590/844 cut-off events. [2023-11-06 21:14:22,258 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2023-11-06 21:14:22,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1979 conditions, 844 events. 590/844 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3246 event pairs, 307 based on Foata normal form. 1/658 useless extension candidates. Maximal degree in co-relation 709. Up to 825 conditions per place. [2023-11-06 21:14:22,266 INFO L140 encePairwiseOnDemand]: 391/396 looper letters, 26 selfloop transitions, 4 changer transitions 1/34 dead transitions. [2023-11-06 21:14:22,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 34 transitions, 156 flow [2023-11-06 21:14:22,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:14:22,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:14:22,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 695 transitions. [2023-11-06 21:14:22,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43876262626262624 [2023-11-06 21:14:22,272 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 695 transitions. [2023-11-06 21:14:22,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 695 transitions. [2023-11-06 21:14:22,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:22,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 695 transitions. [2023-11-06 21:14:22,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:22,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:22,286 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:22,287 INFO L175 Difference]: Start difference. First operand has 30 places, 31 transitions, 88 flow. Second operand 4 states and 695 transitions. [2023-11-06 21:14:22,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 34 transitions, 156 flow [2023-11-06 21:14:22,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 34 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:14:22,290 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 110 flow [2023-11-06 21:14:22,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=110, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2023-11-06 21:14:22,298 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 1 predicate places. [2023-11-06 21:14:22,299 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 110 flow [2023-11-06 21:14:22,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 170.75) internal successors, (683), 4 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:22,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:22,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:22,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:14:22,300 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:14:22,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:22,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1577204009, now seen corresponding path program 1 times [2023-11-06 21:14:22,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:22,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086795640] [2023-11-06 21:14:22,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:22,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:22,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:22,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:14:22,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:22,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086795640] [2023-11-06 21:14:22,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086795640] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:22,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:22,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:14:22,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24967878] [2023-11-06 21:14:22,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:22,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:14:22,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:22,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:14:22,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:14:22,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 396 [2023-11-06 21:14:22,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 176.5) internal successors, (706), 4 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:22,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:22,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 396 [2023-11-06 21:14:22,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:22,745 INFO L124 PetriNetUnfolderBase]: 667/945 cut-off events. [2023-11-06 21:14:22,746 INFO L125 PetriNetUnfolderBase]: For 175/175 co-relation queries the response was YES. [2023-11-06 21:14:22,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2165 conditions, 945 events. 667/945 cut-off events. For 175/175 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3610 event pairs, 185 based on Foata normal form. 0/804 useless extension candidates. Maximal degree in co-relation 2141. Up to 529 conditions per place. [2023-11-06 21:14:22,756 INFO L140 encePairwiseOnDemand]: 391/396 looper letters, 39 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2023-11-06 21:14:22,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 46 transitions, 234 flow [2023-11-06 21:14:22,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:14:22,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:14:22,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 722 transitions. [2023-11-06 21:14:22,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45580808080808083 [2023-11-06 21:14:22,760 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 722 transitions. [2023-11-06 21:14:22,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 722 transitions. [2023-11-06 21:14:22,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:22,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 722 transitions. [2023-11-06 21:14:22,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 180.5) internal successors, (722), 4 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:22,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:22,769 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:22,770 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 110 flow. Second operand 4 states and 722 transitions. [2023-11-06 21:14:22,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 46 transitions, 234 flow [2023-11-06 21:14:22,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 46 transitions, 224 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-06 21:14:22,773 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 125 flow [2023-11-06 21:14:22,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=125, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2023-11-06 21:14:22,775 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2023-11-06 21:14:22,779 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 125 flow [2023-11-06 21:14:22,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 176.5) internal successors, (706), 4 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:22,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:22,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:22,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:14:22,781 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:14:22,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:22,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1502370308, now seen corresponding path program 1 times [2023-11-06 21:14:22,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:22,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339724658] [2023-11-06 21:14:22,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:22,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:14:23,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:23,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339724658] [2023-11-06 21:14:23,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339724658] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:14:23,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119903535] [2023-11-06 21:14:23,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:23,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:23,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:23,029 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:23,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:14:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:23,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:14:23,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:14:23,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:14:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:14:23,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119903535] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:14:23,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:14:23,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-11-06 21:14:23,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209206349] [2023-11-06 21:14:23,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:23,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:14:23,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:23,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:14:23,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:14:23,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 396 [2023-11-06 21:14:23,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 125 flow. Second operand has 5 states, 5 states have (on average 161.6) internal successors, (808), 5 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:23,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:23,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 396 [2023-11-06 21:14:23,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:23,635 INFO L124 PetriNetUnfolderBase]: 569/822 cut-off events. [2023-11-06 21:14:23,635 INFO L125 PetriNetUnfolderBase]: For 430/486 co-relation queries the response was YES. [2023-11-06 21:14:23,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2187 conditions, 822 events. 569/822 cut-off events. For 430/486 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3142 event pairs, 238 based on Foata normal form. 112/823 useless extension candidates. Maximal degree in co-relation 2157. Up to 617 conditions per place. [2023-11-06 21:14:23,644 INFO L140 encePairwiseOnDemand]: 391/396 looper letters, 42 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2023-11-06 21:14:23,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 49 transitions, 277 flow [2023-11-06 21:14:23,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:14:23,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 21:14:23,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 825 transitions. [2023-11-06 21:14:23,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-11-06 21:14:23,648 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 825 transitions. [2023-11-06 21:14:23,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 825 transitions. [2023-11-06 21:14:23,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:23,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 825 transitions. [2023-11-06 21:14:23,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 165.0) internal successors, (825), 5 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:23,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:23,660 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:23,660 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 125 flow. Second operand 5 states and 825 transitions. [2023-11-06 21:14:23,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 49 transitions, 277 flow [2023-11-06 21:14:23,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 49 transitions, 269 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 21:14:23,667 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 141 flow [2023-11-06 21:14:23,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=141, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2023-11-06 21:14:23,673 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 6 predicate places. [2023-11-06 21:14:23,673 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 141 flow [2023-11-06 21:14:23,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 161.6) internal successors, (808), 5 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:23,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:23,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:23,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:14:23,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:23,880 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:14:23,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:23,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1747029254, now seen corresponding path program 1 times [2023-11-06 21:14:23,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:23,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460318092] [2023-11-06 21:14:23,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:23,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:14:26,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:26,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460318092] [2023-11-06 21:14:26,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460318092] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:14:26,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205104058] [2023-11-06 21:14:26,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:26,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:26,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:26,192 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:26,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:14:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:26,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-06 21:14:26,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:26,714 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:14:26,850 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:14:27,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:14:27,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:14:27,169 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 21:14:27,169 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2023-11-06 21:14:27,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:14:27,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:14:27,366 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 21:14:27,367 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2023-11-06 21:14:27,526 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:14:27,527 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-06 21:14:27,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:14:27,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:14:27,977 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_137 (Array Int Int)) (v_ArrVal_136 (Array Int Int))) (= (let ((.cse0 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (+ (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse0)) (select (select |c_#memory_int| c_~B~0.base) (+ .cse0 c_~B~0.offset)) c_~res1~0)) (let ((.cse1 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_136) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_137)) (.cse2 (* 4 c_~M~0))) (+ (select (select .cse1 c_~A~0.base) (+ c_~A~0.offset .cse2)) c_~res2~0 (select (select .cse1 c_~B~0.base) (+ .cse2 c_~B~0.offset)))))) is different from false [2023-11-06 21:14:27,992 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_137 (Array Int Int)) (v_ArrVal_136 (Array Int Int))) (= (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) (select (select |c_#memory_int| c_~B~0.base) c_~B~0.offset) c_~res1~0) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_136) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_137)) (.cse1 (* 4 c_~M~0))) (+ (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1)) c_~res2~0 (select (select .cse0 c_~B~0.base) (+ .cse1 c_~B~0.offset)))))) is different from false [2023-11-06 21:14:28,204 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:14:28,205 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 70 [2023-11-06 21:14:28,355 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:14:28,358 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 153590 treesize of output 129082 [2023-11-06 21:14:28,666 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:14:28,667 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2006 treesize of output 1630 [2023-11-06 21:14:28,758 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:14:28,759 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1622 treesize of output 1438 [2023-11-06 21:14:28,900 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:14:28,900 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1430 treesize of output 1262 [2023-11-06 21:15:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-06 21:15:26,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205104058] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:15:26,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:15:26,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2023-11-06 21:15:26,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715307704] [2023-11-06 21:15:26,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:15:26,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 21:15:26,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:26,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 21:15:26,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=909, Unknown=37, NotChecked=126, Total=1190 [2023-11-06 21:15:26,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 396 [2023-11-06 21:15:26,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 141 flow. Second operand has 35 states, 35 states have (on average 96.71428571428571) internal successors, (3385), 35 states have internal predecessors, (3385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:26,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:26,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 396 [2023-11-06 21:15:26,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:30,327 INFO L124 PetriNetUnfolderBase]: 1533/2217 cut-off events. [2023-11-06 21:15:30,327 INFO L125 PetriNetUnfolderBase]: For 1612/1612 co-relation queries the response was YES. [2023-11-06 21:15:30,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6511 conditions, 2217 events. 1533/2217 cut-off events. For 1612/1612 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9073 event pairs, 120 based on Foata normal form. 1/2062 useless extension candidates. Maximal degree in co-relation 4889. Up to 1101 conditions per place. [2023-11-06 21:15:30,355 INFO L140 encePairwiseOnDemand]: 380/396 looper letters, 128 selfloop transitions, 51 changer transitions 1/180 dead transitions. [2023-11-06 21:15:30,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 180 transitions, 989 flow [2023-11-06 21:15:30,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 21:15:30,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 21:15:30,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1889 transitions. [2023-11-06 21:15:30,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2650112233445567 [2023-11-06 21:15:30,368 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1889 transitions. [2023-11-06 21:15:30,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1889 transitions. [2023-11-06 21:15:30,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:30,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1889 transitions. [2023-11-06 21:15:30,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 104.94444444444444) internal successors, (1889), 18 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:30,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 396.0) internal successors, (7524), 19 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:30,399 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 396.0) internal successors, (7524), 19 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:30,400 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 141 flow. Second operand 18 states and 1889 transitions. [2023-11-06 21:15:30,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 180 transitions, 989 flow [2023-11-06 21:15:30,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 180 transitions, 973 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-06 21:15:30,414 INFO L231 Difference]: Finished difference. Result has 64 places, 80 transitions, 548 flow [2023-11-06 21:15:30,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=548, PETRI_PLACES=64, PETRI_TRANSITIONS=80} [2023-11-06 21:15:30,417 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 31 predicate places. [2023-11-06 21:15:30,421 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 80 transitions, 548 flow [2023-11-06 21:15:30,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 96.71428571428571) internal successors, (3385), 35 states have internal predecessors, (3385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:30,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:30,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:30,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:30,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:30,632 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:15:30,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:30,633 INFO L85 PathProgramCache]: Analyzing trace with hash 494422638, now seen corresponding path program 2 times [2023-11-06 21:15:30,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:30,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897844656] [2023-11-06 21:15:30,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:30,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:15:32,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:32,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897844656] [2023-11-06 21:15:32,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897844656] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:32,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186613551] [2023-11-06 21:15:32,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:15:32,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:32,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:32,574 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:32,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:15:32,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:15:32,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:15:32,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-06 21:15:32,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:33,091 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:15:33,092 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-06 21:15:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:15:33,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:33,268 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:15:33,268 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 78 [2023-11-06 21:15:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:15:33,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186613551] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:15:33,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:15:33,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 26 [2023-11-06 21:15:33,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729481215] [2023-11-06 21:15:33,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:15:33,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 21:15:33,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:33,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 21:15:33,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2023-11-06 21:15:37,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 396 [2023-11-06 21:15:37,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 80 transitions, 548 flow. Second operand has 28 states, 28 states have (on average 129.03571428571428) internal successors, (3613), 28 states have internal predecessors, (3613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:37,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:37,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 396 [2023-11-06 21:15:37,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:40,204 INFO L124 PetriNetUnfolderBase]: 2135/3070 cut-off events. [2023-11-06 21:15:40,204 INFO L125 PetriNetUnfolderBase]: For 6686/6686 co-relation queries the response was YES. [2023-11-06 21:15:40,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12742 conditions, 3070 events. 2135/3070 cut-off events. For 6686/6686 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13194 event pairs, 206 based on Foata normal form. 1/2891 useless extension candidates. Maximal degree in co-relation 10589. Up to 1918 conditions per place. [2023-11-06 21:15:40,251 INFO L140 encePairwiseOnDemand]: 381/396 looper letters, 168 selfloop transitions, 121 changer transitions 1/290 dead transitions. [2023-11-06 21:15:40,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 290 transitions, 2360 flow [2023-11-06 21:15:40,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 21:15:40,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 21:15:40,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4162 transitions. [2023-11-06 21:15:40,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3390355164548713 [2023-11-06 21:15:40,274 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4162 transitions. [2023-11-06 21:15:40,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4162 transitions. [2023-11-06 21:15:40,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:40,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4162 transitions. [2023-11-06 21:15:40,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 134.25806451612902) internal successors, (4162), 31 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:40,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 396.0) internal successors, (12672), 32 states have internal predecessors, (12672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:40,327 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 396.0) internal successors, (12672), 32 states have internal predecessors, (12672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:40,327 INFO L175 Difference]: Start difference. First operand has 64 places, 80 transitions, 548 flow. Second operand 31 states and 4162 transitions. [2023-11-06 21:15:40,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 290 transitions, 2360 flow [2023-11-06 21:15:40,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 290 transitions, 2266 flow, removed 43 selfloop flow, removed 2 redundant places. [2023-11-06 21:15:40,348 INFO L231 Difference]: Finished difference. Result has 110 places, 186 transitions, 1728 flow [2023-11-06 21:15:40,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1728, PETRI_PLACES=110, PETRI_TRANSITIONS=186} [2023-11-06 21:15:40,350 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 77 predicate places. [2023-11-06 21:15:40,350 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 186 transitions, 1728 flow [2023-11-06 21:15:40,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 129.03571428571428) internal successors, (3613), 28 states have internal predecessors, (3613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:40,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:40,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:40,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:40,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:40,561 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:15:40,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:40,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1490219502, now seen corresponding path program 3 times [2023-11-06 21:15:40,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:40,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426763334] [2023-11-06 21:15:40,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:40,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:15:42,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:42,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426763334] [2023-11-06 21:15:42,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426763334] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:42,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994521741] [2023-11-06 21:15:42,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:15:42,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:42,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:42,742 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:42,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:15:42,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 21:15:42,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:15:42,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 21:15:42,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:43,427 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:15:43,427 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2023-11-06 21:15:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:15:43,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:43,607 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:15:43,607 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 86 [2023-11-06 21:15:44,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:15:44,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994521741] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:15:44,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:15:44,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 28 [2023-11-06 21:15:44,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840063729] [2023-11-06 21:15:44,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:15:44,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 21:15:44,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:44,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 21:15:44,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2023-11-06 21:15:49,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 396 [2023-11-06 21:15:49,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 186 transitions, 1728 flow. Second operand has 30 states, 30 states have (on average 126.13333333333334) internal successors, (3784), 30 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:49,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:49,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 396 [2023-11-06 21:15:49,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:52,656 INFO L124 PetriNetUnfolderBase]: 2844/4111 cut-off events. [2023-11-06 21:15:52,656 INFO L125 PetriNetUnfolderBase]: For 26003/26003 co-relation queries the response was YES. [2023-11-06 21:15:52,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22111 conditions, 4111 events. 2844/4111 cut-off events. For 26003/26003 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 18845 event pairs, 278 based on Foata normal form. 1/4112 useless extension candidates. Maximal degree in co-relation 21054. Up to 2948 conditions per place. [2023-11-06 21:15:52,740 INFO L140 encePairwiseOnDemand]: 379/396 looper letters, 253 selfloop transitions, 191 changer transitions 1/445 dead transitions. [2023-11-06 21:15:52,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 445 transitions, 4823 flow [2023-11-06 21:15:52,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-06 21:15:52,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-06 21:15:52,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 4955 transitions. [2023-11-06 21:15:52,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3292796384901648 [2023-11-06 21:15:52,767 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 4955 transitions. [2023-11-06 21:15:52,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 4955 transitions. [2023-11-06 21:15:52,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:52,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 4955 transitions. [2023-11-06 21:15:52,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 130.39473684210526) internal successors, (4955), 38 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:52,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 396.0) internal successors, (15444), 39 states have internal predecessors, (15444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:52,831 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 396.0) internal successors, (15444), 39 states have internal predecessors, (15444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:52,831 INFO L175 Difference]: Start difference. First operand has 110 places, 186 transitions, 1728 flow. Second operand 38 states and 4955 transitions. [2023-11-06 21:15:52,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 445 transitions, 4823 flow [2023-11-06 21:15:52,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 445 transitions, 4229 flow, removed 257 selfloop flow, removed 5 redundant places. [2023-11-06 21:15:52,949 INFO L231 Difference]: Finished difference. Result has 157 places, 321 transitions, 3280 flow [2023-11-06 21:15:52,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=1490, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3280, PETRI_PLACES=157, PETRI_TRANSITIONS=321} [2023-11-06 21:15:52,950 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 124 predicate places. [2023-11-06 21:15:52,950 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 321 transitions, 3280 flow [2023-11-06 21:15:52,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 126.13333333333334) internal successors, (3784), 30 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:52,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:52,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:52,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-06 21:15:53,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 21:15:53,161 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:15:53,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:53,161 INFO L85 PathProgramCache]: Analyzing trace with hash 671813624, now seen corresponding path program 4 times [2023-11-06 21:15:53,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:53,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907796468] [2023-11-06 21:15:53,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:53,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:53,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:15:54,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:54,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907796468] [2023-11-06 21:15:54,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907796468] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:54,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506727791] [2023-11-06 21:15:54,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:15:54,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:54,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:54,265 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:54,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:15:54,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:15:54,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:15:54,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 21:15:54,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:54,953 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:15:54,953 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-06 21:15:54,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:15:54,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:55,104 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:15:55,105 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 86 [2023-11-06 21:15:55,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:15:55,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506727791] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:15:55,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:15:55,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 24 [2023-11-06 21:15:55,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51682089] [2023-11-06 21:15:55,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:15:55,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 21:15:55,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:55,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 21:15:55,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2023-11-06 21:15:57,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 396 [2023-11-06 21:15:57,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 321 transitions, 3280 flow. Second operand has 26 states, 26 states have (on average 137.3846153846154) internal successors, (3572), 26 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:57,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:57,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 396 [2023-11-06 21:15:57,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:16:00,301 INFO L124 PetriNetUnfolderBase]: 3396/4914 cut-off events. [2023-11-06 21:16:00,302 INFO L125 PetriNetUnfolderBase]: For 34242/34242 co-relation queries the response was YES. [2023-11-06 21:16:00,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28733 conditions, 4914 events. 3396/4914 cut-off events. For 34242/34242 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23347 event pairs, 409 based on Foata normal form. 37/4951 useless extension candidates. Maximal degree in co-relation 28213. Up to 3247 conditions per place. [2023-11-06 21:16:00,398 INFO L140 encePairwiseOnDemand]: 380/396 looper letters, 212 selfloop transitions, 308 changer transitions 1/521 dead transitions. [2023-11-06 21:16:00,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 521 transitions, 6265 flow [2023-11-06 21:16:00,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 21:16:00,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-06 21:16:00,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3829 transitions. [2023-11-06 21:16:00,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35811821922933035 [2023-11-06 21:16:00,410 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3829 transitions. [2023-11-06 21:16:00,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3829 transitions. [2023-11-06 21:16:00,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:16:00,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3829 transitions. [2023-11-06 21:16:00,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 141.8148148148148) internal successors, (3829), 27 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:00,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 396.0) internal successors, (11088), 28 states have internal predecessors, (11088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:00,448 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 396.0) internal successors, (11088), 28 states have internal predecessors, (11088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:00,449 INFO L175 Difference]: Start difference. First operand has 157 places, 321 transitions, 3280 flow. Second operand 27 states and 3829 transitions. [2023-11-06 21:16:00,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 521 transitions, 6265 flow [2023-11-06 21:16:00,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 521 transitions, 6091 flow, removed 49 selfloop flow, removed 8 redundant places. [2023-11-06 21:16:00,671 INFO L231 Difference]: Finished difference. Result has 190 places, 440 transitions, 5573 flow [2023-11-06 21:16:00,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=3146, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5573, PETRI_PLACES=190, PETRI_TRANSITIONS=440} [2023-11-06 21:16:00,675 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 157 predicate places. [2023-11-06 21:16:00,675 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 440 transitions, 5573 flow [2023-11-06 21:16:00,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 137.3846153846154) internal successors, (3572), 26 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:00,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:16:00,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:00,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:00,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 21:16:00,883 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:16:00,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:00,884 INFO L85 PathProgramCache]: Analyzing trace with hash -627351672, now seen corresponding path program 5 times [2023-11-06 21:16:00,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:00,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310504376] [2023-11-06 21:16:00,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:00,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:00,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:02,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:02,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:02,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310504376] [2023-11-06 21:16:02,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310504376] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:02,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609604937] [2023-11-06 21:16:02,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:16:02,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:02,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:02,845 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:02,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:16:03,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:16:03,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:16:03,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-06 21:16:03,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:03,632 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:16:03,632 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-06 21:16:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:16:03,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:03,770 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:16:03,770 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 86 [2023-11-06 21:16:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:16:04,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609604937] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:04,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:04,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 26 [2023-11-06 21:16:04,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944773394] [2023-11-06 21:16:04,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:04,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 21:16:04,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:04,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 21:16:04,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2023-11-06 21:16:08,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 396 [2023-11-06 21:16:08,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 440 transitions, 5573 flow. Second operand has 28 states, 28 states have (on average 129.10714285714286) internal successors, (3615), 28 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:08,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:16:08,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 396 [2023-11-06 21:16:08,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:16:13,030 INFO L124 PetriNetUnfolderBase]: 4963/7215 cut-off events. [2023-11-06 21:16:13,030 INFO L125 PetriNetUnfolderBase]: For 64015/64152 co-relation queries the response was YES. [2023-11-06 21:16:13,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47476 conditions, 7215 events. 4963/7215 cut-off events. For 64015/64152 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 37806 event pairs, 541 based on Foata normal form. 93/7264 useless extension candidates. Maximal degree in co-relation 47275. Up to 4530 conditions per place. [2023-11-06 21:16:13,176 INFO L140 encePairwiseOnDemand]: 383/396 looper letters, 441 selfloop transitions, 294 changer transitions 2/758 dead transitions. [2023-11-06 21:16:13,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 758 transitions, 10280 flow [2023-11-06 21:16:13,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 21:16:13,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-06 21:16:13,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3672 transitions. [2023-11-06 21:16:13,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3434343434343434 [2023-11-06 21:16:13,187 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3672 transitions. [2023-11-06 21:16:13,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3672 transitions. [2023-11-06 21:16:13,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:16:13,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3672 transitions. [2023-11-06 21:16:13,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 136.0) internal successors, (3672), 27 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:13,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 396.0) internal successors, (11088), 28 states have internal predecessors, (11088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:13,218 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 396.0) internal successors, (11088), 28 states have internal predecessors, (11088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:13,218 INFO L175 Difference]: Start difference. First operand has 190 places, 440 transitions, 5573 flow. Second operand 27 states and 3672 transitions. [2023-11-06 21:16:13,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 758 transitions, 10280 flow [2023-11-06 21:16:13,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 758 transitions, 10043 flow, removed 113 selfloop flow, removed 4 redundant places. [2023-11-06 21:16:13,741 INFO L231 Difference]: Finished difference. Result has 219 places, 598 transitions, 8347 flow [2023-11-06 21:16:13,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=5362, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=8347, PETRI_PLACES=219, PETRI_TRANSITIONS=598} [2023-11-06 21:16:13,743 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 186 predicate places. [2023-11-06 21:16:13,743 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 598 transitions, 8347 flow [2023-11-06 21:16:13,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 129.10714285714286) internal successors, (3615), 28 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:13,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:16:13,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:13,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:13,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 21:16:13,951 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:16:13,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:13,952 INFO L85 PathProgramCache]: Analyzing trace with hash -2018058016, now seen corresponding path program 6 times [2023-11-06 21:16:13,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:13,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084577357] [2023-11-06 21:16:13,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:13,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:15,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:15,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084577357] [2023-11-06 21:16:15,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084577357] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:15,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337694278] [2023-11-06 21:16:15,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:16:15,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:15,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:15,721 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:15,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:16:15,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 21:16:15,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:16:15,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-06 21:16:15,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:16,275 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:16:16,276 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-06 21:16:16,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:16:16,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:16,414 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:16:16,414 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 86 [2023-11-06 21:16:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:16:16,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337694278] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:16,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:16,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 23 [2023-11-06 21:16:16,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141790639] [2023-11-06 21:16:16,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:16,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 21:16:16,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:16,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 21:16:16,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:16:19,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 396 [2023-11-06 21:16:19,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 598 transitions, 8347 flow. Second operand has 25 states, 25 states have (on average 131.24) internal successors, (3281), 25 states have internal predecessors, (3281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:19,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:16:19,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 396 [2023-11-06 21:16:19,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:16:23,536 INFO L124 PetriNetUnfolderBase]: 5620/8105 cut-off events. [2023-11-06 21:16:23,536 INFO L125 PetriNetUnfolderBase]: For 83640/83640 co-relation queries the response was YES. [2023-11-06 21:16:23,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57746 conditions, 8105 events. 5620/8105 cut-off events. For 83640/83640 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 42080 event pairs, 574 based on Foata normal form. 1/8106 useless extension candidates. Maximal degree in co-relation 56579. Up to 5475 conditions per place. [2023-11-06 21:16:23,754 INFO L140 encePairwiseOnDemand]: 380/396 looper letters, 336 selfloop transitions, 457 changer transitions 1/794 dead transitions. [2023-11-06 21:16:23,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 794 transitions, 11990 flow [2023-11-06 21:16:23,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 21:16:23,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 21:16:23,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4088 transitions. [2023-11-06 21:16:23,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3441077441077441 [2023-11-06 21:16:23,768 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4088 transitions. [2023-11-06 21:16:23,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4088 transitions. [2023-11-06 21:16:23,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:16:23,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4088 transitions. [2023-11-06 21:16:23,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 136.26666666666668) internal successors, (4088), 30 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:23,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 396.0) internal successors, (12276), 31 states have internal predecessors, (12276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:23,805 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 396.0) internal successors, (12276), 31 states have internal predecessors, (12276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:23,805 INFO L175 Difference]: Start difference. First operand has 219 places, 598 transitions, 8347 flow. Second operand 30 states and 4088 transitions. [2023-11-06 21:16:23,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 794 transitions, 11990 flow [2023-11-06 21:16:24,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 794 transitions, 11372 flow, removed 267 selfloop flow, removed 11 redundant places. [2023-11-06 21:16:24,619 INFO L231 Difference]: Finished difference. Result has 246 places, 681 transitions, 10255 flow [2023-11-06 21:16:24,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=7823, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=380, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=10255, PETRI_PLACES=246, PETRI_TRANSITIONS=681} [2023-11-06 21:16:24,620 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 213 predicate places. [2023-11-06 21:16:24,620 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 681 transitions, 10255 flow [2023-11-06 21:16:24,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 131.24) internal successors, (3281), 25 states have internal predecessors, (3281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:24,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:16:24,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:24,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:24,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 21:16:24,829 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:16:24,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:24,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1410617936, now seen corresponding path program 7 times [2023-11-06 21:16:24,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:24,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814691829] [2023-11-06 21:16:24,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:24,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:26,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:26,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:26,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814691829] [2023-11-06 21:16:26,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814691829] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:26,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991341259] [2023-11-06 21:16:26,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:16:26,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:26,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:26,340 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:26,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:16:26,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:26,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-06 21:16:26,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:27,006 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:16:27,007 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-06 21:16:27,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:16:27,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:27,140 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:16:27,140 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 86 [2023-11-06 21:16:27,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:16:27,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991341259] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:27,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:27,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 26 [2023-11-06 21:16:27,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985053133] [2023-11-06 21:16:27,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:27,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 21:16:27,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:27,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 21:16:27,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2023-11-06 21:16:30,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 396 [2023-11-06 21:16:30,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 681 transitions, 10255 flow. Second operand has 28 states, 28 states have (on average 129.03571428571428) internal successors, (3613), 28 states have internal predecessors, (3613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:30,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:16:30,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 396 [2023-11-06 21:16:30,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:16:35,008 INFO L124 PetriNetUnfolderBase]: 6115/8875 cut-off events. [2023-11-06 21:16:35,008 INFO L125 PetriNetUnfolderBase]: For 94866/95036 co-relation queries the response was YES. [2023-11-06 21:16:35,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64096 conditions, 8875 events. 6115/8875 cut-off events. For 94866/95036 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 48132 event pairs, 973 based on Foata normal form. 113/8939 useless extension candidates. Maximal degree in co-relation 62992. Up to 7168 conditions per place. [2023-11-06 21:16:35,178 INFO L140 encePairwiseOnDemand]: 383/396 looper letters, 552 selfloop transitions, 304 changer transitions 1/878 dead transitions. [2023-11-06 21:16:35,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 878 transitions, 14324 flow [2023-11-06 21:16:35,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 21:16:35,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-06 21:16:35,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3748 transitions. [2023-11-06 21:16:35,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.338023088023088 [2023-11-06 21:16:35,187 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3748 transitions. [2023-11-06 21:16:35,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3748 transitions. [2023-11-06 21:16:35,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:16:35,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3748 transitions. [2023-11-06 21:16:35,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 133.85714285714286) internal successors, (3748), 28 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:35,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 396.0) internal successors, (11484), 29 states have internal predecessors, (11484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:35,213 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 396.0) internal successors, (11484), 29 states have internal predecessors, (11484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:35,213 INFO L175 Difference]: Start difference. First operand has 246 places, 681 transitions, 10255 flow. Second operand 28 states and 3748 transitions. [2023-11-06 21:16:35,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 878 transitions, 14324 flow [2023-11-06 21:16:35,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 878 transitions, 13997 flow, removed 107 selfloop flow, removed 9 redundant places. [2023-11-06 21:16:35,866 INFO L231 Difference]: Finished difference. Result has 273 places, 785 transitions, 12415 flow [2023-11-06 21:16:35,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=9932, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=12415, PETRI_PLACES=273, PETRI_TRANSITIONS=785} [2023-11-06 21:16:35,868 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 240 predicate places. [2023-11-06 21:16:35,868 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 785 transitions, 12415 flow [2023-11-06 21:16:35,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 129.03571428571428) internal successors, (3613), 28 states have internal predecessors, (3613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:35,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:16:35,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:35,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:36,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:36,070 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:16:36,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:36,071 INFO L85 PathProgramCache]: Analyzing trace with hash -941703622, now seen corresponding path program 8 times [2023-11-06 21:16:36,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:36,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408948504] [2023-11-06 21:16:36,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:36,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:36,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:37,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:37,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:37,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408948504] [2023-11-06 21:16:37,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408948504] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:37,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212122701] [2023-11-06 21:16:37,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:16:37,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:37,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:37,564 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:37,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 21:16:37,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:16:37,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:16:37,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 21:16:37,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:38,179 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:16:38,179 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-06 21:16:38,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:16:38,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:38,298 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:16:38,298 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 86 [2023-11-06 21:16:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:16:38,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212122701] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:38,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:38,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 28 [2023-11-06 21:16:38,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135146967] [2023-11-06 21:16:38,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:38,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 21:16:38,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:38,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 21:16:38,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2023-11-06 21:16:41,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 396 [2023-11-06 21:16:41,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 785 transitions, 12415 flow. Second operand has 30 states, 30 states have (on average 130.06666666666666) internal successors, (3902), 30 states have internal predecessors, (3902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:41,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:16:41,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 396 [2023-11-06 21:16:41,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:16:48,250 INFO L124 PetriNetUnfolderBase]: 7975/11443 cut-off events. [2023-11-06 21:16:48,251 INFO L125 PetriNetUnfolderBase]: For 137243/137243 co-relation queries the response was YES. [2023-11-06 21:16:48,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87697 conditions, 11443 events. 7975/11443 cut-off events. For 137243/137243 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 62242 event pairs, 679 based on Foata normal form. 1/11444 useless extension candidates. Maximal degree in co-relation 86463. Up to 6874 conditions per place. [2023-11-06 21:16:48,541 INFO L140 encePairwiseOnDemand]: 380/396 looper letters, 446 selfloop transitions, 695 changer transitions 1/1142 dead transitions. [2023-11-06 21:16:48,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 1142 transitions, 19243 flow [2023-11-06 21:16:48,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 21:16:48,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-06 21:16:48,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5034 transitions. [2023-11-06 21:16:48,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34357084357084355 [2023-11-06 21:16:48,553 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5034 transitions. [2023-11-06 21:16:48,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5034 transitions. [2023-11-06 21:16:48,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:16:48,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5034 transitions. [2023-11-06 21:16:48,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 136.05405405405406) internal successors, (5034), 37 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:48,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 396.0) internal successors, (15048), 38 states have internal predecessors, (15048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:48,589 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 396.0) internal successors, (15048), 38 states have internal predecessors, (15048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:48,589 INFO L175 Difference]: Start difference. First operand has 273 places, 785 transitions, 12415 flow. Second operand 37 states and 5034 transitions. [2023-11-06 21:16:48,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 1142 transitions, 19243 flow [2023-11-06 21:16:49,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 1142 transitions, 18798 flow, removed 204 selfloop flow, removed 8 redundant places. [2023-11-06 21:16:49,748 INFO L231 Difference]: Finished difference. Result has 312 places, 985 transitions, 17383 flow [2023-11-06 21:16:49,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=12158, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=523, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=17383, PETRI_PLACES=312, PETRI_TRANSITIONS=985} [2023-11-06 21:16:49,749 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 279 predicate places. [2023-11-06 21:16:49,749 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 985 transitions, 17383 flow [2023-11-06 21:16:49,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 130.06666666666666) internal successors, (3902), 30 states have internal predecessors, (3902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:49,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:16:49,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:49,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:49,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:49,952 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:16:49,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:49,953 INFO L85 PathProgramCache]: Analyzing trace with hash -2054535662, now seen corresponding path program 9 times [2023-11-06 21:16:49,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:49,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635389040] [2023-11-06 21:16:49,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:49,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:50,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:50,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:16:50,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:50,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635389040] [2023-11-06 21:16:50,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635389040] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:50,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202676607] [2023-11-06 21:16:50,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:16:50,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:50,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:50,857 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:50,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 21:16:51,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 21:16:51,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:16:51,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-06 21:16:51,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:51,613 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:16:51,614 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-06 21:16:51,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:16:51,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:51,781 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:16:51,781 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 78 [2023-11-06 21:16:52,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:16:52,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202676607] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:52,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:52,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-06 21:16:52,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806657550] [2023-11-06 21:16:52,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:52,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 21:16:52,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:52,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 21:16:52,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:16:54,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 396 [2023-11-06 21:16:54,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 985 transitions, 17383 flow. Second operand has 25 states, 25 states have (on average 137.36) internal successors, (3434), 25 states have internal predecessors, (3434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:54,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:16:54,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 396 [2023-11-06 21:16:54,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:17:01,067 INFO L124 PetriNetUnfolderBase]: 8450/12253 cut-off events. [2023-11-06 21:17:01,067 INFO L125 PetriNetUnfolderBase]: For 164027/164185 co-relation queries the response was YES. [2023-11-06 21:17:01,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99330 conditions, 12253 events. 8450/12253 cut-off events. For 164027/164185 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 69554 event pairs, 1299 based on Foata normal form. 101/12301 useless extension candidates. Maximal degree in co-relation 98807. Up to 10344 conditions per place. [2023-11-06 21:17:01,442 INFO L140 encePairwiseOnDemand]: 383/396 looper letters, 776 selfloop transitions, 412 changer transitions 1/1210 dead transitions. [2023-11-06 21:17:01,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 1210 transitions, 23124 flow [2023-11-06 21:17:01,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 21:17:01,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-06 21:17:01,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3681 transitions. [2023-11-06 21:17:01,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575174825174825 [2023-11-06 21:17:01,451 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3681 transitions. [2023-11-06 21:17:01,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3681 transitions. [2023-11-06 21:17:01,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:17:01,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3681 transitions. [2023-11-06 21:17:01,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 141.57692307692307) internal successors, (3681), 26 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:01,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 396.0) internal successors, (10692), 27 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:01,473 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 396.0) internal successors, (10692), 27 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:01,473 INFO L175 Difference]: Start difference. First operand has 312 places, 985 transitions, 17383 flow. Second operand 26 states and 3681 transitions. [2023-11-06 21:17:01,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 1210 transitions, 23124 flow [2023-11-06 21:17:03,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 1210 transitions, 21883 flow, removed 515 selfloop flow, removed 13 redundant places. [2023-11-06 21:17:03,244 INFO L231 Difference]: Finished difference. Result has 328 places, 1130 transitions, 19838 flow [2023-11-06 21:17:03,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=16293, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=985, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=19838, PETRI_PLACES=328, PETRI_TRANSITIONS=1130} [2023-11-06 21:17:03,245 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 295 predicate places. [2023-11-06 21:17:03,246 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 1130 transitions, 19838 flow [2023-11-06 21:17:03,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 137.36) internal successors, (3434), 25 states have internal predecessors, (3434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:03,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:17:03,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:17:03,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 21:17:03,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 21:17:03,452 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:17:03,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:17:03,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1237100320, now seen corresponding path program 10 times [2023-11-06 21:17:03,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:17:03,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052505732] [2023-11-06 21:17:03,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:17:03,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:17:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:17:04,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:04,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:17:04,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052505732] [2023-11-06 21:17:04,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052505732] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:17:04,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462436031] [2023-11-06 21:17:04,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:17:04,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:04,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:17:04,886 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:17:04,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 21:17:05,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:17:05,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:17:05,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 21:17:05,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:17:05,396 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:17:05,396 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2023-11-06 21:17:05,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:17:05,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:17:05,607 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:17:05,608 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 78 [2023-11-06 21:17:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:17:05,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462436031] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:17:05,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:17:05,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 28 [2023-11-06 21:17:05,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478361506] [2023-11-06 21:17:05,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:17:05,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 21:17:05,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:17:05,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 21:17:05,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2023-11-06 21:17:09,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 396 [2023-11-06 21:17:09,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 1130 transitions, 19838 flow. Second operand has 30 states, 30 states have (on average 129.03333333333333) internal successors, (3871), 30 states have internal predecessors, (3871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:09,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:17:09,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 396 [2023-11-06 21:17:09,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:17:17,188 INFO L124 PetriNetUnfolderBase]: 8978/12900 cut-off events. [2023-11-06 21:17:17,188 INFO L125 PetriNetUnfolderBase]: For 162684/162684 co-relation queries the response was YES. [2023-11-06 21:17:17,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102612 conditions, 12900 events. 8978/12900 cut-off events. For 162684/162684 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 72295 event pairs, 1053 based on Foata normal form. 1/12901 useless extension candidates. Maximal degree in co-relation 101316. Up to 9549 conditions per place. [2023-11-06 21:17:17,512 INFO L140 encePairwiseOnDemand]: 381/396 looper letters, 533 selfloop transitions, 716 changer transitions 1/1250 dead transitions. [2023-11-06 21:17:17,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 1250 transitions, 23593 flow [2023-11-06 21:17:17,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 21:17:17,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 21:17:17,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4141 transitions. [2023-11-06 21:17:17,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3373248615184099 [2023-11-06 21:17:17,520 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4141 transitions. [2023-11-06 21:17:17,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4141 transitions. [2023-11-06 21:17:17,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:17:17,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4141 transitions. [2023-11-06 21:17:17,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 133.58064516129033) internal successors, (4141), 31 states have internal predecessors, (4141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:17,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 396.0) internal successors, (12672), 32 states have internal predecessors, (12672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:17,549 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 396.0) internal successors, (12672), 32 states have internal predecessors, (12672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:17,549 INFO L175 Difference]: Start difference. First operand has 328 places, 1130 transitions, 19838 flow. Second operand 31 states and 4141 transitions. [2023-11-06 21:17:17,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 1250 transitions, 23593 flow [2023-11-06 21:17:18,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 1250 transitions, 23100 flow, removed 180 selfloop flow, removed 12 redundant places. [2023-11-06 21:17:19,083 INFO L231 Difference]: Finished difference. Result has 349 places, 1155 transitions, 21380 flow [2023-11-06 21:17:19,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=19395, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=693, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=21380, PETRI_PLACES=349, PETRI_TRANSITIONS=1155} [2023-11-06 21:17:19,085 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 316 predicate places. [2023-11-06 21:17:19,085 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 1155 transitions, 21380 flow [2023-11-06 21:17:19,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 129.03333333333333) internal successors, (3871), 30 states have internal predecessors, (3871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:19,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:17:19,086 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:17:19,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-06 21:17:19,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:19,287 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:17:19,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:17:19,287 INFO L85 PathProgramCache]: Analyzing trace with hash -144896804, now seen corresponding path program 11 times [2023-11-06 21:17:19,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:17:19,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192612413] [2023-11-06 21:17:19,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:17:19,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:17:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:17:19,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:17:19,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:17:19,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192612413] [2023-11-06 21:17:19,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192612413] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:17:19,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736359291] [2023-11-06 21:17:19,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:17:19,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:19,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:17:19,493 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:17:19,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 21:17:19,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:17:19,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:17:19,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 21:17:19,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:17:19,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:17:19,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:17:19,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:17:19,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736359291] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:17:19,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:17:19,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-06 21:17:19,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607137345] [2023-11-06 21:17:19,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:17:19,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 21:17:19,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:17:19,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 21:17:19,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:17:20,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 396 [2023-11-06 21:17:20,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 1155 transitions, 21380 flow. Second operand has 14 states, 14 states have (on average 159.85714285714286) internal successors, (2238), 14 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:20,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:17:20,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 396 [2023-11-06 21:17:20,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:17:27,316 INFO L124 PetriNetUnfolderBase]: 8228/12456 cut-off events. [2023-11-06 21:17:27,316 INFO L125 PetriNetUnfolderBase]: For 204531/204817 co-relation queries the response was YES. [2023-11-06 21:17:27,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100643 conditions, 12456 events. 8228/12456 cut-off events. For 204531/204817 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 79430 event pairs, 1281 based on Foata normal form. 940/13287 useless extension candidates. Maximal degree in co-relation 99338. Up to 6557 conditions per place. [2023-11-06 21:17:27,665 INFO L140 encePairwiseOnDemand]: 388/396 looper letters, 1201 selfloop transitions, 205 changer transitions 5/1452 dead transitions. [2023-11-06 21:17:27,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 1452 transitions, 28864 flow [2023-11-06 21:17:27,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:17:27,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 21:17:27,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1492 transitions. [2023-11-06 21:17:27,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186307519640853 [2023-11-06 21:17:27,668 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1492 transitions. [2023-11-06 21:17:27,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1492 transitions. [2023-11-06 21:17:27,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:17:27,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1492 transitions. [2023-11-06 21:17:27,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 165.77777777777777) internal successors, (1492), 9 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:27,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 396.0) internal successors, (3960), 10 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:27,678 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 396.0) internal successors, (3960), 10 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:27,678 INFO L175 Difference]: Start difference. First operand has 349 places, 1155 transitions, 21380 flow. Second operand 9 states and 1492 transitions. [2023-11-06 21:17:27,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 1452 transitions, 28864 flow [2023-11-06 21:17:29,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 1452 transitions, 27994 flow, removed 146 selfloop flow, removed 24 redundant places. [2023-11-06 21:17:29,275 INFO L231 Difference]: Finished difference. Result has 336 places, 1020 transitions, 19173 flow [2023-11-06 21:17:29,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=18258, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1016, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=811, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19173, PETRI_PLACES=336, PETRI_TRANSITIONS=1020} [2023-11-06 21:17:29,278 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 303 predicate places. [2023-11-06 21:17:29,278 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 1020 transitions, 19173 flow [2023-11-06 21:17:29,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 159.85714285714286) internal successors, (2238), 14 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:29,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:17:29,279 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:17:29,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 21:17:29,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:29,488 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:17:29,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:17:29,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1878985366, now seen corresponding path program 12 times [2023-11-06 21:17:29,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:17:29,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151471011] [2023-11-06 21:17:29,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:17:29,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:17:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:17:29,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:17:29,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:17:29,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151471011] [2023-11-06 21:17:29,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151471011] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:17:29,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563706673] [2023-11-06 21:17:29,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:17:29,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:29,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:17:29,760 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:17:29,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ce07c0-821b-4410-9854-73681f4c5dd6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 21:17:29,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 21:17:29,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:17:29,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 21:17:29,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:17:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:17:30,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:17:30,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:17:30,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563706673] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:17:30,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:17:30,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-11-06 21:17:30,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328613782] [2023-11-06 21:17:30,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:17:30,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 21:17:30,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:17:30,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 21:17:30,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-06 21:17:30,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 396 [2023-11-06 21:17:30,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 1020 transitions, 19173 flow. Second operand has 15 states, 15 states have (on average 164.33333333333334) internal successors, (2465), 15 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:30,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:17:30,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 396 [2023-11-06 21:17:30,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand